package main

import (
	"context"
	"database/sql"
	"encoding/json"
	"errors"
	"fmt"
	"math"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"time"

	"hamlog/internal/adif"
	"hamlog/internal/backup"
	"hamlog/internal/cat"
	"hamlog/internal/cluster"
	"hamlog/internal/db"
	"hamlog/internal/operating"
	"hamlog/internal/dxcc"
	"hamlog/internal/lookup"
	"hamlog/internal/profile"
	"hamlog/internal/qso"
	"hamlog/internal/rotator/pst"
	"hamlog/internal/settings"

	wruntime "github.com/wailsapp/wails/v2/pkg/runtime"
)

// Setting keys.
const (
	keyQRZUser     = "lookup.qrz.user"
	keyQRZPassword = "lookup.qrz.password"
	keyHQUser      = "lookup.hamqth.user"
	keyHQPassword  = "lookup.hamqth.password"
	keyCacheTTL    = "lookup.cache.ttl_days"
	// Provider routing. Each value is a provider name (qrz | hamqth)
	// or empty to disable that slot. Primary is consulted first;
	// Failsafe is the fallback when Primary returns not-found or errs.
	keyLookupPrimary  = "lookup.primary"
	keyLookupFailsafe = "lookup.failsafe"
	keyLookupImages   = "lookup.download_images" // 1 = expose QRZ ImageURL to UI

	keyStationCallsign = "station.callsign"
	keyStationOperator = "station.operator"
	keyStationMyGrid   = "station.my_grid"
	keyStationCountry  = "station.my_country"
	keyStationSOTA     = "station.my_sota_ref"
	keyStationPOTA     = "station.my_pota_ref"

	keyListsBands = "lists.bands"
	keyListsModes = "lists.modes"

	keyCATEnabled        = "cat.enabled"
	keyCATBackend        = "cat.backend"          // "omnirig" (only one for now)
	keyCATOmniRigNum     = "cat.omnirig.rig"      // 1 or 2
	keyCATPollMs         = "cat.poll_ms"
	keyCATDelayMs        = "cat.delay_ms"         // pause between commands
	keyCATDigitalDefault = "cat.digital_default"  // mode to use when CAT reports DATA

	keyRotatorEnabled       = "rotator.enabled"
	keyRotatorHost          = "rotator.host"
	keyRotatorPort          = "rotator.port"
	keyRotatorHasElevation  = "rotator.has_elevation"

	keyClusterAutoConnect = "cluster.auto_connect" // open every enabled server at app start

	keyBackupEnabled  = "backup.enabled"
	keyBackupFolder   = "backup.folder"
	keyBackupRotation = "backup.rotation"
	keyBackupZip      = "backup.zip"
	keyBackupLast     = "backup.last_at"
)

// CATSettings is the user-tweakable rig-control configuration. Stored as
// individual key/value pairs to keep the settings table flat.
type CATSettings struct {
	Enabled        bool   `json:"enabled"`
	Backend        string `json:"backend"`         // currently always "omnirig"
	OmniRigNum     int    `json:"omnirig_rig"`     // 1 or 2 (OmniRig "Rig1"/"Rig2" slot)
	PollMs         int    `json:"poll_ms"`         // poll interval in ms (default 250)
	DelayMs        int    `json:"delay_ms"`        // pause between commands (default 0)
	DigitalDefault string `json:"digital_default"` // when CAT says DATA, surface this mode (FT8/FT4/RTTY/…)
}

// ModePreset is a mode entry with default RST values to auto-populate
// the entry form when the user picks this mode.
type ModePreset struct {
	Name           string `json:"name"`
	DefaultRSTSent string `json:"default_rst_sent,omitempty"`
	DefaultRSTRcvd string `json:"default_rst_rcvd,omitempty"`
}

// ListsSettings holds the user-customisable dropdown lists used by the
// entry form. Default values match common HF/VHF practice.
type ListsSettings struct {
	Bands []string     `json:"bands"`
	Modes []ModePreset `json:"modes"`
}

var defaultBands = []string{
	"160m", "80m", "60m", "40m", "30m", "20m", "17m", "15m",
	"12m", "10m", "6m", "2m", "70cm", "23cm",
}
var defaultModes = []ModePreset{
	{Name: "SSB", DefaultRSTSent: "59", DefaultRSTRcvd: "59"},
	{Name: "CW", DefaultRSTSent: "599", DefaultRSTRcvd: "599"},
	{Name: "FT8", DefaultRSTSent: "+00", DefaultRSTRcvd: "+00"},
	{Name: "FT4", DefaultRSTSent: "+00", DefaultRSTRcvd: "+00"},
	{Name: "RTTY", DefaultRSTSent: "599", DefaultRSTRcvd: "599"},
	{Name: "PSK31", DefaultRSTSent: "599", DefaultRSTRcvd: "599"},
	{Name: "AM", DefaultRSTSent: "59", DefaultRSTRcvd: "59"},
	{Name: "FM", DefaultRSTSent: "59", DefaultRSTRcvd: "59"},
	{Name: "DIGITALVOICE", DefaultRSTSent: "59", DefaultRSTRcvd: "59"},
}

// StationSettings holds the active operator profile. Used to stamp every
// new QSO so we don't ask the user to retype it for each contact.
// Multi-profile support (portable / SOTA …) will layer on top of this.
type StationSettings struct {
	Callsign  string `json:"callsign"`
	Operator  string `json:"operator"`
	MyGrid    string `json:"my_grid"`
	MyCountry string `json:"my_country"`
	MySOTARef string `json:"my_sota_ref"`
	MyPOTARef string `json:"my_pota_ref"`
}

// LookupSettings is the JSON shape exchanged with the frontend.
// Primary / Failsafe hold a provider name ("qrz" | "hamqth" | "") to
// route lookups: primary first, failsafe on not-found / error.
type LookupSettings struct {
	QRZUser         string `json:"qrz_user"`
	QRZPassword     string `json:"qrz_password"`
	HamQTHUser      string `json:"hamqth_user"`
	HamQTHPassword  string `json:"hamqth_password"`
	Primary         string `json:"primary"`
	Failsafe        string `json:"failsafe"`
	DownloadImages  bool   `json:"download_images"` // show QRZ profile pictures in the UI
	CacheTTLDays    int    `json:"cache_ttl_days"`
}

// App is the application context bound to the Wails runtime.
type App struct {
	ctx        context.Context
	db         *sql.DB
	qso        *qso.Repo
	settings   *settings.Store
	profiles   *profile.Repo
	lookup     *lookup.Manager
	cache      *lookup.Cache
	cat        *cat.Manager
	dxcc       *dxcc.Manager
	cluster    *cluster.Manager
	operating  *operating.Repo
	startupErr string // captured for surfacing to the frontend
	dbPath     string

	// shuttingDown gates beforeClose re-entry: the first user attempt to
	// close fires shutdown tasks (backup, future LoTW upload, ...) while
	// blocking the window close; the subsequent programmatic Quit() call
	// must be allowed through.
	shuttingDown bool

	// Cached operator location used to compute distance/bearing for
	// cluster spots. Refreshed on profile activation; zero means
	// "unknown" and we skip the per-spot computation.
	opLat float64
	opLon float64
	opSet bool
}

// gridToLatLon parses a Maidenhead locator (4 or 6 chars) and returns the
// centre lat/lon in degrees. Returns ok=false on malformed input.
func gridToLatLon(grid string) (lat, lon float64, ok bool) {
	g := strings.ToUpper(strings.TrimSpace(grid))
	if len(g) < 4 {
		return 0, 0, false
	}
	A := g[0] - 'A'
	B := g[1] - 'A'
	C := g[2] - '0'
	D := g[3] - '0'
	if A > 17 || B > 17 || C > 9 || D > 9 {
		return 0, 0, false
	}
	lon = -180 + float64(A)*20 + float64(C)*2
	lat = -90 + float64(B)*10 + float64(D)*1
	if len(g) >= 6 {
		E := g[4] - 'A'
		F := g[5] - 'A'
		if E <= 23 && F <= 23 {
			lon += float64(E)*(5.0/60.0) + 2.5/60.0
			lat += float64(F)*(2.5/60.0) + 1.25/60.0
			return lat, lon, true
		}
	}
	// 4-char locator: aim at the centre of the square.
	lon += 1
	lat += 0.5
	return lat, lon, true
}

// haversineKm returns the great-circle distance between two lat/lon pairs
// in kilometres. Standard Haversine, mean Earth radius 6371 km.
func haversineKm(lat1, lon1, lat2, lon2 float64) float64 {
	const R = 6371.0
	rad := math.Pi / 180.0
	dLat := (lat2 - lat1) * rad
	dLon := (lon2 - lon1) * rad
	a := math.Sin(dLat/2)*math.Sin(dLat/2) +
		math.Cos(lat1*rad)*math.Cos(lat2*rad)*math.Sin(dLon/2)*math.Sin(dLon/2)
	c := 2 * math.Atan2(math.Sqrt(a), math.Sqrt(1-a))
	return R * c
}

// initialBearingDeg returns the initial great-circle bearing (azimuth) in
// degrees [0, 360) from (lat1, lon1) towards (lat2, lon2). This is the
// "short path" heading.
func initialBearingDeg(lat1, lon1, lat2, lon2 float64) float64 {
	rad := math.Pi / 180.0
	dLon := (lon2 - lon1) * rad
	y := math.Sin(dLon) * math.Cos(lat2*rad)
	x := math.Cos(lat1*rad)*math.Sin(lat2*rad) -
		math.Sin(lat1*rad)*math.Cos(lat2*rad)*math.Cos(dLon)
	deg := math.Atan2(y, x) / rad
	if deg < 0 {
		deg += 360
	}
	return deg
}

// refreshOperatorGrid reloads the active profile and caches its grid as
// lat/lon. Called at startup and after profile activation so the cluster
// onSpot callback can compute distance/bearing without hitting the DB
// per spot.
func (a *App) refreshOperatorGrid() {
	a.opSet = false
	if a.profiles == nil || a.ctx == nil {
		return
	}
	p, err := a.profiles.Active(a.ctx)
	if err != nil {
		return
	}
	lat, lon, ok := gridToLatLon(p.MyGrid)
	if !ok {
		return
	}
	a.opLat = lat
	a.opLon = lon
	a.opSet = true
}

// dxccAdapter bridges *dxcc.Manager to the lookup.DXCCResolver interface
// without making the lookup package import dxcc.
type dxccAdapter struct{ m *dxcc.Manager }

func (a dxccAdapter) Resolve(call string) (country, continent string, cqz, ituz int, lat, lon float64, ok bool) {
	if a.m == nil {
		return
	}
	mm, found := a.m.Lookup(call)
	if !found || mm.Entity == nil {
		return
	}
	return mm.Entity.Name, mm.Continent, mm.CQZone, mm.ITUZone, mm.Lat, mm.Lon, true
}

func NewApp() *App { return &App{} }

func (a *App) startup(ctx context.Context) {
	a.ctx = ctx

	dataDir, err := userDataDir()
	if err != nil {
		a.startupErr = "cannot resolve data dir: " + err.Error()
		fmt.Println("HamLog:", a.startupErr)
		return
	}
	if err := os.MkdirAll(dataDir, 0o755); err != nil {
		a.startupErr = "cannot create data dir: " + err.Error()
		fmt.Println("HamLog:", a.startupErr)
		return
	}
	a.dbPath = filepath.Join(dataDir, "hamlog.db")
	conn, err := db.Open(a.dbPath)
	if err != nil {
		a.startupErr = "cannot open db: " + err.Error()
		fmt.Println("HamLog:", a.startupErr)
		return
	}
	a.db = conn
	a.qso = qso.NewRepo(conn)
	a.settings = settings.NewStore(conn)
	a.profiles = profile.NewRepo(conn)
	a.operating = operating.NewRepo(conn)
	// On first run, copy the legacy single-station settings into a
	// "Default" profile so the user's existing config carries over without
	// any manual step. Subsequent runs just confirm an active profile.
	if _, err := profile.EnsureDefault(a.ctx, conn, a.settings, profile.LegacyStationKeys{
		Callsign: keyStationCallsign,
		Operator: keyStationOperator,
		MyGrid:   keyStationMyGrid,
		Country:  keyStationCountry,
		SOTA:     keyStationSOTA,
		POTA:     keyStationPOTA,
	}); err != nil {
		fmt.Println("HamLog: EnsureDefault profile:", err)
	}
	a.cache = lookup.NewCache(conn, 30*24*time.Hour)
	a.lookup = lookup.NewManager(a.cache)
	a.reloadLookupProviders()

	// cty.dat for offline DXCC / country resolution. Cached on disk; first
	// run downloads it from country-files.com in the background so startup
	// stays fast even if the network is slow.
	a.dxcc = dxcc.NewManager(dataDir)
	a.lookup.SetDXCCResolver(dxccAdapter{m: a.dxcc})
	go func() {
		if err := a.dxcc.EnsureLoaded(context.Background()); err != nil {
			fmt.Println("HamLog: cty.dat unavailable —", err)
			return
		}
		fmt.Println("HamLog: cty.dat loaded —", a.dxcc.Info().Entities, "entities")
	}()
	// CAT manager: emit pushes state to the frontend via Wails events.
	a.cat = cat.NewManager(func(s cat.RigState) {
		if a.ctx != nil {
			wruntime.EventsEmit(a.ctx, "cat:state", s)
		}
	})
	a.reloadCAT()

	// DX Cluster (multi-server): the spot callback enriches each spot
	// with country + continent via cty.dat BEFORE emitting it, so the UI
	// renders the row with all metadata already filled (no flicker of
	// empty Country / Cont columns while the batch status fetch runs).
	a.cluster = cluster.NewManager(
		func(s cluster.Spot) {
			if a.dxcc != nil {
				if m, ok := a.dxcc.Lookup(s.DXCall); ok && m.Entity != nil {
					s.Country = m.Entity.Name
					s.Continent = m.Continent
					s.CQZone = m.CQZone
					s.ITUZone = m.ITUZone
					if a.opSet && (m.Lat != 0 || m.Lon != 0) {
						s.DistanceKm = int(haversineKm(a.opLat, a.opLon, m.Lat, m.Lon) + 0.5)
						sp := initialBearingDeg(a.opLat, a.opLon, m.Lat, m.Lon)
						s.ShortPath = int(sp + 0.5)
						s.LongPath = (s.ShortPath + 180) % 360
					}
				}
			}
			if a.ctx != nil {
				wruntime.EventsEmit(a.ctx, "cluster:spot", s)
			}
		},
		func() {
			if a.ctx != nil {
				wruntime.EventsEmit(a.ctx, "cluster:state", a.cluster.Status())
			}
		},
	)
	a.refreshOperatorGrid()
	if cs, _ := a.clusterAutoConnect(); cs {
		a.startAllEnabledClusters()
	}

	fmt.Println("HamLog: db ready at", a.dbPath)
}

// StartupStatus returns a diagnostic snapshot for the frontend.
// dbPath is always populated; err is empty when the app is healthy.
type StartupStatus struct {
	OK     bool   `json:"ok"`
	Err    string `json:"err"`
	DBPath string `json:"db_path"`
}

// GetStartupStatus exposes whatever happened during startup so the UI
// can show a useful error instead of just "db not initialized".
func (a *App) GetStartupStatus() StartupStatus {
	return StartupStatus{
		OK:     a.startupErr == "",
		Err:    a.startupErr,
		DBPath: a.dbPath,
	}
}

// beforeClose intercepts the window-close event so we can run shutdown
// tasks (backup, future LoTW upload, ...) while showing a progress modal
// to the user. Returns true the first time to block the close; the
// goroutine eventually calls wruntime.Quit() which re-enters this method
// with shuttingDown=true and we let the close proceed.
func (a *App) beforeClose(ctx context.Context) bool {
	if a.shuttingDown {
		return false
	}
	a.shuttingDown = true

	steps := a.plannedShutdownSteps()
	if len(steps) == 0 {
		// Nothing to do — exit immediately, no need to flash a modal.
		return false
	}
	go a.runShutdownTasks(ctx, steps)
	return true
}

// shutdownStep is emitted to the frontend so the progress modal can
// render the task list and update each row's state as work progresses.
type shutdownStep struct {
	ID     string `json:"id"`
	Label  string `json:"label"`
	Status string `json:"status"` // "pending" | "running" | "done" | "error"
	Detail string `json:"detail,omitempty"`
}

// plannedShutdownSteps returns the tasks that will actually run, so the
// UI knows the full checklist up front. Right now that's just the backup
// (when enabled and not yet done today); LoTW upload, eQSL upload, etc.
// will append to this list as they land.
func (a *App) plannedShutdownSteps() []shutdownStep {
	var out []shutdownStep
	if s, err := a.GetBackupSettings(); err == nil && s.Enabled {
		folder := s.Folder
		if folder == "" {
			folder = s.DefaultFolder
		}
		if !backup.HasBackupToday(folder) {
			out = append(out, shutdownStep{ID: "backup", Label: "Backing up database", Status: "pending"})
		}
	}
	return out
}

func (a *App) emitShutdownEvent(name string, payload any) {
	if a.ctx != nil {
		wruntime.EventsEmit(a.ctx, name, payload)
	}
}

// runShutdownTasks executes every planned shutdown task in order,
// emitting progress events at each transition so the frontend modal
// stays in sync. Errors don't abort the sequence — we still want to
// give later steps a chance and ultimately close the app.
func (a *App) runShutdownTasks(ctx context.Context, steps []shutdownStep) {
	a.emitShutdownEvent("shutdown:start", steps)
	for i := range steps {
		steps[i].Status = "running"
		a.emitShutdownEvent("shutdown:update", steps)
		var err error
		switch steps[i].ID {
		case "backup":
			err = a.runBackupForShutdown()
		}
		if err != nil {
			steps[i].Status = "error"
			steps[i].Detail = err.Error()
		} else {
			steps[i].Status = "done"
		}
		a.emitShutdownEvent("shutdown:update", steps)
	}
	a.emitShutdownEvent("shutdown:done", steps)
	// Give the UI a moment to show the "done" state before we yank the
	// window away. 600ms feels purposeful without being annoying.
	time.Sleep(600 * time.Millisecond)
	wruntime.Quit(ctx)
}

// runBackupForShutdown is the same logic as maybeShutdownBackup but
// returns an error so the shutdown sequence can mark the step as failed.
func (a *App) runBackupForShutdown() error {
	if a.settings == nil || a.db == nil {
		return fmt.Errorf("db not ready")
	}
	s, err := a.GetBackupSettings()
	if err != nil {
		return err
	}
	folder := s.Folder
	if folder == "" {
		folder = s.DefaultFolder
	}
	if backup.HasBackupToday(folder) {
		return nil
	}
	if _, err := backup.Run(a.ctx, a.db, a.dbPath, folder, s.Rotation, s.Zip); err != nil {
		return err
	}
	return a.settings.Set(a.ctx, keyBackupLast, time.Now().UTC().Format(time.RFC3339))
}

func (a *App) shutdown(ctx context.Context) {
	// If the user managed to skip beforeClose (force kill, OS shutdown,
	// crash recovery) we still try the backup here as a best-effort
	// safety net. HasBackupToday makes a double-run a no-op.
	if !a.shuttingDown {
		a.maybeShutdownBackup()
	}
	if a.db != nil {
		_ = a.db.Close()
	}
}

func userDataDir() (string, error) {
	base, err := os.UserConfigDir()
	if err != nil {
		return "", err
	}
	return filepath.Join(base, "HamLog"), nil
}

// reloadLookupProviders rebuilds the lookup chain from current settings.
// Called at startup and after the user saves new credentials.
//
// Provider order honours the user's primary/failsafe choice. If they
// haven't picked one yet (fresh install), we default to "primary = first
// provider with creds" so the app still works out of the box.
func (a *App) reloadLookupProviders() {
	if a.lookup == nil {
		return
	}
	m, err := a.settings.GetMany(a.ctx,
		keyQRZUser, keyQRZPassword, keyHQUser, keyHQPassword,
		keyCacheTTL, keyLookupPrimary, keyLookupFailsafe)
	if err != nil {
		fmt.Println("HamLog: settings load error:", err)
		return
	}
	if days, _ := strconv.Atoi(m[keyCacheTTL]); days > 0 {
		a.cache.SetTTL(time.Duration(days) * 24 * time.Hour)
	}

	build := func(name string) lookup.Provider {
		switch name {
		case "qrz":
			if m[keyQRZUser] != "" && m[keyQRZPassword] != "" {
				return lookup.NewQRZ(m[keyQRZUser], m[keyQRZPassword])
			}
		case "hamqth":
			if m[keyHQUser] != "" && m[keyHQPassword] != "" {
				return lookup.NewHamQTH(m[keyHQUser], m[keyHQPassword])
			}
		}
		return nil
	}

	primary, failsafe := m[keyLookupPrimary], m[keyLookupFailsafe]
	// Fresh install fallback: prefer QRZ over HamQTH when both creds exist.
	if primary == "" && failsafe == "" {
		if m[keyQRZUser] != "" && m[keyQRZPassword] != "" {
			primary = "qrz"
			if m[keyHQUser] != "" && m[keyHQPassword] != "" {
				failsafe = "hamqth"
			}
		} else if m[keyHQUser] != "" && m[keyHQPassword] != "" {
			primary = "hamqth"
		}
	}

	var providers []lookup.Provider
	if p := build(primary); p != nil {
		providers = append(providers, p)
	}
	if failsafe != "" && failsafe != primary {
		if p := build(failsafe); p != nil {
			providers = append(providers, p)
		}
	}
	a.lookup.SetProviders(providers...)
}

// --- QSO bindings ---

func (a *App) AddQSO(q qso.QSO) (int64, error) {
	if a.qso == nil {
		return 0, fmt.Errorf("db not initialized")
	}
	a.applyStationDefaults(&q)
	return a.qso.Add(a.ctx, q)
}

// applyStationDefaults fills any empty MY_* / station field on q with the
// currently-active profile's values. Multi-profile support means a user
// can be /P with a different callsign + grid + SOTA ref than home — the
// QSO carries whichever profile was selected at log time.
func (a *App) applyStationDefaults(q *qso.QSO) {
	if a.profiles == nil {
		return
	}
	p, err := a.profiles.Active(a.ctx)
	if err != nil {
		return
	}
	if q.StationCallsign == "" {
		q.StationCallsign = p.Callsign
	}
	if q.Operator == "" {
		q.Operator = p.Operator
	}
	if q.MyGrid == "" {
		q.MyGrid = p.MyGrid
	}
	if q.MyCountry == "" {
		q.MyCountry = p.MyCountry
	}
	if q.MyState == "" {
		q.MyState = p.MyState
	}
	if q.MyCounty == "" {
		q.MyCounty = p.MyCounty
	}
	if q.MyStreet == "" {
		q.MyStreet = p.MyStreet
	}
	if q.MyCity == "" {
		q.MyCity = p.MyCity
	}
	if q.MyPostalCode == "" {
		q.MyPostalCode = p.MyPostalCode
	}
	if q.MySOTARef == "" {
		q.MySOTARef = p.MySOTARef
	}
	if q.MyPOTARef == "" {
		q.MyPOTARef = p.MyPOTARef
	}
	if q.MyRig == "" {
		q.MyRig = p.MyRig
	}
	if q.MyAntenna == "" {
		q.MyAntenna = p.MyAntenna
	}
	if q.TXPower == nil && p.TxPower != nil {
		v := *p.TxPower
		q.TXPower = &v
	}
}

func (a *App) ListQSO(f qso.ListFilter) ([]qso.QSO, error) {
	if a.qso == nil {
		return nil, fmt.Errorf("db not initialized")
	}
	return a.qso.List(a.ctx, f)
}

func (a *App) CountQSO() (int64, error) {
	if a.qso == nil {
		return 0, fmt.Errorf("db not initialized")
	}
	return a.qso.Count(a.ctx)
}

func (a *App) GetQSO(id int64) (qso.QSO, error) {
	if a.qso == nil {
		return qso.QSO{}, fmt.Errorf("db not initialized")
	}
	return a.qso.GetByID(a.ctx, id)
}

func (a *App) UpdateQSO(q qso.QSO) error {
	if a.qso == nil {
		return fmt.Errorf("db not initialized")
	}
	return a.qso.Update(a.ctx, q)
}

func (a *App) DeleteQSO(id int64) error {
	if a.qso == nil {
		return fmt.Errorf("db not initialized")
	}
	return a.qso.Delete(a.ctx, id)
}

// WorkedBefore returns prior contacts with the given callsign at both
// call and DXCC granularity. Pass dxccHint=0 when unknown — the function
// will infer it from past QSOs with the same call when possible.
func (a *App) WorkedBefore(callsign string, dxccHint int) (qso.WorkedBefore, error) {
	if a.qso == nil {
		return qso.WorkedBefore{}, fmt.Errorf("db not initialized")
	}
	return a.qso.WorkedBefore(a.ctx, callsign, dxccHint)
}

// SetCompactMode toggles a tiny always-on-top window that exposes just the
// QSO entry — useful when running on a single screen alongside WSJT-X,
// JT-Alert or the cluster.
//
// We can't easily spawn a real second OS window in Wails v2, but a resized
// always-on-top main window does the job from the user's perspective.
// Sizes tuned so the compact entry strip fits in a single row (no wrap).
// Min size must be reduced BEFORE resizing down, otherwise the OS clamps to
// the previous (larger) min — and increased BEFORE resizing up.
const (
	compactW, compactH = 980, 140
	normalW, normalH   = 1400, 900
	normalMinW, normalMinH = 1100, 700
)

func (a *App) SetCompactMode(on bool) {
	if a.ctx == nil {
		return
	}
	if on {
		wruntime.WindowSetMinSize(a.ctx, compactW, compactH)
		wruntime.WindowSetSize(a.ctx, compactW, compactH)
		wruntime.WindowSetAlwaysOnTop(a.ctx, true)
	} else {
		wruntime.WindowSetAlwaysOnTop(a.ctx, false)
		wruntime.WindowSetMinSize(a.ctx, normalMinW, normalMinH)
		wruntime.WindowSetSize(a.ctx, normalW, normalH)
	}
}

// DeleteAllQSO wipes every QSO. Returns the number of rows removed.
// The frontend MUST gate this behind a strong confirmation prompt.
func (a *App) DeleteAllQSO() (int64, error) {
	if a.qso == nil {
		return 0, fmt.Errorf("db not initialized")
	}
	return a.qso.DeleteAll(a.ctx)
}

// --- ADIF bindings ---

func (a *App) OpenADIFFile() (string, error) {
	return wruntime.OpenFileDialog(a.ctx, wruntime.OpenDialogOptions{
		Title: "Import ADIF",
		Filters: []wruntime.FileFilter{
			{DisplayName: "ADIF files (*.adi, *.adif)", Pattern: "*.adi;*.adif"},
			{DisplayName: "All files (*.*)", Pattern: "*.*"},
		},
	})
}

func (a *App) ImportADIF(path string, skipDuplicates bool) (adif.ImportResult, error) {
	if a.qso == nil {
		return adif.ImportResult{}, fmt.Errorf("db not initialized")
	}
	if path == "" {
		return adif.ImportResult{}, fmt.Errorf("empty path")
	}
	im := &adif.Importer{Repo: a.qso, SkipDuplicates: skipDuplicates}
	return im.ImportFile(a.ctx, path)
}

// SaveADIFFile shows a native Save-As dialog suggesting a timestamped
// HamLog_YYYYMMDD_HHMMSS.adi filename. Returns "" if the user cancelled.
func (a *App) SaveADIFFile() (string, error) {
	suggested := "HamLog_" + time.Now().UTC().Format("20060102_150405") + ".adi"
	return wruntime.SaveFileDialog(a.ctx, wruntime.SaveDialogOptions{
		Title:           "Export ADIF",
		DefaultFilename: suggested,
		Filters: []wruntime.FileFilter{
			{DisplayName: "ADIF files (*.adi, *.adif)", Pattern: "*.adi;*.adif"},
			{DisplayName: "All files (*.*)", Pattern: "*.*"},
		},
	})
}

// ExportADIF writes every QSO to the given file path in ADIF 3.1 format.
// Streams from DB so memory stays flat even with 100k+ records.
func (a *App) ExportADIF(path string) (adif.ExportResult, error) {
	if a.qso == nil {
		return adif.ExportResult{}, fmt.Errorf("db not initialized")
	}
	if path == "" {
		return adif.ExportResult{}, fmt.Errorf("empty path")
	}
	ex := &adif.Exporter{Repo: a.qso, AppName: "HamLog", AppVersion: "0.1"}
	return ex.ExportFile(a.ctx, path)
}

// --- Lookup bindings ---

// LookupCallsign returns the cached or freshly-fetched info for a callsign.
// Errors are returned as-is to the frontend; ErrNotFound surfaces as
// "callsign not found".
func (a *App) LookupCallsign(callsign string) (lookup.Result, error) {
	if a.lookup == nil {
		return lookup.Result{}, fmt.Errorf("lookup not initialized")
	}
	r, err := a.lookup.Lookup(a.ctx, callsign)
	if errors.Is(err, lookup.ErrNotFound) {
		return lookup.Result{}, fmt.Errorf("callsign not found")
	}
	// Respect the user's "Download profile images" setting: even if the
	// cache holds the URL we hide it when the toggle is off so the
	// frontend doesn't render the <img> (which would still fetch from
	// QRZ). Cheap to check per call — settings is in-memory after init.
	if err == nil && r.ImageURL != "" {
		if s, _ := a.GetLookupSettings(); !s.DownloadImages {
			r.ImageURL = ""
		}
	}
	return r, err
}

// OpenExternalURL opens a URL in the user's default browser. Wails ships
// runtime.BrowserOpenURL for exactly this — used by the QRZ.com icon
// next to the callsign field, the future Clublog/HamQTH shortcuts, etc.
func (a *App) OpenExternalURL(url string) error {
	url = strings.TrimSpace(url)
	if url == "" {
		return fmt.Errorf("empty URL")
	}
	if !strings.HasPrefix(url, "http://") && !strings.HasPrefix(url, "https://") {
		return fmt.Errorf("only http(s) URLs allowed, got %q", url)
	}
	wruntime.BrowserOpenURL(a.ctx, url)
	return nil
}

// GetLookupSettings returns current credentials and cache TTL.
func (a *App) GetLookupSettings() (LookupSettings, error) {
	if a.settings == nil {
		return LookupSettings{}, fmt.Errorf("db not initialized")
	}
	m, err := a.settings.GetMany(a.ctx,
		keyQRZUser, keyQRZPassword, keyHQUser, keyHQPassword,
		keyCacheTTL, keyLookupPrimary, keyLookupFailsafe, keyLookupImages)
	if err != nil {
		return LookupSettings{}, err
	}
	ttl, _ := strconv.Atoi(m[keyCacheTTL])
	if ttl <= 0 {
		ttl = 30
	}
	return LookupSettings{
		QRZUser:        m[keyQRZUser],
		QRZPassword:    m[keyQRZPassword],
		HamQTHUser:     m[keyHQUser],
		HamQTHPassword: m[keyHQPassword],
		Primary:        m[keyLookupPrimary],
		Failsafe:       m[keyLookupFailsafe],
		DownloadImages: m[keyLookupImages] == "1",
		CacheTTLDays:   ttl,
	}, nil
}

// SaveLookupSettings persists credentials and rebuilds the provider chain.
func (a *App) SaveLookupSettings(s LookupSettings) error {
	if a.settings == nil {
		return fmt.Errorf("db not initialized")
	}
	if s.CacheTTLDays <= 0 {
		s.CacheTTLDays = 30
	}
	// Reject a primary == failsafe routing combo — would just hit the same
	// provider twice. Frontend should prevent this but defend in depth.
	if s.Primary != "" && s.Primary == s.Failsafe {
		s.Failsafe = ""
	}
	for k, v := range map[string]string{
		keyQRZUser:        s.QRZUser,
		keyQRZPassword:    s.QRZPassword,
		keyHQUser:         s.HamQTHUser,
		keyHQPassword:     s.HamQTHPassword,
		keyCacheTTL:       strconv.Itoa(s.CacheTTLDays),
		keyLookupPrimary:  s.Primary,
		keyLookupFailsafe: s.Failsafe,
		keyLookupImages:   boolStr(s.DownloadImages),
	} {
		if err := a.settings.Set(a.ctx, k, v); err != nil {
			return err
		}
	}
	a.reloadLookupProviders()
	return nil
}

// TestLookupProvider runs a one-shot lookup against a specific provider so
// the user can verify credentials before saving. callsign defaults to the
// active profile's callsign when empty (handy "test against my own call").
// Returns the result on success or a descriptive error.
func (a *App) TestLookupProvider(name, callsign, user, password string) (lookup.Result, error) {
	if user == "" || password == "" {
		return lookup.Result{}, fmt.Errorf("user and password required")
	}
	if callsign == "" {
		if a.profiles != nil {
			if p, err := a.profiles.Active(a.ctx); err == nil {
				callsign = p.Callsign
			}
		}
		if callsign == "" {
			callsign = "W1AW" // ARRL HQ — always present in every database
		}
	}
	var p lookup.Provider
	switch name {
	case "qrz":
		p = lookup.NewQRZ(user, password)
	case "hamqth":
		p = lookup.NewHamQTH(user, password)
	default:
		return lookup.Result{}, fmt.Errorf("unknown provider %q", name)
	}
	r, err := p.Lookup(a.ctx, callsign)
	if errors.Is(err, lookup.ErrNotFound) {
		return lookup.Result{}, fmt.Errorf("%s reachable but %q not found (creds look OK)", name, callsign)
	}
	if err != nil {
		return lookup.Result{}, err
	}
	r.Source = name
	return r, nil
}

// --- CAT bindings ---

// GetCATSettings returns the stored CAT configuration (defaults applied).
func (a *App) GetCATSettings() (CATSettings, error) {
	if a.settings == nil {
		return CATSettings{Backend: "omnirig", OmniRigNum: 1, PollMs: 250}, fmt.Errorf("db not initialized")
	}
	m, err := a.settings.GetMany(a.ctx, keyCATEnabled, keyCATBackend, keyCATOmniRigNum, keyCATPollMs, keyCATDelayMs, keyCATDigitalDefault)
	if err != nil {
		return CATSettings{}, err
	}
	out := CATSettings{
		Enabled:        m[keyCATEnabled] == "1",
		Backend:        m[keyCATBackend],
		OmniRigNum:     1,
		PollMs:         250,
		DelayMs:        0,
		DigitalDefault: m[keyCATDigitalDefault],
	}
	if out.Backend == "" {
		out.Backend = "omnirig"
	}
	if out.DigitalDefault == "" {
		out.DigitalDefault = "FT8"
	}
	if n, _ := strconv.Atoi(m[keyCATOmniRigNum]); n == 1 || n == 2 {
		out.OmniRigNum = n
	}
	if n, _ := strconv.Atoi(m[keyCATPollMs]); n >= 50 && n <= 2000 {
		out.PollMs = n
	}
	if n, _ := strconv.Atoi(m[keyCATDelayMs]); n >= 0 && n <= 500 {
		out.DelayMs = n
	}
	return out, nil
}

// SaveCATSettings persists CAT config and restarts the manager accordingly.
func (a *App) SaveCATSettings(s CATSettings) error {
	if a.settings == nil {
		return fmt.Errorf("db not initialized")
	}
	if s.Backend == "" {
		s.Backend = "omnirig"
	}
	if s.OmniRigNum != 1 && s.OmniRigNum != 2 {
		s.OmniRigNum = 1
	}
	if s.PollMs < 50 || s.PollMs > 2000 {
		s.PollMs = 250
	}
	if s.DelayMs < 0 || s.DelayMs > 500 {
		s.DelayMs = 0
	}
	enabled := "0"
	if s.Enabled {
		enabled = "1"
	}
	if s.DigitalDefault == "" {
		s.DigitalDefault = "FT8"
	}
	for k, v := range map[string]string{
		keyCATEnabled:        enabled,
		keyCATBackend:        s.Backend,
		keyCATOmniRigNum:     strconv.Itoa(s.OmniRigNum),
		keyCATPollMs:         strconv.Itoa(s.PollMs),
		keyCATDelayMs:        strconv.Itoa(s.DelayMs),
		keyCATDigitalDefault: strings.ToUpper(strings.TrimSpace(s.DigitalDefault)),
	} {
		if err := a.settings.Set(a.ctx, k, v); err != nil {
			return err
		}
	}
	a.reloadCAT()
	return nil
}

// ── Operating conditions ───────────────────────────────────────────────

// ListOperatingTree returns the stations/antennas/bands tree for the
// active profile. The UI renders the Settings tree from this.
func (a *App) ListOperatingTree() ([]operating.Station, error) {
	if a.operating == nil || a.profiles == nil {
		return nil, fmt.Errorf("db not initialized")
	}
	p, err := a.profiles.Active(a.ctx)
	if err != nil {
		return nil, err
	}
	return a.operating.ListTree(a.ctx, p.ID)
}

// SaveOperatingStation upserts a station. profile_id is set from the
// active profile if zero so the frontend doesn't have to know about it.
func (a *App) SaveOperatingStation(s operating.Station) (operating.Station, error) {
	if a.operating == nil || a.profiles == nil {
		return s, fmt.Errorf("db not initialized")
	}
	if s.ProfileID == 0 {
		p, err := a.profiles.Active(a.ctx)
		if err != nil {
			return s, err
		}
		s.ProfileID = p.ID
	}
	if err := a.operating.SaveStation(a.ctx, &s); err != nil {
		return s, err
	}
	return s, nil
}

// DeleteOperatingStation cascades to antennas + bands.
func (a *App) DeleteOperatingStation(id int64) error {
	if a.operating == nil {
		return fmt.Errorf("db not initialized")
	}
	return a.operating.DeleteStation(a.ctx, id)
}

// SaveOperatingAntenna upserts an antenna and replaces its band list.
// Setting is_default on a band clears the flag from any other antenna
// on the same band within this profile.
func (a *App) SaveOperatingAntenna(ant operating.Antenna) (operating.Antenna, error) {
	if a.operating == nil {
		return ant, fmt.Errorf("db not initialized")
	}
	if err := a.operating.SaveAntenna(a.ctx, &ant); err != nil {
		return ant, err
	}
	return ant, nil
}

// DeleteOperatingAntenna cascades to bands.
func (a *App) DeleteOperatingAntenna(id int64) error {
	if a.operating == nil {
		return fmt.Errorf("db not initialized")
	}
	return a.operating.DeleteAntenna(a.ctx, id)
}

// OperatingDefaultForBand returns the (station, antenna) flagged default
// for `band` in the active profile. Used by the entry strip to auto-fill
// MY_RIG and MY_ANTENNA when the user picks a band.
func (a *App) OperatingDefaultForBand(band string) (operating.BandDefault, error) {
	if a.operating == nil || a.profiles == nil {
		return operating.BandDefault{}, fmt.Errorf("db not initialized")
	}
	p, err := a.profiles.Active(a.ctx)
	if err != nil {
		return operating.BandDefault{}, err
	}
	d, _, err := a.operating.BandDefault(a.ctx, p.ID, band)
	return d, err
}

// ── Backup ──────────────────────────────────────────────────────────────

// BackupSettings is the user-tweakable database backup configuration.
type BackupSettings struct {
	Enabled      bool   `json:"enabled"`
	Folder       string `json:"folder"`
	Rotation     int    `json:"rotation"`
	Zip          bool   `json:"zip"`
	LastBackupAt string `json:"last_backup_at"`
	DefaultFolder string `json:"default_folder"` // computed, read-only — shown as a hint
}

// GetBackupSettings returns stored backup config with safe defaults.
func (a *App) GetBackupSettings() (BackupSettings, error) {
	out := BackupSettings{
		Rotation:      5,
		DefaultFolder: backup.DefaultFolder(filepath.Dir(a.dbPath)),
	}
	if a.settings == nil {
		return out, nil
	}
	m, err := a.settings.GetMany(a.ctx,
		keyBackupEnabled, keyBackupFolder, keyBackupRotation, keyBackupZip, keyBackupLast)
	if err != nil {
		return out, err
	}
	out.Enabled = m[keyBackupEnabled] == "1"
	out.Folder = m[keyBackupFolder]
	if n, _ := strconv.Atoi(m[keyBackupRotation]); n > 0 {
		out.Rotation = n
	}
	out.Zip = m[keyBackupZip] == "1"
	out.LastBackupAt = m[keyBackupLast]
	return out, nil
}

// SaveBackupSettings persists backup config (no immediate backup —
// trigger it explicitly with RunBackupNow).
func (a *App) SaveBackupSettings(s BackupSettings) error {
	if a.settings == nil {
		return fmt.Errorf("db not initialized")
	}
	if s.Rotation <= 0 {
		s.Rotation = 5
	}
	enabled := "0"
	if s.Enabled {
		enabled = "1"
	}
	doZip := "0"
	if s.Zip {
		doZip = "1"
	}
	for k, v := range map[string]string{
		keyBackupEnabled:  enabled,
		keyBackupFolder:   strings.TrimSpace(s.Folder),
		keyBackupRotation: strconv.Itoa(s.Rotation),
		keyBackupZip:      doZip,
	} {
		if err := a.settings.Set(a.ctx, k, v); err != nil {
			return err
		}
	}
	return nil
}

// RunBackupNow forces an immediate backup using the persisted settings.
// Returns the destination path of the file that was written.
func (a *App) RunBackupNow() (string, error) {
	s, err := a.GetBackupSettings()
	if err != nil {
		return "", err
	}
	folder := s.Folder
	if folder == "" {
		folder = s.DefaultFolder
	}
	path, err := backup.Run(a.ctx, a.db, a.dbPath, folder, s.Rotation, s.Zip)
	if err != nil {
		return path, err
	}
	_ = a.settings.Set(a.ctx, keyBackupLast, time.Now().UTC().Format(time.RFC3339))
	return path, nil
}

// maybeShutdownBackup runs a backup at shutdown if the user enabled it
// and no backup for today already exists. Running at shutdown (not at
// startup) means the snapshot includes the QSOs the user just logged
// this session — exactly what we want to protect. Errors are printed
// but never block the close.
func (a *App) maybeShutdownBackup() {
	if a.settings == nil || a.db == nil {
		return
	}
	s, err := a.GetBackupSettings()
	if err != nil || !s.Enabled {
		return
	}
	folder := s.Folder
	if folder == "" {
		folder = s.DefaultFolder
	}
	if backup.HasBackupToday(folder) {
		return
	}
	if _, err := backup.Run(a.ctx, a.db, a.dbPath, folder, s.Rotation, s.Zip); err != nil {
		fmt.Println("HamLog: shutdown backup failed:", err)
		return
	}
	_ = a.settings.Set(a.ctx, keyBackupLast, time.Now().UTC().Format(time.RFC3339))
}

// PickBackupFolder opens a native directory picker so the user can browse
// to a backup target rather than typing the path. Returns the absolute
// path (or empty string if the dialog was cancelled).
//
// Windows' shell dialog refuses to open when DefaultDirectory points at
// a path that doesn't exist yet (typical for our default backups folder
// on first launch). We walk up the path until we find an existing
// ancestor and use that as the dialog's starting point.
func (a *App) PickBackupFolder() (string, error) {
	if a.ctx == nil {
		return "", fmt.Errorf("no app context")
	}
	current, _ := a.GetBackupSettings()
	defaultDir := current.Folder
	if defaultDir == "" {
		defaultDir = current.DefaultFolder
	}
	defaultDir = firstExistingAncestor(defaultDir)
	return wruntime.OpenDirectoryDialog(a.ctx, wruntime.OpenDialogOptions{
		Title:            "Pick a folder for HamLog backups",
		DefaultDirectory: defaultDir,
	})
}

// firstExistingAncestor returns p if it exists, otherwise the closest
// parent directory that does. Returns "" if nothing valid is found (the
// dialog then opens at the OS default location).
func firstExistingAncestor(p string) string {
	p = strings.TrimSpace(p)
	for p != "" {
		if st, err := os.Stat(p); err == nil && st.IsDir() {
			return p
		}
		parent := filepath.Dir(p)
		if parent == p {
			break
		}
		p = parent
	}
	return ""
}

// GetCATState returns the current snapshot from the CAT manager. Used by the
// frontend on mount before any cat:state event has been emitted.
func (a *App) GetCATState() cat.RigState {
	if a.cat == nil {
		return cat.RigState{}
	}
	return a.cat.State()
}

// SetCATFrequency lets the frontend push a freq to the rig (cluster click,
// memory recall, …). Returns an error if CAT isn't running or the backend
// refuses (out-of-range, etc.).
func (a *App) SetCATFrequency(hz int64) error {
	if a.cat == nil {
		return fmt.Errorf("cat not initialized")
	}
	return a.cat.SetFrequency(hz)
}

// SetCATMode sets the rig's mode. ADIF mode names (SSB / CW / FT8 / …) are
// translated to backend-specific values by the backend itself.
func (a *App) SetCATMode(mode string) error {
	if a.cat == nil {
		return fmt.Errorf("cat not initialized")
	}
	return a.cat.SetMode(mode)
}

// SwitchCATRig hot-swaps the active OmniRig slot (Rig1 ↔ Rig2) without
// requiring a trip through the full Settings panel. Persists the choice
// so it survives restart.
func (a *App) SwitchCATRig(n int) error {
	if n != 1 && n != 2 {
		return fmt.Errorf("rig num must be 1 or 2, got %d", n)
	}
	if a.settings == nil {
		return fmt.Errorf("db not initialized")
	}
	if err := a.settings.Set(a.ctx, keyCATOmniRigNum, strconv.Itoa(n)); err != nil {
		return err
	}
	a.reloadCAT()
	return nil
}

// reloadCAT (re)starts the CAT manager based on the current settings.
// Called at startup and after the user saves new CAT config.
func (a *App) reloadCAT() {
	if a.cat == nil {
		return
	}
	s, err := a.GetCATSettings()
	if err != nil {
		return
	}
	a.cat.SetPollInterval(time.Duration(s.PollMs) * time.Millisecond)
	a.cat.SetCommandDelay(time.Duration(s.DelayMs) * time.Millisecond)
	if !s.Enabled {
		a.cat.Stop()
		return
	}
	switch s.Backend {
	case "omnirig":
		// No explicit launch — COM auto-activates OmniRig.exe via its
		// LocalServer32 registration when we CreateObject in Connect().
		// Spawning OmniRig.exe ourselves (even with /Embedding) on every
		// reloadCAT raised the existing instance's window to the front,
		// which is what Log4OM avoids by relying entirely on COM activation.
		a.cat.Start(cat.NewOmniRig(s.OmniRigNum))
	default:
		// Unknown backend → stop and emit a dummy state so the UI shows it.
		a.cat.Stop()
	}
}

// ClearLookupCache empties the local callsign cache.
func (a *App) ClearLookupCache() error {
	if a.cache == nil {
		return fmt.Errorf("cache not initialized")
	}
	return a.cache.Clear(a.ctx)
}

// CtyDatInfo describes the currently-loaded cty.dat file (or zero values
// if it hasn't been loaded yet). Exposed for the Maintenance menu so the
// user can see what they're working with before triggering a refresh.
type CtyDatInfo struct {
	Path         string `json:"path"`
	Entities     int    `json:"entities"`
	LoadedAt     string `json:"loaded_at,omitempty"`     // RFC3339, "" if not loaded
	FileModTime  string `json:"file_mod_time,omitempty"` // RFC3339, "" if missing
}

// GetCtyDatInfo returns metadata about the on-disk cty.dat.
func (a *App) GetCtyDatInfo() CtyDatInfo {
	if a.dxcc == nil {
		return CtyDatInfo{}
	}
	src := a.dxcc.Info()
	out := CtyDatInfo{Path: src.Path, Entities: src.Entities}
	if !src.LoadedAt.IsZero() {
		out.LoadedAt = src.LoadedAt.UTC().Format(time.RFC3339)
	}
	if !src.FileModTime.IsZero() {
		out.FileModTime = src.FileModTime.UTC().Format(time.RFC3339)
	}
	return out
}

// RefreshCtyDat re-downloads cty.dat from country-files.com and reloads it
// into memory. Synchronous so the UI can show a spinner; ~1s typical.
func (a *App) RefreshCtyDat() (CtyDatInfo, error) {
	if a.dxcc == nil {
		return CtyDatInfo{}, fmt.Errorf("dxcc manager not initialized")
	}
	if err := a.dxcc.Refresh(a.ctx); err != nil {
		return CtyDatInfo{}, err
	}
	return a.GetCtyDatInfo(), nil
}

// --- Station bindings ---
//
// GetStationSettings/SaveStationSettings now operate on the **currently
// active profile** rather than a flat settings key set. Kept for the
// existing topbar/quick-edit code paths; the full profile CRUD lives in
// the Profile bindings below.

func (a *App) GetStationSettings() (StationSettings, error) {
	if a.profiles == nil {
		return StationSettings{}, fmt.Errorf("profiles not initialized")
	}
	p, err := a.profiles.Active(a.ctx)
	if err != nil {
		return StationSettings{}, err
	}
	return StationSettings{
		Callsign:  p.Callsign,
		Operator:  p.Operator,
		MyGrid:    p.MyGrid,
		MyCountry: p.MyCountry,
		MySOTARef: p.MySOTARef,
		MyPOTARef: p.MyPOTARef,
	}, nil
}

// --- Lists bindings (bands + modes with default RST) ---

// GetListsSettings returns the user-customisable lists. Defaults are
// returned when the user has not customised anything.
func (a *App) GetListsSettings() (ListsSettings, error) {
	if a.settings == nil {
		return ListsSettings{Bands: defaultBands, Modes: defaultModes}, fmt.Errorf("db not initialized")
	}
	out := ListsSettings{}
	if raw, _ := a.settings.Get(a.ctx, keyListsBands); raw != "" {
		_ = json.Unmarshal([]byte(raw), &out.Bands)
	}
	if raw, _ := a.settings.Get(a.ctx, keyListsModes); raw != "" {
		_ = json.Unmarshal([]byte(raw), &out.Modes)
	}
	if len(out.Bands) == 0 {
		out.Bands = append([]string(nil), defaultBands...)
	}
	if len(out.Modes) == 0 {
		out.Modes = append([]ModePreset(nil), defaultModes...)
	}
	return out, nil
}

// SaveListsSettings persists the user-customised lists.
func (a *App) SaveListsSettings(l ListsSettings) error {
	if a.settings == nil {
		return fmt.Errorf("db not initialized")
	}
	b, err := json.Marshal(l.Bands)
	if err != nil {
		return err
	}
	if err := a.settings.Set(a.ctx, keyListsBands, string(b)); err != nil {
		return err
	}
	m, err := json.Marshal(l.Modes)
	if err != nil {
		return err
	}
	return a.settings.Set(a.ctx, keyListsModes, string(m))
}

// SaveStationSettings updates only the six "basic" fields on the active
// profile. Use the Profile bindings (ListProfiles / SaveProfile…) for
// full multi-profile management.
func (a *App) SaveStationSettings(s StationSettings) error {
	if a.profiles == nil {
		return fmt.Errorf("profiles not initialized")
	}
	p, err := a.profiles.Active(a.ctx)
	if err != nil {
		return err
	}
	p.Callsign = s.Callsign
	p.Operator = s.Operator
	p.MyGrid = s.MyGrid
	p.MyCountry = s.MyCountry
	p.MySOTARef = s.MySOTARef
	p.MyPOTARef = s.MyPOTARef
	return a.profiles.Save(a.ctx, &p)
}

// --- Profile bindings (multi-profile CRUD) ---

// ListProfiles returns every saved profile, active first.
func (a *App) ListProfiles() ([]profile.Profile, error) {
	if a.profiles == nil {
		return nil, fmt.Errorf("profiles not initialized")
	}
	return a.profiles.List(a.ctx)
}

// GetActiveProfile returns the currently-selected profile.
func (a *App) GetActiveProfile() (profile.Profile, error) {
	if a.profiles == nil {
		return profile.Profile{}, fmt.Errorf("profiles not initialized")
	}
	return a.profiles.Active(a.ctx)
}

// SaveProfile upserts a profile. Pass id=0 to create a new one.
func (a *App) SaveProfile(p profile.Profile) (profile.Profile, error) {
	if a.profiles == nil {
		return profile.Profile{}, fmt.Errorf("profiles not initialized")
	}
	if err := a.profiles.Save(a.ctx, &p); err != nil {
		return profile.Profile{}, err
	}
	a.refreshOperatorGrid()
	return p, nil
}

// DeleteProfile removes a profile. Refuses to delete the last remaining
// profile; promotes another to active if the deleted one was selected.
func (a *App) DeleteProfile(id int64) error {
	if a.profiles == nil {
		return fmt.Errorf("profiles not initialized")
	}
	return a.profiles.Delete(a.ctx, id)
}

// ActivateProfile switches the selected profile. Subsequent QSOs stamp
// MY_* fields from this one.
func (a *App) ActivateProfile(id int64) error {
	if a.profiles == nil {
		return fmt.Errorf("profiles not initialized")
	}
	if err := a.profiles.SetActive(a.ctx, id); err != nil {
		return err
	}
	a.refreshOperatorGrid()
	return nil
}

// DuplicateProfile clones an existing profile under newName. Useful when
// the user has a "Home" profile and wants to derive "Portable" from it
// without retyping every field.
func (a *App) DuplicateProfile(id int64, newName string) (profile.Profile, error) {
	if a.profiles == nil {
		return profile.Profile{}, fmt.Errorf("profiles not initialized")
	}
	return a.profiles.Duplicate(a.ctx, id, newName)
}

// --- Rotator bindings (PstRotator UDP v0) ---

// RotatorSettings is the JSON shape for the Hardware → Rotator panel.
type RotatorSettings struct {
	Enabled       bool   `json:"enabled"`
	Host          string `json:"host"`            // default 127.0.0.1
	Port          int    `json:"port"`            // default 12000
	HasElevation  bool   `json:"has_elevation"`   // include EL in GoTo packets
}

// GetRotatorSettings returns the persisted rotator config with defaults.
func (a *App) GetRotatorSettings() (RotatorSettings, error) {
	out := RotatorSettings{Host: "127.0.0.1", Port: 12000}
	if a.settings == nil {
		return out, fmt.Errorf("db not initialized")
	}
	m, err := a.settings.GetMany(a.ctx,
		keyRotatorEnabled, keyRotatorHost, keyRotatorPort, keyRotatorHasElevation)
	if err != nil {
		return out, err
	}
	out.Enabled = m[keyRotatorEnabled] == "1"
	if h := m[keyRotatorHost]; h != "" {
		out.Host = h
	}
	if p, _ := strconv.Atoi(m[keyRotatorPort]); p > 0 && p <= 65535 {
		out.Port = p
	}
	out.HasElevation = m[keyRotatorHasElevation] == "1"
	return out, nil
}

// SaveRotatorSettings persists the rotator config. Connection is per-call
// (UDP, no socket to (re)open) so no reload step is needed.
func (a *App) SaveRotatorSettings(s RotatorSettings) error {
	if a.settings == nil {
		return fmt.Errorf("db not initialized")
	}
	if s.Host == "" {
		s.Host = "127.0.0.1"
	}
	if s.Port <= 0 || s.Port > 65535 {
		s.Port = 12000
	}
	for k, v := range map[string]string{
		keyRotatorEnabled:      boolStr(s.Enabled),
		keyRotatorHost:         s.Host,
		keyRotatorPort:         strconv.Itoa(s.Port),
		keyRotatorHasElevation: boolStr(s.HasElevation),
	} {
		if err := a.settings.Set(a.ctx, k, v); err != nil {
			return err
		}
	}
	return nil
}

// rotatorClient returns a fresh PST UDP client built from current settings,
// or an error if the rotator is disabled / misconfigured.
func (a *App) rotatorClient() (*pst.Client, RotatorSettings, error) {
	s, err := a.GetRotatorSettings()
	if err != nil {
		return nil, s, err
	}
	if !s.Enabled {
		return nil, s, fmt.Errorf("rotator disabled in settings")
	}
	return pst.New(s.Host, s.Port), s, nil
}

// RotatorGoTo points the antenna at the given azimuth (and optional
// elevation if the rotator is configured for it).
func (a *App) RotatorGoTo(az int, el int) error {
	c, s, err := a.rotatorClient()
	if err != nil {
		return err
	}
	return c.GoTo(az, s.HasElevation, el)
}

// RotatorStop interrupts any in-progress rotation.
func (a *App) RotatorStop() error {
	c, _, err := a.rotatorClient()
	if err != nil {
		return err
	}
	return c.Stop()
}

// RotatorPark moves the antenna to its parked position (configured in
// PstRotator itself).
func (a *App) RotatorPark() error {
	c, _, err := a.rotatorClient()
	if err != nil {
		return err
	}
	return c.Park()
}

// TestRotator sends a no-op GoTo to the rotator's current heading to
// verify the UDP link without actually moving the antenna. We use 0° as
// the test target — pick a known direction the user expects to see.
// Returns nil on success or a descriptive error.
func (a *App) TestRotator(s RotatorSettings) error {
	if s.Host == "" {
		s.Host = "127.0.0.1"
	}
	if s.Port <= 0 || s.Port > 65535 {
		s.Port = 12000
	}
	return pst.New(s.Host, s.Port).GoTo(0, false, -1)
}

func boolStr(b bool) string {
	if b {
		return "1"
	}
	return "0"
}

// --- DX Cluster bindings (multi-server) ---

// resolveClusterLogin returns the login callsign for a server: explicit
// override on the row, else the active profile's callsign.
func (a *App) resolveClusterLogin(override string) string {
	if override != "" {
		return strings.ToUpper(strings.TrimSpace(override))
	}
	if a.profiles != nil {
		if p, err := a.profiles.Active(a.ctx); err == nil {
			return strings.ToUpper(strings.TrimSpace(p.Callsign))
		}
	}
	return ""
}

// clusterAutoConnect reads the global "auto-connect on startup" toggle.
// Stored in settings (key/value) since it's a single bool, not per-row.
func (a *App) clusterAutoConnect() (bool, error) {
	if a.settings == nil {
		return false, fmt.Errorf("db not initialized")
	}
	v, err := a.settings.Get(a.ctx, keyClusterAutoConnect)
	if err != nil {
		return false, err
	}
	return v == "1", nil
}

// startAllEnabledClusters opens a session for every enabled server.
func (a *App) startAllEnabledClusters() {
	servers, err := a.listClusterServers()
	if err != nil {
		fmt.Println("HamLog: list cluster servers:", err)
		return
	}
	for _, s := range servers {
		if s.Enabled {
			a.cluster.StartServer(s, a.resolveClusterLogin(s.LoginOverride))
		}
	}
}

// listClusterServers reads the cluster_servers table ordered for display
// (sort_order asc, id asc). The first row with Enabled=true is the master.
func (a *App) listClusterServers() ([]cluster.ServerConfig, error) {
	if a.db == nil {
		return nil, fmt.Errorf("db not initialized")
	}
	rows, err := a.db.QueryContext(a.ctx, `
		SELECT id, name, host, port, login_override, password, init_commands, enabled, sort_order
		FROM cluster_servers
		ORDER BY sort_order ASC, id ASC`)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []cluster.ServerConfig
	for rows.Next() {
		var s cluster.ServerConfig
		var enabled int
		if err := rows.Scan(&s.ID, &s.Name, &s.Host, &s.Port, &s.LoginOverride,
			&s.Password, &s.InitCommands, &enabled, &s.SortOrder); err != nil {
			return nil, err
		}
		s.Enabled = enabled == 1
		out = append(out, s)
	}
	return out, rows.Err()
}

// ListClusterServers returns all saved cluster nodes.
func (a *App) ListClusterServers() ([]cluster.ServerConfig, error) {
	return a.listClusterServers()
}

// SaveClusterServer upserts one row. id=0 inserts a new server. Restarts
// the session if the row was already running (so config edits take effect
// immediately).
func (a *App) SaveClusterServer(s cluster.ServerConfig) (cluster.ServerConfig, error) {
	if a.db == nil {
		return cluster.ServerConfig{}, fmt.Errorf("db not initialized")
	}
	if strings.TrimSpace(s.Name) == "" {
		return cluster.ServerConfig{}, fmt.Errorf("server name required")
	}
	if s.Port <= 0 || s.Port > 65535 {
		s.Port = 7300
	}
	now := time.Now().UTC().Format("2006-01-02T15:04:05.000Z")
	enabled := 0
	if s.Enabled {
		enabled = 1
	}
	if s.ID == 0 {
		res, err := a.db.ExecContext(a.ctx, `
			INSERT INTO cluster_servers
			    (name, host, port, login_override, password, init_commands, enabled, sort_order, created_at, updated_at)
			VALUES(?,?,?,?,?,?,?,?,?,?)`,
			s.Name, s.Host, s.Port, s.LoginOverride, s.Password, s.InitCommands, enabled, s.SortOrder, now, now)
		if err != nil {
			return cluster.ServerConfig{}, err
		}
		id, _ := res.LastInsertId()
		s.ID = id
	} else {
		_, err := a.db.ExecContext(a.ctx, `
			UPDATE cluster_servers SET name=?, host=?, port=?, login_override=?, password=?,
			    init_commands=?, enabled=?, sort_order=?, updated_at=?
			WHERE id=?`,
			s.Name, s.Host, s.Port, s.LoginOverride, s.Password, s.InitCommands, enabled, s.SortOrder, now, s.ID)
		if err != nil {
			return cluster.ServerConfig{}, err
		}
	}
	// Apply runtime change: stop and restart if enabled, else just stop.
	a.cluster.StopServer(s.ID)
	if s.Enabled {
		a.cluster.StartServer(s, a.resolveClusterLogin(s.LoginOverride))
	}
	return s, nil
}

// DeleteClusterServer drops a row and closes its session.
func (a *App) DeleteClusterServer(id int64) error {
	if a.db == nil {
		return fmt.Errorf("db not initialized")
	}
	a.cluster.StopServer(id)
	_, err := a.db.ExecContext(a.ctx, `DELETE FROM cluster_servers WHERE id=?`, id)
	return err
}

// SetClusterAutoConnect persists the global auto-connect toggle.
func (a *App) SetClusterAutoConnect(on bool) error {
	if a.settings == nil {
		return fmt.Errorf("db not initialized")
	}
	return a.settings.Set(a.ctx, keyClusterAutoConnect, boolStr(on))
}

// GetClusterAutoConnect reads the persisted toggle.
func (a *App) GetClusterAutoConnect() (bool, error) {
	return a.clusterAutoConnect()
}

// ConnectClusterServer opens a session for one specific saved server.
func (a *App) ConnectClusterServer(id int64) error {
	if a.cluster == nil {
		return fmt.Errorf("cluster not initialized")
	}
	servers, err := a.listClusterServers()
	if err != nil {
		return err
	}
	for _, s := range servers {
		if s.ID == id {
			if !s.Enabled {
				return fmt.Errorf("server %q is disabled — enable it first", s.Name)
			}
			a.cluster.StartServer(s, a.resolveClusterLogin(s.LoginOverride))
			return nil
		}
	}
	return fmt.Errorf("no saved server with id %d", id)
}

// DisconnectClusterServer closes the session for one server.
func (a *App) DisconnectClusterServer(id int64) error {
	if a.cluster == nil {
		return fmt.Errorf("cluster not initialized")
	}
	a.cluster.StopServer(id)
	return nil
}

// ConnectAllClusters opens sessions for every enabled server.
func (a *App) ConnectAllClusters() error {
	if a.cluster == nil {
		return fmt.Errorf("cluster not initialized")
	}
	a.startAllEnabledClusters()
	return nil
}

// DisconnectAllClusters closes every running session.
func (a *App) DisconnectAllClusters() error {
	if a.cluster == nil {
		return fmt.Errorf("cluster not initialized")
	}
	a.cluster.StopAll()
	return nil
}

// SendClusterCommand writes `cmd` to the **master** cluster — the first
// enabled server by sort_order. Returns an error if the master is not
// currently connected (the UI should grey the input out in that case).
func (a *App) SendClusterCommand(cmd string) error {
	if a.cluster == nil {
		return fmt.Errorf("cluster not initialized")
	}
	cmd = strings.TrimSpace(cmd)
	if cmd == "" {
		return fmt.Errorf("empty command")
	}
	servers, err := a.listClusterServers()
	if err != nil {
		return err
	}
	for _, s := range servers {
		if s.Enabled {
			return a.cluster.SendCommand(s.ID, cmd)
		}
	}
	return fmt.Errorf("no enabled cluster server to send to")
}

// GetClusterStatus returns a snapshot of every active session. Used by
// the UI on mount and to hydrate after a `cluster:state` event.
func (a *App) GetClusterStatus() []cluster.ServerStatus {
	if a.cluster == nil {
		return nil
	}
	return a.cluster.Status()
}

// SpotQuery is one (call, band, mode) tuple sent for status colouring.
type SpotQuery struct {
	Call string `json:"call"`
	Band string `json:"band"`
	Mode string `json:"mode"`
}

// SpotStatus is the per-tuple result. Status is one of:
//
//	"new"        — entity never worked
//	"new-band"   — entity worked but never on this band
//	"new-slot"   — entity worked on this band but not in this mode
//	"worked"     — exact band+mode already in the log
//	""           — couldn't resolve the entity (no cty.dat match)
type SpotStatus struct {
	Call      string `json:"call"`
	Band      string `json:"band"`
	Mode      string `json:"mode"`
	Country   string `json:"country,omitempty"`
	Continent string `json:"continent,omitempty"`
	Status    string `json:"status"`
	// WorkedCall is true when this exact callsign exists in the log
	// (any band, any mode). Drives the per-call text highlight, in
	// addition to the entity-level Status (NEW / NEW BAND / …).
	WorkedCall bool `json:"worked_call"`
}

// ClusterSpotStatuses takes a batch of spots and returns slot status for
// each. Used by the Cluster tab to color rows (NEW / NEW BAND / NEW SLOT
// / WORKED). One cty.dat lookup + one DB scan, regardless of batch size.
//
// Mode handling: when the caller passes an empty Mode (cluster comment
// was ambiguous and the frontend couldn't infer) we degrade gracefully
// to band-only — saying "worked" rather than wrongly flagging "new-slot"
// just because we don't know the mode.
func (a *App) ClusterSpotStatuses(spots []SpotQuery) []SpotStatus {
	out := make([]SpotStatus, len(spots))
	if a.qso == nil {
		return out
	}
	// Pass a cty.dat-backed resolver so the past-QSO map uses the SAME
	// entity name we'll compare each spot against. Without it QRZ-stored
	// "Turkey" wouldn't match cty.dat's "Asiatic Turkey" → false NEW.
	resolveEntity := func(callsign string) string {
		if a.dxcc == nil {
			return ""
		}
		m, ok := a.dxcc.Lookup(callsign)
		if !ok || m.Entity == nil {
			return ""
		}
		return m.Entity.Name
	}
	entities, err := a.qso.EntitySlotMap(a.ctx, resolveEntity)
	if err != nil {
		return out
	}
	// Per-call worked set — separate from the entity check so we can flag
	// "I've already QSO'd this exact station" even when the band/mode
	// makes the entity check say "new-band" or "new-slot".
	workedCalls, _ := a.qso.WorkedCallsigns(a.ctx)
	for i, q := range spots {
		out[i] = SpotStatus{
			Call: q.Call,
			Band: strings.ToLower(q.Band),
			Mode: strings.ToUpper(q.Mode),
		}
		if _, ok := workedCalls[strings.ToUpper(q.Call)]; ok {
			out[i].WorkedCall = true
		}
		if a.dxcc == nil {
			continue
		}
		m, ok := a.dxcc.Lookup(q.Call)
		if !ok || m.Entity == nil {
			continue
		}
		country := strings.ToLower(m.Entity.Name)
		out[i].Country = m.Entity.Name
		out[i].Continent = m.Continent
		e, worked := entities[country]
		if !worked {
			out[i].Status = "new"
			continue
		}
		if _, b := e.Bands[out[i].Band]; !b {
			out[i].Status = "new-band"
			continue
		}
		// Without a mode we can't distinguish "new slot" from "worked";
		// the safer default is "worked" so we never falsely claim "new".
		if out[i].Mode == "" {
			out[i].Status = "worked"
			continue
		}
		if _, ok := e.Slots[out[i].Band][out[i].Mode]; !ok {
			out[i].Status = "new-slot"
			continue
		}
		out[i].Status = "worked"
	}
	return out
}