package api

import (
	"encoding/json"
	"log"
	"net/http"
	"strconv"

	"git.rouggy.com/rouggy/ShackMaster/internal/config"
	"github.com/gorilla/websocket"
)

type Server struct {
	deviceManager *DeviceManager
	hub           *Hub
	config        *config.Config
	upgrader      websocket.Upgrader
}

func NewServer(dm *DeviceManager, hub *Hub, cfg *config.Config) *Server {
	return &Server{
		deviceManager: dm,
		hub:           hub,
		config:        cfg,
		upgrader: websocket.Upgrader{
			ReadBufferSize:  1024,
			WriteBufferSize: 1024,
			CheckOrigin: func(r *http.Request) bool {
				return true // Allow all origins for now
			},
		},
	}
}

func (s *Server) SetupRoutes() *http.ServeMux {
	mux := http.NewServeMux()

	// WebSocket endpoint
	mux.HandleFunc("/ws", s.handleWebSocket)

	// REST API endpoints
	mux.HandleFunc("/api/status", s.handleGetStatus)
	mux.HandleFunc("/api/config", s.handleGetConfig)

	// WebSwitch endpoints
	mux.HandleFunc("/api/webswitch/relay/on", s.handleWebSwitchRelayOn)
	mux.HandleFunc("/api/webswitch/relay/off", s.handleWebSwitchRelayOff)
	mux.HandleFunc("/api/webswitch/all/on", s.handleWebSwitchAllOn)
	mux.HandleFunc("/api/webswitch/all/off", s.handleWebSwitchAllOff)

	// Rotator endpoints
	mux.HandleFunc("/api/rotator/heading", s.handleRotatorHeading)
	mux.HandleFunc("/api/rotator/cw", s.handleRotatorCW)
	mux.HandleFunc("/api/rotator/ccw", s.handleRotatorCCW)
	mux.HandleFunc("/api/rotator/stop", s.handleRotatorStop)

	// Ultrabeam endpoints
	mux.HandleFunc("/api/ultrabeam/frequency", s.handleUltrabeamFrequency)
	mux.HandleFunc("/api/ultrabeam/retract", s.handleUltrabeamRetract)
	mux.HandleFunc("/api/ultrabeam/autotrack", s.handleUltrabeamAutoTrack)

	// Tuner endpoints
	mux.HandleFunc("/api/tuner/operate", s.handleTunerOperate)
	mux.HandleFunc("/api/tuner/bypass", s.handleTunerBypass)
	mux.HandleFunc("/api/tuner/autotune", s.handleTunerAutoTune)

	// Antenna Genius endpoints
	mux.HandleFunc("/api/antenna/select", s.handleAntennaSelect)
	mux.HandleFunc("/api/antenna/reboot", s.handleAntennaReboot)

	// Power Genius endpoints
	mux.HandleFunc("/api/power/fanmode", s.handlePowerFanMode)
	mux.HandleFunc("/api/power/operate", s.handlePowerOperate)

	// Note: Static files are now served from embedded FS in main.go

	return mux
}

func (s *Server) handleWebSocket(w http.ResponseWriter, r *http.Request) {
	conn, err := s.upgrader.Upgrade(w, r, nil)
	if err != nil {
		log.Printf("WebSocket upgrade error: %v", err)
		return
	}

	ServeWs(s.hub, conn)
}

func (s *Server) handleGetStatus(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	status := s.deviceManager.GetStatus()
	s.sendJSON(w, status)
}

func (s *Server) handleGetConfig(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	// Only send public config info (not API keys)
	configInfo := map[string]interface{}{
		"callsign": s.config.Location.Callsign,
		"location": map[string]float64{
			"latitude":  s.config.Location.Latitude,
			"longitude": s.config.Location.Longitude,
		},
	}

	s.sendJSON(w, configInfo)
}

// WebSwitch handlers
func (s *Server) handleWebSwitchRelayOn(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	relay, err := strconv.Atoi(r.URL.Query().Get("relay"))
	if err != nil || relay < 1 || relay > 5 {
		http.Error(w, "Invalid relay number", http.StatusBadRequest)
		return
	}

	if err := s.deviceManager.WebSwitch().TurnOn(relay); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleWebSwitchRelayOff(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	relay, err := strconv.Atoi(r.URL.Query().Get("relay"))
	if err != nil || relay < 1 || relay > 5 {
		http.Error(w, "Invalid relay number", http.StatusBadRequest)
		return
	}

	if err := s.deviceManager.WebSwitch().TurnOff(relay); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleWebSwitchAllOn(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	if err := s.deviceManager.WebSwitch().AllOn(); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleWebSwitchAllOff(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	if err := s.deviceManager.WebSwitch().AllOff(); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

// Rotator handlers
func (s *Server) handleRotatorHeading(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		Heading int `json:"heading"`
	}

	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if err := s.deviceManager.RotatorGenius().SetHeading(req.Heading); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleRotatorCW(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	if err := s.deviceManager.RotatorGenius().RotateCW(); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleRotatorCCW(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	if err := s.deviceManager.RotatorGenius().RotateCCW(); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleRotatorStop(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	if err := s.deviceManager.RotatorGenius().Stop(); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

// Tuner handlers
func (s *Server) handleTunerOperate(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		Value int `json:"value"`
	}

	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if err := s.deviceManager.TunerGenius().SetOperate(req.Value); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleTunerBypass(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		Value int `json:"value"`
	}

	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if err := s.deviceManager.TunerGenius().SetBypass(req.Value); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleTunerAutoTune(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	if err := s.deviceManager.TunerGenius().AutoTune(); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

// Antenna Genius handlers
func (s *Server) handleAntennaSelect(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		Port    int `json:"port"`
		Antenna int `json:"antenna"`
	}

	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if err := s.deviceManager.AntennaGenius().SetAntenna(req.Port, req.Antenna); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleAntennaReboot(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	if err := s.deviceManager.AntennaGenius().Reboot(); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

// Power Genius handlers
func (s *Server) handlePowerFanMode(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		Mode string `json:"mode"`
	}

	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if err := s.deviceManager.PowerGenius().SetFanMode(req.Mode); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handlePowerOperate(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		Value int `json:"value"`
	}

	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if err := s.deviceManager.PowerGenius().SetOperate(req.Value); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

// Ultrabeam handlers
func (s *Server) handleUltrabeamFrequency(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		Frequency int `json:"frequency"` // KHz
		Direction int `json:"direction"` // 0=normal, 1=180°, 2=bi-dir
	}

	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if err := s.deviceManager.Ultrabeam().SetFrequency(req.Frequency, req.Direction); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleUltrabeamRetract(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	if err := s.deviceManager.Ultrabeam().Retract(); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) handleUltrabeamAutoTrack(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		Enabled   bool `json:"enabled"`
		Threshold int  `json:"threshold"` // kHz
	}

	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	s.deviceManager.SetAutoTrack(req.Enabled, req.Threshold*1000) // Convert kHz to Hz

	s.sendJSON(w, map[string]string{"status": "ok"})
}

func (s *Server) sendJSON(w http.ResponseWriter, data interface{}) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(data)
}