//go:build !windows

package extsvc

import (
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
)

// DefaultTQSLPath finds TrustedQSL, or returns "" so the operator can point at
// it by hand.
//
// PATH is asked FIRST, unlike the Windows side where two fixed install folders
// are the whole story. On Linux tqsl comes from the distribution's package
// manager, a Flatpak or a self-built copy, and each puts it somewhere
// different; whichever one the operator installed is the one their shell finds.
// The fixed list below is only for a desktop session that started without a
// useful PATH.
func DefaultTQSLPath() string {
	if p, err := exec.LookPath("tqsl"); err == nil && fileExists(p) {
		return p
	}
	candidates := []string{
		"/usr/bin/tqsl",
		"/usr/local/bin/tqsl",
		"/var/lib/flatpak/exports/bin/org.arrl.tqsl",
		filepath.Join(os.Getenv("HOME"), ".local/share/flatpak/exports/bin/org.arrl.tqsl"),
	}
	if runtime.GOOS == "darwin" {
		candidates = append(candidates, "/Applications/TrustedQSL/tqsl.app/Contents/MacOS/tqsl")
	}
	for _, p := range candidates {
		if fileExists(p) {
			return p
		}
	}
	return ""
}

// DefaultStationDataPath returns TQSL's station_data location.
//
// ~/.tqsl is where the Unix build of TrustedQSL keeps its configuration. A
// Flatpak install redirects it into the sandbox
// (~/.var/app/org.arrl.tqsl/data/tqsl), so that is tried too — an operator on a
// Flatpak TQSL otherwise sees an empty station-location list with nothing to
// explain it.
func DefaultStationDataPath() string {
	home, err := os.UserHomeDir()
	if err != nil || home == "" {
		return ""
	}
	for _, p := range []string{
		filepath.Join(home, ".tqsl", "station_data"),
		filepath.Join(home, ".var", "app", "org.arrl.tqsl", "data", "tqsl", "station_data"),
	} {
		if fileExists(p) {
			return p
		}
	}
	// Nothing found: name the ordinary location anyway. The settings field then
	// shows the path TQSL would create on its first run, which is a better
	// starting point for the operator than an empty box.
	return filepath.Join(home, ".tqsl", "station_data")
}