package installer

import (
	"os"
	"path/filepath"
	"strings"

	"gitgud.io/mike/mpv-manager/pkg/constants"
)

// detectMacAppBundles reads standard bundle metadata without launching player
// code, loading user configuration, or claiming ownership of external apps.
func detectMacAppBundles(applicationsDir string) []DetectedApp {
	var apps []DetectedApp
	var seen []os.FileInfo
	for _, candidate := range []struct{ bundle, executable, name, method string }{
		{"MPV.app", "mpv", "MPV", constants.MethodMPVApp},
		{"mpv.app", "mpv", "MPV", constants.MethodMPVApp},
		{"IINA.app", "IINA", "IINA", constants.MethodIINA},
	} {
		bundle := filepath.Join(applicationsDir, candidate.bundle)
		info, err := os.Stat(bundle)
		if err != nil || !info.IsDir() {
			continue
		}
		duplicate := false
		for _, prior := range seen {
			if os.SameFile(info, prior) {
				duplicate = true
				break
			}
		}
		if duplicate {
			continue
		}
		executable, err := os.Stat(filepath.Join(bundle, "Contents", "MacOS", candidate.executable))
		if err != nil || !executable.Mode().IsRegular() || executable.Mode().Perm()&0111 == 0 {
			continue
		}
		seen = append(seen, info)
		version := ""
		if output, err := runDetectionProbe("/usr/bin/plutil", "-extract", "CFBundleShortVersionString", "raw", "-o", "-", filepath.Join(bundle, "Contents", "Info.plist")); err == nil {
			version = strings.TrimSpace(string(output))
		}
		apps = append(apps, DetectedApp{AppName: candidate.name, MethodID: candidate.method,
			Version: version, InstallPath: bundle, InstallType: "app"})
	}
	return apps
}