package main

import (
	"log"
	"os"
	"path/filepath"
	"runtime"

	steamimmich "git.kapelle.org/niklas/steam-immich/internal"
	"github.com/alexflint/go-arg"
)

type args struct {
	BaseURL     string `arg:"--base-url,required" placeholder:"BASE_URL" help:"Base URL of the Immich instance e.g.: https://demo.immich.app"`
	APIKey      string `arg:"--api-key,required" placeholder:"API_KEY" help:"API Key. Needs asset.upload, asset.update, albumAsset.create"`
	UserdataDir string `arg:"--steam-userdata-dir" placeholder:"USERDATA_DIR" help:"Steam userdata directory. If not set, search automaticly."`
	DeviceID    string `arg:"--device-id" default:"steam-immich" help:"Device ID of the uploads"`
	Album       string `arg:"--album" help:"UUID of a album to upload to"`
}

func main() {
	var args args
	arg.MustParse(&args)

	var steamUserdataDir = ""

	if args.UserdataDir != "" {
		steamUserdataDir = os.ExpandEnv(args.UserdataDir)
	} else {
		steamUserdataDir = findUserdataDir()
	}

	if steamUserdataDir == "" {
		log.Fatal("Can not find steam userdata dir. Please set with --steam-userdata-dir")
	}

	steamimmich.Run(steamimmich.Config{
		APIKey:      args.APIKey,
		BaseURL:     args.BaseURL,
		UserdataDir: steamUserdataDir,
		DeiveID:     args.DeviceID,
		Album:       args.Album,
	})
}

func findUserdataDir() string {
	var candidates []string

	switch runtime.GOOS {
	case "windows":
		// Common Steam install paths on Windows
		localAppData := os.Getenv("LOCALAPPDATA")
		programFiles := os.Getenv("ProgramFiles(x86)")
		if programFiles == "" {
			programFiles = os.Getenv("ProgramFiles")
		}

		candidates = []string{
			filepath.Join(programFiles, "Steam"),
			filepath.Join(localAppData, "Steam"),
		}

	case "linux":
		home := os.Getenv("HOME")

		candidates = []string{
			filepath.Join(home, ".steam", "steam"),                                         // standard
			filepath.Join(home, ".local", "share", "Steam"),                                // alternate
			filepath.Join(home, ".var", "app", "com.valvesoftware.Steam", "data", "Steam"), // Flatpak
		}
	case "darwin":
		// Common Steam install path on macOS
		home := os.Getenv("HOME")
		candidates = []string{
			filepath.Join(home, "Library", "Application Support", "Steam"),
		}

	default:
		return ""
	}

	for _, base := range candidates {
		userdata := filepath.Join(base, "userdata")
		info, err := os.Stat(userdata)
		if err == nil && info.IsDir() {
			return userdata
		}
	}

	return ""
}