package main

import (
	"context"
	"errors"
	"fmt"
	"os"
	"os/signal"
	"syscall"

	"streamrip-go/internal/config"
	"streamrip-go/internal/verbose"

	_ "modernc.org/sqlite"
)

func main() {
	os.Exit(run())
}

// run executes the CLI and returns the process exit code. It exists so that
// deferred cleanup (SQLite handles, progress bars, artwork temp dirs) always
// runs; calling os.Exit directly from the command bodies skipped every defer.
func run() int {
	gopts, err := parseGlobalArgs(os.Args[1:])
	if err != nil {
		fmt.Fprintf(os.Stderr, "option error: %v\n", err)
		return 2
	}
	if gopts.version {
		printVersion(os.Stdout)
		return 0
	}
	if gopts.help {
		printMainHelp(os.Stdout)
		return 0
	}
	if gopts.command == "" {
		printMainHelp(os.Stdout)
		return 2
	}
	if gopts.command == "help" {
		if len(gopts.commandArgs) == 0 || isHelpArg(gopts.commandArgs[0]) {
			printMainHelp(os.Stdout)
			return 0
		}
		if printCommandHelp(os.Stdout, gopts.commandArgs[0]) {
			return 0
		}
		fmt.Fprintf(os.Stderr, "unknown help topic: %s\n", gopts.commandArgs[0])
		return 2
	}
	if gopts.command == "dev-help" {
		printDeveloperHelp(os.Stdout)
		return 0
	}
	if commandWantsHelp(gopts.commandArgs) {
		if printCommandHelp(os.Stdout, gopts.command) {
			return 0
		}
		fmt.Fprintf(os.Stderr, "unknown command: %s\n", gopts.command)
		return 2
	}

	cfg, err := config.Load(gopts.configPath)
	if err != nil {
		if errors.Is(err, config.ErrOutdatedConfig) {
			resolvedPath, upErr := config.UpgradeOutdated(gopts.configPath)
			if upErr != nil {
				fmt.Fprintf(os.Stderr, "config error: %v\n", err)
				fmt.Fprintf(os.Stderr, "config auto-upgrade failed: %v\n", upErr)
				return 1
			}
			fmt.Fprintf(os.Stderr, "config upgraded at %s\n", resolvedPath)
			cfg, err = config.Load(gopts.configPath)
		}
	}
	if err != nil {
		fmt.Fprintf(os.Stderr, "config error: %v\n", err)
		return 1
	}
	applyGlobalConfigOverrides(cfg, gopts)
	verbose.SetLevel(gopts.verbose)
	if gopts.verbose >= 2 {
		fmt.Fprintln(os.Stderr, "verbose mode enabled (level 2: downloads + http)")
	} else if gopts.verbose >= 1 {
		fmt.Fprintln(os.Stderr, "verbose mode enabled (level 1: downloads)")
	}

	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
	defer stop()

	args := gopts.commandArgs

	switch gopts.command {
	case "url":
		return cmdURL(ctx, cfg, gopts, args)
	case "file":
		return cmdFile(ctx, cfg, gopts, args)
	case "config":
		return cmdConfig(ctx, cfg, gopts, args)
	case "database":
		return cmdDatabase(ctx, cfg, gopts, args)
	case "id":
		return cmdID(ctx, cfg, gopts, args)
	case "search":
		return cmdSearch(ctx, cfg, gopts, args)
	case "lastfm":
		return cmdLastFM(ctx, cfg, gopts, args)
	case "soundcloud-smoke":
		return cmdSoundcloudSmoke(ctx, cfg, gopts, args)
	case "qobuz-smoke":
		return cmdQobuzSmoke(ctx, cfg, gopts, args)
	case "qobuz-convert-rip-smoke":
		return cmdQobuzConvertRipSmoke(ctx, cfg, gopts, args)
	case "qobuz-search-smoke":
		return cmdQobuzSearchSmoke(ctx, cfg, gopts, args)
	case "tidal-search-smoke":
		return cmdTidalSearchSmoke(ctx, cfg, gopts, args)
	case "tidal-metadata-smoke":
		return cmdTidalMetadataSmoke(ctx, cfg, gopts, args)
	case "tidal-video-smoke":
		return cmdTidalVideoSmoke(ctx, cfg, gopts, args)
	default:
		fmt.Fprintf(os.Stderr, "unknown command: %s\n", gopts.command)
		return 2
	}
}