package main

import (
	"errors"
	"fmt"
	"log/slog"
	"os"
	"strings"

	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

var cfgFile string

var rootCmd = &cobra.Command{
	Use:   "weimar",
	Short: "Self-hosted media repository for small groups",
	Long: `weimar is a single-binary media repository for home servers.
Store, tag, and browse memes and group-interest images with friends.`,
	PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
		return initConfig()
	},
	SilenceUsage:  true,
	SilenceErrors: true,
}

func Execute() error {
	return rootCmd.Execute()
}

func init() {
	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "path to config file (default ./weimar.toml)")
	rootCmd.PersistentFlags().String("log-level", "info", "log level (debug, info, warn, error)")
	viper.BindPFlag("log-level", rootCmd.PersistentFlags().Lookup("log-level"))
}

func initConfig() error {
	if cfgFile != "" {
		viper.SetConfigFile(cfgFile)
	} else {
		viper.AddConfigPath(".")
		viper.SetConfigName("weimar")
	}

	viper.SetEnvPrefix("WEIMAR")
	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_", "-", "_"))
	viper.AutomaticEnv()

	if err := viper.ReadInConfig(); err != nil {
		var notFound viper.ConfigFileNotFoundError
		if errors.As(err, &notFound) {
			// No config file is fine — use defaults + env.
		} else {
			return fmt.Errorf("reading config: %w", err)
		}
	}

	setDefaults()

	level := slog.LevelInfo
	switch strings.ToLower(viper.GetString("log-level")) {
	case "debug":
		level = slog.LevelDebug
	case "warn":
		level = slog.LevelWarn
	case "error":
		level = slog.LevelError
	}
	slog.SetDefault(slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: level})))

	return nil
}

func setDefaults() {
	viper.SetDefault("server.host", "0.0.0.0")
	viper.SetDefault("server.port", 8080)
	viper.SetDefault("database.path", "./data/weimar.db")
	viper.SetDefault("storage.path", "./data/images")
	viper.SetDefault("upload.max_size_mb", 50)
	viper.SetDefault("upload.rate_limit_per_minute", 0)
	viper.SetDefault("auth.allow_registration", true)
	viper.SetDefault("auth.require_auth_for_browse", false)
}