package cmd

import (
	"fmt"
	"os"
	"strings"

	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"codeberg.org/romaintb/fgj/internal/git"
)

var cfgFile string

var rootCmd = &cobra.Command{
	Use:   "fgj",
	Short: "Forgejo CLI tool - work seamlessly with Forgejo from the command line",
	Long: `fgj is a command line tool for Forgejo instances (including Codeberg).
It brings pull requests, issues, and other Forgejo concepts to the terminal.`,
	Version: "0.2.0",
}

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

func init() {
	cobra.OnInitialize(initConfig)

	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.config/fgj/config.yaml)")
	rootCmd.PersistentFlags().String("hostname", "", "Forgejo instance hostname")
	_ = viper.BindPFlag("hostname", rootCmd.PersistentFlags().Lookup("hostname"))
}

func initConfig() {
	if cfgFile != "" {
		viper.SetConfigFile(cfgFile)
	} else {
		home, err := os.UserHomeDir()
		if err != nil {
			fmt.Fprintln(os.Stderr, err)
			os.Exit(1)
		}

		configDir := home + "/.config/fgj"
		_ = os.MkdirAll(configDir, 0755)

		viper.AddConfigPath(configDir)
		viper.SetConfigType("yaml")
		viper.SetConfigName("config")
	}

	viper.AutomaticEnv()
	viper.SetEnvPrefix("FGJ")

	_ = viper.ReadInConfig()
}

// parseRepo parses the repository string in the format "owner/name".
// If not provided, it attempts to auto-detect from the git repository.
func parseRepo(repo string) (string, string, error) {
	// If repo flag is provided, use it
	if repo != "" {
		parts := strings.Split(repo, "/")
		if len(parts) != 2 {
			return "", "", fmt.Errorf("invalid repository format: %s (expected: owner/name)", repo)
		}
		return parts[0], parts[1], nil
	}

	// Try to auto-detect from git
	owner, name, err := git.DetectRepo()
	if err != nil {
		return "", "", fmt.Errorf("repository flag is required (use -R owner/name) or run from a git repository: %w", err)
	}

	return owner, name, nil
}

// getDetectedHost attempts to auto-detect the Forgejo instance hostname.
// Returns empty string if detection fails, which will fall back to other methods.
func getDetectedHost() string {
	host, err := git.DetectHost()
	if err != nil {
		return ""
	}
	return host
}