package backup

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

	"github.com/spf13/cobra"
	"git.misaka.ren/M1saka/docker_backup/internal/backup"
	"git.misaka.ren/M1saka/docker_backup/internal/config"
)

var listCmd = &cobra.Command{
	Use:   "list",
	Short: "List configured projects and their backups",
	RunE:  runList,
}

func init() {
	rootCmd.AddCommand(listCmd)
}

func runList(cmd *cobra.Command, args []string) error {
	cfg, err := config.Load(cfgFile)
	if err != nil {
		return fmt.Errorf("load config: %w", err)
	}

	fmt.Printf("Config: %s\n\n", cfgFile)

	for _, proj := range cfg.Projects {
		fmt.Printf("  [%s]\n", proj.Name)
		fmt.Printf("    path:         %s\n", proj.Path)
		fmt.Printf("    compose_file: %s\n", proj.ComposeFile)
		if proj.Cron != "" {
			fmt.Printf("    cron:         %s\n", proj.Cron)
		}
		if len(proj.Exclude) > 0 {
			fmt.Printf("    exclude:      %s\n", strings.Join(proj.Exclude, ", "))
		}
		fmt.Printf("    retention:    %d copies", proj.Retention.Count)
		if proj.Retention.Days > 0 {
			fmt.Printf(", %d days", proj.Retention.Days)
		}
		fmt.Println()

		// List existing backups.
		backupDir := filepath.Join(cfg.Global.BackupDir, proj.Name)
		entries, err := os.ReadDir(backupDir)
		if err != nil {
			fmt.Printf("    backups:      none (dir not found)\n\n")
			continue
		}

		var backups []string
		for _, e := range entries {
			if !e.IsDir() {
				backups = append(backups, e.Name())
			}
		}
		sort.Sort(sort.Reverse(sort.StringSlice(backups)))

		if len(backups) == 0 {
			fmt.Printf("    backups:      none\n\n")
			continue
		}

		fmt.Printf("    backups:\n")
		for _, b := range backups {
			info, _ := os.Stat(filepath.Join(backupDir, b))
			size := ""
			if info != nil {
				size = backup.FormatSize(info.Size())
			}
			fmt.Printf("      %s  %s\n", b, size)
		}
		fmt.Println()
	}

	return nil
}