package cli

import (
	"context"
	"fmt"
	"os"

	"git.eeqj.de/sneak/vaultik/internal/config"
	"git.eeqj.de/sneak/vaultik/internal/database"
	"git.eeqj.de/sneak/vaultik/internal/globals"
	"github.com/spf13/cobra"
	"go.uber.org/fx"
)

// BackupOptions contains options for the backup command
type BackupOptions struct {
	ConfigPath string
	Daemon     bool
	Cron       bool
	Prune      bool
}

// NewBackupCommand creates the backup command
func NewBackupCommand() *cobra.Command {
	opts := &BackupOptions{}

	cmd := &cobra.Command{
		Use:   "backup",
		Short: "Perform incremental backup",
		Long: `Backup configured directories using incremental deduplication and encryption.

Config is located at /etc/vaultik/config.yml, but can be overridden by specifying 
a path using --config or by setting VAULTIK_CONFIG to a path.`,
		Args: cobra.NoArgs,
		RunE: func(cmd *cobra.Command, args []string) error {
			// If --config not specified, check environment variable
			if opts.ConfigPath == "" {
				opts.ConfigPath = os.Getenv("VAULTIK_CONFIG")
			}
			// If still not specified, use default
			if opts.ConfigPath == "" {
				defaultConfig := "/etc/vaultik/config.yml"
				if _, err := os.Stat(defaultConfig); err == nil {
					opts.ConfigPath = defaultConfig
				} else {
					return fmt.Errorf("no config file specified, VAULTIK_CONFIG not set, and %s not found", defaultConfig)
				}
			}
			return runBackup(cmd.Context(), opts)
		},
	}

	cmd.Flags().StringVar(&opts.ConfigPath, "config", "", "Path to config file")
	cmd.Flags().BoolVar(&opts.Daemon, "daemon", false, "Run in daemon mode with inotify monitoring")
	cmd.Flags().BoolVar(&opts.Cron, "cron", false, "Run in cron mode (silent unless error)")
	cmd.Flags().BoolVar(&opts.Prune, "prune", false, "Delete all previous snapshots and unreferenced blobs after backup")

	return cmd
}

func runBackup(ctx context.Context, opts *BackupOptions) error {
	return RunWithApp(ctx, AppOptions{
		ConfigPath: opts.ConfigPath,
		Invokes: []fx.Option{
			fx.Invoke(func(g *globals.Globals, cfg *config.Config, repos *database.Repositories) error {
				// TODO: Implement backup logic
				fmt.Printf("Running backup with config: %s\n", opts.ConfigPath)
				fmt.Printf("Version: %s, Commit: %s\n", g.Version, g.Commit)
				fmt.Printf("Index path: %s\n", cfg.IndexPath)
				if opts.Daemon {
					fmt.Println("Running in daemon mode")
				}
				if opts.Cron {
					fmt.Println("Running in cron mode")
				}
				if opts.Prune {
					fmt.Println("Pruning enabled - will delete old snapshots after backup")
				}
				return nil
			}),
		},
	})
}