package cli

import (
	"context"
	"os"

	"github.com/spf13/cobra"
	"go.uber.org/fx"
	"sneak.berlin/go/vaultik/internal/log"
	"sneak.berlin/go/vaultik/internal/vaultik"
)

// NewPruneCommand creates the prune command
func NewPruneCommand() *cobra.Command {
	opts := &vaultik.PruneOptions{}

	cmd := &cobra.Command{
		Use:   "prune",
		Short: "Tidy local database and remote storage",
		Long: `Removes orphaned data from both the local index database and
unreferenced blobs from the backup destination store.

Local cleanup drops incomplete snapshots and any files, chunks, or
blobs no longer referenced by a completed snapshot. Remote cleanup
scans every snapshot manifest in the destination store, builds the
set of still-referenced blob hashes, and deletes any blob not in that
set.

Snapshot create --prune and snapshot remove run the same cleanup
automatically; this command is the manual entry point for the same
work (e.g. after a crashed backup or to reclaim storage).`,
		Args: cobra.NoArgs,
		RunE: func(cmd *cobra.Command, args []string) error {
			// Use unified config resolution
			configPath, err := ResolveConfigPath()
			if err != nil {
				return err
			}

			// Use the app framework like other commands
			rootFlags := GetRootFlags()
			return RunWithApp(cmd.Context(), AppOptions{
				ConfigPath: configPath,
				LogOptions: log.LogOptions{
					Verbose: rootFlags.Verbose,
					Debug:   rootFlags.Debug,
					Quiet:   rootFlags.Quiet || opts.JSON,
				},
				Modules: []fx.Option{},
				Invokes: []fx.Option{
					fx.Invoke(func(v *vaultik.Vaultik, lc fx.Lifecycle) {
						lc.Append(fx.Hook{
							OnStart: func(ctx context.Context) error {
								// Start the prune operation in a goroutine
								go func() {
									// Run the prune operation
									if err := v.Prune(opts); err != nil {
										if err != context.Canceled {
											if !opts.JSON {
												log.Error("Prune operation failed", "error", err)
												ReportError("Prune failed: %v", err)
											}
											os.Exit(1)
										}
									}

									// Shutdown the app when prune completes
									if err := v.Shutdowner.Shutdown(); err != nil {
										log.Error("Failed to shutdown", "error", err)
									}
								}()
								return nil
							},
							OnStop: func(ctx context.Context) error {
								log.Debug("Stopping prune operation")
								v.Cancel()
								return nil
							},
						})
					}),
				},
			})
		},
	}

	cmd.Flags().BoolVar(&opts.Force, "force", false, "Skip confirmation prompt")
	cmd.Flags().BoolVar(&opts.JSON, "json", false, "Output pruning stats as JSON")

	return cmd
}