package cli

import (
	"context"
	"fmt"
	"os"

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

// PurgeOptions contains options for the purge command
type PurgeOptions struct {
	KeepLatest bool
	OlderThan  string
	Force      bool
}

// NewPurgeCommand creates the purge command
func NewPurgeCommand() *cobra.Command {
	opts := &PurgeOptions{}

	cmd := &cobra.Command{
		Use:   "purge",
		Short: "Purge old snapshots",
		Long: `Removes snapshots based on age or count criteria.

This command allows you to:
- Keep only the latest snapshot (--keep-latest)
- Remove snapshots older than a specific duration (--older-than)

Config is located at /etc/vaultik/config.yml by default, 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 {
			// Validate flags
			if !opts.KeepLatest && opts.OlderThan == "" {
				return fmt.Errorf("must specify either --keep-latest or --older-than")
			}
			if opts.KeepLatest && opts.OlderThan != "" {
				return fmt.Errorf("cannot specify both --keep-latest and --older-than")
			}

			// 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,
				},
				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 purge operation in a goroutine
								go func() {
									// Run the purge operation
									if err := v.PurgeSnapshots(opts.KeepLatest, opts.OlderThan, opts.Force); err != nil {
										if err != context.Canceled {
											log.Error("Purge operation failed", "error", err)
											os.Exit(1)
										}
									}

									// Shutdown the app when purge 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 purge operation")
								v.Cancel()
								return nil
							},
						})
					}),
				},
			})
		},
	}

	cmd.Flags().BoolVar(&opts.KeepLatest, "keep-latest", false, "Keep only the latest snapshot")
	cmd.Flags().StringVar(&opts.OlderThan, "older-than", "", "Remove snapshots older than duration (e.g. 30d, 6m, 1y)")
	cmd.Flags().BoolVar(&opts.Force, "force", false, "Skip confirmation prompts")

	return cmd
}