package cli

import (
	"fmt"
	"os"

	"github.com/spf13/cobra"
	"sneak.berlin/go/vaultik/internal/config"
	"sneak.berlin/go/vaultik/internal/log"
)

// NewDatabaseCommand creates the database command group
func NewDatabaseCommand() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "database",
		Short: "Manage the local state database",
		Long:  `Commands for managing the local SQLite state database.`,
	}

	cmd.AddCommand(
		newDatabaseDeleteCommand(),
	)

	return cmd
}

// newDatabaseDeleteCommand creates the database delete command.
// (Renamed from "purge"; the operation removes the SQLite file
// entirely, which is a delete, not a purge of content.)
func newDatabaseDeleteCommand() *cobra.Command {
	var force bool

	cmd := &cobra.Command{
		Use:   "delete",
		Short: "Delete the local state database file",
		Long: `Completely removes the local SQLite state database.

This will erase all local tracking of:
- File metadata and change detection state
- Chunk and blob mappings
- Local snapshot records
- The storage-binding record

The remote storage is NOT affected. After deletion, the next backup
will perform a full scan and re-deduplicate against existing remote
blobs, and the local index will re-bind to the currently configured
storage destination on that run.

Use --force to skip the confirmation prompt.`,
		Args: cobra.NoArgs,
		RunE: func(_ *cobra.Command, _ []string) error {
			// Resolve config path
			configPath, err := ResolveConfigPath()
			if err != nil {
				return err
			}

			// Load config to get database path
			cfg, err := config.Load(configPath)
			if err != nil {
				return fmt.Errorf("failed to load config: %w", err)
			}

			dbPath := cfg.IndexPath

			// Check if database exists
			_, err = os.Stat(dbPath)
			if os.IsNotExist(err) {
				_, _ = fmt.Fprintf(os.Stdout, "Database does not exist: %s\n", dbPath)

				return nil
			}

			// Confirm unless --force
			if !force {
				_, _ = fmt.Fprintf(os.Stdout,
					"This will delete the local state database at:\n  %s\n\n", dbPath)
				_, _ = fmt.Fprint(os.Stdout, "Are you sure? Type 'yes' to confirm: ")

				var confirm string

				_, err = fmt.Scanln(&confirm)
				if err != nil || confirm != "yes" {
					_, _ = fmt.Fprintln(os.Stdout, "Aborted.")

					//nolint:nilerr // a failed/aborted confirmation is a clean abort
					return nil
				}
			}

			// Delete the database file
			err = os.Remove(dbPath)
			if err != nil {
				return fmt.Errorf("failed to delete database: %w", err)
			}

			// Also delete WAL and SHM files if they exist
			walPath := dbPath + "-wal"
			shmPath := dbPath + "-shm"
			_ = os.Remove(walPath) // Ignore errors - files may not exist
			_ = os.Remove(shmPath)

			rootFlags := GetRootFlags()
			if !rootFlags.Quiet {
				_, _ = fmt.Fprintf(os.Stdout, "Database deleted: %s\n", dbPath)
			}

			log.Info("Local state database deleted", "path", dbPath)

			return nil
		},
	}

	cmd.Flags().BoolVar(&force, "force", false, "Skip confirmation prompt")

	return cmd
}