package main

import (
	"fmt"
	"strconv"

	"codeberg.org/maxwelljensen/weimar/internal/config"
	"codeberg.org/maxwelljensen/weimar/internal/db"
	"codeberg.org/maxwelljensen/weimar/internal/storage"
	"github.com/spf13/cobra"
)

var imageCmd = &cobra.Command{
	Use:   "image",
	Short: "Manage images",
}

var imageDeleteCmd = &cobra.Command{
	Use:   "delete <id>",
	Short: "Delete an image by ID",
	Args:  cobra.ExactArgs(1),
	RunE: func(cmd *cobra.Command, args []string) error {
		id, err := strconv.ParseInt(args[0], 10, 64)
		if err != nil {
			return fmt.Errorf("invalid image ID: %w", err)
		}

		cfg := config.FromViper()
		database, err := db.Open(cfg.Database.Path)
		if err != nil {
			return fmt.Errorf("opening database: %w", err)
		}
		defer database.Close()

		img, err := database.GetImageByID(cmd.Context(), id)
		if err != nil {
			return fmt.Errorf("looking up image: %w", err)
		}

		st, err := storage.New(cfg.Storage.Path)
		if err != nil {
			return fmt.Errorf("opening storage: %w", err)
		}

		// Delete thumbnail first if it exists.
		if img.ThumbnailPath != nil {
			if err := st.Delete(*img.ThumbnailPath); err != nil {
				return fmt.Errorf("deleting thumbnail: %w", err)
			}
		}

		// Delete original file.
		if err := st.Delete(img.StoragePath); err != nil {
			return fmt.Errorf("deleting file: %w", err)
		}

		// Delete database record.
		if err := database.DeleteImage(cmd.Context(), id); err != nil {
			return fmt.Errorf("deleting image record: %w", err)
		}

		fmt.Fprintf(cmd.OutOrStdout(), "deleted image %d: %s\n", img.ID, img.Filename)
		return nil
	},
}

var imageRescanInnateCmd = &cobra.Command{
	Use:   "rescan-innate",
	Short: "Recompute innate tags for all images missing them",
	Long: `Scans every image in the database and computes innate tags
(image, video, gif, lowres, highres, >10 sec, <10 sec) for any
record that has no innate tags yet. This is useful after upgrading
from an older version that did not support innate tags.`,
	Args: cobra.NoArgs,
	RunE: func(cmd *cobra.Command, args []string) error {
		cfg := config.FromViper()

		database, err := db.Open(cfg.Database.Path)
		if err != nil {
			return fmt.Errorf("opening database: %w", err)
		}
		defer database.Close()

		st, err := storage.New(cfg.Storage.Path)
		if err != nil {
			return fmt.Errorf("opening storage: %w", err)
		}

		images, err := database.ListAllImages(cmd.Context())
		if err != nil {
			return fmt.Errorf("listing images: %w", err)
		}

		var updated int
		for _, img := range images {
			if len(img.InnateTags) > 0 {
				continue
			}

			videoPath := ""
			if storage.IsVideo(img.MimeType) {
				videoPath = st.AbsPath(img.StoragePath)
			}
			tags := storage.ComputeInnateTags(img.MimeType, img.Width, img.Height, videoPath)

			if err := database.UpdateImageInnateTags(cmd.Context(), img.ID, tags); err != nil {
				fmt.Fprintf(cmd.ErrOrStderr(), "error updating image %d: %v\n", img.ID, err)
				continue
			}
			updated++
			fmt.Fprintf(cmd.OutOrStdout(), "  image %d (%s): %v\n", img.ID, img.Filename, tags)
		}

		fmt.Fprintf(cmd.OutOrStdout(), "done — updated %d image(s)\n", updated)
		return nil
	},
}

func init() {
	rootCmd.AddCommand(imageCmd)
	imageCmd.AddCommand(imageDeleteCmd)
	imageCmd.AddCommand(imageRescanInnateCmd)
}