# 098: Image Gallery
# Photo gallery with local storage and albums

state images = load "images" locally or []
state current_album = "all"
state selected_image = null

# Upload images
button "Add Photos" -> upload_images()

upload_images():
  ask permission for: [filesystem.read, storage]
    purpose: "Upload and save photos"

  if granted:
    files = open_file_picker(accept: "image/*", multiple: true)

    for file in files:
      image = {
        id: generate_id(),
        name: file.name,
        data: file.read_as_data_url(),
        size: file.size,
        uploaded_at: now(),
        album: current_album,
        tags: [],
        favorite: false
      }

      images.append(image)

    store images locally as "images"
    show "Uploaded {files.length} photos"

# Create album
form create_album:
  input album_name -> new_album

  button "Create Album" -> create_album_action(new_album)

create_album_action(name):
  # Albums are derived from image data
  current_album = name
  show "Album '{name}' created"

# Move to album
move_to_album(image_id, album):
  images = images.map(img => {
    if img.id == image_id:
      { ...img, album: album }
    else:
      img
  })

  store images locally as "images"

# Toggle favorite
toggle_favorite(id):
  images = images.map(img => {
    if img.id == id:
      { ...img, favorite: not img.favorite }
    else:
      img
  })

  store images locally as "images"

# Delete image
delete_image(id):
  ask "Delete this image?" -> confirm

  if confirm == "yes":
    images = images.filter(img => img.id != id)
    store images locally as "images"
    selected_image = null

# Filter by album
computed filtered_images = images.filter(img => {
  current_album == "all" or img.album == current_album
})

# Get unique albums
computed albums = images
  .map(img => img.album)
  .unique()
  .sort()

# Album switcher
show "Albums:"
button "All ({images.length})" -> current_album = "all"

for album in albums:
  count = images.filter(img => img.album == album).length
  button "{album} ({count})" -> current_album = album

# Gallery grid
show_gallery_grid:
  for image in filtered_images:
    show_thumbnail:
      src: image.data
      name: image.name
      favorite: image.favorite
      on_click: () => selected_image = image
      on_favorite: () => toggle_favorite(image.id)

# Lightbox view
if selected_image != null:
  show_lightbox:
    image: selected_image.data
    name: selected_image.name
    size: format_file_size(selected_image.size)
    uploaded: format_date(selected_image.uploaded_at)

    button "Close" -> selected_image = null
    button "Delete" -> delete_image(selected_image.id)
    button "Previous" -> show_previous()
    button "Next" -> show_next()

show_previous():
  index = filtered_images.find_index(img => img.id == selected_image.id)
  if index > 0:
    selected_image = filtered_images[index - 1]

show_next():
  index = filtered_images.find_index(img => img.id == selected_image.id)
  if index < filtered_images.length - 1:
    selected_image = filtered_images[index + 1]

# Auto-tag with AI
button "Auto-Tag All" -> auto_tag_images()

auto_tag_images():
  for image in images:
    if image.tags.length == 0:
      tags = ai.classify(image.data, {
        categories: ["nature", "people", "food", "architecture", "animals"],
        multiple: true
      })

      image.tags = tags

  store images locally as "images"
  show "Images auto-tagged"

generate_id():
  return now() + Math.random()

format_file_size(bytes):
  return "{(bytes / 1024).toFixed(1)} KB"