import axios from 'axios'

const API_BASE_URL = 'http://localhost:8001/api/v1'

const api = axios.create({
  baseURL: API_BASE_URL,
  headers: {
    'Content-Type': 'application/json',
  },
})

// Source Folders API. Source roots are config-driven now (PHOTO_DIRS in
// .env → bootstrap on backend startup), so the UI only reads them and
// optionally renames the display label.
export interface FolderTreeNode {
  id: string
  name: string
  path: string
  photo_count: number
  children: FolderTreeNode[]
}

export const sourceFolders = {
  list: async () => {
    const response = await api.get('/folders')
    return response.data
  },

  /** Recursive folder tree, one root per active source root. */
  tree: async (): Promise<FolderTreeNode[]> => {
    const response = await api.get('/folders/tree')
    return response.data
  },

  scan: async (folderId: string) => {
    const response = await api.post(`/folders/${folderId}/scan`)
    return response.data
  },

  /** Rename the display label only — the on-disk path is controlled by
   *  the docker mount and cannot be changed from the UI. */
  rename: async (folderId: string, name: string) => {
    const response = await api.patch(`/folders/${folderId}`, { name })
    return response.data
  },
}

// Photos API
export const photos = {
  list: async (params?: {
    limit?: number
    offset?: number
    folder_id?: string
    heap_id?: string
    rating?: number
    flag?: string
  }) => {
    const response = await api.get('/photos', { params })
    return response.data
  },

  get: async (photoId: string) => {
    const response = await api.get(`/photos/${photoId}`)
    return response.data
  },

  update: async (photoId: string, data: {
    filename?: string
    rating?: number
    user_title?: string | null
    user_notes?: string | null
    color_label?: string | null
    is_picked?: boolean
    is_discarded?: boolean
    taken_at?: string
  }) => {
    const response = await api.patch(`/photos/${photoId}`, data)
    return response.data
  },

  /** Bulk discard — matches the backend BulkAction schema. */
  bulkDiscard: async (photoIds: string[]) => {
    const response = await api.post('/photos/bulk', {
      ids: photoIds,
      action: 'discard',
    })
    return response.data
  },

  /** Bulk restore from discarded. */
  bulkRestore: async (photoIds: string[]) => {
    const response = await api.post('/photos/bulk', {
      ids: photoIds,
      action: 'restore',
    })
    return response.data
  },

  /** Bulk set rating (0-5). */
  bulkSetRating: async (photoIds: string[], rating: number) => {
    const response = await api.post('/photos/bulk', {
      ids: photoIds,
      action: 'set_rating',
      value: rating,
    })
    return response.data
  },

  /** Bulk set color label (or null to clear). */
  bulkSetColor: async (photoIds: string[], color: string | null) => {
    const response = await api.post('/photos/bulk', {
      ids: photoIds,
      action: 'set_color',
      value: color,
    })
    return response.data
  },

  /** Move photos into a target folder (or source root). Returns
   *  { moved, errors[] }. */
  move: async (photoIds: string[], targetId: string) => {
    const response = await api.post('/photos/move', {
      photo_ids: photoIds,
      target_id: targetId,
    })
    return response.data as { status: string; moved: number; errors: Array<{ id: string; error: string }> }
  },

  /** Copy photos into a target folder. Originals are unaffected; new
   *  rows are created with is_duplicate=true. */
  copy: async (photoIds: string[], targetId: string) => {
    const response = await api.post('/photos/copy', {
      photo_ids: photoIds,
      target_id: targetId,
    })
    return response.data as { status: string; copied: number; errors: Array<{ id: string; error: string }> }
  },

  getThumbnailUrl: (photoId: string, size: 'small' | 'medium' | 'large' = 'medium') => {
    return `${API_BASE_URL}/photos/${photoId}/thumb/${size}`
  },

  getOriginalUrl: (photoId: string) => {
    return `${API_BASE_URL}/photos/${photoId}/original`
  },

  /** Full-resolution display URL. Backend serves the original for web-safe
   *  formats and a transcoded WebP for RAW/HEIC/TIFF. */
  getProxyUrl: (photoId: string) => {
    return `${API_BASE_URL}/photos/${photoId}/proxy`
  },
}

// Library API
export const library = {
  scan: async () => {
    const response = await api.post('/library/scan')
    return response.data
  },

  scanStatus: async () => {
    const response = await api.get('/library/scan/status')
    return response.data
  },

  stats: async () => {
    const response = await api.get('/library/stats')
    return response.data
  },
}

// Heaps API
export interface Heap {
  id: string
  name: string
  is_active: boolean
  created_at: string
  updated_at: string | null
  photo_count: number
}

export const heaps = {
  list: async (): Promise<Heap[]> => {
    const response = await api.get('/heaps')
    return response.data
  },

  create: async (name: string): Promise<Heap> => {
    const response = await api.post('/heaps', { name })
    return response.data
  },

  update: async (
    heapId: string,
    data: { name?: string; is_active?: boolean }
  ): Promise<Heap> => {
    const response = await api.patch(`/heaps/${heapId}`, data)
    return response.data
  },

  delete: async (heapId: string): Promise<void> => {
    await api.delete(`/heaps/${heapId}`)
  },

  /** Lightweight: just the photo ids in a heap, for client-side membership
   *  lookups (the basket affordance on thumbnails). */
  photoIds: async (heapId: string): Promise<string[]> => {
    const response = await api.get(`/heaps/${heapId}/photo_ids`)
    return response.data
  },

  addPhotos: async (heapId: string, photoIds: string[]) => {
    const response = await api.post(`/heaps/${heapId}/photos`, {
      photo_ids: photoIds,
    })
    return response.data
  },

  removePhotos: async (heapId: string, photoIds: string[]) => {
    const response = await api.delete(`/heaps/${heapId}/photos`, {
      data: { photo_ids: photoIds },
    })
    return response.data
  },

  /** Convert a heap into a folder by moving (or copying) every member
   *  photo into the target directory. Optionally creates a subfolder
   *  inside the target by name. */
  convert: async (
    heapId: string,
    body: {
      target_id: string
      mode: 'move' | 'copy'
      delete_heap: boolean
      subfolder_name?: string | null
    }
  ) => {
    const response = await api.post(`/heaps/${heapId}/convert`, body)
    return response.data as {
      status: string
      mode: 'move' | 'copy'
      moved: number
      copied: number
      errors: Array<{ id: string; error: string }>
      heap_deleted: boolean
    }
  },
}

// Tags API
export interface Tag {
  id: string
  name: string
  color: string | null
  photo_count: number
}

export const tags = {
  list: async (): Promise<Tag[]> => {
    const response = await api.get('/tags')
    return response.data
  },

  create: async (name: string, color?: string): Promise<Tag> => {
    const response = await api.post('/tags', { name, color })
    return response.data
  },

  update: async (tagId: string, data: { name?: string; color?: string }): Promise<Tag> => {
    const response = await api.patch(`/tags/${tagId}`, data)
    return response.data
  },

  delete: async (tagId: string): Promise<void> => {
    await api.delete(`/tags/${tagId}`)
  },

  /** Add one or more tags to a photo. */
  addToPhoto: async (photoId: string, tagIds: string[]) => {
    const response = await api.post(`/photos/${photoId}/tags`, { tag_ids: tagIds })
    return response.data
  },

  /** Remove a tag from a photo. */
  removeFromPhoto: async (photoId: string, tagId: string): Promise<void> => {
    await api.delete(`/photos/${photoId}/tags/${tagId}`)
  },
}

// Discard API
export const discard = {
  list: async () => {
    const response = await api.get('/discard')
    return response.data
  },

  restore: async (photoIds: string[]) => {
    const response = await api.post('/discard/restore', {
      photo_ids: photoIds,
    })
    return response.data
  },

  empty: async () => {
    const response = await api.delete('/discard/empty')
    return response.data
  },

  /** Permanently delete a specific subset of discarded photos. The backend
   *  silently skips ids that aren't in the pile, so this can never bypass
   *  the soft-delete safety net. */
  deletePermanent: async (photoIds: string[]) => {
    const response = await api.delete('/discard', {
      data: { photo_ids: photoIds },
    })
    return response.data
  },
}

export default api