namespace Entity {
  export type Sub = {
    // For Image, Gifv, and Video
    width?: number
    height?: number
    size?: string
    aspect?: number

    // For Gifv and Video
    frame_rate?: string

    // For Audio, Gifv, and Video
    duration?: number
    bitrate?: number
  }

  export type Focus = {
    x: number
    y: number
  }

  export type Meta = {
    original?: Sub
    small?: Sub
    focus?: Focus
    length?: string
    duration?: number
    fps?: number
    size?: string
    width?: number
    height?: number
    aspect?: number
    audio_encode?: string
    audio_bitrate?: string
    audio_channel?: string
  }

  export type Attachment = {
    id: string
    type: 'unknown' | 'image' | 'gifv' | 'video' | 'audio'
    url: string
    remote_url: string | null
    preview_url: string | null
    text_url: string | null
    meta: Meta | null
    description: string | null
    blurhash: string | null
  }
}