import type { Channel, LocalMessage } from 'stream-chat'

import type { PaymentStatus } from '../../../stream-custom-data'

export interface LockedAttachmentGalleryItem {
  /** Drives the per-item play/lock affordance. */
  mimeType: string
  /** Poster image, locked or unlocked. */
  thumbnailUrl?: string
  /** Media source, shown only when unlocked. */
  sourceUrl?: string
}

export interface LockedAttachmentSource {
  /** Proxied URL for in-app playback. */
  sourceUrl: string
  /** Opened when the visitor clicks Download. */
  redeemUrl?: string
  /** Overrides the metadata thumbnail when present. */
  thumbnailUrl?: string
}

export type { PaymentStatus }

/** Fetches the underlying source; `void` return means none available. */
export type FetchSourceHandler = () => Promise<LockedAttachmentSource | void>

export interface LockedAttachmentContextValue {
  /** Whether the given message is mid-checkout. */
  isUnlocking: (id: string) => boolean
  /** Opens the checkout flow for a message. */
  onUnlockClick?: (message: LocalMessage, channel: Channel) => void
  /** Handles a Download click for a message. */
  onDownloadClick?: (message: LocalMessage, channel: Channel) => void
  /** Reveals the locked media's source. Unused for text — payment writes `message.text` directly. */
  onFetchSource?: (
    message: LocalMessage,
    channel: Channel
  ) => Promise<LockedAttachmentSource | void>
}

export const defaultLockedAttachmentContextValue: LockedAttachmentContextValue =
  {
    isUnlocking: () => false,
  }