import { Room } from 'matrix-js-sdk';
import { TUploadItem } from '../state/room/roomInputDrafts';
import { encryptFile } from './matrix';
import { safeFile } from './mimeTypes';
import { fulfilledPromiseSettledResult } from './common';
import { stripImageMetadata } from './stripImageMetadata';

/**
 * Files → composer upload items for `room`, encrypting first when the room
 * is E2EE. Shared by the composer's pick/drop/paste paths and the PWA share
 * target (#155).
 */
export async function filesToUploadItems(
  room: Room,
  files: File[],
  stripMetadata = true,
): Promise<TUploadItem[]> {
  const prepared = await Promise.all(
    files.map(async (raw) => {
      const f = safeFile(raw);
      // [Gitea #109] Drop EXIF/XMP/IPTC before anything else sees the bytes
      // (including encryption), so what's uploaded never carried them.
      const { file, stripped } = stripMetadata
        ? await stripImageMetadata(f)
        : { file: f, stripped: false };
      return {
        file,
        metadata: { markedAsSpoiler: false, metadataStripped: stripped || undefined },
      };
    }),
  );
  if (room.hasEncryptionStateEvent()) {
    const encrypted = fulfilledPromiseSettledResult(
      await Promise.allSettled(
        prepared.map(async ({ file, metadata }) => ({ ...(await encryptFile(file)), metadata })),
      ),
    );
    return encrypted;
  }
  return prepared.map(({ file, metadata }) => ({
    file,
    originalFile: file,
    encInfo: undefined,
    metadata,
  }));
}