// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT

import { invoke, Channel } from "@tauri-apps/api/core";
import { getCurrent } from "@tauri-apps/api/window";

interface ProgressPayload {
  progress: number;
  total: number;
}

type ProgressHandler = (progress: ProgressPayload) => void;

async function upload(
  url: string,
  filePath: string,
  progressHandler?: ProgressHandler,
  headers?: Map<string, string>
): Promise<void> {
  const ids = new Uint32Array(1);
  window.crypto.getRandomValues(ids);
  const id = ids[0];

  const onProgress = new Channel<ProgressPayload>();
  if (progressHandler != null) {
    onProgress.onmessage = progressHandler;
  }

  await invoke("plugin:upload|upload", {
    id,
    url,
    filePath,
    headers: headers ?? {},
    onProgress,
  });
}

/// Download file from given url.
///
/// Note that `filePath` currently must include the file name.
/// Furthermore the progress events will report a total length of 0 if the server did not sent a `Content-Length` header or if the file is compressed.
async function download(
  url: string,
  filePath: string,
  progressHandler?: ProgressHandler,
  headers?: Map<string, string>
): Promise<void> {
  const ids = new Uint32Array(1);
  window.crypto.getRandomValues(ids);
  const id = ids[0];

  const onProgress = new Channel<ProgressPayload>();
  if (progressHandler != null) {
    onProgress.onmessage = progressHandler;
  }

  await invoke("plugin:upload|download", {
    id,
    url,
    filePath,
    headers: headers ?? {},
    onProgress,
  });
}

export { download, upload };