import * as util from 'ionic/util';

import {NativePlugin} from '../plugin';

/**
 * Take a photo or capture video.
 *
 * Requires Cordova plugin: `cordova-plugin-camera`. For more info, please see the [Cordova Camera Plugin Docs](https://github.com/apache/cordova-plugin-camera).
 *
 * @usage
 * ```js
 * Camera.getPicture(options).then((imageData) => {
 *  // imageData is either a base64 encoded string or a file URI
 *  // If it's base64:
 *  let base64Image = "data:image/jpeg;base64," + imageData;
 * }, (err) => {
 * });
 * ```
 */
@NativePlugin({
  name: 'Camera',
  platforms: ['ios', 'android'],
  engines: {
    cordova: 'cordova-plugin-camera'
  },
  pluginCheck: () => {
    return !!navigator.camera;
  }
})
export class Camera {
  /**
   * Let the user take a photo or capture video.
   *
   * @param options {object} options for the photo. Of the form (with defaults):
   * {
   *  quality: 80,
   *  destinationType: window.Camera.DestinationType.DATA_URL,
   *  sourceType: window.Camera.PictureSourceType.CAMERA (VIDEO or ALLMEDIA for both),
   *  allowEdit: true,
   *  encodingType: window.Camera.EncodingType.JPEG,
   *  popoverOptions: window.CameraPopoverOptions,
   *  saveToPhotoAlbum: false
   * }
   * @return {Promise} resolving with data or rejecting on error
   */
  static getPicture(options) {
    return new Promise((resolve, reject) => {
      if (!navigator.camera) {
        this.pluginWarn();
        resolve(null);
        return;
      }

      var options = util.defaults({
        quality: 80,
        destinationType: window.Camera.DestinationType.DATA_URL,
        sourceType: window.Camera.PictureSourceType.CAMERA,
        allowEdit: true,
        encodingType: window.Camera.EncodingType.JPEG,
        popoverOptions: window.CameraPopoverOptions,
        saveToPhotoAlbum: false
      }, options);

      navigator.camera.getPicture(function (imageData) {
        resolve(imageData);
      }, function (err) {
        reject(err);
      }, options);
    });
  }

  /**
   * If using FILE_URI and taking photos, photos will be stored temporarily. To
   * remove them, call cleanup when the camera session is finished.
   * @return {Promise}
   */
  static cleanup() {
    return new Promise((resolve, reject) => {
      navigator.camera.cleanup(function () {
        resolve();
      }, function (err) {
        reject(err);
      });
    });
  }
}