import 'dart:async';
import 'dart:convert';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_ali_camera/camera_option.dart';

class FlutterAliCameraController {

  static const MethodChannel _channel =
      const MethodChannel('flutter_ali_camera');
  static const String viewType = "com.i2edu.cameraLib";
  final StreamController<Map> _recordController = StreamController.broadcast();
  Stream<Map> get recordUpdate => _recordController.stream;

  static Future<String> get platformVersion async {
    final String version = await _channel.invokeMethod('getPlatformVersion');
    return version;
  }

  static Future<void> initializeSdk() {
    return _channel.invokeMethod("initializeSdk");
  }

  Future<void> create({@required CameraRecordOption recordOption}) async {
    _channel.setMethodCallHandler(_onMethodCallHandler);
    return await _channel.invokeMethod("create", {"recordOption": recordOption.toMap()});
  }

  Widget buildView(VoidCallback onPlatformViewCreated) {
    return Platform.isAndroid
        ? AndroidView(
            viewType: viewType,
            creationParams: {},
            creationParamsCodec: const StandardMessageCodec(),
            onPlatformViewCreated: (id) => onPlatformViewCreated(),
          )
        : UiKitView(
            viewType: viewType,
            creationParams: {},
            creationParamsCodec: const StandardMessageCodec(),
            onPlatformViewCreated: (id) => onPlatformViewCreated(),
          );
  }

  Future<void> startPreview() {
    return _channel.invokeMethod("startPreview");
  }

  Future<void> stopPreview() {
    return _channel.invokeMethod("stopPreview");
  }

  Future<void> switchCamera() {
    return _channel.invokeMethod("switchCamera");
  }

  Future<void> setBeauty(int level) {
    return _channel.invokeMethod("setBeauty", {"level": level});
  }

  Future<void> setFilter(String path) {
    return _channel.invokeMethod("setFilter", {"path": path});
  }

  Future<void> startRecord(int max, String recordPath) {
    return _channel.invokeMethod("startRecord", {"max": max, "recordPath": recordPath});
  }

  Future<bool> startCompose(String outputPath, String bgmPath,
      List<String> paths, List<int> durations, CameraComposeOption option) {
    if (paths.length != durations.length) {
      print("error: length error");
      return null;
    }
    return _channel.invokeMethod("startCompose", {
      "outputPath": outputPath,
      "bgmPath": bgmPath,
      "paths": paths,
      "durations": durations,
      "composeOption": option.toMap()
    });
  }

  Future _onMethodCallHandler(MethodCall call) {
    print(call.arguments);
    switch (call.method) {
      case "recordUpdate":
        _recordController.add(call.arguments);
        break;
    }
    return null;
  }

  Future<void> dispose() async {
    return _channel.invokeMethod("onDestroy");
  }
}