// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:convert' show utf8, json;
import 'dart:isolate';
import 'dart:typed_data';
import 'dart:ui';

void main() {}

void nativeReportTimingsCallback(List<int> timings) native 'NativeReportTimingsCallback';
void nativeOnBeginFrame(int microseconds) native 'NativeOnBeginFrame';
void nativeOnPointerDataPacket(List<int> sequences) native 'NativeOnPointerDataPacket';

@pragma('vm:entry-point')
void reportTimingsMain() {
  window.onReportTimings = (List<FrameTiming> timings) {
    List<int> timestamps = [];
    for (FrameTiming t in timings) {
      for (FramePhase phase in FramePhase.values) {
        timestamps.add(t.timestampInMicroseconds(phase));
      }
    }
    nativeReportTimingsCallback(timestamps);
  };
}

@pragma('vm:entry-point')
void onBeginFrameMain() {
  window.onBeginFrame = (Duration beginTime) {
    nativeOnBeginFrame(beginTime.inMicroseconds);
  };
}

@pragma('vm:entry-point')
void onPointerDataPacketMain() {
  window.onPointerDataPacket = (PointerDataPacket packet) {
    List<int> sequence= <int>[];
    for (PointerData data in packet.data) {
      sequence.add(PointerChange.values.indexOf(data.change));
    }
    nativeOnPointerDataPacket(sequence);
  };
}

@pragma('vm:entry-point')
void emptyMain() {}

@pragma('vm:entry-point')
void reportMetrics() {
  window.onMetricsChanged = () {
    _reportMetrics(
      window.devicePixelRatio,
      window.physicalSize.width,
      window.physicalSize.height,
    );
  };
}

void _reportMetrics(double devicePixelRatio, double width, double height) native 'ReportMetrics';

@pragma('vm:entry-point')
void dummyReportTimingsMain() {
  window.onReportTimings = (List<FrameTiming> timings) {};
}

@pragma('vm:entry-point')
void fixturesAreFunctionalMain() {
  sayHiFromFixturesAreFunctionalMain();
}

void sayHiFromFixturesAreFunctionalMain() native 'SayHiFromFixturesAreFunctionalMain';

void notifyNative() native 'NotifyNative';

void secondaryIsolateMain(String message) {
  print('Secondary isolate got message: ' + message);
  notifyNative();
}

@pragma('vm:entry-point')
void testCanLaunchSecondaryIsolate() {
  Isolate.spawn(secondaryIsolateMain, 'Hello from root isolate.');
  notifyNative();
}

@pragma('vm:entry-point')
void testSkiaResourceCacheSendsResponse() {
  final PlatformMessageResponseCallback callback = (ByteData data) {
    if (data == null) {
      throw 'Response must not be null.';
    }
    final String response = utf8.decode(data.buffer.asUint8List());
    final List<bool> jsonResponse = json.decode(response).cast<bool>();
    if (jsonResponse[0] != true) {
      throw 'Response was not true';
    }
    notifyNative();
  };
  const String jsonRequest = '''{
                            "method": "Skia.setResourceCacheMaxBytes",
                            "args": 10000
                          }''';
  window.sendPlatformMessage(
    'flutter/skia',
    Uint8List.fromList(utf8.encode(jsonRequest)).buffer.asByteData(),
    callback,
  );
}

void notifyWidthHeight(int width, int height) native 'NotifyWidthHeight';

@pragma('vm:entry-point')
void canCreateImageFromDecompressedData() {
  const int imageWidth = 10;
  const int imageHeight = 10;
  final Uint8List pixels = Uint8List.fromList(List<int>.generate(
    imageWidth * imageHeight * 4,
    (int i) => i % 4 < 2 ? 0x00 : 0xFF,
  ));


  decodeImageFromPixels(
      pixels, imageWidth, imageHeight, PixelFormat.rgba8888,
      (Image image) {
    notifyWidthHeight(image.width, image.height);
  });
}

@pragma('vm:entry-point')
void canAccessIsolateLaunchData() {
  notifyMessage(utf8.decode(window.getPersistentIsolateData().buffer.asUint8List()));
}

void notifyMessage(String string) native 'NotifyMessage';

@pragma('vm:entry-point')
void canConvertMappings() {
  sendFixtureMapping(getFixtureMapping());
}

List<int> getFixtureMapping() native 'GetFixtureMapping';
void sendFixtureMapping(List<int> list) native 'SendFixtureMapping';

@pragma('vm:entry-point')
void canDecompressImageFromAsset() {
  decodeImageFromList(Uint8List.fromList(getFixtureImage()), (Image result) {
    notifyWidthHeight(result.width, result.height);
  });
}

List<int> getFixtureImage() native 'GetFixtureImage';

void notifyLocalTime(String string) native 'NotifyLocalTime';

@pragma('vm:entry-point')
void localtimesMatch() {
  final now = DateTime.now().toLocal();
  // This is: "$y-$m-$d $h:$min:$sec.$ms$us";
  final timeStr = now.toString();
  // Forward only "$y-$m-$d $h" for timestamp comparison.  Not using DateTime
  // formatting since package:intl is not available.
  notifyLocalTime(timeStr.split(":")[0]);
}

void notifyCanAccessResource(bool success) native 'NotifyCanAccessResource';

void notifySetAssetBundlePath() native 'NotifySetAssetBundlePath';

@pragma('vm:entry-point')
void canAccessResourceFromAssetDir() async {
  notifySetAssetBundlePath();
  window.sendPlatformMessage(
    'flutter/assets',
    Uint8List.fromList(utf8.encode('kernel_blob.bin')).buffer.asByteData(),
    (ByteData byteData) {
      notifyCanAccessResource(byteData != null);
    },
  );
}