#include "VideoCaptureInterfaceImpl.h"

#include "VideoCapturerInterface.h"
#include "Manager.h"
#include "MediaManager.h"
#include "platform/PlatformInterface.h"
#include "StaticThreads.h"

namespace tgcalls {

VideoCaptureInterfaceObject::VideoCaptureInterfaceObject(std::string deviceId, bool isScreenCapture, std::shared_ptr<PlatformContext> platformContext, Threads &threads)
: _videoSource(PlatformInterface::SharedInstance()->makeVideoSource(threads.getMediaThread(), threads.getWorkerThread())) {
	_platformContext = platformContext;

	switchToDevice(deviceId, isScreenCapture);
}

VideoCaptureInterfaceObject::~VideoCaptureInterfaceObject() {
	if (_videoCapturer) {
		_videoCapturer->setUncroppedOutput(nullptr);
	}
}

rtc::scoped_refptr<webrtc::VideoTrackSourceInterface> VideoCaptureInterfaceObject::source() {
	return _videoSource;
}

int VideoCaptureInterfaceObject::getRotation() {
    if (_videoCapturer) {
        return _videoCapturer->getRotation();
    } else {
        return 0;
    }
}

bool VideoCaptureInterfaceObject::isScreenCapture() {
    return _isScreenCapture;
}

void VideoCaptureInterfaceObject::switchToDevice(std::string deviceId, bool isScreenCapture) {
    if (_videoCapturer) {
		_videoCapturer->setUncroppedOutput(nullptr);
    }
    _isScreenCapture = isScreenCapture;
	if (_videoSource) {
        //this should outlive the capturer
        _videoCapturer = nullptr;
		_videoCapturer = PlatformInterface::SharedInstance()->makeVideoCapturer(_videoSource, deviceId, [this](VideoState state) {
			if (this->_stateUpdated) {
				this->_stateUpdated(state);
			}
            if (this->_onIsActiveUpdated) {
                switch (state) {
                    case VideoState::Active: {
                        this->_onIsActiveUpdated(true);
                        break;
                    }
                    default: {
                        this->_onIsActiveUpdated(false);
                        break;
                    }
                }
            }
        }, [this](PlatformCaptureInfo info) {
            if (this->_shouldBeAdaptedToReceiverAspectRate != info.shouldBeAdaptedToReceiverAspectRate) {
                this->_shouldBeAdaptedToReceiverAspectRate = info.shouldBeAdaptedToReceiverAspectRate;
            }
            if (this->_rotationUpdated) {
                this->_rotationUpdated(info.rotation);
            }
            this->updateAspectRateAdaptation();
        }, _platformContext, _videoCapturerResolution);
	}
	if (_videoCapturer) {
		if (_preferredAspectRatio > 0) {
			_videoCapturer->setPreferredCaptureAspectRatio(_preferredAspectRatio);
		}
		if (const auto currentUncroppedSink = _currentUncroppedSink.lock()) {
			_videoCapturer->setUncroppedOutput(currentUncroppedSink);
		}
        if (_onFatalError) {
            _videoCapturer->setOnFatalError(_onFatalError);
        }
        if (_onPause) {
            _videoCapturer->setOnPause(_onPause);
        }
		_videoCapturer->setState(_state);
	}
}

void VideoCaptureInterfaceObject::withNativeImplementation(std::function<void(void *)> completion) {
    if (_videoCapturer) {
        _videoCapturer->withNativeImplementation(completion);
    } else {
        completion(nullptr);
    }
}

void VideoCaptureInterfaceObject::setState(VideoState state) {
	if (_state != state) {
		_state = state;
		if (_videoCapturer) {
			_videoCapturer->setState(state);
		}
	}
}

void VideoCaptureInterfaceObject::setPreferredAspectRatio(float aspectRatio) {
    _preferredAspectRatio = aspectRatio;
    updateAspectRateAdaptation();
}

void VideoCaptureInterfaceObject::updateAspectRateAdaptation() {
    if (_videoCapturer) {
        if (_videoCapturerResolution.first != 0 && _videoCapturerResolution.second != 0) {
            if (_preferredAspectRatio > 0.01 && _shouldBeAdaptedToReceiverAspectRate) {
                float originalWidth = (float)_videoCapturerResolution.first;
                float originalHeight = (float)_videoCapturerResolution.second;

                float aspectRatio = _preferredAspectRatio;

                float width = (originalWidth > aspectRatio * originalHeight)
                    ? int(std::round(aspectRatio * originalHeight))
                    : originalWidth;
                float height = (originalWidth > aspectRatio * originalHeight)
                    ? originalHeight
                    : int(std::round(originalHeight / aspectRatio));

                PlatformInterface::SharedInstance()->adaptVideoSource(_videoSource, (int)width, (int)height, 25);
            } else {
                PlatformInterface::SharedInstance()->adaptVideoSource(_videoSource, _videoCapturerResolution.first, _videoCapturerResolution.second, 25);
            }
        }
    }
}

void VideoCaptureInterfaceObject::setOutput(std::shared_ptr<rtc::VideoSinkInterface<webrtc::VideoFrame>> sink) {
	if (_videoCapturer) {
		_videoCapturer->setUncroppedOutput(sink);
	}
	_currentUncroppedSink = sink;
}

void VideoCaptureInterfaceObject::setOnFatalError(std::function<void()> error) {
    if (_videoCapturer) {
        _videoCapturer->setOnFatalError(error);
    }
    _onFatalError = error;
}
void VideoCaptureInterfaceObject::setOnPause(std::function<void(bool)> pause) {
    if (_videoCapturer) {
        _videoCapturer->setOnPause(pause);
    }
    _onPause = pause;
}

void VideoCaptureInterfaceObject::setOnIsActiveUpdated(std::function<void(bool)> onIsActiveUpdated) {
    _onIsActiveUpdated = onIsActiveUpdated;
}

void VideoCaptureInterfaceObject::setStateUpdated(std::function<void(VideoState)> stateUpdated) {
	_stateUpdated = stateUpdated;
}

void VideoCaptureInterfaceObject::setRotationUpdated(std::function<void(int)> rotationUpdated) {
    _rotationUpdated = rotationUpdated;
}

VideoCaptureInterfaceImpl::VideoCaptureInterfaceImpl(std::string deviceId, bool isScreenCapture, std::shared_ptr<PlatformContext> platformContext, std::shared_ptr<Threads> threads) :
_impl(threads->getMediaThread(), [deviceId, isScreenCapture, platformContext, threads]() {
	return std::make_shared<VideoCaptureInterfaceObject>(deviceId, isScreenCapture, platformContext, *threads);
}) {
}

VideoCaptureInterfaceImpl::~VideoCaptureInterfaceImpl() = default;

void VideoCaptureInterfaceImpl::switchToDevice(std::string deviceId, bool isScreenCapture) {
	_impl.perform([deviceId, isScreenCapture](VideoCaptureInterfaceObject *impl) {
		impl->switchToDevice(deviceId, isScreenCapture);
	});
}

void VideoCaptureInterfaceImpl::withNativeImplementation(std::function<void(void *)> completion) {
    _impl.perform([completion](VideoCaptureInterfaceObject *impl) {
        impl->withNativeImplementation(completion);
    });
}

void VideoCaptureInterfaceImpl::setState(VideoState state) {
	_impl.perform([state](VideoCaptureInterfaceObject *impl) {
		impl->setState(state);
	});
}

void VideoCaptureInterfaceImpl::setPreferredAspectRatio(float aspectRatio) {
    _impl.perform([aspectRatio](VideoCaptureInterfaceObject *impl) {
        impl->setPreferredAspectRatio(aspectRatio);
    });
}
void VideoCaptureInterfaceImpl::setOnFatalError(std::function<void()> error) {
    _impl.perform([error](VideoCaptureInterfaceObject *impl) {
        impl->setOnFatalError(error);
    });
}
void VideoCaptureInterfaceImpl::setOnPause(std::function<void(bool)> pause) {
    _impl.perform([pause](VideoCaptureInterfaceObject *impl) {
        impl->setOnPause(pause);
    });
}

void VideoCaptureInterfaceImpl::setOnIsActiveUpdated(std::function<void(bool)> onIsActiveUpdated) {
    _impl.perform([onIsActiveUpdated](VideoCaptureInterfaceObject *impl) {
        impl->setOnIsActiveUpdated(onIsActiveUpdated);
    });
}

void VideoCaptureInterfaceImpl::setOutput(std::shared_ptr<rtc::VideoSinkInterface<webrtc::VideoFrame>> sink) {
	_impl.perform([sink](VideoCaptureInterfaceObject *impl) {
		impl->setOutput(sink);
	});
}

ThreadLocalObject<VideoCaptureInterfaceObject> *VideoCaptureInterfaceImpl::object() {
	return &_impl;
}

} // namespace tgcalls
