#include "ImgurUpload.h"

#include <QNetworkRequest>
#include <QHttpMultiPart>
#include <QJsonDocument>
#include <QJsonObject>
#include <QHttpPart>
#include <QFile>
#include <QUrl>

#include "net/URLConstants.h"
#include "Env.h"
#include <QDebug>

ImgurUpload::ImgurUpload(ScreenshotPtr shot) : NetAction(), m_shot(shot)
{
	m_url = URLConstants::IMGUR_BASE_URL + "upload.json";
	m_status = Status::NotStarted;
}

void ImgurUpload::executeTask()
{
	finished = false;
	m_status = Status::InProgress;
	QNetworkRequest request(m_url);
	request.setHeader(QNetworkRequest::UserAgentHeader, "MultiMC/5.0 (Uncached)");
	request.setRawHeader("Authorization", "Client-ID 5b97b0713fba4a3");
	request.setRawHeader("Accept", "application/json");

	QFile f(m_shot->m_file.absoluteFilePath());
	if (!f.open(QFile::ReadOnly))
	{
		emit failed();
		return;
	}

	QHttpMultiPart *multipart = new QHttpMultiPart(QHttpMultiPart::FormDataType);
	QHttpPart filePart;
	filePart.setBody(f.readAll().toBase64());
	filePart.setHeader(QNetworkRequest::ContentTypeHeader, "image/png");
	filePart.setHeader(QNetworkRequest::ContentDispositionHeader, "form-data; name=\"image\"");
	multipart->append(filePart);
	QHttpPart typePart;
	typePart.setHeader(QNetworkRequest::ContentDispositionHeader, "form-data; name=\"type\"");
	typePart.setBody("base64");
	multipart->append(typePart);
	QHttpPart namePart;
	namePart.setHeader(QNetworkRequest::ContentDispositionHeader, "form-data; name=\"name\"");
	namePart.setBody(m_shot->m_file.baseName().toUtf8());
	multipart->append(namePart);

	QNetworkReply *rep = ENV.qnam().post(request, multipart);

	m_reply.reset(rep);
	connect(rep, &QNetworkReply::uploadProgress, this, &ImgurUpload::downloadProgress);
	connect(rep, &QNetworkReply::finished, this, &ImgurUpload::downloadFinished);
	connect(rep, SIGNAL(error(QNetworkReply::NetworkError)),
			SLOT(downloadError(QNetworkReply::NetworkError)));
}
void ImgurUpload::downloadError(QNetworkReply::NetworkError error)
{
	qCritical() << "ImgurUpload failed with error" << m_reply->errorString() << "Server reply:\n" << m_reply->readAll();
	if(finished)
	{
		qCritical() << "Double finished ImgurUpload!";
		return;
	}
	m_status = Status::Failed;
	finished = true;
	m_reply.reset();
	emit failed();
}
void ImgurUpload::downloadFinished()
{
	if(finished)
	{
		qCritical() << "Double finished ImgurUpload!";
		return;
	}
	QByteArray data = m_reply->readAll();
	m_reply.reset();
	QJsonParseError jsonError;
	QJsonDocument doc = QJsonDocument::fromJson(data, &jsonError);
	if (jsonError.error != QJsonParseError::NoError)
	{
		qDebug() << "imgur server did not reply with JSON" << jsonError.errorString();
		finished = true;
		m_reply.reset();
		emit failed();
		return;
	}
	auto object = doc.object();
	if (!object.value("success").toBool())
	{
		qDebug() << "Screenshot upload not successful:" << doc.toJson();
		finished = true;
		m_reply.reset();
		emit failed();
		return;
	}
	m_shot->m_imgurId = object.value("data").toObject().value("id").toString();
	m_shot->m_url = object.value("data").toObject().value("link").toString();
	m_status = Status::Finished;
	finished = true;
	emit succeeded();
	return;
}
void ImgurUpload::downloadProgress(qint64 bytesReceived, qint64 bytesTotal)
{
	m_progressTotal = bytesTotal;
	m_progress = bytesReceived;
	emit progress(bytesReceived, bytesTotal);
}