#include <utility>
#include <QObject>
#include <QFileDialog>
#include <QMessageBox>
#include <QHash>
#include <QImage>
#include <QThreadPool>
#include <QTableWidgetItem>
#include "ui_taskwindow.h"

#include <taskwindow.h>
#include <tmslayer.h>
#include <network.h>
#include <imgwriter.h>
#include <tmsprovider.h>
#pragma execution_character_set("utf-8")

namespace LAMPMainWidget
{
	void DownloadTask::run()
	{
		auto currentLayer = dynamic_cast<const TmsLayer*>(mTaskInfo.layer);
		auto provider = dynamic_cast<const TmsProvider*>(&currentLayer->provider());
		auto tileSize = provider->tileSize();

		QHash<QPoint, QString> tiles{};
		QSize imgSize{};
		if (!currentLayer->parseTiles(mTaskInfo.extent, mTaskInfo.zoom, tiles, imgSize)) {
			qCritical() << "瓦片路径解析错误";
			generateErrorRow();
			return;
		}
		generateSuccessRow();

		ImgWriter imgWriter{ mTaskInfo.taskPath, imgSize };
		QByteArray tileData{};
		Network web{};
		auto item = tiles.constBegin();
		auto count = tiles.count();
		int completed{ 0 };
		for (; item != tiles.constEnd(); ++item) {
			tileData = web.httpsRequest(item.value());
			if (tileData.isEmpty()) {
				qCritical() << item.value() << "下载数据为空";
				return;
			}
			++completed;
			auto pos = QPoint(item.key().x() * tileSize.width(), item.key().y() * tileSize.height());
			if (!imgWriter.write(pos, tileData)) {
				qCritical() << "瓦片写出失败";
			}
			double progress = static_cast<double>(completed) / count;
			auto progessStr = QString("%1").arg(progress * 100);
			mTaskInfo.display->takeItem(mRowId, 4);
			mTaskInfo.display->setItem(mRowId, 4, new QTableWidgetItem(QString("%1").arg(progress * 100)));
			// mTaskInfo.display->resizeColumnsToContents();
			// mTaskInfo.display->horizontalHeader()->setStretchLastSection(true);
		}
	}

	void DownloadTask::generateCommonRow()
	{
		auto provider = dynamic_cast<const TmsProvider*>(&mTaskInfo.layer->provider());
		mRowId = mTaskInfo.display->rowCount();
		mTaskInfo.display->insertRow(mRowId);
		mTaskInfo.display->setItem(mRowId, 0, new QTableWidgetItem(mTaskInfo.taskName));
		mTaskInfo.display->setItem(mRowId, 1, new QTableWidgetItem(getExtentStr()));
		mTaskInfo.display->setItem(mRowId, 2, new QTableWidgetItem(QString("%1").arg(mTaskInfo.zoom)));
		mTaskInfo.display->setItem(mRowId, 3, new QTableWidgetItem(provider->id()));
	}

	void DownloadTask::generateErrorRow()
	{
		generateCommonRow();
		mTaskInfo.display->setItem(mRowId, 4, new QTableWidgetItem("任务新建失败"));
		mTaskInfo.display->resizeColumnsToContents();
	}

	void DownloadTask::generateSuccessRow()
	{
		generateCommonRow();
		mTaskInfo.display->setItem(mRowId, 4, new QTableWidgetItem("0.0%"));
		mTaskInfo.display->resizeColumnsToContents();
	}

	QString DownloadTask::getExtentStr()
	{
		auto leftTop = mTaskInfo.extent.topLeft();
		auto rightBottom = mTaskInfo.extent.bottomRight();
		return QString("[%1, %2], [%3, %4]").arg(leftTop.x()).arg(leftTop.y())
			.arg(rightBottom.x()).arg(rightBottom.y());
	}

	TaskWindow::TaskWindow(QWidget* parent)
		: mUi(new Ui::TaskWindow),
		mParent(dynamic_cast<RasterMainWidget*>(parent)),
		mSavePath(),
		QDialog(parent)
	{
		mUi->setupUi(this);
		setupWindow();
		setupAction();
	}

	TaskWindow::~TaskWindow()
	{
		delete mUi;
	}

	void TaskWindow::setupWindow()
	{
		setFixedSize(size());
		auto currentLayer = dynamic_cast<const TmsLayer*>(mParent->mMapConvas->currentLayer());

		auto minZoom = currentLayer->minZoom();
		auto maxZoom = currentLayer->maxZoom();
		for (auto i = minZoom; i <= maxZoom; ++i) {
			mUi->zoomValueCbx->addItem(QString("%1").arg(i), i);
		}
		mUi->leftTopText->setText(
			QString("%1, %2").arg(mParent->mLeftTop.x()).arg(mParent->mLeftTop.y()));
		mUi->rightBottomText->setText(
			QString("%1, %2").arg(mParent->mRightBottom.x()).arg(mParent->mRightBottom.y()));
	}

	void TaskWindow::setupAction()
	{
		QObject::connect(mUi->exitBtn, &QPushButton::clicked, this, &TaskWindow::close);
		QObject::connect(mUi->createBtn, &QPushButton::clicked, this, &TaskWindow::createTask);
		QObject::connect(mUi->saveDirBtn, &QPushButton::clicked, this, &TaskWindow::setupSaveDir);
		QObject::connect(mUi->taskNameText, &QLineEdit::textChanged, this, &TaskWindow::setupTaskName);
		QObject::connect(mUi->zoomValueCbx, QOverload<int>::of(&QComboBox::currentIndexChanged),
			this, &TaskWindow::setupZoomValue);
	}

	void TaskWindow::createTask()
	{
		if (!taskInfoCheck()) {
			return;
		}

		mSavePath.append("/").append(mTaskName).append(".tiff");
		auto savePath = QDir::toNativeSeparators(mSavePath);
		auto extent = QRectF(QPointF(mParent->mLeftTop.x(), mParent->mLeftTop.y()),
			QPointF(mParent->mRightBottom.x(), mParent->mRightBottom.y()));
		auto tileInfo = TaskInfo{ mTaskName, savePath, extent,
		   mZoomValue,
		   mParent->mMapConvas->currentLayer(),
		   mParent->getTaskTable()
			/*mParent->mUi->taskTable*/ };

		auto task = new DownloadTask(tileInfo);
		QThreadPool::globalInstance()->start(task);
		close();
	}

	void TaskWindow::setupSaveDir()
	{
		auto saveDir = QFileDialog::getExistingDirectory(dynamic_cast<QWidget*>(this), "存储路径选择");
		if (saveDir.isEmpty()) {
			qWarning() << u8"未选择存储路径";
			return;
		}

		mSavePath = saveDir;
		mUi->saveDirText->setText(mSavePath);
	}

	void TaskWindow::setupTaskName(const QString& text)
	{
		qWarning() << u8"任务名=>" << text;
		mTaskName = text;
	}

	bool TaskWindow::taskInfoCheck()
	{
		if (mTaskName.isEmpty()) {
			QMessageBox::critical(dynamic_cast<QWidget*>(this), "错误", "任务名称为空");
			return false;
		}

		if (mSavePath.isEmpty()) {
			QMessageBox::critical(dynamic_cast<QWidget*>(this), "错误", "存储路径为空");
			return false;
		}

		return true;
	}

	void TaskWindow::setupZoomValue(int index)
	{
		auto zoom = mUi->zoomValueCbx->itemData(index).toInt();
		qWarning() << u8"设置下载任务zoom值=>" << zoom;
		mZoomValue = zoom;
	}
}