// SPDX-FileCopyrightText: 2002-2023 PCSX2 Dev Team
// SPDX-License-Identifier: LGPL-3.0+

#include "MainWindow.h"
#include "QtHost.h"
#include "QtUtils.h"
#include "Settings/GamePatchSettingsWidget.h"
#include "SettingWidgetBinder.h"
#include "Settings/SettingsWindow.h"

#include "pcsx2/GameList.h"
#include "pcsx2/Patch.h"

#include "common/Assertions.h"

#include <algorithm>

GamePatchDetailsWidget::GamePatchDetailsWidget(std::string name, const std::string& author,
	const std::string& description, bool enabled, SettingsWindow* dialog, QWidget* parent)
	: QWidget(parent)
	, m_dialog(dialog)
	, m_name(name)
{
	m_ui.setupUi(this);

	m_ui.name->setText(QString::fromStdString(name));
	m_ui.description->setText(
		tr("<strong>Author: </strong>%1<br>%2")
			.arg(author.empty() ? tr("Unknown") : QString::fromStdString(author))
			.arg(description.empty() ? tr("No description provided.") : QString::fromStdString(description)));

	pxAssert(dialog->getSettingsInterface());
	m_ui.enabled->setChecked(enabled);
	connect(m_ui.enabled, &QCheckBox::stateChanged, this, &GamePatchDetailsWidget::onEnabledStateChanged);
}

GamePatchDetailsWidget::~GamePatchDetailsWidget() = default;

void GamePatchDetailsWidget::onEnabledStateChanged(int state)
{
	SettingsInterface* si = m_dialog->getSettingsInterface();
	if (state == Qt::Checked)
		si->AddToStringList("Patches", "Enable", m_name.c_str());
	else
		si->RemoveFromStringList("Patches", "Enable", m_name.c_str());

	si->Save();
	g_emu_thread->reloadGameSettings();
}

GamePatchSettingsWidget::GamePatchSettingsWidget(SettingsWindow* dialog, QWidget* parent)
	: m_dialog(dialog)
{
	m_ui.setupUi(this);
	m_ui.scrollArea->setFrameShape(QFrame::WinPanel);
	m_ui.scrollArea->setFrameShadow(QFrame::Sunken);

	setUnlabeledPatchesWarningVisibility(false);

	SettingsInterface* sif = m_dialog->getSettingsInterface();
	SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.allCRCsCheckbox, "EmuCore", "ShowPatchesForAllCRCs", false);

	connect(m_ui.reload, &QPushButton::clicked, this, &GamePatchSettingsWidget::onReloadClicked);
	connect(m_ui.allCRCsCheckbox, &QCheckBox::stateChanged, this, &GamePatchSettingsWidget::reloadList);

	dialog->registerWidgetHelp(m_ui.allCRCsCheckbox, tr("Show Patches For All CRCs"), tr("Checked"),
		tr("Toggles scanning patch files for all CRCs of the game. With this enabled available patches for the game serial with different CRCs will also be loaded."));

	reloadList();
}

GamePatchSettingsWidget::~GamePatchSettingsWidget() = default;

void GamePatchSettingsWidget::onReloadClicked()
{
	reloadList();

	// reload it on the emu thread too, so it picks up any changes
	g_emu_thread->reloadPatches();
}

void GamePatchSettingsWidget::disableAllPatches()
{
	SettingsInterface* si = m_dialog->getSettingsInterface();
	si->ClearSection(Patch::PATCHES_CONFIG_SECTION);
	si->Save();
}

void GamePatchSettingsWidget::reloadList()
{
	// Patches shouldn't have any unlabelled patch groups, because they're new.
	u32 number_of_unlabeled_patches = 0;
	bool showAllCRCS = m_ui.allCRCsCheckbox->isChecked();
	std::vector<Patch::PatchInfo> patches = Patch::GetPatchInfo(m_dialog->getSerial(), m_dialog->getDiscCRC(), false, showAllCRCS, &number_of_unlabeled_patches);
	std::vector<std::string> enabled_list =
		m_dialog->getSettingsInterface()->GetStringList(Patch::PATCHES_CONFIG_SECTION, Patch::PATCH_ENABLE_CONFIG_KEY);

	setUnlabeledPatchesWarningVisibility(number_of_unlabeled_patches > 0);
	delete m_ui.scrollArea->takeWidget();

	QWidget* container = new QWidget(m_ui.scrollArea);
	QVBoxLayout* layout = new QVBoxLayout(container);
	layout->setContentsMargins(0, 0, 0, 0);

	if (!patches.empty())
	{
		bool first = true;

		for (Patch::PatchInfo& pi : patches)
		{
			if (!first)
			{
				QFrame* frame = new QFrame(container);
				frame->setFrameShape(QFrame::HLine);
				frame->setFrameShadow(QFrame::Sunken);
				layout->addWidget(frame);
			}
			else
			{
				first = false;
			}

			const bool enabled = (std::find(enabled_list.begin(), enabled_list.end(), pi.name) != enabled_list.end());
			GamePatchDetailsWidget* it =
				new GamePatchDetailsWidget(std::move(pi.name), pi.author, pi.description, enabled, m_dialog, container);
			layout->addWidget(it);
		}
	}
	else
	{
		QLabel* label = new QLabel(tr("There are no patches available for this game."), container);
		layout->addWidget(label);
	}

	layout->addStretch(1);

	m_ui.scrollArea->setWidget(container);
}

void GamePatchSettingsWidget::setUnlabeledPatchesWarningVisibility(bool visible)
{
	m_ui.unlabeledPatchWarning->setVisible(visible);
}