// Copyright 2016 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#include <memory>
#include <QAbstractButton>
#include <QDialogButtonBox>
#include <QHash>
#include <QListWidgetItem>
#include <QPushButton>
#include <QSignalBlocker>
#include <QTabWidget>
#include "common/logging/log.h"
#include "common/settings.h"
#include "core/core.h"
#include "ui_configure.h"
#include "yuzu/configuration/config.h"
#include "yuzu/configuration/configure_audio.h"
#include "yuzu/configuration/configure_cpu.h"
#include "yuzu/configuration/configure_debug_tab.h"
#include "yuzu/configuration/configure_dialog.h"
#include "yuzu/configuration/configure_filesystem.h"
#include "yuzu/configuration/configure_general.h"
#include "yuzu/configuration/configure_graphics.h"
#include "yuzu/configuration/configure_graphics_advanced.h"
#include "yuzu/configuration/configure_hotkeys.h"
#include "yuzu/configuration/configure_input.h"
#include "yuzu/configuration/configure_input_player.h"
#include "yuzu/configuration/configure_network.h"
#include "yuzu/configuration/configure_profile_manager.h"
#include "yuzu/configuration/configure_system.h"
#include "yuzu/configuration/configure_ui.h"
#include "yuzu/configuration/configure_web.h"
#include "yuzu/hotkeys.h"

ConfigureDialog::ConfigureDialog(QWidget* parent, HotkeyRegistry& registry,
                                 InputCommon::InputSubsystem* input_subsystem,
                                 Core::System& system_)
    : QDialog(parent), ui{std::make_unique<Ui::ConfigureDialog>()},
      registry(registry), system{system_}, audio_tab{std::make_unique<ConfigureAudio>(system_,
                                                                                      this)},
      cpu_tab{std::make_unique<ConfigureCpu>(system_, this)},
      debug_tab_tab{std::make_unique<ConfigureDebugTab>(system_, this)},
      filesystem_tab{std::make_unique<ConfigureFilesystem>(this)},
      general_tab{std::make_unique<ConfigureGeneral>(system_, this)},
      graphics_tab{std::make_unique<ConfigureGraphics>(system_, this)},
      graphics_advanced_tab{std::make_unique<ConfigureGraphicsAdvanced>(system_, this)},
      hotkeys_tab{std::make_unique<ConfigureHotkeys>(this)},
      input_tab{std::make_unique<ConfigureInput>(system_, this)},
      network_tab{std::make_unique<ConfigureNetwork>(system_, this)},
      profile_tab{std::make_unique<ConfigureProfileManager>(system_, this)},
      system_tab{std::make_unique<ConfigureSystem>(system_, this)},
      ui_tab{std::make_unique<ConfigureUi>(system_, this)}, web_tab{std::make_unique<ConfigureWeb>(
                                                                this)} {
    Settings::SetConfiguringGlobal(true);

    ui->setupUi(this);

    ui->tabWidget->addTab(audio_tab.get(), tr("Audio"));
    ui->tabWidget->addTab(cpu_tab.get(), tr("CPU"));
    ui->tabWidget->addTab(debug_tab_tab.get(), tr("Debug"));
    ui->tabWidget->addTab(filesystem_tab.get(), tr("Filesystem"));
    ui->tabWidget->addTab(general_tab.get(), tr("General"));
    ui->tabWidget->addTab(graphics_tab.get(), tr("Graphics"));
    ui->tabWidget->addTab(graphics_advanced_tab.get(), tr("GraphicsAdvanced"));
    ui->tabWidget->addTab(hotkeys_tab.get(), tr("Hotkeys"));
    ui->tabWidget->addTab(input_tab.get(), tr("Controls"));
    ui->tabWidget->addTab(profile_tab.get(), tr("Profiles"));
    ui->tabWidget->addTab(network_tab.get(), tr("Network"));
    ui->tabWidget->addTab(system_tab.get(), tr("System"));
    ui->tabWidget->addTab(ui_tab.get(), tr("Game List"));
    ui->tabWidget->addTab(web_tab.get(), tr("Web"));

    hotkeys_tab->Populate(registry);
    setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);

    input_tab->Initialize(input_subsystem);

    general_tab->SetResetCallback([&] { this->close(); });

    SetConfiguration();
    PopulateSelectionList();

    connect(ui->tabWidget, &QTabWidget::currentChanged, this, [this](int index) {
        if (index != -1) {
            debug_tab_tab->SetCurrentIndex(0);
        }
    });
    connect(ui_tab.get(), &ConfigureUi::LanguageChanged, this, &ConfigureDialog::OnLanguageChanged);
    connect(ui->selectorList, &QListWidget::itemSelectionChanged, this,
            &ConfigureDialog::UpdateVisibleTabs);

    if (system.IsPoweredOn()) {
        QPushButton* apply_button = ui->buttonBox->addButton(QDialogButtonBox::Apply);
        connect(apply_button, &QAbstractButton::clicked, this,
                &ConfigureDialog::HandleApplyButtonClicked);
    }

    adjustSize();
    ui->selectorList->setCurrentRow(0);
}

ConfigureDialog::~ConfigureDialog() = default;

void ConfigureDialog::SetConfiguration() {}

void ConfigureDialog::ApplyConfiguration() {
    general_tab->ApplyConfiguration();
    ui_tab->ApplyConfiguration();
    system_tab->ApplyConfiguration();
    profile_tab->ApplyConfiguration();
    filesystem_tab->applyConfiguration();
    input_tab->ApplyConfiguration();
    hotkeys_tab->ApplyConfiguration(registry);
    cpu_tab->ApplyConfiguration();
    graphics_tab->ApplyConfiguration();
    graphics_advanced_tab->ApplyConfiguration();
    audio_tab->ApplyConfiguration();
    debug_tab_tab->ApplyConfiguration();
    web_tab->ApplyConfiguration();
    network_tab->ApplyConfiguration();
    system.ApplySettings();
    Settings::LogSettings();
}

void ConfigureDialog::changeEvent(QEvent* event) {
    if (event->type() == QEvent::LanguageChange) {
        RetranslateUI();
    }

    QDialog::changeEvent(event);
}

void ConfigureDialog::RetranslateUI() {
    const int old_row = ui->selectorList->currentRow();
    const int old_index = ui->tabWidget->currentIndex();

    ui->retranslateUi(this);

    PopulateSelectionList();
    ui->selectorList->setCurrentRow(old_row);

    UpdateVisibleTabs();
    ui->tabWidget->setCurrentIndex(old_index);
}

void ConfigureDialog::HandleApplyButtonClicked() {
    UISettings::values.configuration_applied = true;
    ApplyConfiguration();
}

Q_DECLARE_METATYPE(QList<QWidget*>);

void ConfigureDialog::PopulateSelectionList() {
    const std::array<std::pair<QString, QList<QWidget*>>, 6> items{
        {{tr("General"),
          {general_tab.get(), hotkeys_tab.get(), ui_tab.get(), web_tab.get(), debug_tab_tab.get()}},
         {tr("System"),
          {system_tab.get(), profile_tab.get(), network_tab.get(), filesystem_tab.get()}},
         {tr("CPU"), {cpu_tab.get()}},
         {tr("Graphics"), {graphics_tab.get(), graphics_advanced_tab.get()}},
         {tr("Audio"), {audio_tab.get()}},
         {tr("Controls"), input_tab->GetSubTabs()}},
    };

    [[maybe_unused]] const QSignalBlocker blocker(ui->selectorList);

    ui->selectorList->clear();
    for (const auto& entry : items) {
        auto* const item = new QListWidgetItem(entry.first);
        item->setData(Qt::UserRole, QVariant::fromValue(entry.second));

        ui->selectorList->addItem(item);
    }
}

void ConfigureDialog::OnLanguageChanged(const QString& locale) {
    emit LanguageChanged(locale);
    // first apply the configuration, and then restore the display
    ApplyConfiguration();
    RetranslateUI();
    SetConfiguration();
}

void ConfigureDialog::UpdateVisibleTabs() {
    const auto items = ui->selectorList->selectedItems();
    if (items.isEmpty()) {
        return;
    }

    [[maybe_unused]] const QSignalBlocker blocker(ui->tabWidget);

    ui->tabWidget->clear();

    const auto tabs = qvariant_cast<QList<QWidget*>>(items[0]->data(Qt::UserRole));

    for (auto* const tab : tabs) {
        LOG_DEBUG(Frontend, "{}", tab->accessibleName().toStdString());
        ui->tabWidget->addTab(tab, tab->accessibleName());
    }
}