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

#include <array>
#include <tuple>

#include "ui_configure_input_simple.h"
#include "yuzu/configuration/configure_input.h"
#include "yuzu/configuration/configure_input_player.h"
#include "yuzu/configuration/configure_input_simple.h"
#include "yuzu/uisettings.h"

namespace {

template <typename Dialog, typename... Args>
void CallConfigureDialog(ConfigureInputSimple* caller, Args&&... args) {
    caller->ApplyConfiguration();
    Dialog dialog(caller, std::forward<Args>(args)...);

    const auto res = dialog.exec();
    if (res == QDialog::Accepted) {
        dialog.ApplyConfiguration();
    }
}

// OnProfileSelect functions should (when applicable):
// - Set controller types
// - Set controller enabled
// - Set docked mode
// - Set advanced controller config/enabled (i.e. debug, kbd, mouse, touch)
//
// OnProfileSelect function should NOT however:
// - Reset any button mappings
// - Open any dialogs
// - Block in any way

constexpr std::size_t HANDHELD_INDEX = 8;

void HandheldOnProfileSelect() {
    Settings::values.players[HANDHELD_INDEX].connected = true;
    Settings::values.players[HANDHELD_INDEX].type = Settings::ControllerType::DualJoycon;

    for (std::size_t player = 0; player < HANDHELD_INDEX; ++player) {
        Settings::values.players[player].connected = false;
    }

    Settings::values.use_docked_mode = false;
    Settings::values.keyboard_enabled = false;
    Settings::values.mouse_enabled = false;
    Settings::values.debug_pad_enabled = false;
    Settings::values.touchscreen.enabled = true;
}

void DualJoyconsDockedOnProfileSelect() {
    Settings::values.players[0].connected = true;
    Settings::values.players[0].type = Settings::ControllerType::DualJoycon;

    for (std::size_t player = 1; player <= HANDHELD_INDEX; ++player) {
        Settings::values.players[player].connected = false;
    }

    Settings::values.use_docked_mode = true;
    Settings::values.keyboard_enabled = false;
    Settings::values.mouse_enabled = false;
    Settings::values.debug_pad_enabled = false;
    Settings::values.touchscreen.enabled = false;
}

// Name, OnProfileSelect (called when selected in drop down), OnConfigure (called when configure
// is clicked)
using InputProfile = std::tuple<const char*, void (*)(), void (*)(ConfigureInputSimple*)>;

constexpr std::array<InputProfile, 3> INPUT_PROFILES{{
    {QT_TR_NOOP("Single Player - Handheld - Undocked"), HandheldOnProfileSelect,
     [](ConfigureInputSimple* caller) {
         CallConfigureDialog<ConfigureInputPlayer>(caller, HANDHELD_INDEX, false);
     }},
    {QT_TR_NOOP("Single Player - Dual Joycons - Docked"), DualJoyconsDockedOnProfileSelect,
     [](ConfigureInputSimple* caller) {
         CallConfigureDialog<ConfigureInputPlayer>(caller, 1, false);
     }},
    {QT_TR_NOOP("Custom"), [] {}, CallConfigureDialog<ConfigureInput>},
}};

} // namespace

void ApplyInputProfileConfiguration(int profile_index) {
    std::get<1>(
        INPUT_PROFILES.at(std::min(profile_index, static_cast<int>(INPUT_PROFILES.size() - 1))))();
}

ConfigureInputSimple::ConfigureInputSimple(QWidget* parent)
    : QWidget(parent), ui(std::make_unique<Ui::ConfigureInputSimple>()) {
    ui->setupUi(this);

    for (const auto& profile : INPUT_PROFILES) {
        const QString label = tr(std::get<0>(profile));
        ui->profile_combobox->addItem(label, label);
    }

    connect(ui->profile_combobox, QOverload<int>::of(&QComboBox::currentIndexChanged), this,
            &ConfigureInputSimple::OnSelectProfile);
    connect(ui->profile_configure, &QPushButton::pressed, this, &ConfigureInputSimple::OnConfigure);

    LoadConfiguration();
}

ConfigureInputSimple::~ConfigureInputSimple() = default;

void ConfigureInputSimple::ApplyConfiguration() {
    auto index = ui->profile_combobox->currentIndex();
    // Make the stored index for "Custom" very large so that if new profiles are added it
    // doesn't change.
    if (index >= static_cast<int>(INPUT_PROFILES.size() - 1)) {
        index = std::numeric_limits<int>::max();
    }

    UISettings::values.profile_index = index;
}

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

    QWidget::changeEvent(event);
}

void ConfigureInputSimple::RetranslateUI() {
    ui->retranslateUi(this);
}

void ConfigureInputSimple::LoadConfiguration() {
    const auto index = UISettings::values.profile_index;
    if (index >= static_cast<int>(INPUT_PROFILES.size()) || index < 0) {
        ui->profile_combobox->setCurrentIndex(static_cast<int>(INPUT_PROFILES.size() - 1));
    } else {
        ui->profile_combobox->setCurrentIndex(index);
    }
}

void ConfigureInputSimple::OnSelectProfile(int index) {
    const auto old_docked = Settings::values.use_docked_mode;
    ApplyInputProfileConfiguration(index);
    OnDockedModeChanged(old_docked, Settings::values.use_docked_mode);
}

void ConfigureInputSimple::OnConfigure() {
    std::get<2>(INPUT_PROFILES.at(ui->profile_combobox->currentIndex()))(this);
}