#include "MainWindow.h"
#include "bank/AccountWindow.h"

#include <QLabel>
#include <QPixmap>
#include <QResizeEvent>
#include <QScrollArea>
#include <QMenuBar>
#include <QStackedWidget>

#include "TutorialWindow.h"
#include "bank/BankListWindow.h"
#include "event/EventWindow.h"
#include "log/LogWindow.h"
#include "log/FileLogWindow.h"
#include "db/DeviceInfo.h"
#include "device/DeviceWidget.h"
#include "dao/DeviceDAO.h"
#include "dao/SettingsDAO.h"
#include <QTimer>
#include <QCoreApplication>
#include "widget/common/FlowLayout.h"

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) {
    setWindowTitle("ARC");

    // Инициализируем таймер обновления
    timer = new QTimer(this);
    connect(timer, &QTimer::timeout, this, &MainWindow::loadDevices);

    stackedWidget = new QStackedWidget(this);
    setCentralWidget(stackedWidget);

    createDevicePage();
    stackedWidget->addWidget(m_devicesWindow);
    stackedWidget->setCurrentWidget(m_devicesWindow);

    // FIXME переделать на ленивое создание
    // m_accountsWindow = new AccountWindow(this);
    // stackedWidget->addWidget(m_accountsWindow);
    // stackedWidget->setCurrentWidget(accountPage);

    resize(800, 600);

    // Работа с меню
    QMenu *menu = menuBar()->addMenu("Меню");
    auto *devicesPageAction = new QAction("Активные устройства", this);
    // auto *accountPageAction = new QAction("Аккаунты", this);
    auto *bankListAction = new QAction("Банки", this);
    auto *tutorialPageAction = new QAction("Инструкция", this);
    auto *eventAction = new QAction("События", this);
    auto *errorLogAction = new QAction("Ошибки", this);
    auto *fileLogAction = new QAction("Логи", this);
    menu->addAction(devicesPageAction);
    // menu->addAction(accountPageAction);
    menu->addAction(bankListAction);
    menu->addAction(eventAction);
    menu->addAction(tutorialPageAction);
    menu->addAction(errorLogAction);
    menu->addAction(fileLogAction);

    connect(devicesPageAction, &QAction::triggered, this, [=]() {
        if (!m_devicesWindow) {
            createDevicePage();
        }
        stackedWidget->setCurrentWidget(m_devicesWindow);
    });

    // connect(accountPageAction, &QAction::triggered, this, [=]() {
    //     stackedWidget->setCurrentWidget(m_accountsWindow);
    //     deleteDevicePage(); // освобождаем ресурсы
    // });

    connect(bankListAction, &QAction::triggered, this, [=]() {
        if (!m_bankListWindow) {
            m_bankListWindow = new BankListWindow(this);
        }
        m_bankListWindow->show();
        m_bankListWindow->raise();
        m_bankListWindow->activateWindow();
    });

    connect(tutorialPageAction, &QAction::triggered, this, [=]() {
        if (!m_tutorialWindow) {
            m_tutorialWindow = new TutorialWindow(this);
        }
        m_tutorialWindow->show();
        m_tutorialWindow->raise();
        m_tutorialWindow->activateWindow();
    });

    connect(eventAction, &QAction::triggered, this, [=]() {
        if (!m_eventWindow) {
            m_eventWindow = new EventWindow(this);
        }
        m_eventWindow->show();
        m_eventWindow->raise();
        m_eventWindow->activateWindow();
    });

    connect(errorLogAction, &QAction::triggered, this, [=]() {
        if (!m_logWindow) {
            m_logWindow = new LogWindow(this);
        }
        m_logWindow->show();
        m_logWindow->raise();
        m_logWindow->activateWindow();
    });

    connect(fileLogAction, &QAction::triggered, this, [=]() {
        if (!m_fileLogWindow) {
            m_fileLogWindow = new FileLogWindow(this);
        }
        m_fileLogWindow->show();
        m_fileLogWindow->raise();
        m_fileLogWindow->activateWindow();
    });

    if (SettingsDAO::get("tutorial_shown").isEmpty()) {
        QTimer::singleShot(0, this, [this]() {
            m_tutorialWindow = new TutorialWindow(this);
            m_tutorialWindow->show();
            m_tutorialWindow->raise();
            m_tutorialWindow->activateWindow();
            SettingsDAO::set("tutorial_shown", "1");
        });
    }
}


void MainWindow::createDevicePage() {
    if (m_devicesWindow) {
        return;
    }

    auto *container = new QWidget(this);
    auto *containerLayout = new QVBoxLayout(container);
    containerLayout->setContentsMargins(0, 0, 0, 0);

    m_noDevicesLabel = new QLabel(container);
    m_noDevicesPixmap = QPixmap(QCoreApplication::applicationDirPath() + "/no_devices.png");
    m_noDevicesLabel->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
    m_noDevicesLabel->setAlignment(Qt::AlignCenter);
    containerLayout->addWidget(m_noDevicesLabel);

    m_scrollArea = new QScrollArea(container);
    auto *contentWidget = new QWidget;
    flowLayout = new FlowLayout(contentWidget, 0, 0, 0);

    QVector<DeviceInfo> devices = DeviceDAO::getAllDevices(false);
    for (const auto &device: devices) {
        flowLayout->addWidget(new DeviceWidget(device));
    }

    contentWidget->setLayout(flowLayout);
    static_cast<QScrollArea*>(m_scrollArea)->setWidget(contentWidget);
    static_cast<QScrollArea*>(m_scrollArea)->setWidgetResizable(true);
    containerLayout->addWidget(m_scrollArea);

    m_noDevicesLabel->setVisible(devices.isEmpty());
    m_scrollArea->setVisible(!devices.isEmpty());

    m_devicesWindow = container;
    stackedWidget->addWidget(m_devicesWindow);

    timer->start(1000);

    if (devices.isEmpty()) {
        QTimer::singleShot(0, this, [this]() {
            if (m_noDevicesLabel && !m_noDevicesPixmap.isNull()) {
                m_noDevicesLabel->setPixmap(m_noDevicesPixmap.scaled(
                    m_noDevicesLabel->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation));
            }
        });
    }
}

void MainWindow::deleteDevicePage() {
    if (!m_devicesWindow) {
        return;
    }

    timer->stop();

    stackedWidget->removeWidget(m_devicesWindow);
    m_devicesWindow->deleteLater();
    m_devicesWindow = nullptr;
    flowLayout = nullptr;
}

/**
 * Однако, в нем вы вызываете delete для элементов, что изменяет память.
 * Для того, чтобы не нарушать константность, этот метод должен быть неконстантным (без const в сигнатуре).
 */
void MainWindow::loadDevices() {
    const auto devices = DeviceDAO::getAllDevices(false);
    // Очистить старые виджеты
    QLayoutItem *item;
    while ((item = flowLayout->takeAt(0)) != nullptr) {
        if (item->widget()) {
            item->widget()->deleteLater();
        }
        delete item;
    }
    // Добавляем новые виджеты для каждого устройства
    for (const auto &device: devices) {
        flowLayout->addWidget(new DeviceWidget(device));
    }

    m_noDevicesLabel->setVisible(devices.isEmpty());
    m_scrollArea->setVisible(!devices.isEmpty());
}

void MainWindow::resizeEvent(QResizeEvent *event) {
    QMainWindow::resizeEvent(event);
    if (m_noDevicesLabel && m_noDevicesLabel->isVisible() && !m_noDevicesPixmap.isNull()) {
        m_noDevicesLabel->setPixmap(m_noDevicesPixmap.scaled(
            m_noDevicesLabel->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation));
    }
}