#include "FileLogWindow.h"

#include <QCoreApplication>
#include <QDir>
#include <QFile>
#include <QHBoxLayout>
#include <QHeaderView>
#include <QHttpMultiPart>
#include <QMessageBox>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QSslSocket>
#include <QProcess>
#include <QTemporaryFile>
#include <QPixmap>
#include <QVBoxLayout>

#include "dao/EventDAO.h"
#include "dao/GeneralLogDAO.h"
#include "dao/SettingsDAO.h"
#include "log/LogDetailWindow.h"

static constexpr int COL_ID      = 0;
static constexpr int COL_TIME    = 1;
static constexpr int COL_LEVEL   = 2;
static constexpr int COL_SOURCE  = 3;
static constexpr int COL_MESSAGE = 4;

FileLogWindow::FileLogWindow(QWidget *parent) : QDialog(parent) {
    setWindowTitle("Логи");
    resize(1200, 650);

    m_table = new QTableWidget(this);
    m_table->setColumnCount(5);
    m_table->setHorizontalHeaderLabels({"#", "Время", "Уровень", "Источник", "Сообщение"});
    m_table->setEditTriggers(QAbstractItemView::NoEditTriggers);
    m_table->setSelectionBehavior(QAbstractItemView::SelectRows);
    m_table->setSelectionMode(QAbstractItemView::SingleSelection);
    m_table->verticalHeader()->hide();
    m_table->horizontalHeader()->setStretchLastSection(true);
    m_table->setColumnWidth(COL_ID,     45);
    m_table->setColumnWidth(COL_TIME,   145);
    m_table->setColumnWidth(COL_LEVEL,  80);
    m_table->setColumnWidth(COL_SOURCE, 250);

    // Панель скриншота
    m_screenshotLabel = new QLabel(this);
    m_screenshotLabel->setAlignment(Qt::AlignCenter);
    m_screenshotLabel->setMinimumWidth(300);
    m_screenshotLabel->setStyleSheet("background-color: #f0f0f0; border: 1px solid #ccc;");
    m_screenshotLabel->setText("Выберите запись\nдля просмотра скриншота");

    auto *splitter = new QSplitter(Qt::Horizontal, this);
    splitter->addWidget(m_table);
    splitter->addWidget(m_screenshotLabel);
    splitter->setStretchFactor(0, 3);
    splitter->setStretchFactor(1, 1);

    m_showAllCheck = new QCheckBox("Показать все (включая DEBUG/INFO)", this);

    m_prevBtn   = new QPushButton("←", this);
    m_nextBtn   = new QPushButton("→", this);
    m_pageLabel = new QLabel(this);
    m_pageLabel->setAlignment(Qt::AlignCenter);
    m_pageLabel->setMinimumWidth(140);

    auto *refreshBtn = new QPushButton("Обновить", this);
    m_sendBtn = new QPushButton("Отправить", this);
    m_sendBtn->setStyleSheet("background-color: #0088cc; color: white; border-radius: 4px; padding: 4px 12px;");

    auto *paginationLayout = new QHBoxLayout;
    paginationLayout->addWidget(m_prevBtn);
    paginationLayout->addWidget(m_pageLabel);
    paginationLayout->addWidget(m_nextBtn);
    paginationLayout->addStretch();
    paginationLayout->addWidget(m_showAllCheck);
    paginationLayout->addWidget(refreshBtn);
    paginationLayout->addWidget(m_sendBtn);

    auto *mainLayout = new QVBoxLayout(this);
    mainLayout->addWidget(splitter, 1);
    mainLayout->addLayout(paginationLayout);

    connect(m_prevBtn, &QPushButton::clicked, this, [this]() {
        if (m_page > 0) { --m_page; loadPage(); }
    });
    connect(m_nextBtn, &QPushButton::clicked, this, [this]() {
        if (m_page < m_totalPages - 1) { ++m_page; loadPage(); }
    });
    connect(refreshBtn, &QPushButton::clicked, this, [this]() {
        m_page = 0;
        loadPage();
    });
    connect(m_showAllCheck, &QCheckBox::toggled, this, [this]() {
        m_page = 0;
        loadPage();
    });
    connect(m_table, &QTableWidget::cellClicked, this, [this](int row, int) {
        showScreenshot(row);
    });
    connect(m_table, &QTableWidget::cellDoubleClicked, this, [this](int row, int) {
        if (row >= 0 && row < m_entries.size()) {
            auto *detail = new LogDetailWindow(m_entries[row], this);
            detail->setAttribute(Qt::WA_DeleteOnClose);
            detail->show();
        }
    });
    connect(m_sendBtn, &QPushButton::clicked, this, &FileLogWindow::sendLogToTelegram);

    loadPage();
}

QStringList FileLogWindow::currentLevelFilter() const {
    if (m_showAllCheck->isChecked())
        return {};
    return {"WARNING", "CRITICAL", "FATAL"};
}

void FileLogWindow::loadPage() {
    const QStringList levels = currentLevelFilter();
    const int total = GeneralLogDAO::getTotalCount(levels);
    m_totalPages = qMax(1, (total + m_pageSize - 1) / m_pageSize);
    m_page = qBound(0, m_page, m_totalPages - 1);

    m_entries = GeneralLogDAO::getLogs(m_page, m_pageSize, levels);

    m_table->setRowCount(static_cast<int>(m_entries.size()));
    for (int i = 0; i < m_entries.size(); ++i) {
        const auto &e = m_entries[i];
        m_table->setItem(i, COL_ID,      new QTableWidgetItem(QString::number(e.id)));
        m_table->setItem(i, COL_TIME,    new QTableWidgetItem(
            e.timestamp.toLocalTime().toString("dd.MM.yy HH:mm:ss")));
        m_table->setItem(i, COL_LEVEL,   new QTableWidgetItem(e.level));
        m_table->setItem(i, COL_SOURCE,  new QTableWidgetItem(e.source));
        m_table->setItem(i, COL_MESSAGE, new QTableWidgetItem(e.message));
    }

    updatePagination();
}

void FileLogWindow::showScreenshot(int row) {
    if (row < 0 || row >= m_entries.size()) return;
    const QByteArray &data = m_entries[row].screenshot;
    if (data.isEmpty()) {
        m_screenshotLabel->setText("Нет скриншота");
        return;
    }

    QPixmap pixmap;
    pixmap.loadFromData(data);
    if (pixmap.isNull()) {
        m_screenshotLabel->setText("Ошибка загрузки");
        return;
    }

    m_screenshotLabel->setPixmap(pixmap.scaled(
        m_screenshotLabel->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation));
}

void FileLogWindow::updatePagination() {
    m_pageLabel->setText(QString("Страница %1 из %2").arg(m_page + 1).arg(m_totalPages));
    m_prevBtn->setEnabled(m_page > 0);
    m_nextBtn->setEnabled(m_page < m_totalPages - 1);
}

void FileLogWindow::sendLogToTelegram() {
    qDebug() << "[sendLogToTelegram] step 1: checking log file";
    const QString logPath = QCoreApplication::applicationDirPath() + "/application.log";
    if (!QFile::exists(logPath)) {
        QMessageBox::warning(this, "Ошибка", "Файл application.log не найден");
        return;
    }

    m_sendBtn->setEnabled(false);
    m_sendBtn->setText("Подготовка...");

    qDebug() << "[sendLogToTelegram] step 2: creating tmp dir";
    // Собираем временную папку для архива
    const QString tmpDir = QDir::tempPath() + "/arc_logs_export";
    QDir().mkpath(tmpDir);

    // 1. Копируем application.log
    QFile::remove(tmpDir + "/application.log");
    QFile::copy(logPath, tmpDir + "/application.log");

    qDebug() << "[sendLogToTelegram] step 3: exporting errors";
    // 2. Экспортируем events с ошибками в errors.txt
    const QList<EventInfo> errors = EventDAO::getAllEvents(EventStatus::Error);
    if (!errors.isEmpty()) {
        QFile errFile(tmpDir + "/errors.txt");
        if (errFile.open(QIODevice::WriteOnly | QIODevice::Text)) {
            QTextStream out(&errFile);
            for (const EventInfo &e : errors) {
                out << "--- Event #" << e.id << " ---\n"
                    << "Type: " << eventTypeToString(e.type) << "\n"
                    << "Bank: " << e.bankName << "\n"
                    << "Device: " << e.deviceId << "\n"
                    << "Amount: " << e.amount << "\n"
                    << "Phone: " << e.phone << "\n"
                    << "Comment: " << e.comment << "\n"
                    << "Time: " << e.timestamp.toString(Qt::ISODate) << "\n"
                    << "JSON: " << e.json << "\n\n";
            }
            errFile.close();
        }
    }

    qDebug() << "[sendLogToTelegram] step 4: exporting event screenshots";
    // 3. Экспортируем скриншоты ошибок из events
    QDir().mkpath(tmpDir + "/screenshots");
    int screenshotCount = 0;
    for (const EventInfo &e : errors) {
        const QByteArray screenshot = EventDAO::getScreenshot(e.id);
        if (screenshot.isEmpty()) continue;
        const QString fileName = QString("screenshots/%1_%2_%3.png")
            .arg(e.id)
            .arg(eventTypeToString(e.type))
            .arg(e.timestamp.toString("yyyyMMdd_HHmmss"));
        QFile imgFile(tmpDir + "/" + fileName);
        if (imgFile.open(QIODevice::WriteOnly)) {
            imgFile.write(screenshot);
            imgFile.close();
            ++screenshotCount;
        }
    }

    qDebug() << "[sendLogToTelegram] step 5: exporting log screenshots";
    // 3.5. Экспортируем скриншоты из general_logs (ошибки скриптов)
    const QList<GeneralLogEntry> logErrors = GeneralLogDAO::getLogs(0, 100, {"WARNING", "CRITICAL", "FATAL"});
    for (const GeneralLogEntry &gl : logErrors) {
        if (gl.screenshot.isEmpty()) continue;
        const QString fileName = QString("screenshots/log_%1_%2.png")
            .arg(gl.id)
            .arg(gl.timestamp.toString("yyyyMMdd_HHmmss"));
        QFile imgFile(tmpDir + "/" + fileName);
        if (imgFile.open(QIODevice::WriteOnly)) {
            imgFile.write(gl.screenshot);
            imgFile.close();
            ++screenshotCount;
        }
    }

    qDebug() << "[sendLogToTelegram] step 6: creating archive with powershell";
    // 4. Создаём архив
#ifdef Q_OS_WIN
    const QString archivePath = QDir::tempPath() + "/arc_logs.zip";
    QFile::remove(archivePath);
    QProcess archiver;
    archiver.setWorkingDirectory(tmpDir);
    archiver.start("powershell", QStringList()
        << "-NoProfile" << "-Command"
        << QString("Compress-Archive -Path '%1/*' -DestinationPath '%2' -Force").arg(tmpDir, archivePath));
    if (!archiver.waitForFinished(30000)) {
        qWarning() << "[sendLogToTelegram] powershell archiver timeout/error:" << archiver.errorString();
    }
    qDebug() << "[sendLogToTelegram] step 6.1: archiver exit code:" << archiver.exitCode()
             << "stdout:" << archiver.readAllStandardOutput()
             << "stderr:" << archiver.readAllStandardError();
#else
    const QString archivePath = QDir::tempPath() + "/arc_logs.zip";
    QFile::remove(archivePath);
    QProcess archiver;
    archiver.setWorkingDirectory(tmpDir);
    archiver.start("zip", QStringList() << "-r" << archivePath << ".");
    archiver.waitForFinished(30000);
#endif

    // Чистим временную папку
    QDir(tmpDir).removeRecursively();

    qDebug() << "[sendLogToTelegram] step 7: archive exists:" << QFile::exists(archivePath)
             << "path:" << archivePath;

    if (!QFile::exists(archivePath)) {
        QMessageBox::warning(this, "Ошибка", "Не удалось создать архив");
        m_sendBtn->setEnabled(true);
        m_sendBtn->setText("Отправить");
        return;
    }

    m_sendBtn->setText("Отправка...");

    QFile *zipFile = new QFile(archivePath);
    if (!zipFile->open(QIODevice::ReadOnly)) {
        QMessageBox::warning(this, "Ошибка", "Не удалось открыть архив");
        delete zipFile;
        m_sendBtn->setEnabled(true);
        m_sendBtn->setText("Отправить");
        return;
    }

    // Проверяем поддержку SSL
    if (!QSslSocket::supportsSsl()) {
        qWarning() << "[sendLogToTelegram] SSL not supported! Build:" << QSslSocket::sslLibraryBuildVersionString()
                   << "Runtime:" << QSslSocket::sslLibraryVersionString();
        QMessageBox::warning(this, "Ошибка", "SSL не поддерживается.\nНевозможно отправить логи через HTTPS.");
        delete zipFile;
        m_sendBtn->setEnabled(true);
        m_sendBtn->setText("Отправить");
        return;
    }

    qDebug() << "[sendLogToTelegram] SSL OK, sending...";

    // Telegram Bot API
    const QString botToken = "8256716069:AAFgZRB_0Y6KTpqFQmCxIlZiWdY5m2dR2D8";
    const QString chatId = "-5177086220";
    const QString desktopId = SettingsDAO::get("desktop_id");
    const QString caption = "Logs from desktop: " + desktopId
        + "\nErrors: " + QString::number(errors.size())
        + "\nScreenshots: " + QString::number(screenshotCount);

    const QUrl url("https://api.telegram.org/bot" + botToken + "/sendDocument");

    auto *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);

    QHttpPart chatPart;
    chatPart.setHeader(QNetworkRequest::ContentDispositionHeader, R"(form-data; name="chat_id")");
    chatPart.setBody(chatId.toUtf8());
    multiPart->append(chatPart);

    QHttpPart captionPart;
    captionPart.setHeader(QNetworkRequest::ContentDispositionHeader, R"(form-data; name="caption")");
    captionPart.setBody(caption.toUtf8());
    multiPart->append(captionPart);

    QHttpPart filePart;
    filePart.setHeader(QNetworkRequest::ContentTypeHeader, "application/zip");
    filePart.setHeader(QNetworkRequest::ContentDispositionHeader,
        R"(form-data; name="document"; filename="arc_logs.zip")");
    filePart.setBodyDevice(zipFile);
    zipFile->setParent(multiPart);
    multiPart->append(filePart);

    qDebug() << "[sendLogToTelegram] step 8: creating network request";
    auto *manager = new QNetworkAccessManager(this);

    // Принудительно используем Schannel (нативный Windows TLS) вместо OpenSSL
    QSslConfiguration sslConfig = QSslConfiguration::defaultConfiguration();
    sslConfig.setBackendConfigurationOption("SslProtocol", "TlsV1_2OrLater");
    QNetworkRequest req(url);
    req.setSslConfiguration(sslConfig);

    qDebug() << "[sendLogToTelegram] step 9: posting to telegram..."
             << "SSL backend:" << QSslSocket::activeBackend();
    QNetworkReply *reply = manager->post(req, multiPart);
    qDebug() << "[sendLogToTelegram] step 10: post sent, waiting for reply";
    multiPart->setParent(reply);

    connect(reply, &QNetworkReply::finished, this, [this, reply, manager, archivePath]() {
        reply->deleteLater();
        manager->deleteLater();
        QFile::remove(archivePath);

        m_sendBtn->setEnabled(true);
        m_sendBtn->setText("Отправить");

        if (reply->error() != QNetworkReply::NoError) {
            QMessageBox::warning(this, "Ошибка", "Не удалось отправить: " + reply->errorString());
            return;
        }

        QMessageBox::information(this, "Готово", "Логи отправлены в Telegram");
    });
}