#include <windows.h>
#include <QApplication>
#include <QDebug>
#include <QMessageBox>
#include <QProcess>
#include <QProgressDialog>
#include <QTextCodec>
#include "UpdateLogic.h"
#include "../Common/ConfigHelper.h"
#include "../Common/PolicyHelper.h"
#include "../Common/LocalStateHelper.h"

int main(int argc, char* argv[])
{
    SetConsoleOutputCP(65001);
    QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
    QApplication app(argc, argv);
    QApplication::setApplicationName("Marsco Launcher");

    QProgressDialog progress("正在检查软件更新...", QString(), 0, 0);
    progress.setWindowTitle("Marsco 软件启动器");
    progress.setCancelButton(nullptr);
    progress.setWindowModality(Qt::ApplicationModal);
    progress.setMinimumDuration(0);
    progress.setAutoClose(false);
    progress.show();
    QApplication::processEvents();

    UpdateLogic logic;
    logic.checkUpdate();

    const bool needUpdate = logic.getNeedUpdate();
    const bool networkOk = logic.isNetworkOk();
    const QString latestVer = logic.getLatestVersion();
    const QJsonObject response = logic.getCheckResult();
    const int targetVersionId = response.value("version_id").toInt();
    const QString appId = logic.getAppId();
    const QString channel = logic.getChannel();

    ConfigHelper& config = ConfigHelper::instance();
    const QString launchToken = config.getValue("App", "launch_token");
    const QString currentVersion = config.getValue("App", "current_version");
    const QString appDir = QApplication::applicationDirPath();
    const QString mainAppPath = appDir + "/MainApp.exe";
    const QString updaterPath = appDir + "/Updater.exe";
    const QStringList mainArgs{QString("--launcher-token=%1").arg(launchToken)};

    progress.setLabelText("正在验证本地运行策略...");
    QApplication::processEvents();

    PolicyHelper policy(appDir);
    if (!policy.loadPolicy("config/version_policy.dat") || !policy.isValid())
    {
        progress.close();
        QMessageBox::critical(nullptr, "无法启动", QString("本地版本策略无效：%1").arg(policy.errorString()));
        return -1;
    }
    if (policy.isExpired())
    {
        progress.close();
        QMessageBox::critical(nullptr, "无法启动", "本地版本策略已过期，请连接网络或联系管理员。");
        return -1;
    }
    if ((!policy.allowRun() || !policy.isVersionAllowed(currentVersion)) && !(networkOk && needUpdate))
    {
        progress.close();
        QMessageBox::critical(nullptr, "当前版本不可运行",
            policy.message().isEmpty() ? QString("当前版本 %1 已被管理员停用。").arg(currentVersion)
                                       : policy.message());
        return -1;
    }

    LocalStateHelper state(appDir);
    if (!state.loadState())
    {
        progress.close();
        QMessageBox::critical(nullptr, "无法启动", QString("无法读取本地状态：%1").arg(state.errorString()));
        return -1;
    }
    if (state.isPolicySeqRolledBack(policy.policySeq()))
    {
        progress.close();
        QMessageBox::critical(nullptr, "安全检查失败", "检测到版本策略序列回退，已阻止启动。");
        return -1;
    }
    if (state.isSystemTimeRewound())
    {
        progress.close();
        QMessageBox::critical(nullptr, "安全检查失败", "检测到系统时间可能被回拨，已阻止启动。");
        return -1;
    }

    if (networkOk && needUpdate)
    {
        progress.close();
        const bool rollbackOperation = response.value("action").toString() == "rollback_allowed";
        const QString dialogTitle = rollbackOperation ? "版本回退"
            : (policy.forceUpdate() ? "必须更新" : "发现新版本");
        const QString prompt = policy.message().isEmpty()
            ? QString(rollbackOperation ? "管理员提供了版本 %1 作为回退目标，是否现在降级？"
                                        : "发现新版本 %1，是否现在更新？").arg(latestVer)
            : policy.message() + QString("\n目标版本：%1").arg(latestVer);
        bool accepted = true;
        if (policy.forceUpdate()) {
            QMessageBox::information(nullptr, dialogTitle, prompt);
        } else {
            accepted = QMessageBox::question(nullptr, dialogTitle, prompt,
                QMessageBox::Yes | QMessageBox::No, QMessageBox::No) == QMessageBox::Yes;
        }
        if (!accepted) {
            if (!QProcess::startDetached(mainAppPath, mainArgs)) {
                QMessageBox::critical(nullptr, "启动失败", QString("无法启动主程序：%1").arg(mainAppPath));
                return -1;
            }
            return 0;
        }
        const QStringList updaterArgs{appId, channel, latestVer, QString::number(targetVersionId)};
        if (!QProcess::startDetached(updaterPath, updaterArgs))
        {
            QMessageBox::critical(nullptr, "更新器启动失败", QString("无法启动更新器：%1").arg(updaterPath));
            return -1;
        }
        return 0;
    }

    if (!networkOk && !policy.isOfflineAllowed())
    {
        progress.close();
        QMessageBox::critical(nullptr, "网络不可用", "无法连接更新服务器，且当前策略不允许离线启动。");
        return -1;
    }

    progress.setLabelText(networkOk ? "当前已是最新版本，正在启动..." : "当前处于离线模式，正在启动...");
    QApplication::processEvents();
    if (!QProcess::startDetached(mainAppPath, mainArgs))
    {
        progress.close();
        QMessageBox::critical(nullptr, "启动失败", QString("无法启动主程序：%1").arg(mainAppPath));
        return -1;
    }
    progress.close();
    return 0;
}