// Moonlight 会话（外部进程）
//
// 以 QProcess 参数数组直启 moonlight-qt（不拼 shell 命令）。
// 进程启动、串流就绪和终止是不同事件，调用方据此控制过场和状态机。

#ifndef KIOSK_SHELL_MOONLIGHT_SESSION_H
#define KIOSK_SHELL_MOONLIGHT_SESSION_H

#include <QByteArray>
#include <QProcess>
#include <QString>
#include <functional>

#include "desktop_session.h"

class QTimer;

namespace vdi {

class MoonlightOutputParser {
public:
    void reset();
    void append(const QByteArray& output);
    bool isReady() const;
    bool hasTestDecode() const { return hasTestDecode_; }
    bool hasRenderer() const { return hasRenderer_; }
    bool hasTerminalError() const { return hasTerminalError_; }

private:
    QByteArray buffer_;
    bool hasTestDecode_ = false;
    bool hasRenderer_ = false;
    bool hasTerminalError_ = false;
};

class MoonlightSession : public QObject {
    Q_OBJECT

public:
    struct Options {
        bool vsync = true;
        bool framePacing = true;
        bool performanceOverlay = false;
        bool audioOnHost = true;
        QString videoCodec = QStringLiteral("H.264");
        QString decoder = QStringLiteral("software");
    };

    enum class EventType {
        kStarted,
        kStreamReady,
        kFailed,
        kFinished,
    };

    struct Event {
        EventType type;
        QString message;
    };

    using EventCallback = std::function<void(const Event& event)>;

    explicit MoonlightSession(QObject* parent = nullptr);
    ~MoonlightSession() override;

    void setOptions(const Options& options);
    bool start(const ConnectionTicket& ticket, EventCallback callback);
    void stop();
    bool isRunning() const;
    qint64 processId() const;
    bool activateStreamWindow();

private slots:
    void onProcessStarted();
    void onProcessFinished(int exitCode, QProcess::ExitStatus exitStatus);
    void onProcessError(QProcess::ProcessError error);
    void onProcessOutput();

private:
    void emitEvent(EventType type, const QString& message);
    void emitTerminalEvent(EventType type, const QString& message);
    void scheduleReadyEvent();

    QProcess* process_ = nullptr;
    QTimer* readyTimer_ = nullptr;
    QTimer* killTimer_ = nullptr;
    Options options_;
    EventCallback callback_;
    MoonlightOutputParser outputParser_;
    QString logPath_;
    bool stopRequested_ = false;
    bool terminalEventDelivered_ = false;
    bool readyEventDelivered_ = false;
};

}  // namespace vdi

#endif  // KIOSK_SHELL_MOONLIGHT_SESSION_H