#pragma once

#include <vector>

#include <QObject>
#include <QString>

class WorkSpace;

class Timestep : public QObject {
	Q_OBJECT
public:
    enum class PlayStatus : uint8_t {
        PS_Started,
        PS_Stoped,
        PS_Suspended,
    };

public:
	explicit Timestep(const std::vector<double>& steps, const QString& path, WorkSpace* parent = nullptr) noexcept;
	~Timestep() override = default;

	static Timestep* Load(const QString& path, WorkSpace* workSpace = nullptr);

	const std::vector<double>& GetSteps() const {
		return steps_;
	}
	const QString& GetPath() const {
		return path_;
	}

	void GetRange(double& minTime, double& maxTime, double& step);
	void Update(double dt);
	double GetCurrent() const {
		return current_;
	}

	bool IsPause();
	bool IsStoped();
	void Start();
	void Resume();
	void Pause();
	void Stop();

	void Up();
    void Down();

	WorkSpace* GetWorkSpace() const {
		return workSpace_;
	}

Q_SIGNALS:
	void StatusChanged(int);
	void StepChanged(double);
	void TimeChanged(double);
	

private:
    std::vector<double> steps_;
    QString path_;
    double current_{ 0.0 };
    double maxTime_{ 0.0 };
    // 播放速度（倍率），与 UI 显示一致，比如 0.5x、1x、2x
    double currentStep_{ 1.0 };
    // 有限倍率列表，防止无限放大/缩小导致无法恢复
    std::vector<double> speedLevels_{ 0.25, 0.5, 1.0, 2.0, 4.0, 8.0 };
    int speedIndex_{ 2 }; // 默认指向 1.0x

	
    PlayStatus playStatus_{ PlayStatus::PS_Stoped };
    WorkSpace* workSpace_{ nullptr };
};