using UnityEngine;

/// <summary>
/// 全局单例管理器：持有当前实验的类型、模式、固定方式与加权分数。
/// 挂在场景第一个 GameObject 上，设置 DontDestroyOnLoad。
/// </summary>
public class GameManager : MonoBehaviour
{
    public static GameManager Instance { get; private set; }

    [Header("当前实验设置（运行时赋值）")]
    public ExperimentType CurrentExperimentType = ExperimentType.FractureFixation;
    public ExperimentMode CurrentMode = ExperimentMode.Learn;
    public FixationMethod CurrentFixationMethod = FixationMethod.LimbFixation;

    [Header("加权评分")]
    public float TotalWeightedScore;       // 实际得分（加权累加）
    public float MaxWeightedScore = 100f;  // 总分

    [Header("考核记录")]
    public float[] StepScores;        // 每步实际得分（含权重）
    public float[] StepMaxScores;     // 每步满分（权重值）
    public string[] StepFeedback;     // 每题错误反馈文本
    public bool[] StepCorrect;        // 每题是否有任何得分

    private void Awake()
    {
        if (Instance != null && Instance != this)
        {
            Destroy(gameObject);
            return;
        }
        Instance = this;
        DontDestroyOnLoad(gameObject);
    }

    /// <summary>初始化考核记录数组</summary>
    public void InitExamRecord(int stepCount)
    {
        StepScores = new float[stepCount];
        StepMaxScores = new float[stepCount];
        StepFeedback = new string[stepCount];
        StepCorrect = new bool[stepCount];
        TotalWeightedScore = 0f;
    }

    /// <summary>
    /// 记录一个考核步骤的结果。
    /// proportion 为 0~1，表示得分比例（SequenceClick 类型部分正确时用到）。
    /// </summary>
    public void RecordExamResult(int stepIndex, float maxScore, float proportion, string feedback)
    {
        if (StepScores == null || stepIndex >= StepScores.Length) return;

        StepMaxScores[stepIndex] = maxScore;
        float earned = maxScore * Mathf.Clamp01(proportion);
        StepScores[stepIndex] = earned;
        StepFeedback[stepIndex] = feedback;
        StepCorrect[stepIndex] = proportion > 0f;
        TotalWeightedScore += earned;
    }

    /// <summary>按百分比返回考核分数</summary>
    public float GetExamPercentage()
    {
        if (MaxWeightedScore <= 0f) return 0f;
        return TotalWeightedScore / MaxWeightedScore * 100f;
    }

    /// <summary>获取总分（整数）</summary>
    public int GetExamScoreRounded()
    {
        return Mathf.RoundToInt(TotalWeightedScore);
    }
}