using UnityEngine;
using System.Collections;
using Unity.VisualScripting;
using System.Runtime.InteropServices.WindowsRuntime;
using TMPro;

public class NoteSpawner : MonoBehaviour
{
    public NotePool notePool;           // 引用 NotePool
    public Transform[] spawnPoints;     // 对应轨道的生成点
    public GameObject[] notePrefabs;    // 短音符预制体

    public TextMeshProUGUI globalGameTime;

    // 长音符预制体数组（分别为 start, middle, end）
    public GameObject[] holdNoteStartPrefabs;
    public GameObject[] holdNoteMiddlePrefabs;
    public GameObject[] holdNoteEndPrefabs;

    public float spawnOffset = 0f;    // 生成音符时的时间偏移量
    public float bpm;

    private Beatmap beatmap;
    private float startTime;            // 存储歌曲开始时间
    private bool isSpawning = false;

    private static int holdNoteIdCounter = 0; //  全局唯一长音符 ID 计数器

    public void LoadBeatmap(Beatmap loadedBeatmap)
    {
        if (isSpawning) return;
        isSpawning = true;

        beatmap = loadedBeatmap;
        if (beatmap == null)
        {
            Debug.LogError("加载的谱面为空！");
            return;
        }

        bpm = beatmap.bpm;
        startTime = Time.time;
        Debug.Log($"歌曲开始时间: {startTime}");
        StartCoroutine(SpawnNotes());
    }

    private IEnumerator SpawnNotes()
    {
        if (beatmap == null || beatmap.notes == null)
        {
            Debug.LogError("谱面数据为空！");
            isSpawning = false;
            yield break;
        }

        foreach (NoteData note in beatmap.notes)
        {
            float travelTime = (60f / bpm) * 4;
            float spawnTime = note.time - travelTime;
            float delay = spawnTime - (Time.time - startTime) + spawnOffset;
            Debug.Log($"delay: {delay}");

            if (delay > 0)
                yield return new WaitForSeconds(delay);

            if (note.type == "hold")
            {
                SpawnHoldNote(note);
            }
            else
            {
                SpawnNote(note);
            }
        }

        isSpawning = false;
    }

    // 生成短音符
    public void SpawnNote(NoteData noteData)
    {
        if (noteData.trackIndex < 0 || noteData.trackIndex >= spawnPoints.Length)
        {
            Debug.LogError("轨道索引超出范围！");
            return;
        }

        KeyCode key = KeyBindingManager.GetKeyForColor(noteData.color);
        if (key == KeyCode.None)
        {
            Debug.LogError($"未找到颜色 {noteData.color} 对应的按键！请检查 KeyBindingManager 是否正确初始化。");
            return;
        }

        Debug.Log($"生成短音符：颜色={noteData.color}, 按键={key}, 轨道={noteData.trackIndex}");

        GameObject note = notePool.GetNote(noteData.color);
        if (note == null)
        {
            Debug.LogError("对象池返回了一个空音符！");
            return;
        }

        note.transform.position = spawnPoints[noteData.trackIndex].position;
        note.transform.rotation = Quaternion.identity;

        Note noteScript = note.GetComponent<Note>();
        if (noteScript != null)
        {
            float noteSpawnTime = Time.time;
            noteScript.Setup(key, noteData.trackIndex, CalculateSpeed(), noteData.time, noteData.color);
            Debug.Log($"到达时间：{noteSpawnTime + (60f / bpm) * 4}");
        }
        else
        {
            Debug.LogError("音符预制体缺少 Note 组件！");
        }
    }

    public void SpawnHoldNote(NoteData noteData)
    {
        if (noteData.trackIndex < 0 || noteData.trackIndex >= spawnPoints.Length)
        {
            Debug.LogError("轨道索引超出范围！");
            return;
        }

        KeyCode key = KeyBindingManager.GetKeyForColor(noteData.color);
        if (key == KeyCode.None)
        {
            Debug.LogError($"未找到颜色 {noteData.color} 对应的按键！");
            return;
        }

        if (string.IsNullOrEmpty(noteData.color))
        {
            Debug.LogError("[NoteSpawner] noteData.color 为空，无法生成音符！");
            return;
        }

        Debug.Log($"生成时间：{Time.time}");
        Debug.Log($"生成长音符：颜色={noteData.color}, 按键={key}, 轨道={noteData.trackIndex}");

        float segmentInterval = (60f / bpm) / 4f;
        int segmentCount = Mathf.CeilToInt(noteData.length / segmentInterval);
        Transform spawnPoint = spawnPoints[noteData.trackIndex];
        float scheduledEndTime = noteData.time + noteData.length;

        // 生成唯一 id
        int holdNoteId = Random.Range(100000, 999999);

        // 生成 Start 段
        GameObject startObj = notePool.GetStartNote(noteData.color);
        if (startObj == null)
        {
            Debug.LogError("对象池返回空 hold note start！");
            return;
        }
        startObj.transform.position = spawnPoint.position;
        startObj.transform.rotation = Quaternion.identity;

        HoldNote holdNote = startObj.GetComponent<HoldNote>();
        if (holdNote != null)
        {
            holdNote.Setup(holdNoteId, noteData.trackIndex, CalculateSpeed(), noteData.time, 0f, false, scheduledEndTime, noteData.color, key, "start");
        }
        else
        {
            Debug.LogError("长音符 start 部分缺少 HoldNote 组件！");
            return;
        }

        // 生成 Middle 和 End 段
        for (int i = 1; i < segmentCount; i++)
        {
            float segmentDelay = i * segmentInterval;
            bool isEndSegment = (i == segmentCount - 1);
            string partType = isEndSegment ? "end" : "middle";

            GameObject segObj = notePool.GetHoldNoteSegment(noteData.color);
            if (segObj == null)
            {
                Debug.LogError("对象池返回空 hold note 片段！");
                continue;
            }

            segObj.transform.position = spawnPoint.position;
            segObj.transform.rotation = Quaternion.identity;

            HoldNote holdSeg = segObj.GetComponent<HoldNote>();
            if (holdSeg != null)
            {
                holdSeg.Setup(holdNoteId, noteData.trackIndex, CalculateSpeed(), noteData.time, segmentDelay, isEndSegment, scheduledEndTime, noteData.color, key, partType);
            }
            else
            {
                Debug.LogError("长音符片段缺少 HoldNote 组件！");
            }
        }
    }

    //TEST
    private float CalculateSpeed()
    {
        float noteTravelTime = (60f / bpm) * 4;
        return 10.75f / noteTravelTime;
    }

    private void Update()
    {
        //if (globalGameTime.text=="0.01")
        //{
        //    bgMusicAudioSource.Play();
        //}
        //else return;
    }
}