using System.Collections;
using UnityEngine;
using UnityEngine.InputSystem;

/* * WalkDogs 场景挂载在2D Player上
 * SoundGameController.cs
 * Author: 2023-10-12
    * Description: 音乐游戏控制器
    * 1. 读取音轨数据
    * 2. 创建音符
    * 3. 检测音符点击
 */
public class SoundGameController : MonoBehaviour
{
    SoundTrackManager soundTrackManager = new();
    GameObject notePrefabSwipe, notePrefabTap;

    float gameStartTime;
    float GameEndTime;
    // 游戏得分统计
    int score = 0;
    int combo = 0;
    int PerfectCount = 0;
    int GoodCount = 0;
    int PoorCount = 0;
    int MissCount = 0;
    int totalCount = 0;

    // TapOrSwipe 触控检测
    Vector2 pressDownPosition = new Vector2(0, 0);
    Vector2 pressUpPosition = new Vector2(0, 0);
    float pressDownTime = 0f;
    float pressUpTime = 0f;
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        TextAsset soundTrackJson = Resources.Load<TextAsset>("WalkDogs/SoundTrack/track_1");
        if (soundTrackJson != null)
        {
            string soundTrackString = soundTrackJson.text;
            soundTrackManager.ImportFromJson(soundTrackString);
        }
        notePrefabSwipe = Resources.Load<GameObject>("WalkDogs/Note/NoteSwipe");
        notePrefabTap = Resources.Load<GameObject>("WalkDogs/Note/NoteTap");

        StartCoroutine(PlaySoundGame());
    }

    // Update is called once per frame
    void Update()
    {

    }

    IEnumerator PlaySoundGame()
    {
        // 加载音乐
        AudioClip audioClip = Resources.Load<AudioClip>(soundTrackManager.resource);
        AudioSource audioSource = gameObject.AddComponent<AudioSource>();
        audioSource.clip = audioClip;
        audioSource.Play();

        gameStartTime = Time.time;
        GameEndTime = gameStartTime + soundTrackManager.length;

        while (Time.time < GameEndTime)
        {
            // 用于提前n秒创建音符
            foreach (var note in soundTrackManager.soundAction)
            {
                if (!note.isActive && Time.time >= (note.time - GameData.noteStartLeadTime))
                {
                    note.isActive = true;
                    CreateNote(note.time, note.action, soundTrackManager.soundAction.IndexOf(note).ToString());
                    continue;
                }
            }

            // 检测音符是否超时未被点击
            foreach (var note in soundTrackManager.soundAction)
            {
                float TapTimeDeadline = note.time + gameStartTime + 0.35f; // 计算点击事件超时
                if (note.isActive && !note.isTapped && Time.time > TapTimeDeadline)
                {
                    note.isTapped = true;
                    MissCount++;
                    Debug.Log("Miss!" + Time.time + " Tap time deadline: " + TapTimeDeadline + " total miss:" + MissCount);
                    Debug.Log("index of note:" + soundTrackManager.soundAction.IndexOf(note));
                    break;
                }
            }

            // 检测游戏是否结束并统计分数
            totalCount = PerfectCount + GoodCount + PoorCount + MissCount;
            if (totalCount == soundTrackManager.soundAction.Count)
            {
                GameEndTime = Time.time;
                Debug.Log("Game Over!");
                Debug.Log($"Perfect: {PerfectCount}, Good: {GoodCount}, Poor: {PoorCount}, Miss: {MissCount}");
                Debug.Log($"Total Count: {totalCount}");
                Debug.Log($"Score: {score}");
                Debug.Log($"Combo: {combo}");
                // 结束游戏
                break;      // 跳出 while 循环
            }
            yield return new WaitForSeconds(0.01f);
        }
        yield return null;
    }

    private void CreateNote(float hitTime, string action, string noteName)
    {
        GameObject note;
        if (action == "tap")
        {
            note = Instantiate(notePrefabTap);
        }
        else
        {
            note = Instantiate(notePrefabSwipe);
        }
        note.gameObject.name = noteName;
        NoteController noteController = note.GetComponent<NoteController>();
        noteController.speed = soundTrackManager.speed;
        noteController.hitTime = hitTime;
        noteController.action = action;
    }

    // 触控检测，检测通过按下和和抬起的触控点位置计算点击或者上下左右滑动
    public void TapOrSwipe(InputAction.CallbackContext context)
    {

        if (context.phase == InputActionPhase.Started)
        {
            pressDownPosition = Pointer.current.position.ReadValue();
            pressDownTime = Time.time;
            return;
        }
        if (context.phase == InputActionPhase.Canceled)
        {
            pressUpPosition = Pointer.current.position.ReadValue();
            pressUpTime = Time.time;
            float deltaX = pressUpPosition.x - pressDownPosition.x;
            float deltaY = pressUpPosition.y - pressDownPosition.y;
            float distance = Mathf.Sqrt(deltaX * deltaX + deltaY * deltaY);
            // Debug.Log($"deltaX: {deltaX}, deltaY: {deltaY}, distance: {distance}");
            float timeDelta = pressUpTime - pressDownTime;
            string action;
            if (timeDelta > 0.2f)
            {
                return;
            }
            else
            {
                if (distance < 20f)
                {
                    action = "tap";
                }
                else
                {
                    if (Mathf.Abs(deltaX) > Mathf.Abs(deltaY))
                    {
                        if (deltaX > 0)
                        {
                            action = "right";
                        }
                        else
                        {
                            action = "left";
                        }
                    }
                    else
                    {
                        if (deltaY > 0)
                        {
                            action = "up";
                        }
                        else
                        {
                            action = "down";
                        }
                    }
                }
            }
            TouchResponse touchResponse = new TouchResponse(action, pressUpTime);
            // Debug.Log($"TouchResponse: {touchResponse.action}, {touchResponse.time}");
            // 检测点击的音符
            ScoreCheck(touchResponse);
        }
        return;
    }

    private void ScoreCheck(TouchResponse touchResponse)
    {
        if (touchResponse != null)
        {
            foreach (var note in soundTrackManager.soundAction)
            {
                float TapTimeDelta = Mathf.Abs(touchResponse.time - (note.time + gameStartTime));       // 计算点击时间和音符时间的差值
                if (note.isActive && !note.isTapped && TapTimeDelta < 0.3f)
                {
                    note.isTapped = true;
                    if (touchResponse.action == note.action)
                    {
                        if (TapTimeDelta < 0.1f)
                        {
                            score += 100;
                            combo++;
                            PerfectCount++;
                            Debug.Log("Perfect!" + Time.time + " total perfect:" + PerfectCount);
                            string noteName = soundTrackManager.soundAction.IndexOf(note).ToString();
                            DestroyNote(noteName);
                        }
                        else if (TapTimeDelta < 0.2f)
                        {
                            score += 30;
                            combo = 0;
                            GoodCount++;
                            Debug.Log("Good!" + Time.time + " total good:" + GoodCount);
                            string noteName = soundTrackManager.soundAction.IndexOf(note).ToString();
                            DestroyNote(noteName);
                        }
                        else
                        {
                            score += 10;
                            combo = 0;
                            PoorCount++;
                            Debug.Log("Poor!" + Time.time + " total poor:" + PoorCount);
                        }
                    }
                    else
                    {
                        combo = 0;
                        MissCount++;
                        Debug.Log("Wrong!" + Time.time + " total miss:" + MissCount);
                    }
                    Debug.Log("index of note:" + soundTrackManager.soundAction.IndexOf(note));
                    break;
                }
            }
        }
    }

    private void DestroyNote(string noteName)
    {
        GameObject note = GameObject.Find(noteName);
        if (note != null)
        {
            Destroy(note);
        }
        else
        {
            Debug.Log("Note not found: " + noteName);
        }
    }
}

public class TouchResponse
{
    public string action = "";  // 触控动作 up, down, left, right, tap, none(表示无效)
    public float time;

    public TouchResponse(string action, float time)
    {
        this.action = action;
        this.time = time;
    }
}