using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerMovement_Joystick : MonoBehaviour
{
    public FixedJoystick joystick;  // 引用 Fixed Joystick
    public Transform cameraTransform;  // 引用主摄像机的 Transform
    public float moveSpeed = 5f;

    public CharacterControl characterControl;
    private CharacterAin Characterain;

    public Camera mainCamera;

    private Rigidbody rb;

    // 定义相机 FOV 相关变量
    public float normalFOV = 60f;  // 正常行走时的FOV
    public float sprintFOV = 120f;  // 奔跑时的FOV
    public float fovChangeSpeed = 2f;  // FOV改变的速度

    // 触摸ID变量，用于区分左右区域触摸
    private int leftFingerId = -1;  // 左侧区域触摸ID
    private int rightFingerId = -1; // 右侧区域触摸ID

    private Vector2 rightTouchStartPos; // 记录右手触摸开始位置

    private bool IsMoving = false;
    private float MoveTime = 0f; // 跑步切换的时间
    public float walkTime;       // 走路的时间
    public float runTime;        // 跑的时间
    private float targetFOV;     // 跑步时平滑切换FOV

    private void Start()
    {
        characterControl = GetComponent<CharacterControl>();
        Characterain = GetComponent<CharacterAin>();
        rb = GetComponent<Rigidbody>();
    }

    void Update()
    {
        foreach (Touch touch in Input.touches)
        {
            // 触摸开始时分配触摸区域
            if (touch.phase == TouchPhase.Began)
            {
                if (touch.position.x < Screen.width / 2 && leftFingerId == -1)
                {
                    leftFingerId = touch.fingerId; // 左侧区域用于控制虚拟摇杆
                }
                else if (touch.position.x >= Screen.width / 2 && rightFingerId == -1)
                {
                    rightFingerId = touch.fingerId; // 右侧区域用于滑动视角
                    rightTouchStartPos = touch.position; // 记录右手触摸起点
                }
            }
            else if (touch.phase == TouchPhase.Moved || touch.phase == TouchPhase.Stationary)
            {
                if (touch.fingerId == leftFingerId)
                {
                    HandleJoystickControl(); // 左手触摸：处理角色移动
                }
                else if (touch.fingerId == rightFingerId)
                {
                    HandleViewSwipe(touch); // 右手触摸：滑动视角
                }
            }
            else if (touch.phase == TouchPhase.Ended || touch.phase == TouchPhase.Canceled)
            {
                if (touch.fingerId == leftFingerId)
                {
                    leftFingerId = -1; // 触摸结束时重置左手ID
                }
                else if (touch.fingerId == rightFingerId)
                {
                    rightFingerId = -1; // 触摸结束时重置右手ID
                }
            }
        }
    }

    void HandleJoystickControl()
    {
        // 获取摇杆输入
        float horizontal = joystick.Horizontal;
        float vertical = joystick.Vertical;

        // 转换为三维方向向量 ( 保持在水平面 )
        Vector3 inputDirection = new Vector3(horizontal, 0f, vertical);

        // 获取移动方向相对于摄像机的世界方向
        Vector3 cameraForward = cameraTransform.forward; // 摄像机的前向方向
        Vector3 cameraRight = cameraTransform.right;     // 摄像机的右方向

        // 只需要水平的移动方向，去掉摄像头的y轴分量
        cameraForward.y = 0;
        cameraRight.y = 0;

        cameraForward.Normalize();
        cameraRight.Normalize();

        // 计算最终的移动方向 ( 相对于摄像机的前后左右 )
        Vector3 moveDirection = (cameraRight * horizontal + cameraForward * vertical).normalized;

        if (Mathf.Abs(vertical) > 0.01f || Mathf.Abs(horizontal) > 0.01f)
        {
            if (MoveTime < (walkTime + runTime + 0.1f))
            {
                MoveTime += Time.deltaTime;
            }
        }

        // 应用移动
       
            Vector3 newPosition = rb.position + moveDirection * moveSpeed * Time.fixedDeltaTime;
            rb.MovePosition(newPosition);
            MoveState();

            // 使角色面朝移动方向
            Quaternion toRotation = Quaternion.LookRotation(moveDirection, Vector3.up);
            transform.rotation = Quaternion.RotateTowards(transform.rotation, toRotation, 720 * Time.deltaTime);
        
    }

    void HandleViewSwipe(Touch touch)
    {
        // 滑动视角逻辑
        Vector2 swipeDelta = touch.position - rightTouchStartPos;
        float horizontalSwipe = swipeDelta.x * 0.1f; // 可调整灵敏度
        float verticalSwipe = -swipeDelta.y * 0.1f;

        cameraTransform.Rotate(0, horizontalSwipe, 0, Space.World);
        cameraTransform.Rotate(verticalSwipe, 0, 0, Space.Self);

        // 更新右手触摸起点
        rightTouchStartPos = touch.position;
    }

    public void MoveState()
    {
        if (MoveTime < walkTime)  // 慢走
        {
            Characterain.SetPlayerState(CharacterState.SlowWalk);
            targetFOV = normalFOV; // 设置目标FOV为正常值
        }
        else if (MoveTime < (walkTime + runTime)) // 普通行走 
        {
            Characterain.SetPlayerState(CharacterState.walk);
            targetFOV = normalFOV + 30f; // 设置目标FOV为增加值
        }
        else  // 奔跑
        {
            Characterain.SetPlayerState(CharacterState.run);
            targetFOV = sprintFOV; // 设置目标FOV为奔跑值
        }

        // 使用插值平滑调整相机的FOV
        mainCamera.fieldOfView = Mathf.Lerp(mainCamera.fieldOfView, targetFOV, fovChangeSpeed * Time.deltaTime);
    }
}