using UnityEngine;

namespace ZFramework
{
    /// <summary>
    /// 用户基类
    /// </summary>
    [RequireComponent(typeof(CharacterController))]
    public class PlayerBase : MonoBehaviour
    {
        /// <summary>
        /// 角色控制器
        /// </summary>
        CharacterController characterController;

        /// <summary>
        /// 方向
        /// </summary>
        Vector3 direction;

        /// <summary>
        /// 移动速度
        /// </summary>
        [SerializeField] protected float moveSpeed = 5;

        /// <summary>
        /// 跳跃高度
        /// </summary>
        protected float jumpPower = 5;

        /// <summary>
        /// 重力
        /// </summary>
        [SerializeField] protected float gravity = 9.8f;

        /// <summary>
        /// 旋转速度
        /// </summary>
        protected float mouseSpeed = 5;

        /// <summary>
        /// 最小视角角度
        /// </summary>
        protected float minmouseY = -45;

        /// <summary>
        /// 最大视角角度
        /// </summary>
        protected float maxmouseY = 45;

        /// <summary>
        /// 是否能移动
        /// </summary>
        [SerializeField] protected bool isCanMove = true;

        /// <summary>
        /// 是否能旋转
        /// </summary>
        [SerializeField] protected bool isCanRotate = true;

        /// <summary>
        /// 是否能跳跃
        /// </summary>
        [SerializeField] protected bool isCanJump = true;

        /// <summary>
        /// 是否暂停玩家操控
        /// </summary>
        private bool isPause;

        float RotationY = 0f;
        float RotationX = 0f;


        /// <summary>
        /// 摄像机（用户视角）
        /// </summary>
        private Transform mainCamera;

        float _horizontal;
        float _vertical;

        private void Awake()
        {
            OnAwake();
        }

        private void FixedUpdate()
        {
            if (isPause) return;

            _horizontal = Input.GetAxis("Horizontal");
            _vertical = Input.GetAxis("Vertical");
            OnFixedUpdate();
        }

        public virtual void OnAwake()
        {
            isPause = false;
            characterController = GetComponent<CharacterController>();
            mainCamera = transform.Find("MainCamera");
            if (mainCamera == null) Debug.LogError("transform find not have mainCamera! please check!");
        }

        public virtual void OnFixedUpdate()
        {
            PlayerMove();
            CameraRotate();
        }

        /// <summary>
        /// 暂停玩家控制（此处的暂停包括玩家的所有控制）
        /// </summary>
        public virtual void Pause()
        {
            isPause = true;
        }

        /// <summary>
        /// 恢复玩家控制（此处的暂停包括玩家的所有控制）
        /// </summary>
        public virtual void Resume()
        {
            isPause = false;
        }

        /// <summary>
        /// 用户移动控制
        /// </summary>
        void PlayerMove()
        {
            if (isCanMove)
            {
                if (characterController.isGrounded)
                {
                    direction = new Vector3(_horizontal, 0, _vertical);
                    if (Input.GetKeyDown(KeyCode.Space) && isCanJump)
                        direction.y = jumpPower;
                }

                direction.y -= gravity * Time.deltaTime;
                characterController.Move(
                    characterController.transform.TransformDirection(direction * Time.deltaTime * moveSpeed));
            }
        }

        /// <summary>
        /// 相机旋转视角控制
        /// </summary>
        void CameraRotate()
        {
            if (isCanRotate)
            {
                if (Input.GetMouseButton(1))
                {
                    RotationX += mainCamera.transform.localEulerAngles.y + Input.GetAxis("Mouse X") * mouseSpeed;

                    RotationY -= Input.GetAxis("Mouse Y") * mouseSpeed;
                    RotationY = Mathf.Clamp(RotationY, minmouseY, maxmouseY);

                    this.transform.eulerAngles = new Vector3(0, RotationX, 0);

                    mainCamera.transform.eulerAngles = new Vector3(RotationY, RotationX, 0);
                }
            }
        }

    }
}