using System;
using UnityEngine;
using WaveHarmonic.Crest;

namespace NBF
{
    public class Boat : MonoBehaviour
    {
        [Tooltip("移动力应施加于质心的垂直偏移量。")] [SerializeField]
        float _ForceHeightOffset;

        [Tooltip("水船因推力而移动的速度有多快。")] [SerializeField]
        float _ThrustPower = 10f;

        [Tooltip("船舵一转，船身就迅速转向。")] [SerializeField]
        float _SteerPower = 1f;

        [Tooltip("转弯时要转动船只。")] [Range(0, 1)] [SerializeField]
        float _TurningHeel = 0.35f;

        [Tooltip("对浮力变化应用曲线处理。")] [SerializeField]
        AnimationCurve _BuoyancyCurveFactor = new(new Keyframe[]
        {
            new(0, 0, 0.01267637f, 0.01267637f),
            new(0.6626424f, 0.1791001f, 0.8680198f, 0.8680198f), new(1, 1, 3.38758f, 3.38758f)
        });


        /// <summary>
        /// 使用中
        /// </summary>
        public bool IsUse;

        /// <summary>
        /// 船站立位置
        /// </summary>
        public Transform standPlace;

        /// <summary>
        /// 浮力组件
        /// </summary>
        private FloatingObject _floatingObject;
        
        private float _BuoyancyFactor = 1f;
        private void Awake()
        {
            if (_floatingObject == null) _floatingObject = GetComponent<FloatingObject>();
        }

        private void FixedUpdate()
        {
            if (!IsUse) return;
            if (!_floatingObject.InWater) return;
            
            var input = Vector3.zero;
            Vector2 moveInput = InputManager.GetMovementInput();
            input.x = moveInput.x; // 水平转向（x轴）
            input.z = moveInput.y; // 前后移动（y轴映射到z轴）
            var rb = _floatingObject.RigidBody;

            // Thrust
            var forcePosition = rb.worldCenterOfMass + _ForceHeightOffset * Vector3.up;
            rb.AddForceAtPosition(_ThrustPower * input.z * transform.forward, forcePosition, ForceMode.Acceleration);

            // Steer
            var rotation = transform.up + _TurningHeel * transform.forward;
            rb.AddTorque(_SteerPower * input.x * rotation, ForceMode.Acceleration);

            if (input.y > 0f)
            {
                if (_BuoyancyFactor < 1f)
                {
                    _BuoyancyFactor += Time.deltaTime * 0.1f;
                    _BuoyancyFactor = Mathf.Clamp(_BuoyancyFactor, 0f, 1f);
                    _floatingObject.BuoyancyForceStrength = _BuoyancyCurveFactor.Evaluate(_BuoyancyFactor);
                }
            }
            else if (input.y < 0f)
            {
                if (_BuoyancyFactor > 0f)
                {
                    _BuoyancyFactor -= Time.deltaTime * 0.1f;
                    _BuoyancyFactor = Mathf.Clamp(_BuoyancyFactor, 0f, 1f);
                    _floatingObject.BuoyancyForceStrength = _BuoyancyCurveFactor.Evaluate(_BuoyancyFactor);
                }
            }
        }
    }
}