using System;
using System.Collections.Generic;
using System.Numerics;
using UnityEngine;
using Quaternion = UnityEngine.Quaternion;
using Vector3 = UnityEngine.Vector3;

namespace Gameplay.Player
{
    public class PlayerCardsController : MonoBehaviour
    {
        [SerializeField] private float radius = 2f; // 卡牌围绕玩家旋转的半径
        [SerializeField] private float rotationSpeed = 50f; // 卡牌旋转
        [SerializeField] private float highOffset = 1f; // 卡牌高度偏移
        public bool IsRotating = true; // 是否旋转卡牌
        [SerializeField] private GameObject cardPrefab; // 卡牌预制体

        public List<CardViewer> Cards;
        private Transform playerTransform;

        private void Update()
        {
            if (Cards != null)
            {
                //RotateCards();
            }
        }

        // 生成卡牌实体
        // 生成的卡牌实体围绕着玩家旋转
        public void GenerateCards(List<Card> cards)
        {
            playerTransform = this.transform;
            Cards = new List<CardViewer>();
            for (int i = 0; i < cards.Count; i++)
            {
                float angle = i * (360f / cards.Count);
                float rad = angle * Mathf.Deg2Rad;
                Vector3 cardPosition = new Vector3(
                    playerTransform.position.x + radius * Mathf.Cos(rad),
                    playerTransform.position.y + highOffset,
                    playerTransform.position.z + radius * Mathf.Sin(rad)
                );
                
                GameObject cardObject = Instantiate(cardPrefab, cardPosition, Quaternion.identity);
                
                Vector3 playerPosition = new Vector3(
                    playerTransform.position.x,
                    playerTransform.position.y + highOffset,
                    playerTransform.position.z
                );
                Cards[i].transform.LookAt(playerPosition);
                
                CardViewer cardViewer = cardObject.GetComponent<CardViewer>();
                cardViewer.SetCard(cards[i]);
                Cards.Add(cardViewer);
            }
        }

        // 旋转已经生成的卡牌实体
        public void RotateCards()
        {
            if (!IsRotating) return;
            for (int i = 0; i < Cards.Count; i++)
            {
                float angle = i * (360f / Cards.Count) + Time.time * rotationSpeed;
                float rad = angle * Mathf.Deg2Rad;
                Vector3 cardPosition = new Vector3(
                    playerTransform.position.x + radius * Mathf.Cos(rad),
                    playerTransform.position.y + highOffset,
                    playerTransform.position.z + radius * Mathf.Sin(rad)
                );
                Cards[i].transform.position = cardPosition;

                Vector3 playerPosition = new Vector3(
                    playerTransform.position.x,
                    playerTransform.position.y + highOffset,
                    playerTransform.position.z
                    );

                Cards[i].transform.LookAt(playerPosition);
                // 卡牌绕着y轴旋转180度，从而让卡牌正面朝向玩家
                Cards[i].transform.Rotate(0, 180, 0);
            }
        }
        
        public void StopRotatingCards()
        {
            IsRotating = false;
        }
        
        public void StartRotatingCards()
        {
            IsRotating = true;
        }

        // 删除卡牌实体
        public void DeleteCards(CardViewer card)
        {
            Cards.Remove(card);
            Destroy(card.gameObject);
        }

        public void ClearCards()
        {
            foreach (var card in Cards)
            {
                Destroy(card.gameObject);
            }

            Cards.Clear();
        }
    }
}