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

public class CardLayout : MonoBehaviour
{
    public List<GameObject> cardPrefabs; // 卡片预制体
    public Vector2 centerPosition = new Vector2(0, 100);
    public int cardNumber = 0;
    public float cardRotationAngle = 1f;
    public float fanShapeMaxRadius = 800f;
    public float fanShapeMaxAngle = 60f;
    private RectTransform card_container;
    private readonly string card_container_name = "CardContainer";
    private List<RectTransform> card_list = new List<RectTransform>(); // 存储当前所有卡片

    private void Start()
    {
        card_container = transform.Find(card_container_name).GetComponent<RectTransform>();
        m_self_debug_create_card();
        m_self_set_card_layout_with_single();
        // m_self_debug_set_card();
    }

    private void m_self_set_card_layout_with_single()
    {
        if (cardNumber / 2 == 0) return;
        if (cardNumber == 0) return;
        float halfAngle = fanShapeMaxAngle / 2f;
        for (int i = 0; i < cardNumber; i++)
        {
            // 均匀角度分布
            float t = (cardNumber == 1) ? 0.5f : (float)i / (cardNumber - 1);
            float angleDeg = -halfAngle + t * fanShapeMaxAngle;
            float angleRad = angleDeg * Mathf.Deg2Rad;

            // 弧线坐标计算
            float x = fanShapeMaxRadius * Mathf.Sin(angleRad);
            float y = fanShapeMaxRadius * (1 - Mathf.Cos(angleRad));

            // 应用到 UI 坐标
            Vector2 pos = centerPosition + new Vector2(x, y);
            card_list[i].anchoredPosition = pos;

            // 设置旋转（Z 轴）
            float rotZ = -angleDeg * cardRotationAngle;
            card_list[i].localRotation = Quaternion.Euler(0, 0, rotZ);
            card_list[i].gameObject.SetActive(true);
        }
    }

    private void m_self_set_card_layout_with_double()
    {
        if (cardNumber / 2 != 0) return;
    }

    private void m_self_debug_create_card()
    {
        // 从卡片预制体中随机选择卡牌按照数量插入到当前手牌中
        for (var i = 0; i < cardNumber; i++)
        {
            GameObject _game_object = Instantiate(cardPrefabs[UnityEngine.Random.Range(0, cardPrefabs.Count)]);
            RectTransform _rect_transform = _game_object.GetComponent<RectTransform>();
            _rect_transform.name = "Card" + i;
            _rect_transform.SetParent(card_container);
            _game_object.SetActive(false);
            card_list.Add(_rect_transform);
        }
    }

    private void m_self_debug_set_card()
    {
        GameObject _game_object = Instantiate(cardPrefabs[0]);
        RectTransform _rect_transform = _game_object.GetComponent<RectTransform>();
        _rect_transform.name = "Card0";
        _rect_transform.SetParent(card_container);
        _rect_transform.anchoredPosition = centerPosition;
        // _rect_transform.localRotation = Quaternion.Euler(0, 0, 0);
    }
}