using System;
using System.Collections;
using System.Collections.Generic;
using DG.Tweening;
using Unity.VisualScripting;
using UnityEngine;

public class TurnCharacterManager : MonoBehaviour
{
    // ========== SerializeField ==============
    [SerializeField] private float screenOffsetLeft = 8f;
    [SerializeField] private float screenOffsetRight = 6f;


    // ========== Private ======================
    private readonly List<Vector3> player_position_list = new();
    private readonly List<Vector3> enemy_position_list = new();

    // private Vector3 cardDeckWorldPosition;
    private const int POSITION_NUMBER = 3;
    private bool is_setup;
    private Camera main_camera;
    private TurnManagerSingleton manager_singleton;

    private void Awake()
    {
        CharacterManagerEvent.OnCharacterManagerSetup += setup_character_manager;
    }

    private void setup_character_manager()
    {
        if (is_setup) return;
        manager_singleton = TurnManagerSingleton.Instance;
        if (manager_singleton.GetNeedDebugLog()) TurnManagerSingleton.print_msg("CharacterManager", "初始化", "初始化成功");
        main_camera = Camera.main;
        is_setup = true;
    }

    public List<Card> render_character_sprite_return_card_list(List<GameObject> player_list, Transform player_container,
        Transform card_deck_container, List<GameObject> enemy_list, Transform enemy_container)
    {
        math_sprite_world_position(player_container);
        List<Card> card_deck = new();
        render_friend_gameobject();
        render_enemy_gameobject();
        return card_deck;


        void render_friend_gameobject()
        {
            for (var i = 0; i < POSITION_NUMBER; i++)
            {
                GameObject character_prefab = Instantiate<GameObject>(player_list[i].gameObject,
                    position: player_position_list[i],
                    rotation: Quaternion.identity,
                    parent: player_container
                );
                int characterID = 100000 + (i + 1) * 10;
                character_prefab.name = $"Character_{characterID}";
                Character character_component = character_prefab.GetComponent<Character>();
                var a_character_card = character_component.setup_character(characterID, card_deck_container, main_camera, true);
                card_deck.AddRange(a_character_card);
            }
        }

        void render_enemy_gameobject()
        {
            for (var i = 0; i < enemy_list.Count; i++)
            {
                // rotation 旋转180度
                GameObject enemyPrefab = Instantiate<GameObject>(enemy_list[i].gameObject,
                    position: enemy_position_list[i],
                    rotation: Quaternion.Euler(0, 180, 0),
                    parent: enemy_container
                );
                int enemyID = 700000 + (i + 1) * 10;
                enemyPrefab.name = $"Enemy_{enemyID}";
                Character characterComponent = enemyPrefab.GetComponent<Character>();
                characterComponent.setup_character(enemyID, enemy_container, main_camera, false);
                Transform canvas = enemyPrefab.transform.GetChild(1);
                canvas.Rotate(0, 180, 0);
            }
        }
    }

    private void math_sprite_world_position(Transform player_container)
    {
        // 计算屏幕边界
        float screen_half = Screen.width / 2f;
        float screen_offset_right = screen_half / screenOffsetRight; // 屏幕右边的偏移 
        float screen_offset_left = screen_half / screenOffsetLeft; // 屏幕左边的偏移
        float in_fact_space = screen_half - screen_offset_right - screen_offset_left; // 屏幕内实际可用空间
        float sprite_space = in_fact_space / 3f; // 3张牌的实际可用空间
        float sprite_offset = (sprite_space * 0 + sprite_space * 1) / 2f; // 每个角色偏移一个单位
        for (int i = 0; i < 3; i++)
        {
            float position_x_player = screen_offset_left + i * sprite_space + sprite_offset;
            float position_x_enemy = screen_half + screen_offset_right + i * sprite_space + sprite_offset;
            player_position_list.Add(switch_screen_position_to_world_position(position_x_player));
            enemy_position_list.Add(switch_screen_position_to_world_position(position_x_enemy));
        }

        return;

        Vector3 switch_screen_position_to_world_position(float screen_position_x)
        {
            Vector3 world_position = main_camera!.ScreenToWorldPoint(new Vector3(screen_position_x, Screen.height / 2f, 0));
            world_position.y += player_container.transform.position.y;
            world_position.z = 0;
            return world_position;
        }
    }
}