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

public class CharacterManager : MonoBehaviour
{
    // ========= SerializeField =============
    [SerializeField] private List<GameObject> friendPrefabs;
    [SerializeField] private List<GameObject> enemyPrefabs;
    [SerializeField] private Transform characterContainer;
    [SerializeField] private Transform enemyContainer;
    [SerializeField] private Camera mainCamera;
    [SerializeField] private bool showDebugObject = false;


    // ========== Public ==============
    private readonly List<Vector3> enemyPositionList = new List<Vector3>();
    private readonly List<Vector3> characterPositionList = new List<Vector3>();
    private readonly List<Character> renderCharacterList = new List<Character>();
    private readonly List<Character> renderEnemyList = new List<Character>();
    // ========== Private ================

    private GameObject debug_object;


    private void Start()
    {
        if (mainCamera == null) mainCamera = Camera.main;

        // debug_object = Instantiate<GameObject>(friendPrefabs[0],
        //     Vector3.zero + characterContainer.position, Quaternion.identity, characterContainer);
        // debug_object.name = "DebugObject";
        // debug_object.SetActive(showDebugObject);
        // math_world_position_point();
        // render_character_sprite(true);
        // render_character_sprite(false);
    }


    public void RenderCharacterSprite()
    {
        for (var i = 0; i < friendPrefabs.Count; i++)
        {
            STRUCT_TURN_CHARACTER.CHARACTER_RENDER_DATA characterRenderData;
            characterRenderData.IS_ENEMY = false;
            characterRenderData.RENDER_POSITION = characterPositionList[i];
            characterRenderData.RENDER_PREFAB = friendPrefabs[i];
            characterRenderData.NAME = "Character_" + i;
            characterRenderData.ROTATION = Quaternion.identity;
            Transform parent_transform = characterContainer;
            GameObject character = Instantiate<GameObject>(
                characterRenderData.RENDER_PREFAB,
                position: characterRenderData.RENDER_POSITION,
                rotation: Quaternion.identity,
                parent: parent_transform);
            character.name = characterRenderData.NAME;
            Character character_component = character.GetComponent<Character>();
            character_component.SetCharacterRenderData(characterRenderData);
            renderCharacterList.Add(character_component);
        }
    }

    public void RenderEnemySprite()
    {
        for (var i = 0; i < enemyPrefabs.Count; i++)
        {
            STRUCT_TURN_CHARACTER.CHARACTER_RENDER_DATA characterRenderData;
            characterRenderData.IS_ENEMY = true;
            characterRenderData.RENDER_POSITION = enemyPositionList[i];
            characterRenderData.RENDER_PREFAB = enemyPrefabs[i];
            characterRenderData.NAME = "Enemy_" + i;
            characterRenderData.ROTATION = Quaternion.Euler(0, 180, 0);
            Transform parent_transform = enemyContainer;
            GameObject character = Instantiate<GameObject>(
                characterRenderData.RENDER_PREFAB,
                position: characterRenderData.RENDER_POSITION,
                rotation: Quaternion.identity,
                parent: parent_transform);
            character.name = characterRenderData.NAME;
            character.transform.GetChild(0).rotation = characterRenderData.ROTATION;
            Character character_component = character.GetComponent<Character>();
            character_component.SetCharacterRenderData(characterRenderData);
            renderEnemyList.Add(character_component);
        }
    }

    public void MathWorldPositionPoint()
    {
        // 计算屏幕边界
        float screen_half = Screen.width / 2f;
        float screen_offset_right = screen_half / 6f; // 屏幕右边的偏移 
        float screen_offset_left = screen_half / 8f; // 屏幕左边的偏移
        float screen_in_fact_space = screen_half - screen_offset_right - screen_offset_left; // 屏幕内实际可用空间
        float sprite_space = screen_in_fact_space / 3f; // 3张牌的实际可用空间
        float _sprite_offset = (sprite_space * 0 + sprite_space * 1) / 2f; // 3张牌每张偏移
        for (int i = 0; i < 3; i++)
        {
            float position_x = screen_offset_left + i * sprite_space + _sprite_offset;
            float position_x_enemy = screen_half + screen_offset_right + i * sprite_space + _sprite_offset;
            characterPositionList.Add(switch_screen_position_to_world_position(position_x));
            enemyPositionList.Add(switch_screen_position_to_world_position(position_x_enemy));
        }

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