using UnityEngine;

/// <summary>
/// 混沌之门：被占领后按固定间隔从所属阵营卡组随机出兵。
/// </summary>
[RequireComponent(typeof(CrystalMineCapture))]
public class ChaosGateSpawner : MonoBehaviour
{
    [Header("出兵配置")]
    [Min(1f)] public float spawnInterval = 12f;
    [Min(0f)] public float spawnRadius = 1.5f;
    public bool spawnImmediatelyOnCapture = false;

    [Header("蓝方卡组")]
    [SerializeField] private string[] blueDeckDataNames =
    {
        "人类士兵Data", "弓箭手Data", "盾卫Data", "精锐士兵Data",
        "法师Data", "狂暴狼人Data", "石巨人Data", "弓箭猎人Data"
    };

    private CrystalMineCapture capture;
    private UnitTeam unitTeam;
    private float spawnTimer;
    private int previousTeamId = 2;

    private void Awake()
    {
        capture = GetComponent<CrystalMineCapture>();
        unitTeam = GetComponent<UnitTeam>();
        spawnTimer = spawnInterval;
    }

    private void Update()
    {
        if (unitTeam == null)
        {
            unitTeam = GetComponent<UnitTeam>();
            if (unitTeam == null) return;
        }

        int currentTeamId = unitTeam.teamId;
        if (currentTeamId != previousTeamId)
        {
            previousTeamId = currentTeamId;
            spawnTimer = spawnImmediatelyOnCapture ? 0f : spawnInterval;
        }

        if (currentTeamId != 0 && currentTeamId != 1)
        {
            spawnTimer = spawnInterval;
            return;
        }

        spawnTimer -= Time.deltaTime;
        if (spawnTimer > 0f) return;

        if (TrySpawn(currentTeamId))
            spawnTimer = spawnInterval;
        else
            spawnTimer = 1f;
    }

    private bool TrySpawn(int teamId)
    {
        Vector3 position = transform.position;
        position.x += Random.Range(-spawnRadius, spawnRadius);
        position.z += Random.Range(-spawnRadius, spawnRadius);

        if (teamId == 1)
        {
            EnemyCastleAI enemyAI = FindObjectOfType<EnemyCastleAI>();
            return enemyAI != null && enemyAI.TrySpawnFromPortal(position, transform.rotation);
        }

        CharacterData card = ChooseBlueCard();
        if (card == null || CastleSpawnManager.Instance == null)
            return false;

        return SpawnBlueUnit(card, position, transform.rotation);
    }

    private CharacterData ChooseBlueCard()
    {
        CharacterData[] cards = new CharacterData[blueDeckDataNames.Length];
        int validCount = 0;
        foreach (string dataName in blueDeckDataNames)
        {
            CharacterData data = Resources.Load<CharacterData>("Data/" + dataName);
            if (data != null && data.unitPrefab != null)
                cards[validCount++] = data;
        }

        if (validCount == 0) return null;

        float totalWeight = 0f;
        for (int i = 0; i < validCount; i++)
            totalWeight += 1f / Mathf.Max(1, cards[i].manaCost);

        float roll = Random.value * totalWeight;
        for (int i = 0; i < validCount; i++)
        {
            roll -= 1f / Mathf.Max(1, cards[i].manaCost);
            if (roll <= 0f) return cards[i];
        }
        return cards[validCount - 1];
    }

    private bool SpawnBlueUnit(CharacterData data, Vector3 position, Quaternion rotation)
    {
        if (ManaSystem.Instance == null || !ManaSystem.Instance.TryConsumeMana(data.manaCost))
            return false;

        GameObject unit = Instantiate(data.unitPrefab, position, rotation);
        UnitTeam team = unit.GetComponent<UnitTeam>();
        if (team != null)
        {
            team.teamId = 0;
            unit.tag = "Friend";
        }

        UnitBase unitBase = unit.GetComponent<UnitBase>();
        if (unitBase != null)
        {
            unitBase.InitializeFromPlayerData(data.GetMaxHealth(1), data.GetAttackPower(1), data.GetMoveSpeed(1));
        }

        return true;
    }

}