using TMPro;
using UnityEngine;
using UnityEngine.UI;
using WarGame.Data;
using WarGame.Managers;

namespace WarGame.UI
{
    public class ShopCardUI : MonoBehaviour
    {
        [Header("UI References")]
        [SerializeField] private TMP_Text unitNameText;
        [SerializeField] private TMP_Text classTypeText;
        [SerializeField] private TMP_Text costText;
        [SerializeField] private TMP_Text statsSummaryText;
        [SerializeField] private TMP_Text tacticsInfoText;
        [SerializeField] private Image portraitImage;
        [SerializeField] private Button buyButton;

        private UnitDataSO currentUnitData;

        public void Setup(UnitDataSO unitData)
        {
            currentUnitData = unitData;
            if (unitData == null) return;

            if (unitNameText != null) unitNameText.text = unitData.unitName;
            if (classTypeText != null) classTypeText.text = unitData.unitClass.ToString();
            if (costText != null) costText.text = $"{unitData.goldCost} Gold";

            if (portraitImage != null && unitData.unitPortrait != null)
            {
                portraitImage.sprite = unitData.unitPortrait;
                portraitImage.gameObject.SetActive(true);
            }

            if (statsSummaryText != null)
            {
                statsSummaryText.text = $"HP: {unitData.maxHealth:0}  |  ATK: {unitData.attackDamage:0}  |  DEF: {unitData.defenseArmor:0}  |  SPD: {unitData.moveSpeed:0.0}";
            }

            if (tacticsInfoText != null)
            {
                string tacticsStr = "Tactics: ";
                if (unitData.unlockedTactics.Count > 0)
                {
                    for (int i = 0; i < unitData.unlockedTactics.Count; i++)
                    {
                        var t = unitData.unlockedTactics[i];
                        tacticsStr += $"[Lv.{t.requiredLevel}: {t.tacticType}] ";
                    }
                }
                else
                {
                    tacticsStr += "None";
                }
                tacticsInfoText.text = tacticsStr;
            }

            if (buyButton != null)
            {
                buyButton.onClick.RemoveAllListeners();
                buyButton.onClick.AddListener(OnBuyClicked);
            }

            UpdateInteractability();
        }

        private void OnBuyClicked()
        {
            if (currentUnitData == null || BattleManager.Instance == null) return;
            BattleManager.Instance.BuyAndDeployUnit(currentUnitData);
        }

        public void UpdateInteractability()
        {
            if (buyButton == null || BattleManager.Instance == null || currentUnitData == null) return;

            bool canAfford = BattleManager.Instance.CanAffordUnit(currentUnitData);
            bool isPrep = BattleManager.Instance.CurrentBattleState == BattleState.Preparation;

            buyButton.interactable = canAfford && isPrep;
        }
    }
}