using System.Text;
using TMPro;
using UnityEngine;
using UnityEngine.UI;
using WarGame.Managers;

namespace WarGame.UI
{
    public class BattleResultUI : MonoBehaviour
    {
        [Header("UI Panels")]
        [SerializeField] private GameObject resultPanel;

        [Header("Text Displays")]
        [SerializeField] private TMP_Text resultTitleText;
        [SerializeField] private TMP_Text goldRewardText;
        [SerializeField] private TMP_Text casualtiesText;
        [SerializeField] private TMP_Text levelUpReportText;

        [Header("Buttons")]
        [SerializeField] private Button continueButton;

        private void Start()
        {
            if (resultPanel != null)
            {
                resultPanel.SetActive(false);
            }

            if (BattleManager.Instance != null)
            {
                BattleManager.Instance.OnBattleCompleted += ShowBattleResults;
            }

            if (continueButton != null)
            {
                continueButton.onClick.AddListener(OnContinueClicked);
            }
        }

        private void OnDestroy()
        {
            if (BattleManager.Instance != null)
            {
                BattleManager.Instance.OnBattleCompleted -= ShowBattleResults;
            }
        }

        public void ShowBattleResults(BattleResultData results)
        {
            if (resultPanel == null) return;
            resultPanel.SetActive(true);

            if (resultTitleText != null)
            {
                if (results.isVictory)
                {
                    resultTitleText.text = "VICTORY!";
                    resultTitleText.color = new Color(0.2f, 1f, 0.4f);
                }
                else
                {
                    resultTitleText.text = "DEFEATED IN BATTLE";
                    resultTitleText.color = new Color(1f, 0.25f, 0.25f);
                }
            }

            if (goldRewardText != null)
            {
                goldRewardText.text = $"Gold Earned: +{results.goldEarned}";
            }

            if (casualtiesText != null)
            {
                casualtiesText.text = $"Surviving Units: {results.survivingPlayerUnits} / {results.totalPlayerUnits}\nEnemies Defeated: {results.enemyCasualties}";
            }

            if (levelUpReportText != null)
            {
                if (results.levelUpReports != null && results.levelUpReports.Count > 0)
                {
                    StringBuilder sb = new StringBuilder();
                    sb.AppendLine("<b>UNIT LEVEL UPS & TACTICS:</b>");
                    foreach (var report in results.levelUpReports)
                    {
                        sb.AppendLine($"• {report.unitName}: Reached Level {report.newLevel}!");
                    }
                    levelUpReportText.text = sb.ToString();
                }
                else
                {
                    levelUpReportText.text = "All surviving units gained experience.";
                }
            }
        }

        private void OnContinueClicked()
        {
            if (resultPanel != null)
            {
                resultPanel.SetActive(false);
            }

            if (BattleManager.Instance != null)
            {
                BattleManager.Instance.ContinueToNextRound();
            }
        }
    }
}