using System;
using Cielonos.MainGame.Characters;
using SLSUtilities.UI;
using TMPro;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.Serialization;
using UnityEngine.UI;

namespace Cielonos.MainGame.UI
{
    /// <summary>
    /// 结算画面 UI 页面（Demo 版本）。
    /// 在 RunPhase.Settlement 时自动打开，显示通关时间、稀有材料数量和受伤次数。
    /// 提供"重新开始"和"回到主菜单"两个按钮。
    /// </summary>
    public class SettlementUIPage : UIPageBase
    {
        // ================================================================
        // 序列化字段
        // ================================================================

        [Header("Stats")]
        [SerializeField] private TMP_Text clearTimeText;
        [SerializeField] private TMP_Text rareMaterialText;
        [SerializeField] private TMP_Text hurtCountText;

        [Header("Buttons")]
        [SerializeField] private Button restartButton;
        [SerializeField] private Button mainMenuButton;

        [FormerlySerializedAs("mainMenuSceneName")]
        [Header("Settings")]
        [Tooltip("回到主菜单时加载的场景名称")]
        [SerializeField] private string menuSceneName = "Menu";

        // ================================================================
        // 生命周期
        // ================================================================

        protected override void Start()
        {
            base.Start();
            RunManager.Instance.OnPhaseChanged += OnPhaseChanged;
            restartButton.onClick.AddListener(OnRestartClicked);
            mainMenuButton.onClick.AddListener(OnMainMenuClicked);
        }

        private void OnDestroy()
        {
            RunManager.Instance.OnPhaseChanged -= OnPhaseChanged;
        }

        // ================================================================
        // 阶段监听
        // ================================================================

        /// <summary>RunManager 阶段切换回调，进入 Settlement 时打开结算画面。</summary>
        private void OnPhaseChanged(RunPhase phase)
        {
            if (phase == RunPhase.Settlement)
                Open();
        }

        /// <summary>页面打开时填充统计数据。</summary>
        protected override void OnPageOpened()
        {
            base.OnPageOpened();
            PopulateStats();
        }

        // ================================================================
        // 数据填充
        // ================================================================

        /// <summary>根据当前 RunState 和玩家背包数据填充结算数据。</summary>
        private void PopulateStats()
        {
            RunState run = RunManager.Instance?.currentRun;

            // 通关时间（MM:SS 或 HH:MM:SS）
            if (clearTimeText != null)
            {
                float elapsed = run?.elapsedTime ?? 0f;
                TimeSpan ts = TimeSpan.FromSeconds(elapsed);
                clearTimeText.text = ts.TotalHours >= 1
                    ? $"{(int)ts.TotalHours:D2}:{ts.Minutes:D2}:{ts.Seconds:D2}"
                    : $"{ts.Minutes:D2}:{ts.Seconds:D2}";
            }

            // 稀有材料数量（从玩家背包读取）
            if (rareMaterialText != null)
            {
                int amount = 0;
                Player player = MainGameManager.Player;
                if (player != null)
                    amount = player.inventorySc.GetRareMaterialAmount();
                rareMaterialText.text = amount.ToString();
            }

            // 受伤次数（实际扣血次数，不含被盾完全抵挡的受击）
            if (hurtCountText != null)
            {
                int hurt = run?.hurtCount ?? 0;
                hurtCountText.text = hurt.ToString();
            }
        }

        // ================================================================
        // 按钮回调
        // ================================================================

        /// <summary>重新开始一局 Run：关闭结算画面并启动新一局。</summary>
        public void OnRestartClicked()
        {
            Close();
            if (RunManager.Instance != null)
                RunManager.Instance.StartNewRun();
        }

        /// <summary>回到主菜单：加载主菜单场景。</summary>
        public void OnMainMenuClicked()
        {
            SceneManager.LoadScene(menuSceneName);
        }
    }
}