using System;
using Continentis;
using Continentis.MainGame;
using I2.Loc;
using SLSUtilities.General;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.Serialization;
using UnityEngine.UI;

namespace Continentis.Menu
{
    public class MenuManager : Singleton<MenuManager>
    {
        private const string CombatSceneName = "GameScene";

        [Header("主菜单按钮")]
        [FormerlySerializedAs("enterGameButton")]
        public Button newGameButton;
        public Button loadGameButton;

        [Header("面板")]
        public ConfirmOverrideRunPanel confirmOverrideRunPanel;

        [Header("跑局配置")]
        [Tooltip("新游戏使用的 RunConfig 资产")]
        public RunConfig runConfig;

        [Header("语言设置")]
        public string languageToSet;

        // ── 生命周期 ──────────────────────────────────────────────────────

        private void Start()
        {
            if (string.IsNullOrEmpty(languageToSet))
                languageToSet = "Simplified Chinese";
            LocalizationManager.CurrentLanguage = languageToSet;

            newGameButton.onClick.AddListener(OnNewGameClicked);
            loadGameButton.onClick.AddListener(OnContinueClicked);

            RefreshButtons();
        }

        // ── 按钮事件 ──────────────────────────────────────────────────────

        /// <summary>
        /// 新游戏按钮：若已有进行中的跑局则弹出确认框，否则直接开始。
        /// </summary>
        private void OnNewGameClicked()
        {
            if (SaveManager.Instance.HasActiveRun())
                confirmOverrideRunPanel.Show(StartNewRun);
            else
                StartNewRun();
        }

        /// <summary>继续游戏按钮：设置意图后加载战斗场景。</summary>
        private void OnContinueClicked()
        {
            InfoTransistor.Instance.menuToMainGame.menuIntent = InfoTransistor.Menu.MenuIntent.ContinueRun;
            InfoTransistor.Instance.menuToMainGame.pendingRunConfig = null;
            SceneManager.LoadScene(CombatSceneName);
        }

        // ── 内部方法 ──────────────────────────────────────────────────────

        /// <summary>根据存档状态刷新按钮可交互性。</summary>
        private void RefreshButtons()
        {
            bool hasActiveRun = SaveManager.Instance.HasActiveRun();
            newGameButton.interactable = true;
            loadGameButton.interactable = hasActiveRun;
        }

        /// <summary>写入意图并加载战斗场景，由新游戏流程调用。</summary>
        private void StartNewRun()
        {
            if (runConfig == null)
            {
                Debug.LogError("[Menu] 未指定 RunConfig，无法开始新跑局。请在 MenuManager Inspector 中赋值。");
                return;
            }

            InfoTransistor.Instance.menuToMainGame.menuIntent = InfoTransistor.Menu.MenuIntent.StartNewRun;
            InfoTransistor.Instance.menuToMainGame.pendingRunConfig = runConfig;
            SceneManager.LoadScene(CombatSceneName);
        }
    }
}