using UnityEngine;
using UnityEngine.InputSystem;
using System.Collections.Generic;

public class GameManager : MonoBehaviour
{
    public static GameManager Instance { get; private set; }

    [Header("Game State")]
    public bool isPaused = false;

    [Header("Systems")]
    public ResourceManager resourceManager;
    public TimeManager timeManager;
    public VillagerManager villagerManager;
    public SelectionManager selectionManager;

    void Awake()
    {
        // Singleton pattern
        if (Instance != null && Instance != this)
        {
            Destroy(gameObject);
            return;
        }
        Instance = this;
        DontDestroyOnLoad(gameObject);

        // Initialize systems
        InitializeSystems();
    }

    void InitializeSystems()
    {
        // Get or create system components
        resourceManager = GetComponent<ResourceManager>();
        if (resourceManager == null)
            resourceManager = gameObject.AddComponent<ResourceManager>();

        timeManager = GetComponent<TimeManager>();
        if (timeManager == null)
            timeManager = gameObject.AddComponent<TimeManager>();

        villagerManager = GetComponent<VillagerManager>();
        if (villagerManager == null)
            villagerManager = gameObject.AddComponent<VillagerManager>();

        selectionManager = GetComponent<SelectionManager>();
        if (selectionManager == null)
            selectionManager = gameObject.AddComponent<SelectionManager>();
    }

    void Start()
    {
        // Initialize starting resources
        resourceManager.AddResource(ResourceType.Wood, 50);
        resourceManager.AddResource(ResourceType.Stone, 30);
        resourceManager.AddResource(ResourceType.Food, 100);
    }

    void Update()
    {
        // Handle pause/unpause
        if (UnityEngine.InputSystem.Keyboard.current.spaceKey.wasPressedThisFrame)
        {
            TogglePause();
        }
    }

    public void TogglePause()
    {
        isPaused = !isPaused;
        timeManager.SetPaused(isPaused);
    }
}