using UnityEngine;
using System.Collections.Generic;
using System.Linq;

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

    [Header("Available Facilities")]
    [SerializeField] private List<Facility> hotelFacilities = new List<Facility>();

    [Header("Facility Prefabs")]
    [SerializeField] private GameObject restaurantPrefab;
    [SerializeField] private GameObject barPrefab;
    [SerializeField] private GameObject gymPrefab;
    [SerializeField] private GameObject playAreaPrefab;
    [SerializeField] private GameObject valetStationPrefab;

    // Events
    public System.Action<Facility> OnFacilityAdded;
    public System.Action<Facility> OnFacilityRemoved;
    public System.Action<Guest, Facility> OnFacilityUsed;

    private void Awake()
    {
        if (Instance != null && Instance != this)
        {
            Destroy(this.gameObject);
            return;
        }
        Instance = this;
    }

    private void Start()
    {
        InitializeFacilities();
    }

    #region Initialization
    private void InitializeFacilities()
    {
        // Find existing facilities in the scene
        Facility[] existingFacilities = FindObjectsOfType<Facility>();
        foreach (Facility facility in existingFacilities)
        {
            if (!hotelFacilities.Contains(facility))
            {
                hotelFacilities.Add(facility);
            }
        }

        Debug.Log($"Initialized with {hotelFacilities.Count} facilities");
    }
    #endregion

    #region Facility Management
    public bool AddFacility(FacilityType facilityType, Vector3 position, Room associatedRoom = null)
    {
        GameObject facilityPrefab = GetFacilityPrefab(facilityType);
        if (facilityPrefab == null)
        {
            facilityPrefab = CreateDefaultFacilityPrefab(facilityType);
        }

        GameObject facilityObj = Instantiate(facilityPrefab, position, Quaternion.identity);
        Facility facility = facilityObj.GetComponent<Facility>();

        if (facility == null)
        {
            facility = facilityObj.AddComponent<Facility>();
        }

        // Configure facility
        facility.Initialize(facilityType, associatedRoom);

        hotelFacilities.Add(facility);
        OnFacilityAdded?.Invoke(facility);

        Debug.Log($"Added facility: {facilityType} at {position}");
        return true;
    }

    public bool RemoveFacility(Facility facility)
    {
        if (facility == null || !hotelFacilities.Contains(facility))
        {
            return false;
        }

        hotelFacilities.Remove(facility);
        OnFacilityRemoved?.Invoke(facility);

        Destroy(facility.gameObject);
        Debug.Log($"Removed facility: {facility.Type}");
        return true;
    }

    private GameObject GetFacilityPrefab(FacilityType facilityType)
    {
        switch (facilityType)
        {
            case FacilityType.Restaurant:
                return restaurantPrefab;
            case FacilityType.Bar:
                return barPrefab;
            case FacilityType.Gym:
                return gymPrefab;
            case FacilityType.PlayArea:
                return playAreaPrefab;
            case FacilityType.ValetParking:
                return valetStationPrefab;
            default:
                return null;
        }
    }

    private GameObject CreateDefaultFacilityPrefab(FacilityType facilityType)
    {
        GameObject facility = GameObject.CreatePrimitive(PrimitiveType.Cube);
        facility.name = facilityType.ToString();
        facility.transform.localScale = new Vector3(2f, 1f, 2f);

        // Set color based on facility type
        Color facilityColor = GetFacilityColor(facilityType);
        facility.GetComponent<Renderer>().material.color = facilityColor;

        return facility;
    }

    private Color GetFacilityColor(FacilityType facilityType)
    {
        switch (facilityType)
        {
            case FacilityType.Restaurant: return Color.red;
            case FacilityType.Bar: return new Color(0.5f, 0.2f, 0f); // Brown
            case FacilityType.Gym: return Color.yellow;
            case FacilityType.PlayArea: return Color.green;
            case FacilityType.ValetParking: return Color.blue;
            case FacilityType.Spa: return Color.magenta;
            case FacilityType.BusinessCenter: return Color.gray;
            case FacilityType.LaundryService: return Color.white;
            default: return Color.gray;
        }
    }
    #endregion

    #region Facility Queries
    public List<Facility> GetFacilitiesByType(FacilityType facilityType)
    {
        return hotelFacilities.Where(f => f.Type == facilityType).ToList();
    }

    public List<Facility> GetAvailableFacilities()
    {
        return hotelFacilities.Where(f => f.IsOperational).ToList();
    }

    public Facility GetNearestFacility(Vector3 position, FacilityType facilityType)
    {
        var facilitiesOfType = GetFacilitiesByType(facilityType);

        return facilitiesOfType
            .Where(f => f.IsOperational)
            .OrderBy(f => Vector3.Distance(f.transform.position, position))
            .FirstOrDefault();
    }

    public bool HasFacility(FacilityType facilityType)
    {
        return GetFacilitiesByType(facilityType).Any(f => f.IsOperational);
    }

    public float GetFacilitySatisfactionRating(FacilityType facilityType)
    {
        var facilities = GetFacilitiesByType(facilityType);
        if (facilities.Count == 0) return 0f;

        return facilities.Average(f => f.QualityRating);
    }
    #endregion

    #region Wish Fulfillment
    public bool CanFulfillWish(WishType wishType)
    {
        FacilityType requiredFacility = GetRequiredFacilityForWish(wishType);
        return HasFacility(requiredFacility);
    }

    public Facility FindFacilityForWish(WishType wishType, Vector3 guestPosition)
    {
        FacilityType requiredFacility = GetRequiredFacilityForWish(wishType);
        return GetNearestFacility(guestPosition, requiredFacility);
    }

    private FacilityType GetRequiredFacilityForWish(WishType wishType)
    {
        switch (wishType)
        {
            case WishType.Restaurant:
                return FacilityType.Restaurant;
            case WishType.BarService:
                return FacilityType.Bar;
            case WishType.PlayArea:
                return FacilityType.PlayArea;
            case WishType.ValetParking:
                return FacilityType.ValetParking;
            case WishType.WashingService:
            case WishType.CleaningService:
                return FacilityType.LaundryService;
            case WishType.ActivityPlanning:
                return FacilityType.BusinessCenter;
            case WishType.RoomService:
                return FacilityType.Restaurant; // Room service originates from restaurant
            default:
                return FacilityType.None;
        }
    }

    public float CalculateWishFulfillmentBonus(Guest guest)
    {
        if (guest?.Wishes == null) return 0f;

        float totalBonus = 0f;
        int fulfilledWishes = 0;

        foreach (var wish in guest.Wishes)
        {
            if (CanFulfillWish(wish.wishType))
            {
                totalBonus += wish.importance;
                fulfilledWishes++;
            }
        }

        // Bonus scales with the percentage of wishes that can be fulfilled
        float fulfillmentRate = guest.Wishes.Count > 0 ? (float)fulfilledWishes / guest.Wishes.Count : 0f;

        return totalBonus * fulfillmentRate;
    }
    #endregion

    #region Statistics and Information
    public List<Facility> GetAllFacilities()
    {
        return new List<Facility>(hotelFacilities);
    }

    public int GetFacilityCount(FacilityType facilityType)
    {
        return GetFacilitiesByType(facilityType).Count;
    }

    public Dictionary<FacilityType, int> GetFacilityCountByType()
    {
        Dictionary<FacilityType, int> counts = new Dictionary<FacilityType, int>();

        foreach (FacilityType type in System.Enum.GetValues(typeof(FacilityType)))
        {
            counts[type] = GetFacilityCount(type);
        }

        return counts;
    }

    public float GetOverallFacilityRating()
    {
        if (hotelFacilities.Count == 0) return 0f;

        return hotelFacilities.Average(f => f.QualityRating);
    }
    #endregion
}

// Facility Component
public class Facility : MonoBehaviour
{
    [Header("Facility Info")]
    [SerializeField] private FacilityType facilityType = FacilityType.None;
    [SerializeField] private string facilityName;
    [SerializeField] private bool isOperational = true;

    [Header("Quality and Capacity")]
    [SerializeField] private float qualityRating = 0.7f; // 0 to 1
    [SerializeField] private int maxCapacity = 10;
    [SerializeField] private List<Guest> currentUsers = new List<Guest>();

    [Header("Associated Room")]
    [SerializeField] private Room associatedRoom;

    [Header("Staff Requirements")]
    [SerializeField] private List<Staff.StaffType> requiredStaffTypes = new List<Staff.StaffType>();
    [SerializeField] private int minStaffCount = 1;

    // Events
    public System.Action<Guest> OnGuestUseFacility;
    public System.Action<Guest> OnGuestLeaveFacility;

    #region Properties
    public FacilityType Type => facilityType;
    public string FacilityName => string.IsNullOrEmpty(facilityName) ? facilityType.ToString() : facilityName;
    public bool IsOperational => isOperational && HasRequiredStaff();
    public float QualityRating => qualityRating;
    public int CurrentCapacity => currentUsers.Count;
    public int MaxCapacity => maxCapacity;
    public bool HasCapacity => CurrentCapacity < MaxCapacity;
    public Room AssociatedRoom => associatedRoom;
    #endregion

    public void Initialize(FacilityType type, Room room = null)
    {
        facilityType = type;
        associatedRoom = room;

        SetupFacilityDefaults();

        Debug.Log($"Initialized facility: {FacilityName}");
    }

    private void SetupFacilityDefaults()
    {
        switch (facilityType)
        {
            case FacilityType.Restaurant:
                maxCapacity = 20;
                requiredStaffTypes.Add(Staff.StaffType.Chef);
                break;
            case FacilityType.Bar:
                maxCapacity = 15;
                requiredStaffTypes.Add(Staff.StaffType.Chef); // Bartender would be ideal, but using chef for now
                break;
            case FacilityType.PlayArea:
                maxCapacity = 30;
                break;
            case FacilityType.ValetParking:
                maxCapacity = 50;
                requiredStaffTypes.Add(Staff.StaffType.Valet);
                break;
            case FacilityType.LaundryService:
                maxCapacity = 5;
                requiredStaffTypes.Add(Staff.StaffType.Housekeeper);
                break;
        }
    }

    #region Guest Interaction
    public bool CanGuestUseFacility(Guest guest)
    {
        if (!IsOperational || !HasCapacity)
            return false;

        // Check if guest has specific requirements for this facility
        return true;
    }

    public bool AddGuest(Guest guest)
    {
        if (!CanGuestUseFacility(guest))
            return false;

        currentUsers.Add(guest);
        OnGuestUseFacility?.Invoke(guest);

        Debug.Log($"Guest {guest.GuestName} is now using {FacilityName}");
        return true;
    }

    public bool RemoveGuest(Guest guest)
    {
        if (!currentUsers.Contains(guest))
            return false;

        currentUsers.Remove(guest);
        OnGuestLeaveFacility?.Invoke(guest);

        Debug.Log($"Guest {guest.GuestName} has left {FacilityName}");
        return true;
    }
    #endregion

    #region Staff Management
    private bool HasRequiredStaff()
    {
        if (requiredStaffTypes.Count == 0)
            return true;

        if (StaffManager.Instance == null)
            return false;

        foreach (var staffType in requiredStaffTypes)
        {
            if (StaffManager.Instance.GetStaffCount(staffType) < minStaffCount)
                return false;
        }

        return true;
    }

    public List<Staff.StaffType> GetRequiredStaffTypes()
    {
        return new List<Staff.StaffType>(requiredStaffTypes);
    }
    #endregion

    #region Facility Management
    public void SetOperational(bool operational)
    {
        isOperational = operational;

        if (!operational)
        {
            // Remove all current users
            var usersToRemove = new List<Guest>(currentUsers);
            foreach (var guest in usersToRemove)
            {
                RemoveGuest(guest);
            }
        }

        Debug.Log($"{FacilityName} is now {(operational ? "operational" : "closed")}");
    }

    public void UpgradeQuality(float qualityIncrease)
    {
        qualityRating = Mathf.Clamp01(qualityRating + qualityIncrease);
        Debug.Log($"{FacilityName} quality upgraded to {qualityRating:P0}");
    }

    public void IncreaseCapacity(int capacityIncrease)
    {
        maxCapacity += capacityIncrease;
        Debug.Log($"{FacilityName} capacity increased to {maxCapacity}");
    }
    #endregion

    private void OnMouseDown()
    {
        // Show facility info when clicked
        Debug.Log($"Facility: {FacilityName}\nType: {facilityType}\nOperational: {IsOperational}\nCapacity: {CurrentCapacity}/{MaxCapacity}\nQuality: {qualityRating:P0}");
    }

    private void OnDrawGizmosSelected()
    {
        // Draw facility area
        Gizmos.color = GetFacilityColor();
        Gizmos.DrawWireCube(transform.position, transform.localScale);

        // Draw capacity indicator
        Gizmos.color = Color.white;
        for (int i = 0; i < CurrentCapacity && i < 10; i++)
        {
            Vector3 userPos = transform.position + Vector3.up * (i * 0.5f + 1f);
            Gizmos.DrawWireSphere(userPos, 0.2f);
        }
    }

    private Color GetFacilityColor()
    {
        if (!IsOperational) return Color.gray;

        switch (facilityType)
        {
            case FacilityType.Restaurant: return Color.red;
            case FacilityType.Bar: return new Color(0.5f, 0.2f, 0f);
            case FacilityType.PlayArea: return Color.green;
            case FacilityType.ValetParking: return Color.blue;
            default: return Color.yellow;
        }
    }
}

// Enumerations
public enum FacilityType
{
    None,
    Restaurant,
    Bar,
    Gym,
    PlayArea,
    ValetParking,
    Spa,
    BusinessCenter,
    LaundryService,
    Pool,
    ConferenceRoom
}