using System;
using System.Collections.Generic;
using System.Linq;
using BlueWater.Utility;
using UnityEngine;
using Random = System.Random;   

namespace BlueWater.Tycoons
{
    [DefaultExecutionOrder(-1)]
    public class CustomerTableController : MonoBehaviour
    {
        [SerializeField]
        private Transform _customerTableRoot;
        
        [SerializeField]
        private List<CustomerTable> _customerTables;
        
        [SerializeField]
        private List<CustomerTable> _activeCustomerTables;

        private Random _random = new();
        private AstarPath _astarPath;

        private void Awake()
        {
            _astarPath = FindAnyObjectByType<AstarPath>();
            _customerTables = _customerTableRoot.GetComponentsInChildren<CustomerTable>().ToList();

            for (var i = 0; i < _customerTables.Count; i++)
            {
                HideCustomerTable(i);
            }
        }

        public void RegisterTable(CustomerTable table)
        {
            Utils.RegisterList(_activeCustomerTables, table);
            _astarPath.Scan();
        }

        public void UnregisterTable(CustomerTable table)
        {
            Utils.UnregisterList(_activeCustomerTables, table);
            _astarPath.Scan();
        }
        
        public TableSeat FindEmptySeat()
        {
            var tableCount = _activeCustomerTables.Count;
            var indices = new List<int>(Enumerable.Range(0, tableCount));

            while (indices.Count > 0)
            {
                var randomIndex = _random.Next(indices.Count);
                var tableIndex = indices[randomIndex];
                indices.RemoveAt(randomIndex);

                var emptySeat = _activeCustomerTables[tableIndex].FindEmptySeat();
                if (emptySeat != null)
                {
                    return emptySeat;
                }
            }
            return null;
        }

        public void ShowCustomerTable(int index)
        {
            _customerTables[index].gameObject.SetActive(true);
        }
        
        public void HideCustomerTable(int index)
        {
            _customerTables[index].gameObject.SetActive(false);
        }
    }
}