using System.Collections.Generic;
using UnityEngine;
using VRShopping.Interact;
using VRShopping.Items;
using VRShopping.Player;
using VRShopping.Shopping;
using VRShopping.UI;

public class PlayerController : MonoBehaviour,ITransScenePossible
{
    private Animator _anim;

    //나중에 stateMachine으로 변경
    private bool _controlPositive = true;
    
    [SerializeField] private ShoppingOrderView _shoppingOrderView;
    [SerializeField] private PlayerWallet playerWallet;

    private void Awake()
    {
        _anim = GetComponent<Animator>();
    }

    private void Start()
    {
        
    }

    public void OnSceneLoaded()
    {
        InputManager.Instance.XRLeftControllerPrimaryButton_Event += this.ToggleShoppingOrderList;
    }

    public async void ToggleShoppingOrderList()
    {
        if(!_controlPositive) return;

        Debug.Log("ToggleShoppingOrderList");

        _controlPositive = false;
        await _shoppingOrderView.ToggleShoppingOrderList();
        _controlPositive = true;
    }

    public void Checkout(CheckoutMachine checkoutMachine)
    {
        List<CheckoutProductionRow> checkoutList = checkoutMachine.GetCheckoutList();

        if(playerWallet.PayMoney(checkoutMachine.CheckoutSum))
        {
            Debug.Log("결제완료");

            if (ShoppingOrderMissionClearCheck(checkoutList, out var missing))
            {
                Debug.Log("게임 클리어");
                GameManager.Instance.GameSceneUI.ShowClearPanel();
            }
            else
            {
                var parts = new List<string>(missing.Count);
                foreach (var (group, shortage) in missing) parts.Add($"{group} x{shortage}");
                Debug.Log($"장보기 목록 미충족 — 부족: {string.Join(", ", parts)}");
            }
        }
        else
        {
            Debug.Log("예산 부족으로 결제 불가");
        }
    }

    //계산한 품목이 장보기 목록을 모두 충족하는지 검사 (더 많은 건 허용)
    //missing: 부족한 ProductGroup과 부족 수량 목록
    private bool ShoppingOrderMissionClearCheck(List<CheckoutProductionRow> checkoutList, out List<(ProductGroup group, int shortage)> missing)
    {
        missing = new List<(ProductGroup, int)>();

        ShoppingOrderList orderList = _shoppingOrderView != null ? _shoppingOrderView.OrderList : null;
        if (orderList == null) return true;

        //구매한 품목을 ProductGroup 기준으로 집계
        var boughtByGroup = new Dictionary<ProductGroup, int>();
        foreach (var row in checkoutList)
        {
            if (row.Item == null) continue;
            boughtByGroup.TryGetValue(row.Item.ProductGroup, out int count);
            boughtByGroup[row.Item.ProductGroup] = count + row.Quantity;
        }

        //목록의 각 항목을 전부 확인해서 부족분 수집
        foreach (var entry in orderList.Entries)
        {
            boughtByGroup.TryGetValue(entry.ProductGroup, out int count);
            int shortage = entry.RequiredQuantity - count;
            if (shortage > 0) missing.Add((entry.ProductGroup, shortage));
        }

        return missing.Count == 0;
    }
}