using MidrandBookshop.Services.ShoppingCart;
using MidrandBookshop.Services.ShoppingCart.Models;

namespace MidrandBookshop.Components.Pages;

public partial class Checkout(CartService cartService)
{
    [Inject]
    private AuthenticationStateProvider AuthStateProvider { get; set; } = default!;

    private Services.ShoppingCart.Models.Cart ShoppingCart => cartService.ShoppingCart;

    private AuthenticationState? AuthState { get; set; }
    private System.Security.Claims.ClaimsPrincipal? User { get; set; }
    private bool IsAuthenticated => User?.Identity?.IsAuthenticated ?? false;

    private decimal ShippingCost = 0;
    private bool IsSameAddress = true;

    private decimal OrderTotalAmount => ShoppingCart.TotalAmount + ShoppingCart.TotalVat + ShippingCost;

    protected override async Task OnInitializedAsync()
    {
        AuthState = await AuthStateProvider.GetAuthenticationStateAsync();
        User = AuthState!.User;

        Navigation.LocationChanged += OnLocationChanged;
        cartService.OnCartChanged += CartService_OnCartChanged;
    }

    private async void CartService_OnCartChanged() => await InvokeAsync(StateHasChanged);

    private void OnLocationChanged(object? sender, LocationChangedEventArgs e) => StateHasChanged();

    private async void ChangeQuantity(CartItem item, int delta)
    {
        var peekQuantity = item.Quantity + delta;

        if (peekQuantity < 1) return;

        cartService.UpdateQuantity(item.Price!.Id, delta);

        await cartService.SaveCartToStorageAsync();
    }

    private async void RemoveFromCart(CartItem item)
    {
        cartService.RemoveOneItem(item.Price!.Id);

        await cartService.SaveCartToStorageAsync();
    }

    private void CompletePurchase(MouseEventArgs args) => Navigation.NavigateTo("/payment-confirmation");
}