namespace MidrandBookshop.Components.Pages;

public partial class Account : ComponentBase
{
    [Inject] private AuthenticationStateProvider AuthStateProvider { get; set; } = default!;

    private ClaimsPrincipal? User { get; set; }
    private bool showAddForm = false;
    private AddressItem? editingAddress = null;
    private string newAddressName = "";
    private string newStreetAddress = "";
    private string newCity = "";
    private string newPostalCode = "";
    private bool isBilling, isShipping;

    private List<OrderItem> orderHistory = new()
    {
        // 1. Delivered + Paid (Green Mapping Rules)
        new OrderItem { OrderId = "#MB-2026-8712", ProductId = "mastering-css-isolation", ProductTitle = "Mastering CSS Isolation in Modern .NET Web Applications Architecture", OrderDate = new DateTime(2026, 4, 14), ShippingAddressName = "Midrand Warehouse", Status = "Delivered", PaymentStatus = "Paid", Total = 890.00 },
        
        // 2. Shipped + Paid (Amber Logistics + Green Payment Rules)
        new OrderItem { OrderId = "#MB-2026-9481", ProductId = "introduction-to-blazor", ProductTitle = "Introduction to Blazor WebAssembly Framework Development", OrderDate = new DateTime(2026, 5, 20), ShippingAddressName = "Home Address", Status = "Shipped", PaymentStatus = "Paid", Total = 720.00 },
        
        // 3. Unshipped + Abandoned/Unpaid (Muted Grey / Soft Red Rules — Hides Invoice Button)
        new OrderItem { OrderId = "#MB-2026-1034", ProductId = "csharp-functional-paradigms", ProductTitle = "Advanced Functional Architecture & Monadic Paradigms in Modern C#", OrderDate = new DateTime(2026, 6, 11), ShippingAddressName = "Home Address", Status = "Unshipped", PaymentStatus = "Unpaid", Total = 650.00 }
    };

    private List<AddressItem> savedAddresses = new()
    {
        new AddressItem { Id = 1, Name = "Home Address", Street = "12 Main Road", City = "Midrand", PostalCode = "1685", IsBilling = true, IsShipping = true, IsPrimary = true },
        new AddressItem { Id = 2, Name = "Midrand Warehouse", Street = "Corner of Church & Third Roads", City = "Midrand", PostalCode = "1685", IsBilling = false, IsShipping = false, IsPrimary = false }
    };

    protected override async Task OnInitializedAsync()
    {
        var authState = await AuthStateProvider.GetAuthenticationStateAsync();
        User = authState?.User;
    }

    private void DownloadInvoice(string orderId)
    {
        Navigation.NavigateTo($"/api/invoices/download/{orderId.Replace("#", "")}", forceLoad: true);
    }

    private string GetStatusClass(string status) => status?.ToLower() switch
    {
        "delivered" => "status-delivered", // Green
        "shipped" => "status-shipped",     // Amber
        _ => "status-processing"           // Muted Architectural Dark Grey
    };

    private string GetPaymentStatusClass(string paymentStatus) => paymentStatus?.ToLower() switch
    {
        "paid" => "pay-paid",              // Green
        "refunded" => "pay-refunded",      // Grey
        _ => "pay-pending"                 // Red Alert Tone
    };

    private void EditAddress(AddressItem addr)
    {
        editingAddress = addr;
        showAddForm = false;
        newAddressName = addr.Name;
        newStreetAddress = addr.Street;
        newCity = addr.City;
        newPostalCode = addr.PostalCode;
        isBilling = addr.IsBilling;
        isShipping = addr.IsShipping;
    }

    private void CancelAddressActions()
    {
        showAddForm = false;
        editingAddress = null;
        ClearFormFields();
    }

    private void ClearFormFields()
    {
        newAddressName = "";
        newStreetAddress = "";
        newCity = "";
        newPostalCode = "";
        isBilling = false;
        isShipping = false;
    }

    private void SaveAddress()
    {
        if (string.IsNullOrWhiteSpace(newAddressName) || string.IsNullOrWhiteSpace(newStreetAddress)) return;

        if (editingAddress == null)
        {
            var nextId = savedAddresses.Any() ? savedAddresses.Max(a => a.Id) + 1 : 1;
            var newAddr = new AddressItem
            {
                Id = nextId,
                Name = newAddressName,
                Street = newStreetAddress,
                City = newCity,
                PostalCode = newPostalCode,
                IsBilling = isBilling,
                IsShipping = isShipping,
                IsPrimary = !savedAddresses.Any()
            };
            savedAddresses.Add(newAddr);
        }
        else
        {
            var target = savedAddresses.FirstOrDefault(a => a.Id == editingAddress.Id);
            if (target != null)
            {
                target.Name = newAddressName;
                target.Street = newStreetAddress;
                target.City = newCity;
                target.PostalCode = newPostalCode;
                target.IsBilling = isBilling;
                target.IsShipping = isShipping;
            }
            editingAddress = null;
        }

        showAddForm = false;
        ClearFormFields();
    }

    private void DeleteAddress(AddressItem addr)
    {
        if (editingAddress?.Id == addr.Id) editingAddress = null;
        savedAddresses.Remove(addr);
        if (addr.IsPrimary && savedAddresses.Any()) savedAddresses.First().IsPrimary = true;
    }

    private void SetPrimary(AddressItem target, ChangeEventArgs e)
    {
        var isChecked = (bool)(e.Value ?? false);
        if (isChecked)
        {
            foreach (var addr in savedAddresses) addr.IsPrimary = (addr.Id == target.Id);
        }
        else target.IsPrimary = false;
    }

    private void TriggerLogout()
    {
        Navigation.NavigateTo("/logout", forceLoad: true);
    }

    public class AddressItem
    {
        public int Id { get; set; }
        public string Name { get; set; } = "";
        public string Street { get; set; } = "";
        public string City { get; set; } = "";
        public string PostalCode { get; set; } = "";
        public bool IsBilling { get; set; }
        public bool IsShipping { get; set; }
        public bool IsPrimary { get; set; }
    }

    public class OrderItem
    {
        public string OrderId { get; set; } = "";
        public string ProductId { get; set; } = "";
        public string ProductTitle { get; set; } = "";
        public DateTime OrderDate { get; set; }
        public string ShippingAddressName { get; set; } = "";
        public string Status { get; set; } = "";
        public string PaymentStatus { get; set; } = "Pending";
        public double Total { get; set; }
    }
}