using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using OneForMe.Data;
using OneForMe.Models;

namespace OneForMe.Controllers;

[Authorize]
public class OrderController : Controller
{
    private readonly ApplicationDbContext _context;

    public OrderController(ApplicationDbContext context)
    {
        _context = context;
    }

    // GET: Order/Create
    public IActionResult Create()
    {
        return View();
    }

    // POST: Order/Create
    [HttpPost]
    public async Task<IActionResult> Create(Order order, string[] itemNames, decimal[] itemPrices)
    {
        if (!ModelState.IsValid)
            return View();

        order.OrderCode = GenerateOrderCode();
        order.CreatorName = User.Identity?.Name ?? "Unknown";
        
        _context.Orders.Add(order);
        await _context.SaveChangesAsync();

        // Add menu items
        for (int i = 0; i < itemNames.Length; i++)
        {
            if (!string.IsNullOrEmpty(itemNames[i]) && itemPrices[i] > 0)
            {
                _context.MenuItems.Add(new MenuItem
                {
                    OrderId = order.Id,
                    Name = itemNames[i],
                    Price = itemPrices[i]
                });
            }
        }
        await _context.SaveChangesAsync();

        return RedirectToAction("Details", new { code = order.OrderCode });
    }

    // GET: Order/Join
    public async Task<IActionResult> Join(string code)
    {
        var order = await _context.Orders
            .Include(o => o.MenuItems)
            .Include(o => o.OrderItems)
            .FirstOrDefaultAsync(o => o.OrderCode == code);

        if (order == null)
            return NotFound("Order not found");

        if (order.IsClosed)
            return BadRequest("This order is closed");

        return View(order);
    }

    // POST: Order/AddItem
    [HttpPost]
    public async Task<IActionResult> AddItem(int orderId, int menuItemId, int quantity, string participantName, string? participantEmail)
    {
        var order = await _context.Orders.FindAsync(orderId);
        if (order == null || order.IsClosed)
            return BadRequest("Order not found or is closed");

        var menuItem = await _context.MenuItems.FindAsync(menuItemId);
        if (menuItem == null)
            return BadRequest("Menu item not found");

        var orderItem = new OrderItem
        {
            OrderId = orderId,
            MenuItemId = menuItemId,
            Quantity = quantity,
            ParticipantName = participantName,
            ParticipantEmail = participantEmail
        };

        _context.OrderItems.Add(orderItem);
        await _context.SaveChangesAsync();

        return RedirectToAction("Join", new { code = order.OrderCode });
    }

    // GET: Order/Details/{code}
    public async Task<IActionResult> Details(string code)
    {
        var order = await _context.Orders
            .Include(o => o.MenuItems)
            .Include(o => o.OrderItems)
            .FirstOrDefaultAsync(o => o.OrderCode == code);

        if (order == null)
            return NotFound();

        return View(order);
    }

    private string GenerateOrderCode()
    {
        return Guid.NewGuid().ToString().Substring(0, 8).ToUpper();
    }
}