using Microsoft.AspNetCore.Mvc;
using RhSolutions.SkuParser.Models;
using RhSolutions.SkuParser.Services;

namespace RhSolutions.SkuParser.Controllers;

[ApiController]
[Route("/api/[controller]")]
public class ProductsController : ControllerBase
{
	private IServiceProvider _provider;
	private Dictionary<Product, double> _result;
	public ProductsController(IServiceProvider provider)
	{
		_provider = provider;
		_result = new();
	}

	[HttpPost]
	public async Task<IActionResult> PostFiles()
	{
		IFormFileCollection files = Request.Form.Files;
		try
		{
			foreach (var file in files)
			{
				ISkuParser parser = _provider.GetRequiredKeyedService<ISkuParser>(file.ContentType);
				IEnumerable<ProductQuantity> productQuantities = await parser.ParseProducts(file);
				foreach (ProductQuantity pq in productQuantities)
				{
					if (_result.ContainsKey(pq.Product))
					{
						_result[pq.Product] += pq.Quantity;
					}
					else
					{
						_result.Add(pq.Product, pq.Quantity);
					}
				}
			}
		}
		catch (Exception ex)
		{
			return BadRequest(error: $"{ex.Message}\n\n{ex.Source}\n{ex.StackTrace}");
		}
		return new JsonResult(_result.Select(x => new { Sku = x.Key.ToString(), Quantity = x.Value }));
	}
}