using PartSource.Automation.Jobs.Interfaces;
using PartSource.Automation.Models;
using PartSource.Data;
using PartSource.Data.Models;
using Ratermania.Shopify;
using Ratermania.Shopify.Resources;
using Ratermania.Shopify.Resources.Enums;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace PartSource.Automation.Jobs
{
	public class UpdatePricing : IAutomationJob
	{
		private readonly PartSourceContext _partSourceContext;
		private readonly ShopifyClient _shopifyClient;

		public UpdatePricing(PartSourceContext partSourceContext, ShopifyClient shopifyClient)
		{
			_partSourceContext = partSourceContext;
			_shopifyClient = shopifyClient;

		}

		public async Task<AutomationJobResult> Run()
		{
			IEnumerable<Product> products = null;
			int updateCount = 0;

			try
			{
				products = await _shopifyClient.Products.Get();
			}

			catch (Exception ex)
			{
				// TODO: Logging
				return new AutomationJobResult
				{
					Message = "Failed to get products from Shopify",
					IsSuccess = false
				};
			}

			while (products != null && products.Any())
			{
				foreach (Product product in products)
				{
					if (product.Variants.Length > 0)
					{
						Variant variant = product.Variants[0];
						PartPrice partPrice = _partSourceContext.PartPrices.Where(p => p.SKU == variant.Sku).FirstOrDefault();

						if (partPrice == null || !partPrice.Your_Price.HasValue || !partPrice.Compare_Price.HasValue)
						{
							continue;
						}

						try
						{
							if (product.Variants[0].Price != partPrice.Your_Price.Value || product.Variants[0].CompareAtPrice != partPrice.Compare_Price.Value)
							{
								product.Variants[0].Price = partPrice.Your_Price.Value;
								product.Variants[0].CompareAtPrice = partPrice.Compare_Price.Value;

								product.PublishedAt = partPrice.Active.ToUpperInvariant() == "Y" ? DateTime.Now : default;

								Metafield metafield = new Metafield
								{
									Namespace = "Pricing",
									Key = "CorePrice",
									Value = partPrice.Core_Price.HasValue ? partPrice.Core_Price.Value.ToString() : "0.00",
									ValueType = "string",
									OwnerResource = "product",
									OwnerId = product.Id
								};

								try
								{
									await _shopifyClient.Metafields.Add(metafield);
									await _shopifyClient.Products.Update(product);
									
									updateCount++;
								}

								catch (Exception ex)
								{

								}
							}
						}

						catch (Exception ex)
						{
							;
						}
					}
				}

				_partSourceContext.SaveChanges();

				try
				{
					products = await _shopifyClient.Products.GetNext();
				}

				catch (Exception ex)
				{
					products = await _shopifyClient.Products.GetPrevious();
				}
			}

			return new AutomationJobResult
			{
				Message = $"The nightly pricing update has completed.  {updateCount} products were updated.",
				IsSuccess = true
			};
		}
	}
}