using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using PartSource.Automation.Services;
using PartSource.Data.Contexts;
using PartSource.Data.Models;
using Ratermania.Automation.Interfaces;
using Ratermania.Shopify;
using Ratermania.Shopify.Resources;

namespace PartSource.Automation.Jobs
{
    public class UpdateFitment : IAutomationJob
    {
        private readonly ILogger<UpdateFitment> _logger;
        private readonly ShopifyClient _shopifyClient;
        private readonly PartSourceContext _partSourceContext;
        private readonly FitmentContext _fitmentContext;
        private readonly VehicleFitmentService _vehicleFitmentService;

        public UpdateFitment(ILogger<UpdateFitment> logger, PartSourceContext partSourceContext, FitmentContext fitmentContext, ShopifyClient shopifyClient, VehicleFitmentService vehicleFitmentService)
        {
            _logger = logger;
            _partSourceContext = partSourceContext;
            _fitmentContext = fitmentContext;
            _shopifyClient = shopifyClient;
            _vehicleFitmentService = vehicleFitmentService;
        }

        public async Task Run(CancellationToken token, params string[] arguments)
        {

            IEnumerable<Product> products = null;

            IList<string> partTypes = new List<string>
            {
                "CA115-SC118-FL11803_Custom Lighting Accessories",
                "CA117-SC141-FL14106_Jeep Accessories",
                "CA117-SC141-FL14134_Truck Running Board and Steps",
                "CA117-SC141-FL14199_Bumpers, Bull Bars & Brush Guards",
                "CA117-SC157-FL15704_Headache Rack Frames",
                "CA117-SC158-FL15802_Salters and Plow Accessories",
                "CA117-SC699-FL69902_Crossover Boxes",
                "CA117-SC699-FL69903_Specialty Boxes",
                "CA117-SC699-FL69904_Transfer Tanks",
                "CA135-SC176-FL17601_Trailer Lighting, Stop, Turn, Tail",
                "CA135-SC186-FL18607_Roof Racks",
                "CA135-SC186-FL18608_Bike Carriers",
                "CA135-SC186-FL18609_Cargo Accessories",
                "CA135-SC186-FL18610_Cargo Carriers",
                "CA135-SC186-FL18611_Watersport Carriers",
                "CA135-SC192-FL19201_Class 1 Hitches",
                "CA135-SC192-FL19202_Class 2 Hitches",
                "CA135-SC192-FL19203_Class 3 Hitches",
                "CA135-SC192-FL19204_Towing, Heavy Duty",
                "CA135-SC192-FL19205_Towing Electrical, Vehicle Specific",
                "CA135-SC192-FL19206_Trailer Parts & Accessories",
                "CA135-SC192-FL19207_Trailer Winches, Jacks & Couplers",
                "CA135-SC192-FL19208_Class 5 Hitches",
                "CA135-SC192-FL19221_Towing Electrical, Connectors & Adapters",
                "CA135-SC192-FL19230_Towing Electrical, Controls & Converters",
                "CA135-SC192-FL19235_Towing Electrical, Harnesses",
                "CA135-SC192-FL19240_Towing Security, Non-Locking",
                "CA135-SC192-FL19245_Towing Class V",
                "CA135-SC192-FL19280_Towing Balls",
                "CA135-SC192-FL19281_Towing Ball Mounts",
                "CA135-SC192-FL19282_Towing Security, Locking",
                "CA135-SC192-FL19283_Towing Kits & Acc"
            };

            foreach (string partType in partTypes)
            {
                try
                {
                    products = await _shopifyClient.Products.Get(new Dictionary<string, object> { { "limit", 250 }, { "product_type", partType } });
                    //products = new List<Product>
                    //{
                    //    await _shopifyClient.Products.GetById(4388919574575)
                    //};
                }

                catch (Exception ex)
                {
                    _logger.LogError("Failed to get products from Shopify", ex);
                    throw;
                }

                int i = 1;

                while (products != null && products.Any())
                {
                    foreach (Product product in products)
                    {
                        ImportData importData = null;

                        try
                        {
                            IEnumerable<Metafield> metafields = await _shopifyClient.Metafields.Get(new Dictionary<string, object> { { "metafield[owner_id]", product.Id }, { "metafield[owner_resource]", "product" } });
                            importData = new ImportData
                            {
                                LineCode = metafields.FirstOrDefault(m => m.Key == "custom_label_0")?.Value ?? string.Empty,
                                PartNumber = metafields.FirstOrDefault(m => m.Key == "custom_label_1")?.Value ?? string.Empty,
                                VariantSku = product.Variants[0].Sku  // They know we can't do fitment for variants
                            };

                            bool isFitment = false;
                            string bodyHtml = product.BodyHtml.Substring(0, product.BodyHtml.IndexOf("</ul>") + "</ul>".Length);

                            IList<Vehicle> vehicles = _vehicleFitmentService.GetVehiclesForPart(importData.PartNumber, importData.LineCode);
                            IList<int> vehicleIdFitment = _vehicleFitmentService.GetVehicleIdFitment(vehicles);

                            if (!vehicleIdFitment.Any())
                            {
                                Console.WriteLine($"No fitment data for SKU {importData.VariantSku}");
                                continue;
                            }

                            if (vehicleIdFitment.Count > 0)
                            {
                                string vehicleIdString = string.Join(',', vehicleIdFitment.Select(j => $"v{j}"));

                                bodyHtml += $"<div id=\"vehicleIDs\" style=\"display:none;\">{vehicleIdString}</div>";

                                isFitment = true;

                                string json = JsonConvert.SerializeObject(vehicleIdFitment);
                                if (json.Length < 100000)
                                {
                                    Metafield vehicleMetafield = new Metafield
                                    {
                                        Namespace = "fitment",
                                        Key = "ids",
                                        Value = json,
                                        Type = "json_string",
                                        OwnerResource = "product",
                                        OwnerId = product.Id
                                    };

                                    await _shopifyClient.Metafields.Add(vehicleMetafield);
                                }

                                else
                                {
                                    _logger.LogWarning($"Vehicle ID fitment data for SKU {importData.VariantSku} is too large for Shopify and cannot be added.");
                                    continue;
                                }
                            }

                            IList<string> ymmFitment = _vehicleFitmentService.GetYmmFitment(vehicles);
                            if (ymmFitment.Count > 0)
                            {
                                isFitment = true;

                                StringBuilder stringBuilder = new StringBuilder();
                                stringBuilder.AppendLine("<table><tr><th colspan=\"2\">This Part Fits</th></tr>");

                                foreach (string fitment in ymmFitment)
                                {
                                    try
                                    {
                                        string[] parts = fitment.Split(' ', 2);

                                        stringBuilder.AppendLine($"<tr><td>{parts[1]}</td><td>{parts[0].Replace("-", ", ")}</td></tr>");
                                    }

                                    catch
                                    {
                                        // This is still a POC at this point.  Oh well...
                                    }
                                }

                                stringBuilder.AppendLine("</table>");

                                bodyHtml += $"<div id=\"seoData\">{stringBuilder.ToString()}</div>";

                                string json = JsonConvert.SerializeObject(ymmFitment);
                                if (json.Length < 100000)
                                {
                                    Metafield ymmMetafield = new Metafield
                                    {
                                        Namespace = "fitment",
                                        Key = "seo",
                                        Value = json,
                                        Type = "json_string",
                                        OwnerResource = "product",
                                        OwnerId = product.Id
                                    };

                                    await _shopifyClient.Metafields.Add(ymmMetafield);
                                }

                                else
                                {
                                    _logger.LogWarning($"Year/make/model fitment data for SKU {importData.VariantSku} is too large for Shopify and cannot be added.");
                                    continue;
                                }
                            }

                            Metafield isFitmentMetafield = new Metafield
                            {
                                Namespace = "Flags",
                                Key = "IsFitment",
                                Value = isFitment.ToString(),
                                Type = "string",
                                OwnerResource = "product",
                                OwnerId = product.Id
                            };

                            await _shopifyClient.Metafields.Add(isFitmentMetafield);

                            //Metafield lineCodeMetafield = new Metafield
                            //{
                            //	Namespace = "google",
                            //	Key = "custom_label_0",
                            //	Value = importData.LineCode,
                            //	Type = "string",
                            //	OwnerResource = "product",
                            //	OwnerId = product.Id
                            //};

                            //await _shopifyClient.Metafields.Add(lineCodeMetafield);

                            //Metafield partNumberMetafield = new Metafield
                            //{
                            //	Namespace = "google",
                            //	Key = "custom_label_1",
                            //	Value = importData.PartNumber,
                            //	Type = "string",
                            //	OwnerResource = "product",
                            //	OwnerId = product.Id
                            //};

                            //await _shopifyClient.Metafields.Add(partNumberMetafield);

                            List<string> tags = new List<string>();

                            for (int j = 0; j < vehicleIdFitment.Count; j += 25)
                            {
                                tags.Add(string.Join('-', vehicleIdFitment.Skip(j).Take(25).Select(j => $"v{j}")));
                            }

                            tags.AddRange(ymmFitment);

                            if (tags.Count > 249)
                            {
                                tags = tags.Take(249).ToList();
                            }

                            string zzzIsFitment = isFitment
                                ? "zzzIsFitment=true"
                                : "zzzIsFitment=false";

                            tags.Add(zzzIsFitment);

                            product.Tags = string.Join(',', tags);
                            product.BodyHtml = bodyHtml;
                            await _shopifyClient.Products.Update(product);

                            importData.IsFitment = isFitment;
                            importData.UpdatedAt = DateTime.Now;
                            importData.UpdateType = "Fitment";
                        }

                        catch (Exception ex)
                        {
                            _logger.LogError($"Failed to updated fitment data for SKU {importData?.VariantSku} - {ex.Message}", ex);
                        }

                    }
                    try
                    {
                        Console.WriteLine(i);

                        _partSourceContext.SaveChanges();
                        products = await _shopifyClient.Products.GetNext();

                        i++;
                    }

                    catch (Exception ex)
                    {
                        _logger.LogWarning(ex, "Failed to get the next set of products.  Retrying");
                        products = await _shopifyClient.Products.GetPrevious();
                    }
                }

                Console.WriteLine($"Finished {partType}");
            }
        }
    }
}