using MarketPriceLookup.Helpers;
using Microsoft.VisualBasic.FileIO;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace MarketPriceLookup.Common.Helpers
{
    public static class MarketPricesHelper
    {
        private static readonly Dictionary<string, Prices> priceFile = new Dictionary<string, Prices>();

        public static Prices GetItemPrice(string key)
        {
            // parse csv if dictionary is empty
            if (priceFile.Count == 0)
            {
                var workingPath = Directory.GetCurrentDirectory();
                var inputPath = $"{workingPath}//input";
                var filePath = $"{inputPath}//marketPrices.csv";
                DiskHelpers.CreateDirIfDoesntExist(inputPath);

                using (TextFieldParser csvParser = new TextFieldParser(filePath))
                {
                    csvParser.CommentTokens = new string[] { "#" };
                    csvParser.SetDelimiters(new string[] { "," });
                    csvParser.HasFieldsEnclosedInQuotes = true;

                    // Skip the row with the column names
                    csvParser.ReadLine();
                    csvParser.ReadLine();

                    while (!csvParser.EndOfData)
                    {
                        // Read current line fields, pointer moves to the next line.
                        string[] fields = csvParser.ReadFields();
                        //string uid = fields[0];
                        string name = fields[1];
                        int price = int.Parse(fields[2]);
                        int avg24hPrice = int.Parse(fields[3]);
                        int avg7daysPrice = int.Parse(fields[4]);
                        //string trader = fields[5];
                        //int buyBackPrice = int.Parse(fields[6]);
                        string currency = GetCurrencyType(fields[7]);
                        string bsgId = fields[8];
                        int traderPrice = int.Parse(fields[9]);

                        //if (avg7daysPrice == 0)
                        //{
                        //    LoggingHelpers.LogError($"unable to add bad item with price average of 0, ignoring: {bsgId} {name}");
                        //    continue;
                        //}

                        if (priceFile.ContainsKey(bsgId))
                        {
                            //oh no, item already exists in the csv
                            var existingItem = priceFile[bsgId];
                            LoggingHelpers.LogError($"Unable to add item: {bsgId} {name}. existing item: {existingItem.TemplateId} {existingItem.Name}");
                            if (existingItem.Average7DaysPrice != avg7daysPrice)
                            {
                                LoggingHelpers.LogError($"Price diff found: already existing item price: {existingItem.Average7DaysPrice} new item price: {avg7daysPrice}");
                                continue;
                            }
                        }
                        if (!priceFile.ContainsKey(bsgId))
                        {
                            priceFile.Add(bsgId, new Prices
                            {
                                Name = name,
                                Price = price,
                                Average24hPrice = avg24hPrice,
                                Average7DaysPrice = avg7daysPrice,
                                //Trader = trader,
                                //BuyPackPrice = buyBackPrice,
                                Currency = currency,
                                TemplateId = bsgId,
                                TraderPrice = traderPrice,
                            });
                        }
                        
                        LoggingHelpers.LogSuccess($"Adding item: {bsgId} {name}");
                        
                    }
                }
            }

            if (!priceFile.ContainsKey(key))
            {
                return null;
            }

            return priceFile[key];
        }

        private static string GetCurrencyType(string input)
        {
            return input switch
            {
                "₽" => "Rouble",
                "$" => "Dollar",
                "€" => "Euro",
                _ => string.Empty,
            };
        }
    }
}