using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.CommandLine.DragonFruit;
using CsvHelper;
using CsvHelper.Configuration.Attributes;

namespace BunyMuny {
	class Program {
		/// <summary>
		/// BunyMuny parses the CSV output of various bank statement listings and converts it to something more human readable with nice visualisations.
		/// </summary>
		/// <param name="file">The CSV file to read</param>
		/// <param name="rules">The JSON file to use for rules when parsing statement descriptions</param>
		/// <returns></returns>
		static int Main(string file = "test.csv", string rules = "rules.json") {
			Bank bank = Bank.ME;
			var statements = new List<Statement>();

			using (var sr = new StreamReader(file)) {
				using (var csv = new CsvReader(sr, CultureInfo.InvariantCulture)) {
					csv.Read();
					csv.ReadHeader();
					// get the first line of the CSV file (the header) as a string
					string header = csv.Parser.Context.RawRecord;
					if (header == null) {
						Console.WriteLine("File is empty 0uo");
						return 1;
					}
					else if (header == "Date,Description,Debits and credits,Balance") {
						bank = Bank.ME;
					}
					else if (header == "Whatever NAB uses I guess") {
						bank = Bank.NAB;
					}

					while (csv.Read()) {
						switch (bank) {
							case Bank.ME:
								double value = double.Parse(csv.GetField("Debits and credits").TrimStart().Replace("$", ""));
								statements.Add(new Statement() {
									Date = DateTime.ParseExact(csv.GetField("Date"), "dd/MM/yyyy", CultureInfo.InvariantCulture),
									Description = csv.GetField("Description"),
									Category = "Unknown",
									Value = value
								});
								break;

							default:
								Console.WriteLine(":(");
								return 1;
						}
					}

					foreach (var statement in statements) {
						Console.WriteLine(statement);
					}
				}
			}

			return 0;
		}
	}
}