using System.Linq;
using System.Text;
using EDJournal;

namespace EliteBGS.BGS.LogGenerator {
    public class CargoSoldFormatter : LogFormatter {
        public string GenerateLog(Objective objective) {
            StringBuilder builder = new StringBuilder();
            SellCargo[] sold = objective.LogEntries
                                .OfType<SellCargo>()
                                .Where(x => x.IsEnabled)
                                .ToArray()
                                ;

            if (sold == null || sold.Length <= 0) {
                return "";
            }


            // This groups everything together by cargo sold, and then by market sold to.
            //  Dictionary<string Cargo, Dictionary<string Market, { Market, Amount, Profit }> >
            var entries = sold.GroupBy(x => x.Cargo,
                                       (key, cargos) => new {
                                           Cargo = key,
                                           Markets = cargos.GroupBy(y => y.Market,
                                                               (market, markets) => new {
                                                                   Market = market,
                                                                   Amount = markets.Sum(x => x.Amount),
                                                                   Profit = markets.Sum(x => x.Profit)
                                                               })
                                       }
                                       )
                              ;

            foreach (var cargo in entries) {
                foreach (var market in cargo.Markets) {
                    builder.AppendFormat("Sold {0} {1} to the {2}",
                            market.Amount,
                            cargo.Cargo,
                            market.Market
                        );

                    if (market.Profit != 0) {
                        builder.AppendFormat(" ({0} {1})",
                            Credits.FormatCredits(market.Profit),
                            market.Profit < 0 ? "loss" : "profit"
                            );
                    }

                    builder.Append("\n");
                }
            }

            builder.AppendFormat("\n");

            return builder.ToString();
        }
    }
}