using Nonemm.Core;
using Nonemm.Core.Country;

namespace Nonemm.Contests.Rules;

/// The Mexico RTTY contest. A Mexican station sends its state, everyone else a
/// serial number. A contact with Mexico is worth 4 points, one inside your own
/// country 2, and anything else 3. The multipliers are the countries and the
/// Mexican states, each once per band.
public sealed class MexicoRtty : Contest
{
    public string Name => "XERTTY";

    public string DisplayName => "Mexico RTTY Contest";

    public string CabrilloName => "XE-RTTY";

    public IReadOnlyList<ExchangeField> ExchangeFieldsFor(StationInfo me) => IsMexican(me.CountryPrefix)
        ?
        [
            new ExchangeField("Snt", ExchangeSlot.SentReport, ExchangeFieldKind.Report, IsRequired: false),
            new ExchangeField("Rcv", ExchangeSlot.ReceivedReport, ExchangeFieldKind.Report),
            new ExchangeField("Exch", ExchangeSlot.Exchange1, ExchangeFieldKind.Text) { Width = 3 },
        ]
        :
        [
            new ExchangeField("Snt", ExchangeSlot.SentReport, ExchangeFieldKind.Report, IsRequired: false),
            new ExchangeField("Rcv", ExchangeSlot.ReceivedReport, ExchangeFieldKind.Report),
            new ExchangeField("SentNR", ExchangeSlot.SentNumber, ExchangeFieldKind.Number, IsRequired: false),
            new ExchangeField("Exch", ExchangeSlot.Exchange1, ExchangeFieldKind.Text) { Width = 3 },
        ];

    /// A Mexican station sends a state, which goes in the section column; the
    /// serial everyone else sends stays in the exchange column.
    public Qso FromExchange1(Qso qso, string typed) => qso with
    {
        Section = IsMexican(qso.CountryPrefix) ? typed.Trim().ToUpperInvariant() : "",
    };

    public IReadOnlyList<string> MultiplierNames => ["Countries", "States"];

    public DupeScope DupeScope => DupeScope.PerBand;

    public bool HasSerialNumbers => true;

    public IReadOnlyList<ModeCategory> Modes => [ModeCategory.Digital];

    public string SentExchangeFor(StationInfo me) => IsMexican(me.CountryPrefix) ? me.State : "001";

    public int PointsFor(QsoContext qso) =>
        IsMexican(qso.CountryPrefix) ? 4 : qso.IsSameCountry ? 2 : 3;

    public IReadOnlyList<Multiplier> MultipliersFor(QsoContext qso)
    {
        string band = qso.Band?.Name ?? "";
        List<Multiplier> found = [];
        if (qso.CountryPrefix.Length > 0)
        {
            found.Add(new Multiplier(1, qso.CountryPrefix, band));
        }
        string state = qso.Qso.Section.Trim().ToUpperInvariant();
        if (IsMexican(qso.CountryPrefix) && state.Length > 0)
        {
            found.Add(new Multiplier(2, state, band));
        }
        return found;
    }

    public int TotalScore(ScoreTally tally, ContestEntry entry) =>
        tally.Points * tally.TotalMultipliers;

    public CabrilloExchange CabrilloExchange(Qso qso, StationInfo me, ContestEntry entry) =>
        new(
            [
                new CabrilloField(me.Callsign, 13),
                new CabrilloField(qso.SentReport, 3),
                new CabrilloField(IsMexican(me.CountryPrefix) ? me.State : $"{qso.SentNumber:000}", 6),
            ],
            [
                new CabrilloField(qso.Call.Text, 13),
                new CabrilloField(qso.ReceivedReport, 3),
                new CabrilloField(qso.Section.Length > 0 ? qso.Section : qso.Exchange1, 6),
            ]);

    private static bool IsMexican(string countryPrefix) => countryPrefix == "XE";
}