using Nonemm.Contests;
using Nonemm.Contests.Rules;
using Nonemm.Core;
using Nonemm.Core.Calls;
using Nonemm.Core.Country;
using Nonemm.Storage;

namespace Nonemm.Session.Tests;

public class RadioPositionTests
{
    private const string Countries = """
        Germany:                  14:  28:  EU:   51.00:  -10.00:   -1.0:  DL:
            DL,DK,DJ;
        Japan:                    25:  45:  AS:   36.40: -138.38:   -9.0:  JA:
            JA,JH,JR;
        """;

    private static readonly StationInfo Me = new()
    {
        Callsign = "DL1ABC",
        CqZone = 14,
        ItuZone = 28,
        Continent = "EU",
        CountryPrefix = "DL",
    };

    private static RadioPosition Session(Contest? contest = null) =>
        new(Shared(new FakeLogStore(), contest));

    private static ContestSession Shared(FakeLogStore store, Contest? contest = null)
    {
        ContestInstance instance = store.AddContest(new ContestInstance
        {
            ContestNumber = 0,
            ContestName = "CQWW",
        });
        return new ContestSession(
            store,
            contest ?? new CqWorldWide(ModeCategory.Cw),
            instance,
            Me,
            CountryFile.Parse(Countries));
    }

    private static void Type(RadioPosition session, string call, string zone)
    {
        session.Entry.Call = call;
        session.Entry.Set(ExchangeSlot.ReceivedReport, "599");
        session.Entry.Set(ExchangeSlot.Zone, zone);
    }

    [Fact]
    public void LoggingAContactPutsItInTheLogAndClearsTheEntry()
    {
        RadioPosition session = Session();
        Type(session, "JA1XYZ", "25");
        Qso logged = session.LogContact();

        Assert.Equal("JA1XYZ", logged.Call.Text);
        Assert.Equal(25, logged.Zone);
        Assert.Equal(3, logged.Points);
        Assert.Equal("", session.Entry.Call);
        Assert.Single(session.Log.Qsos);
    }

    [Fact]
    public void CountryAndPrefixAreFilledInFromTheCountryFile()
    {
        RadioPosition session = Session();
        Type(session, "JA1XYZ", "25");
        Qso logged = session.LogContact();

        Assert.Equal("JA", logged.CountryPrefix);
        Assert.Equal("AS", logged.Continent);
        Assert.Equal("JA1", logged.WpxPrefix);
    }

    [Fact]
    public void AnIncompleteExchangeIsNotLogged()
    {
        RadioPosition session = Session();
        session.Entry.Call = "JA1XYZ";
        Assert.Throws<InvalidOperationException>(() => session.LogContact());
    }

    [Fact]
    public void TheSameStationOnTheSameBandReadsAsADupe()
    {
        RadioPosition session = Session();
        Type(session, "JA1XYZ", "25");
        session.LogContact();
        Type(session, "JA1XYZ", "25");
        Assert.True(session.Verdict()?.IsDupe);
    }

    [Fact]
    public void MovingBandClearsTheDupe()
    {
        RadioPosition session = Session();
        Type(session, "JA1XYZ", "25");
        session.LogContact();
        session.Tune(Frequency.FromKilohertz(7_025));
        Type(session, "JA1XYZ", "25");
        Assert.False(session.Verdict()?.IsDupe);
    }

    [Fact]
    public void SerialNumbersCountUp()
    {
        RadioPosition session = Session(new CqWpx(ModeCategory.Cw));
        Assert.Equal(1, session.SentNumber);
        session.Entry.Call = "JA1XYZ";
        session.Entry.Set(ExchangeSlot.ReceivedReport, "599");
        session.Entry.Set(ExchangeSlot.SerialNumber, "12");
        session.LogContact();
        Assert.Equal(2, session.SentNumber);
    }

    [Fact]
    public void SpaceMovesThroughTheBoxesAndBackToTheCall()
    {
        RadioPosition session = Session();
        Assert.Equal(0, session.Entry.Focus);
        session.Entry.Advance();
        Assert.Equal(1, session.Entry.Focus);
        session.Entry.Advance();
        session.Entry.Advance();
        Assert.Equal(0, session.Entry.Focus);
    }

    [Theory]
    [InlineData("14025", 14_025_000)]
    [InlineData("14.025", 14_025_000)]
    [InlineData("7025.5", 7_025_500)]
    public void AFrequencyTypedIntoTheCallBoxIsRecognised(string typed, long hertz)
    {
        RadioPosition session = Session();
        session.Entry.Call = typed;
        Assert.Equal(hertz, session.PendingQsy()?.Hertz);
    }

    [Theory]
    [InlineData("JA1XYZ")]
    [InlineData("12000")]
    public void ACallOrAnOutOfBandNumberIsNotAQsy(string typed)
    {
        RadioPosition session = Session();
        session.Entry.Call = typed;
        Assert.Null(session.PendingQsy());
    }

    [Fact]
    public void AContactDeletedFromTheLogGivesItsMultiplierBack()
    {
        RadioPosition session = Session();
        Type(session, "JA1XYZ", "25");
        Qso first = session.LogContact();
        Type(session, "JA2XYZ", "25");
        session.LogContact();
        Assert.Equal(2, session.Log.Tally.TotalMultipliers);

        session.Session.Delete(first.Id);
        Assert.Single(session.Log.Qsos);
        Assert.Equal(2, session.Log.Tally.TotalMultipliers);
        Assert.True(session.Log.Qsos.Single().IsMultiplier1);
    }

    [Fact]
    public void AContactWorkedSplitRecordsWhereWeTransmitted()
    {
        RadioPosition session = Session();
        session.Tune(
            Frequency.FromKilohertz(14_025),
            Modes.Cw,
            Frequency.FromKilohertz(14_200));
        Type(session, "JA1XYZ", "25");

        Qso logged = session.LogContact();

        Assert.Equal(14_025_000, logged.Frequency.Hertz);
        Assert.Equal(14_200_000, logged.QsxFrequency.Hertz);
    }

    [Fact]
    public void AContactRecordsWhichRadioMadeIt()
    {
        RadioPosition session = new(Shared(new FakeLogStore()), 2);
        Type(session, "JA1XYZ", "25");

        Assert.Equal(2, session.LogContact().RadioNumber);
    }

    /// Tuning without saying anything about split leaves it where it was, so a
    /// frequency typed by hand does not clear what the radio reported.
    [Fact]
    public void TuningWithoutASplitLeavesTheOneAlreadySet()
    {
        RadioPosition session = Session();
        session.Tune(Frequency.FromKilohertz(14_025), null, Frequency.FromKilohertz(14_200));

        session.Tune(Frequency.FromKilohertz(14_030));

        Assert.Equal(14_200_000, session.TransmitFrequency.Hertz);
    }

    [Fact]
    public void EditingAContactRescoresTheLog()
    {
        RadioPosition session = Session();
        Type(session, "JA1XYZ", "25");
        Qso logged = session.LogContact();
        Assert.Equal(3, session.Log.Tally.Points);

        QsoEdit edit = session.Session.Edit(logged.Id, QsoField.Call, "DL2XYZ");

        Assert.True(edit.IsAccepted);
        Assert.Equal("DL2XYZ", session.Log.Qsos.Single().Call.Text);
        Assert.Equal(0, session.Log.Tally.Points);
    }

    [Fact]
    public void ARefusedEditLeavesTheLogAlone()
    {
        RadioPosition session = Session();
        Type(session, "JA1XYZ", "25");
        Qso logged = session.LogContact();

        QsoEdit edit = session.Session.Edit(logged.Id, QsoField.Zone, "41");

        Assert.False(edit.IsAccepted);
        Assert.Equal(25, session.Log.Qsos.Single().Zone);
    }

    /// The other stations need the call and time the contact had before, because
    /// that is how they find their own copy of it.
    [Fact]
    public void AnEditReportsWhatTheContactUsedToBe()
    {
        RadioPosition session = Session();
        Type(session, "JA1XYZ", "25");
        Qso logged = session.LogContact();
        QsoChange? change = null;
        session.Session.Edited += (_, c) => change = c;

        session.Session.Edit(logged.Id, QsoField.Call, "JA2XYZ");

        Assert.Equal("JA1XYZ", change?.OldCall);
        Assert.Equal(logged.TimestampUtc, change?.OldTimestampUtc);
        Assert.Equal("JA2XYZ", change?.Qso.Call.Text);
    }

    /// The country file gets a call wrong now and then. Correcting the country
    /// by hand has to change the score, or the correction is decoration.
    [Fact]
    public void CorrectingTheCountryChangesTheScore()
    {
        RadioPosition session = Session();
        Type(session, "JA1XYZ", "25");
        Qso logged = session.LogContact();
        Assert.Equal(3, session.Log.Tally.Points);

        session.Session.Edit(logged.Id, QsoField.CountryPrefix, "DL");

        Assert.Equal(0, session.Log.Tally.Points);
    }

    [Fact]
    public void ADeleteReportsTheContactThatWent()
    {
        RadioPosition session = Session();
        Type(session, "JA1XYZ", "25");
        Qso logged = session.LogContact();
        Qso? gone = null;
        session.Session.Deleted += (_, q) => gone = q;

        session.Session.Delete(logged.Id);

        Assert.Equal("JA1XYZ", gone?.Call.Text);
    }

    [Fact]
    public void StoredContactsAreReadBackWhenTheSessionStarts()
    {
        FakeLogStore store = new();
        RadioPosition first = new(Shared(store));
        Type(first, "JA1XYZ", "25");
        first.LogContact();

        RadioPosition second = new(new ContestSession(
            store,
            new CqWorldWide(ModeCategory.Cw),
            first.Instance,
            Me,
            CountryFile.Parse(Countries)));
        Assert.Single(second.Log.Qsos);
        Assert.Equal(3, second.Log.Tally.Points);
    }

    private static RadioPosition WithHistory(Contest contest, string file)
    {
        FakeLogStore store = new();
        ContestInstance instance = store.AddContest(new ContestInstance
        {
            ContestNumber = 0,
            ContestName = contest.Name,
        });
        return new RadioPosition(new ContestSession(
            store,
            contest,
            instance,
            Me,
            CountryFile.Parse(Countries),
            CallHistory.Parse(file)));
    }

    [Fact]
    public void TheCallHistoryFillsTheExchangeIn()
    {
        RadioPosition session = WithHistory(
            new Sweepstakes(ModeCategory.Cw),
            "!!Order!!,Call,Sect,CK\nW3LPL,MDC,56");
        session.Entry.Call = "W3LPL";

        Assert.True(session.FillFromHistory());
        Assert.Equal("MDC", session.Entry.ValueOf(ExchangeSlot.Section));
        Assert.Equal("56", session.Entry.ValueOf(ExchangeSlot.Check));
    }

    /// What the other station actually sends beats what was published, so a box
    /// with something in it is left alone.
    [Fact]
    public void WhatIsAlreadyTypedIsNotOverwritten()
    {
        RadioPosition session = WithHistory(
            new Sweepstakes(ModeCategory.Cw),
            "!!Order!!,Call,Sect\nW3LPL,MDC");
        session.Entry.Call = "W3LPL";
        session.Entry.Set(ExchangeSlot.Section, "EPA");

        session.FillFromHistory();

        Assert.Equal("EPA", session.Entry.ValueOf(ExchangeSlot.Section));
    }

    [Fact]
    public void ACallTheHistoryDoesNotHoldFillsNothing()
    {
        RadioPosition session = WithHistory(
            new Sweepstakes(ModeCategory.Cw),
            "!!Order!!,Call,Sect\nW3LPL,MDC");
        session.Entry.Call = "JA1XYZ";

        Assert.False(session.FillFromHistory());
        Assert.Equal("", session.Entry.ValueOf(ExchangeSlot.Section));
    }

    /// CQ WW exchanges the CQ zone, so the CQ zone column is the one to use.
    [Fact]
    public void TheZoneComesFromTheColumnTheContestAsksFor()
    {
        RadioPosition session = WithHistory(
            new CqWorldWide(ModeCategory.Cw),
            "!!Order!!,Call,CqZone,ITUZone\nJA1XYZ,25,45");
        session.Entry.Call = "JA1XYZ";

        session.FillFromHistory();

        Assert.Equal("25", session.Entry.ValueOf(ExchangeSlot.Zone));
    }

    /// A file for a section contest often carries the state instead.
    [Fact]
    public void TheStateFillsASectionWhenTheFileHasNoSection()
    {
        RadioPosition session = WithHistory(
            new Sweepstakes(ModeCategory.Cw),
            "!!Order!!,Call,Sect,State\nK1TTT,,CT");
        session.Entry.Call = "K1TTT";

        session.FillFromHistory();

        Assert.Equal("CT", session.Entry.ValueOf(ExchangeSlot.Section));
    }

    [Fact]
    public void TheNameAndCommentBoxesReachTheLog()
    {
        RadioPosition session = Session();
        session.Entry.Call = "JA1XYZ";
        session.Entry.Set(ExchangeSlot.ReceivedReport, "599");
        session.Entry.Set(ExchangeSlot.Zone, "25");
        session.OtherName = "Ken";
        session.Comment = "up 2";

        Qso logged = session.LogContact();

        Assert.Equal("Ken", logged.Name);
        Assert.Equal("up 2", logged.Comment);
        Assert.Equal("", session.OtherName);
        Assert.Equal("", session.Comment);
    }

    [Fact]
    public void WipingClearsTheNameAndTheComment()
    {
        RadioPosition session = Session();
        session.OtherName = "Ken";
        session.Comment = "up 2";

        session.Wipe();

        Assert.Equal("", session.OtherName);
        Assert.Equal("", session.Comment);
    }
}