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

namespace Nonemm.Session.Tests;

public class AvailableStationsTests
{
    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;
        United States:            05:  08:  NA:   37.53:   91.67:    5.0:  K:
            K,W,N;
        """;

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

    private static readonly Frequency On20 = Frequency.FromKilohertz(14_030);

    private static (OperatingPosition Position, Bandmap Bandmap, AvailableStations Available) Station(
        Contest? contest = null,
        CallHistory? history = null)
    {
        FakeLogStore store = new();
        ContestInstance instance = store.AddContest(new ContestInstance
        {
            ContestNumber = 0,
            ContestName = "CQWW",
        });
        ContestSession session = new(
            store,
            contest ?? new CqWorldWide(ModeCategory.Cw),
            instance,
            Me,
            CountryFile.Parse(Countries),
            history);
        OperatingPosition position = new(session);
        Bandmap bandmap = new();
        return (position, bandmap, new AvailableStations(position, bandmap));
    }

    private static Spot At(string call, Frequency where) =>
        new(Callsign.Parse(call), where, DateTime.UtcNow, SpotSource.Cluster, "OK1TEST");

    private static void Work(OperatingPosition position, string call, string zone, Frequency where)
    {
        position.Tune(where);
        position.Entry.Call = call;
        position.Entry.Set(ExchangeSlot.ReceivedReport, "599");
        position.Entry.Set(ExchangeSlot.Zone, zone);
        position.LogContact();
    }

    /// A mark saying a frequency is busy is not a station to work.
    [Fact]
    public void AMarkIsNotOffered()
    {
        (_, Bandmap bandmap, AvailableStations available) = Station();
        bandmap.Add(Spot.Mark(On20, DateTime.UtcNow));

        Assert.Empty(available.All());
    }

    [Fact]
    public void ASpottedStationThatIsANewCountryIsAMultiplier()
    {
        (_, Bandmap bandmap, AvailableStations available) = Station();
        bandmap.Add(At("JA1XYZ", On20));

        AvailableStation station = Assert.Single(available.All());
        Assert.True(station.IsMultiplier);
        Assert.Equal(Bands.Band20M, station.Band);
        Assert.Equal("JA", station.MultiplierText);
    }

    /// CQ WW counts the zone the station sends, not the one the country file
    /// guesses, and a spot carries no exchange. So the zone shows only where
    /// the call history file published it.
    [Fact]
    public void TheCallHistoryZoneBringsInTheZoneMultiplier()
    {
        CallHistory history = CallHistory.Parse("""
            !!Order!!,Call,CQZone
            JA1XYZ,25
            """);
        (_, Bandmap bandmap, AvailableStations available) = Station(history: history);
        bandmap.Add(At("JA1XYZ", On20));

        AvailableStation station = Assert.Single(available.All());
        Assert.Equal("25, JA", station.MultiplierText);
    }

    [Fact]
    public void AStationAlreadyWorkedOnThatBandIsLeftOut()
    {
        (OperatingPosition position, Bandmap bandmap, AvailableStations available) = Station();
        Work(position, "JA1XYZ", "25", On20);
        bandmap.Add(At("JA1XYZ", On20));

        Assert.Empty(available.All());
    }

    [Fact]
    public void TheSameStationOnAnotherBandIsStillWorthWorking()
    {
        (OperatingPosition position, Bandmap bandmap, AvailableStations available) = Station();
        Work(position, "JA1XYZ", "25", On20);
        bandmap.Add(At("JA1XYZ", Frequency.FromKilohertz(7_030)));

        AvailableStation station = Assert.Single(available.All());
        Assert.Equal(Bands.Band40M, station.Band);
        Assert.True(station.IsMultiplier);
    }

    [Fact]
    public void AStationThatBringsNoMultiplierIsStillOfferedForItsPoints()
    {
        (OperatingPosition position, Bandmap bandmap, AvailableStations available) = Station();
        Work(position, "JA1XYZ", "25", On20);
        bandmap.Add(At("JA2ABC", On20));

        AvailableStation station = Assert.Single(available.All());
        Assert.False(station.IsMultiplier);
        Assert.True(station.Verdict.Points > 0);
    }

    [Fact]
    public void MultipliersComeFirst()
    {
        (OperatingPosition position, Bandmap bandmap, AvailableStations available) = Station();
        Work(position, "JA1XYZ", "25", On20);
        bandmap.Add(At("JA2ABC", Frequency.FromKilohertz(14_010)));
        bandmap.Add(At("W1AW", Frequency.FromKilohertz(14_040)));

        Assert.Equal(
            ["W1AW", "JA2ABC"],
            available.All().Select(s => s.Spot.Call.Text).ToList());
    }

    /// A spot carries no exchange, so a section contest can only judge a
    /// spotted station where the call history file says what it sends.
    [Fact]
    public void TheCallHistoryFillsTheExchangeOfASpottedStation()
    {
        CallHistory history = CallHistory.Parse("""
            !!Order!!,Call,Sect
            W1AW,CT
            """);
        (_, Bandmap bandmap, AvailableStations available) =
            Station(new Sweepstakes(ModeCategory.Cw), history);
        bandmap.Add(At("W1AW", Frequency.FromKilohertz(14_080)));

        AvailableStation station = Assert.Single(available.All());
        Assert.True(station.IsMultiplier);
        Assert.Equal("CT", station.MultiplierText);
    }

    [Fact]
    public void WithNoCallHistoryASpottedStationOfASectionContestIsJustPoints()
    {
        (_, Bandmap bandmap, AvailableStations available) = Station(new Sweepstakes(ModeCategory.Cw));
        bandmap.Add(At("W1AW", Frequency.FromKilohertz(14_080)));

        AvailableStation station = Assert.Single(available.All());
        Assert.False(station.IsMultiplier);
    }
}