using Nonemm.Core.Calls;

namespace Nonemm.Core.Tests.Calls;

public class CallHistoryTests
{
    [Fact]
    public void AFileWithNoOrderLineIsReadInTheDefaultOrder()
    {
        CallHistory history = CallHistory.Parse(
            "OM5M,Erik,JN88,,,,,,15,,100,15,28,notes");

        CallHistoryEntry? found = history.Find("OM5M");

        Assert.Equal("Erik", found?.Name);
        Assert.Equal("JN88", found?.GridSquare);
        Assert.Equal("15", found?.Exchange1);
        Assert.Equal("100", found?.Power);
        Assert.Equal(15, found?.CqZone);
        Assert.Equal(28, found?.ItuZone);
    }

    [Fact]
    public void AnOrderLineNamesTheColumns()
    {
        CallHistory history = CallHistory.Parse("""
            !!Order!!,Call,Sect,Name
            W3LPL,MDC,Frank
            """);

        Assert.Equal("MDC", history.Find("W3LPL")?.Section);
        Assert.Equal("Frank", history.Find("W3LPL")?.Name);
    }

    [Fact]
    public void CommentsAndBlankLinesArePassedOver()
    {
        CallHistory history = CallHistory.Parse("""
            # a comment
            # another

            !!Order!!,Call,Name
            OM5M,Erik
            """);

        Assert.Equal(1, history.Count);
    }

    /// N1MM takes semicolons in preference to commas, so user text holding a
    /// comma can still be read.
    [Fact]
    public void ALineWithSemicolonsIsSplitOnThose()
    {
        CallHistory history = CallHistory.Parse("""
            !!Order!!;Call;Name;UserText
            OM5M;Erik;works 20m, mostly CW
            """);

        Assert.Equal("Erik", history.Find("OM5M")?.Name);
        Assert.Equal("works 20m, mostly CW", history.Find("OM5M")?.UserText);
    }

    [Fact]
    public void AnUnknownCallIsNotFound() =>
        Assert.Null(CallHistory.Parse("OM5M,Erik").Find("JA1XYZ"));

    [Fact]
    public void TheCallIsMatchedWhateverCaseItIsTypedIn() =>
        Assert.NotNull(CallHistory.Parse("om5m,Erik").Find("OM5M"));

    [Fact]
    public void AGridIsCutToFourCharactersWhenTheFileAsksForIt()
    {
        CallHistory history = CallHistory.Parse("""
            !!FourCharGridSq!!
            !!Order!!,Call,Loc1
            OM5M,JN88TG
            """);

        Assert.Equal("JN88", history.Find("OM5M")?.GridSquare);
    }

    [Fact]
    public void TheSecondGridIsDroppedWhenTheFileAsksForIt()
    {
        CallHistory history = CallHistory.Parse("""
            !!NoLoc2AltGrid!!
            !!Order!!,Call,Loc1,Loc2
            OM5M,JN88,JN99
            """);

        Assert.Equal("", history.Find("OM5M")?.AlternateGridSquare);
    }

    [Fact]
    public void AnEmptySectionIsFilledFromTheStateWhenTheFileAsksForIt()
    {
        CallHistory history = CallHistory.Parse("""
            !!MapStateToSect!!
            !!Order!!,Call,Sect,State
            K1TTT,,CT
            """);

        Assert.Equal("CT", history.Find("K1TTT")?.Section);
    }

    [Fact]
    public void AStateDoesNotOverwriteASectionThatIsThere()
    {
        CallHistory history = CallHistory.Parse("""
            !!MapStateToSect!!
            !!Order!!,Call,Sect,State
            K1TTT,WMA,MA
            """);

        Assert.Equal("WMA", history.Find("K1TTT")?.Section);
    }

    /// The order can change part way through, because a file is often several
    /// files stuck together.
    [Fact]
    public void AnOrderLineOnlyAppliesToTheLinesAfterIt()
    {
        CallHistory history = CallHistory.Parse("""
            !!Order!!,Call,Name
            OM5M,Erik
            !!Order!!,Call,Sect
            W3LPL,MDC
            """);

        Assert.Equal("Erik", history.Find("OM5M")?.Name);
        Assert.Equal("MDC", history.Find("W3LPL")?.Section);
    }

    [Fact]
    public void AlaterLineWinsForACallThatAppearsTwice()
    {
        CallHistory history = CallHistory.Parse("""
            !!Order!!,Call,Name
            OM5M,Erik
            OM5M,Eric
            """);

        Assert.Equal("Eric", history.Find("OM5M")?.Name);
        Assert.Equal(1, history.Count);
    }

    [Fact]
    public void UserTextIsAddedToRatherThanReplaced()
    {
        CallHistory history = CallHistory.Parse("""
            !!Order!!,Call,UserText
            OM5M,first
            OM5M,second
            """);

        Assert.Equal("first second", history.Find("OM5M")?.UserText);
    }

    [Fact]
    public void UserTextIsReplacedWhenTheFileAsksForIt()
    {
        CallHistory history = CallHistory.Parse("""
            !!NoAppendUserText!!
            !!Order!!,Call,UserText
            OM5M,first
            OM5M,second
            """);

        Assert.Equal("second", history.Find("OM5M")?.UserText);
    }

    /// A directive must not be read as a callsign.
    [Fact]
    public void ADirectiveIsNotData()
    {
        CallHistory history = CallHistory.Parse("""
            !!ValidateArrlSection!!
            !!Order!!,Call,Name
            OM5M,Erik
            """);

        Assert.Equal(1, history.Count);
        Assert.Null(history.Find("!!ValidateArrlSection!!"));
    }

    /// `!!MapOnSection!!`: the old Ontario sections are stored as `ON`.
    [Theory]
    [InlineData("ONN", "ON")]
    [InlineData("GTA", "ON")]
    [InlineData("EMA", "EMA")]
    public void MapOnSectionStoresTheOntarioSectionsAsOne(string section, string expected) =>
        Assert.Equal(
            expected,
            Section("!!MapOnSection!!", section));

    /// `!!ValidateArrlSection!!`: a section that is not one of N1MM's is
    /// dropped rather than stored.
    [Theory]
    [InlineData("EMA", "EMA")]
    [InlineData("XYZ", "")]
    [InlineData("ON", "")]
    public void ValidateArrlSectionDropsWhatIsNotASection(string section, string expected) =>
        Assert.Equal(expected, Section("!!ValidateArrlSection!!", section));

    /// `!!GTA2GH_NT2TER!!`: the two renamed sections.
    [Theory]
    [InlineData("GTA", "GH")]
    [InlineData("NT", "TER")]
    [InlineData("ONN", "ONN")]
    public void Gta2GhRenamesTheTwoSections(string section, string expected) =>
        Assert.Equal(expected, Section("!!GTA2GH_NT2TER!!", section));

    /// `!!Validate50State!!`: a state stays, a section becomes the state it is
    /// in, and anything else goes.
    [Theory]
    [InlineData("OH", "OH")]
    [InlineData("EMA", "MA")]
    [InlineData("SCV", "CA")]
    [InlineData("ONN", "")]
    [InlineData("XYZ", "")]
    public void Validate50StateKeepsOnlyStates(string state, string expected) =>
        Assert.Equal(
            expected,
            CallHistory.Parse($"""
                !!Validate50State!!
                !!Order!!,Call,State
                OM5M,{state}
                """).Find("OM5M")?.State);

    /// Without the directive the column is stored as the file wrote it.
    [Fact]
    public void AFileThatAsksForNoCleanupIsStoredAsItIs()
    {
        CallHistoryEntry? found = CallHistory.Parse("""
            !!Order!!,Call,Sect,State
            VE3ABC,ONN,XYZ
            """).Find("VE3ABC");

        Assert.Equal("ONN", found?.Section);
        Assert.Equal("XYZ", found?.State);
    }

    private static string? Section(string directive, string section) =>
        CallHistory.Parse($"""
            {directive}
            !!Order!!,Call,Sect
            VE3ABC,{section}
            """).Find("VE3ABC")?.Section;

    [Fact]
    public void ALineWithNoCallIsNotAnEntry() =>
        Assert.Equal(0, CallHistory.Parse(",Erik,JN88").Count);
}