using FluentAssertions;
using Marathon.Application.Export;

namespace Marathon.Application.Tests.Export;

public sealed class CsvTests
{
    [Theory]
    [InlineData("plain", "plain")]
    [InlineData("", "")]
    [InlineData("a,b", "\"a,b\"")]
    [InlineData("he said \"hi\"", "\"he said \"\"hi\"\"\"")]
    [InlineData("line1\nline2", "\"line1\nline2\"")]
    public void Escape_QuotesOnlyWhenNeeded(string input, string expected)
    {
        Csv.Escape(input).Should().Be(expected);
    }

    [Fact]
    public void Escape_Null_IsEmpty()
    {
        Csv.Escape(null).Should().BeEmpty();
    }

    [Fact]
    public void Document_JoinsHeaderAndRows_WithCrlf_AndEscapes()
    {
        var csv = Csv.Document(
            new[] { "Name", "Note" },
            new[]
            {
                (IReadOnlyList<string>)new[] { "Kelly", "ok" },
                new[] { "Flat, fixed", "say \"hi\"" },
            });

        csv.Should().Be(
            "Name,Note\r\n" +
            "Kelly,ok\r\n" +
            "\"Flat, fixed\",\"say \"\"hi\"\"\"\r\n");
    }

    [Theory]
    [InlineData("=cmd|'/c calc'!A1")]
    [InlineData("+1+1")]
    [InlineData("-2+3")]
    [InlineData("@SUM(A1)")]
    [InlineData("\ttab")]
    [InlineData("\rcr")]
    public void NeutralizeFormula_PrefixesLeadingFormulaTriggers(string dangerous)
    {
        Csv.NeutralizeFormula(dangerous).Should().Be("'" + dangerous);
    }

    [Theory]
    [InlineData("Home vs Away")]
    [InlineData("normal note")]
    [InlineData("3-1 win")]
    [InlineData("")]
    public void NeutralizeFormula_LeavesSafeValuesUntouched(string safe)
    {
        Csv.NeutralizeFormula(safe).Should().Be(safe);
    }

    [Fact]
    public void NeutralizeFormula_Null_IsEmpty()
    {
        Csv.NeutralizeFormula(null).Should().BeEmpty();
    }
}