using ImportAssist.Core;
using Xunit;

namespace ImportAssist.Core.Tests;

public sealed class InvoiceAnalysisReportValidationTests
{
    [Theory]
    [InlineData(3, "INV-002", true)]
    [InlineData(99, "INV-002", false)]
    [InlineData(null, "INV-002", false)]
    [InlineData(3, "INV-999", false)]
    [InlineData(2, "INV-001", false)]
    [InlineData(3, null, false)]
    public void Validate_ChecksFindingAgainstSourceReport(
        int? lineNumber,
        string? invoiceId,
        bool expectedValid)
    {
        var analysis = CreateAnalysis(lineNumber, invoiceId);
        var report = CreateReport("INV-002");

        var errors = InvoiceAnalysisValidator.Validate(analysis, report);

        if (expectedValid)
            Assert.Empty(errors);
        else
            Assert.NotEmpty(errors);
    }

    [Theory]
    [InlineData("")]
    [InlineData(" \t")]
    public void Validate_AcceptsNullForMissingSourceInvoiceId(
        string sourceInvoiceId)
    {
        var analysis = CreateAnalysis(3, null);
        var report = CreateReport(sourceInvoiceId);

        var errors = InvoiceAnalysisValidator.Validate(analysis, report);

        Assert.Empty(errors);
    }

    private static InvoiceAnalysis CreateAnalysis(
        int? lineNumber,
        string? invoiceId) =>
        new(
            Summary: "Testanalyse",
            Findings:
            [
                new AnalysisFinding(
                    LineNumber: lineNumber,
                    InvoiceId: invoiceId,
                    RuleId: "INV-002",
                    Description: "Kundennummer fehlt.",
                    NextCheck: "Kundennummer anhand des Belegs prüfen.",
                    MissingInformation: ["Kundennummer"])
            ],
            Limitations: []);

    private static ImportReport CreateReport(string invoiceId) =>
        new(
            SourceBlob: "test.csv",
            CheckedAtUtc: DateTimeOffset.UnixEpoch,
            Status: "Completed",
            Rows:
            [
                new InvoiceCheckResult(
                    LineNumber: 2,
                    InvoiceId: "INV-001",
                    IsValid: true,
                    Errors: []),
                new InvoiceCheckResult(
                    LineNumber: 3,
                    InvoiceId: invoiceId,
                    IsValid: false,
                    Errors: ["Kundennummer fehlt."])
            ],
            FileErrors: []);
}