using Inspectron.Epson.PrintServer.Telemetry;

namespace Inspectron.Epson.Tests.Telemetry;

public class InsinMessageFormatterTests
{
    [Fact]
    public void Format_single_pair_no_spaces()
    {
        var result = InsinMessageFormatter.Format(("printer", "192.168.1.10"));
        Assert.Equal("printer=192.168.1.10", result);
    }

    [Fact]
    public void Format_multiple_pairs_joined_by_space()
    {
        var result = InsinMessageFormatter.Format(
            ("printer", "192.168.1.10"),
            ("jobId", "42"));
        Assert.Equal("printer=192.168.1.10 jobId=42", result);
    }

    [Fact]
    public void Format_quotes_value_containing_space()
    {
        var result = InsinMessageFormatter.Format(("error", "paper end detected"));
        Assert.Equal("error=\"paper end detected\"", result);
    }

    [Fact]
    public void Format_escapes_embedded_double_quote()
    {
        var result = InsinMessageFormatter.Format(("error", "he said \"nope\""));
        Assert.Equal("error=\"he said \\\"nope\\\"\"", result);
    }

    [Fact]
    public void Format_treats_null_or_empty_value_as_empty_string()
    {
        var result = InsinMessageFormatter.Format(("model", (string?)null), ("name", ""));
        Assert.Equal("model= name=", result);
    }

    [Fact]
    public void Format_omits_pairs_with_null_or_empty_key()
    {
        var result = InsinMessageFormatter.Format(
            ("", "ignored"),
            ("printer", "192.168.1.10"));
        Assert.Equal("printer=192.168.1.10", result);
    }
}