using Nonemm.App.Configuration;

namespace Nonemm.App.Tests;

public class SettingsTests : IDisposable
{
    private readonly string path = Path.Combine(Path.GetTempPath(), $"nonemm-{Guid.NewGuid():N}.json");

    public void Dispose() => File.Delete(path);

    private Settings Load(string json)
    {
        File.WriteAllText(path, json);
        return Settings.Load(path);
    }

    [Fact]
    public void AFileWithNullsInItReadsAsTheDefaults()
    {
        Settings settings = Load(
            """
            {
              "ClusterHost": null,
              "ClusterCommands": null,
              "ClusterNodes": null,
              "TelnetButtons": null,
              "SpotFilter": null,
              "Radios": null,
              "Station": null,
              "CwMessages": null
            }
            """);

        Assert.Equal("", settings.ClusterHost);
        Assert.Empty(settings.ClusterCommands);
        Assert.Empty(settings.ClusterNodes);
        Assert.Empty(settings.TelnetButtons);
        Assert.Empty(settings.SpotFilter.Bands);
        Assert.Empty(settings.Radios);
        Assert.Equal("", settings.Station.Callsign);
        Assert.Empty(settings.CwMessages);
    }

    [Fact]
    public void ANullInsideAStoredNodeIsFilledInToo()
    {
        Settings settings = Load(
            """
            {
              "ClusterNodes": [ { "Name": null, "Host": "dxc.example.net", "Commands": null } ]
            }
            """);

        StoredClusterNode node = Assert.Single(settings.ClusterNodes);
        Assert.Equal("", node.Name);
        Assert.Empty(node.Commands);
    }

    [Fact]
    public void WhatTheFileSaysIsKept()
    {
        Settings settings = Load("""{ "ClusterHost": "dxc.example.net", "ClusterPort": 7300 }""");

        Assert.Equal("dxc.example.net", settings.ClusterHost);
        Assert.Equal(7300, settings.ClusterPort);
    }

    [Fact]
    public void TheTwelveMessagesAnOlderFileHoldsBecomeAFunctionKeyFile()
    {
        Settings settings = Load(
            """
            {
              "CwMessages": [ "CQ TEST {MYCALL}", "5NN {EXCH}" ]
            }
            """);

        Assert.Empty(settings.CwMessages);
        Assert.Equal("F1 CQ,CQ TEST {MYCALL}\nF2 Exch,5NN {EXCH}", settings.CwMessageFile);
    }

    [Fact]
    public void AFileTextThatIsAlreadyThereIsLeftAlone()
    {
        Settings settings = Load(
            """
            {
              "CwMessageFile": "F1 CQ,CQ",
              "CwMessages": [ "old" ]
            }
            """);

        Assert.Equal("F1 CQ,CQ", settings.CwMessageFile);
    }
}