using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;

namespace SQLInsight.Agent.Tests;

public sealed class InstallerSettingsTests : IDisposable
{
    private readonly string _folder = Path.Combine(Path.GetTempPath(), "sqlinsight-ini-" + Guid.NewGuid().ToString("N"));

    public InstallerSettingsTests()
    {
        Directory.CreateDirectory(_folder);
        File.WriteAllText(Path.Combine(_folder, "appsettings.json"), """
            { "SQLInsight": { "Repository": { "ConnectionString": "eksempel" }, "Tick": "00:00:15", "MaxParallelInstances": 4 } }
            """);
        File.WriteAllText(Path.Combine(_folder, InstallerSettings.FileName), """
            [SQLInsight:Repository]
            ConnectionString=Server=sqlmon01;Database=SQLInsight;Integrated Security=true
            [SQLInsight:Instances:0]
            Name=sql01
            Server=sql01
            [SQLInsight]
            Tick=00:00:30
            """);
    }

    public void Dispose() => Directory.Delete(_folder, recursive: true);

    private HostApplicationBuilder Builder(params string[] args)
    {
        var builder = Host.CreateApplicationBuilder(new HostApplicationBuilderSettings { ContentRootPath = _folder, Args = args, EnvironmentName = "Production" });
        InstallerSettings.Add(builder.Configuration, _folder);
        return builder;
    }

    [Fact]
    public void Installer_values_override_the_examples_in_appsettings_json()
    {
        var options = Builder().Configuration.GetSection(AgentOptions.SectionName).Get<AgentOptions>()!;

        Assert.Equal("Server=sqlmon01;Database=SQLInsight;Integrated Security=true", options.Repository.ConnectionString);
        Assert.Equal("sql01", Assert.Single(options.Instances).Server);
        Assert.Equal(TimeSpan.FromSeconds(30), options.Tick);
        Assert.Equal(4, options.MaxParallelInstances);
    }

    [Fact]
    public void Command_line_still_overrides_the_installer_values()
    {
        var configuration = Builder("--SQLInsight:Repository:ConnectionString=fra-kommandolinjen").Configuration;

        Assert.Equal("fra-kommandolinjen", configuration["SQLInsight:Repository:ConnectionString"]);
    }

    [Fact]
    public void Missing_file_is_fine()
    {
        File.Delete(Path.Combine(_folder, InstallerSettings.FileName));

        Assert.Equal("eksempel", Builder().Configuration["SQLInsight:Repository:ConnectionString"]);
    }
}