using pgLabII.PgUtils.ConnectionStrings;

namespace pgLabII.PgUtils.Tests.ConnectionStrings;

public class ConnectionStringServiceTests
{
    private readonly ConnectionStringService svc = ConnectionStringService.CreateDefault();

    [Fact]
    public void DetectFormat_Url()
    {
        var r = svc.DetectFormat("postgresql://user@localhost/db");
        Assert.True(r.IsSuccess);
        Assert.Equal(ConnStringFormat.Url, r.Value);
    }

    [Fact]
    public void DetectFormat_Jdbc()
    {
        var r = svc.DetectFormat("jdbc:postgresql://localhost/db");
        Assert.True(r.IsSuccess);
        Assert.Equal(ConnStringFormat.Jdbc, r.Value);
    }

    [Fact]
    public void DetectFormat_Npgsql()
    {
        var r = svc.DetectFormat("Host=localhost;Database=db;Username=u");
        Assert.True(r.IsSuccess);
        Assert.Equal(ConnStringFormat.Npgsql, r.Value);
    }

    [Fact]
    public void DetectFormat_Libpq()
    {
        var r = svc.DetectFormat("host=localhost dbname=db user=u");
        Assert.True(r.IsSuccess);
        Assert.Equal(ConnStringFormat.Libpq, r.Value);
    }

    [Fact]
    public void ParseToDescriptor_DispatchesByFormat()
    {
        var r1 = svc.ParseToDescriptor("host=localhost dbname=db user=u");
        Assert.True(r1.IsSuccess);
        var r2 = svc.ParseToDescriptor("Host=localhost;Database=db;Username=u");
        Assert.True(r2.IsSuccess);
        var r3 = svc.ParseToDescriptor("postgresql://u@localhost/db");
        Assert.True(r3.IsSuccess);
    }

    [Fact]
    public void Convert_Libpq_to_Npgsql()
    {
        var input = "host=localhost port=5433 dbname=mydb user=alice password=secret sslmode=require";
        var r = svc.Convert(input, ConnStringFormat.Npgsql);
        Assert.True(r.IsSuccess);
        var s = r.Value;
        Assert.Contains("Host=localhost", s);
        Assert.Contains("Port=5433", s);
        Assert.Contains("Database=mydb", s);
        Assert.Contains("Username=alice", s);
        Assert.Contains("Password=secret", s);
        Assert.Contains("SSL Mode=Require", s);
    }

    [Fact]
    public void Convert_Url_to_Libpq()
    {
        var input = "postgresql://bob:pwd@host1:5432,host2:5433/db?application_name=cli&sslmode=prefer";
        var r = svc.Convert(input, ConnStringFormat.Libpq);
        Assert.True(r.IsSuccess);
        var s = r.Value;
        Assert.Contains("host=host1,host2", s);
        // Ports differ (5432 vs 5433), libpq formatter emits a single port only when all ports are the same
        Assert.DoesNotContain("port=", s);
        Assert.Contains("dbname=db", s);
        Assert.Contains("user=bob", s);
        Assert.Contains("sslmode=prefer", s);
    }
}