using ClaudeMailbox.Config;

namespace ClaudeMailbox.Tests.Config;

public sealed class ConfigResolverTests
{
    [Fact]
    public void CliFlag_WinsOverFile()
    {
        var file = new FileConfig { Port = 1000 };
        var cfg = ConfigResolver.Build(new[] { "--port", "9999" }, file);
        Assert.Equal(9999, cfg.Port);
    }

    [Fact]
    public void File_WinsOverDefault()
    {
        var file = new FileConfig { Port = 1000, Bind = "0.0.0.0", DbPath = "/tmp/x.db" };
        var cfg = ConfigResolver.Build(Array.Empty<string>(), file);
        Assert.Equal(1000, cfg.Port);
        Assert.Equal("0.0.0.0", cfg.BindAddress);
        Assert.Equal(Paths.Expand("/tmp/x.db"), cfg.DbPath);
    }

    [Fact]
    public void Default_UsedWhenNeitherCliNorFile()
    {
        var cfg = ConfigResolver.Build(Array.Empty<string>(), new FileConfig());
        Assert.Equal(DaemonConfig.DefaultPort, cfg.Port);
        Assert.Equal(DaemonConfig.DefaultBindAddress, cfg.BindAddress);
        Assert.Equal(Paths.DefaultDbPath(), cfg.DbPath);
    }

    [Fact]
    public void Mixed_CliPort_FileDbPath_DefaultBind()
    {
        var file = new FileConfig { DbPath = "/tmp/mixed.db" };
        var cfg = ConfigResolver.Build(new[] { "--port", "7000" }, file);
        Assert.Equal(7000, cfg.Port);
        Assert.Equal(DaemonConfig.DefaultBindAddress, cfg.BindAddress);
        Assert.Equal(Paths.Expand("/tmp/mixed.db"), cfg.DbPath);
    }

    [Fact]
    public void CliDbPath_ExpandsEnvVars()
    {
        var file = new FileConfig();
        var cfg = ConfigResolver.Build(new[] { "--db-path", "~/foo.db" }, file);
        Assert.DoesNotContain("~", cfg.DbPath);
    }

    [Fact]
    public void InvalidPortFlag_FallsBackToFileOrDefault()
    {
        var file = new FileConfig { Port = 4242 };
        var cfg = ConfigResolver.Build(new[] { "--port", "not-a-number" }, file);
        Assert.Equal(4242, cfg.Port);
    }
}