using System.Text.Json;

namespace backend.Tools;

public class GetCurrentTimeTool : ITool
{
    public string Name => "get_current_time";
    public string Description => "Returns the current UTC time as an ISO-8601 string.";
    public bool RunsDuringResponse => false;

    public JsonElement ParameterSchema { get; } =
        JsonDocument.Parse("""{"type":"object","properties":{},"required":[]}""").RootElement;

    public Task<ToolResult> ExecuteAsync(ToolInvocation invocation, DeviceContext device, CancellationToken ct)
    {
        var now = DateTimeOffset.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssZ");
        var output = JsonDocument.Parse($$"""{"now":"{{now}}"}""").RootElement;
        return Task.FromResult(new ToolResult(output));
    }
}