using System;
using System.IO;
using System.Reflection;
using Gott.Services;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;

namespace Gott.Endpoints;

public static class InfoEndpoint
{
    public static void MapInfoEndpoint(this IEndpointRouteBuilder app)
    {
        app.MapGet("/api/info", HandleInfo);
    }

    private static IResult HandleInfo(EmbeddingService embeddingService)
    {
        var assembly = Assembly.GetExecutingAssembly();
        var location = assembly.Location;

        long buildTime = 0;

        if (!string.IsNullOrEmpty(location) && File.Exists(location))
        {
            var lastWrite = File.GetLastWriteTimeUtc(location);
            buildTime = new DateTimeOffset(lastWrite).ToUnixTimeSeconds();
        }
        else
        {
            var dir = AppContext.BaseDirectory;
            var exeName = System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(System.Runtime.InteropServices.OSPlatform.Windows) ? "gott.exe" : "gott";
            var exePath = Path.Combine(dir, exeName);
            if (File.Exists(exePath))
            {
                var lastWrite = File.GetLastWriteTimeUtc(exePath);
                buildTime = new DateTimeOffset(lastWrite).ToUnixTimeSeconds();
            }
        }

        var isWindows = System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(System.Runtime.InteropServices.OSPlatform.Windows);
        var embeddingAvailable = embeddingService.IsAvailable;
        return Results.Json(new { buildTime, isWindows, embeddingAvailable });
    }
}