using System;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;
using Microsoft.Extensions.Options;
using PolyTrader.Web.Configuration;
using PolyTrader.Web.Security;

namespace PolyTrader.Web.Endpoints
{
    public static class AuthEndpoints
    {
        public record LoginRequest(string? Token);
        public record TokenResponse(string Token);

        public static IEndpointRouteBuilder MapAuthEndpoints(this IEndpointRouteBuilder routes)
        {
            var group = routes.MapGroup("/api/auth");

            group.MapGet("/status", (HttpContext context, IOptions<WebUiOptions> optionsProvider) =>
            {
                var options = optionsProvider.Value;
                bool isConfigured = !string.IsNullOrWhiteSpace(options.AuthToken);
                bool isAuthenticated = TokenAuthMiddleware.IsAuthenticated(context, options.AuthToken);

                return Results.Ok(new
                {
                    isConfigured,
                    isAuthenticated
                });
            });

            group.MapPost("/login", (LoginRequest req, HttpContext context, IOptions<WebUiOptions> optionsProvider) =>
            {
                var options = optionsProvider.Value;

                if (string.IsNullOrWhiteSpace(options.AuthToken))
                {
                    return Results.BadRequest(new { error = "Kein Zugangs-Token im System konfiguriert." });
                }

                if (string.IsNullOrWhiteSpace(req.Token) || !TokenAuthMiddleware.ValidateToken(req.Token, options.AuthToken))
                {
                    return Results.Json(new { error = "Ungültiges Zugangs-Token." }, statusCode: StatusCodes.Status401Unauthorized);
                }

                context.Response.Cookies.Append(TokenAuthMiddleware.CookieName, req.Token.Trim(), new CookieOptions
                {
                    HttpOnly = true,
                    SameSite = SameSiteMode.Strict,
                    Secure = context.Request.IsHttps,
                    Expires = DateTimeOffset.UtcNow.AddHours(options.SessionTimeoutHours),
                    Path = "/"
                });

                return Results.Ok(new { success = true });
            });

            group.MapPost("/logout", (HttpContext context) =>
            {
                context.Response.Cookies.Delete(TokenAuthMiddleware.CookieName, new CookieOptions
                {
                    Path = "/"
                });
                return Results.Ok(new { success = true });
            });

            return routes;
        }
    }
}