<?php

namespace App\Controllers\Client;

use App\Database;
use App\Errors\AppException;
use App\Errors\UnauthorizedError;
use App\Models\Device;
use App\Models\User;
use App\Support\RequestValidator;
use Matrix\Enums\ErrorCode;
use Matrix\Responses\ClientAccountWhoamiGetResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\Routing\Attribute\Route;

class UserController
{
  #[Route(path: "/_matrix/client/v3/account/whoami", methods: ["GET"])]
  public function whoami(Request $request): Response
  {
    $user = User::authenticateWithRequest($request);
    $device = Device::fetch(userId: $user->getId());

    return new JsonResponse(new ClientAccountWhoamiGetResponse(
      userId: $user->getId(),
      deviceId: $device->getId(),
    ));
  }

  /**
   * @see https://spec.matrix.org/v1.16/client-server-api/#post_matrixclientv3useruseridfilter
   */
  #[Route(path: "/_matrix/client/r0/user/{userId}/filter", methods: ["POST"])]
  #[Route(path: "/_matrix/client/v3/user/{userId}/filter", methods: ["POST"])]
  public function uploadFilter(Request $request): Response
  {
    $accessToken = str_replace("Bearer ", "", $request->headers->get("authorization") ?: "");
    $user = User::fetchWithAccessToken($accessToken);

    if (empty($user)) {
      throw new UnauthorizedError();
    }

    $userId = $request->get("userId");
    if ($user->getId() !== $userId) {
      throw new UnauthorizedError();
    }

    $body = json_decode($request->getContent(), true);
    RequestValidator::validateJson();

    $filterId = md5($userId . random_bytes(512));

    Database::getInstance()->query(<<<SQL
      insert into filters (id, account_data, event_fields, event_format, presence, room, user_id)
      values (:id, :account_data, :event_fields, :event_format, :presence, :room, :user_id)
    SQL, [
      "id" => $filterId,
      "account_data" => isset($body["account_data"]) ? json_encode($body["account_data"]) : null,
      "event_fields" => isset($body["event_fields"]) ? json_encode($body["event_fields"]) : null,
      "event_format" => isset($body["event_format"]) ? json_encode($body["event_format"]) : null,
      "presence" => isset($body["presence"]) ? json_encode($body["presence"]) : null,
      "room" => isset($body["room"]) ? json_encode($body["room"]) : null,
      "user_id" => $userId,
    ]);

    return new JsonResponse([
      "filter_id" => $filterId,
    ]);
  }
  
  #[Route(path: "/_matrix/client/v3/user/{userId}/{filter}/{filterId}", methods: ["GET"])]
  public function getFilter(Request $request): Response
  {
    $user = User::authenticateWithRequest($request);

    $userId = $request->attributes->get("userId");
    $filterId = $request->attributes->get("filterId");

    $filter = Database::getInstance()
      ->query("select * from filters where id=:id and user_id=:user_id", [
        "id" => $filterId,
        "user_id" => $userId,
      ])
      ->fetch();

    if (empty($filter)) {
      throw new AppException(
        ErrorCode::NOT_FOUND,
        "Unknown filter.",
        Response::HTTP_NOT_FOUND
      );
    }

    return new JsonResponse([
      "account_data" => json_decode($filter["account_data"] ?? ""),
      "event_fields" => json_decode($filter["event_fields"] ?? ""),
      "event_format" => $filter["event_format"] ?? "",
      "presence" => json_decode($filter["presence"] ?? ""),
      "room" => json_decode($filter["room"] ?? ""),
    ]);
  }
  
  #[Route(path: "/_matrix/client/v3/profile/{userId}", methods: ["GET"])]
  public function getProfile(Request $request): Response
  {
    $userId = $request->attributes->get("userId");

    $user = Database::getInstance()->query("select * from users where id=:user_id", ["user_id" => $userId])->fetch();
    
    if (empty($user)) {
      throw new AppException(
        ErrorCode::NOT_FOUND,
        "There is no profile information for this user or this user does not exist.",
        Response::HTTP_NOT_FOUND
      );
    }
    
    return new JsonResponse();
  }
}