<?php

namespace Directus\Api\Routes;

use Directus\Application\Application;
use Directus\Application\Http\Request;
use Directus\Application\Http\Response;
use Directus\Application\Route;
use Directus\Exception\UnauthorizedException;
use Directus\Services\TablesService;
use Directus\Util\ArrayUtils;

class Collections extends Route
{
    /**
     * @param Application $app
     */
    public function __invoke(Application $app)
    {
        $app->get('', [$this, 'all']);
        $app->post('', [$this, 'create']);
        $app->get('/{name}', [$this, 'read']);
        $app->patch('/{name}', [$this, 'update']);
        $app->delete('/{name}', [$this, 'delete']);
    }

    /**
     * @param Request $request
     * @param Response $response
     *
     * @return Response
     *
     * @throws \Exception
     */
    public function create(Request $request, Response $response)
    {
        $this->validateRequestPayload($request);
        $tableService = new TablesService($this->container);
        $payload = $request->getParsedBody();
        $params = $request->getQueryParams();
        $name = ArrayUtils::get($payload, 'collection');
        $data = ArrayUtils::omit($payload, 'collection');
        $responseData = $tableService->createTable($name, $data, $params);

        return $this->responseWithData($request, $response, $responseData);
    }

    /**
     * @param Request $request
     * @param Response $response
     *
     * @return Response
     */
    public function all(Request $request, Response $response)
    {
        $params = $request->getQueryParams();

        // directus_collections only contains user collections and the core collections will be merged atter the process of fetching data from DB. Offset and limit will apply only for user generated collections[DB] and then the core collection will getting merged. Thus, it should handled from PHP instead of DB.
        if (isset($params['offset'])) {
            $offset = $params['offset'];
            unset($params['offset']);
        }
        if (isset($params['limit'])) {
            $limit = $params['limit'];
            unset($params['limit']);
        }
        $service = new TablesService($this->container);
        $responseData = $service->findAll($params);
        if (isset($offset) && isset($limit)) {
            $responseData['data'] = array_slice($responseData['data'], $offset, $limit);
            if (isset($responseData['meta']) && isset($responseData['meta']['result_count'])) {
                $responseData['meta']['result_count'] = count($responseData['data']);
            }
        }
        return $this->responseWithData($request, $response, $responseData);
    }

    /**
     * @param Request $request
     * @param Response $response
     *
     * @return Response
     */
    public function read(Request $request, Response $response)
    {
        $service = new TablesService($this->container);
        $responseData = $service->findByIds(
            $request->getAttribute('name'),
            $request->getQueryParams()
        );

        return $this->responseWithData($request, $response, $responseData);
    }

    /**
     * @param Request $request
     * @param Response $response
     *
     * @return Response
     *
     * @throws UnauthorizedException
     */
    public function update(Request $request, Response $response)
    {
        $this->validateRequestPayload($request);
        $service = new TablesService($this->container);
        $responseData = $service->updateTable(
            $request->getAttribute('name'),
            $request->getParsedBody() ?: [],
            $request->getQueryParams()
        );

        return $this->responseWithData($request, $response, $responseData);
    }

    /**
     * @param Request $request
     * @param Response $response
     *
     * @return Response
     */
    public function delete(Request $request, Response $response)
    {
        $service = new TablesService($this->container);
        $service->delete(
            $request->getAttribute('name'),
            $request->getQueryParams()
        );

        $response = $response->withStatus(204);

        return $this->responseWithData($request, $response, []);
    }
}