<?php

class Rest_PodcastEpisodesController extends Zend_Rest_Controller
{

    /**
     * @var Application_Service_PodcastEpisodeService
     */
    protected $_service;

    public function init()
    {
        $this->view->layout()->disableLayout();

        // Remove reliance on .phtml files to render requests
        $this->_helper->viewRenderer->setNoRender(true);
        $this->_service = new Application_Service_PodcastEpisodeService();
    }

    public function indexAction()
    {
        $id = $this->getId();
        if (!$id) {
            return;
        }

        try {
            $this->getResponse()
                ->setHttpResponseCode(201)
                ->appendBody(json_encode(PodcastEpisodes::getPodcastEpisodes($id)));
        } catch (PodcastNotFoundException $e) {
            $this->podcastNotFoundResponse();
            Logging::error($e->getMessage());
        } catch (Exception $e) {
            $this->unknownErrorResponse();
            Logging::error($e->getMessage());
        }
    }

    public function getAction()
    {
        //TODO: can we delete this?
        $id = $this->getId();
        if (!$id) {
            return;
        }

        $episodeId = $this->getEpisodeId();
        if (!$episodeId) {
            return;
        }

        try {
            $this->getResponse()
                ->setHttpResponseCode(201)
                ->appendBody(json_encode(PodcastEpisodes::getPodcastEpisodeById($episodeId)));

        } catch (PodcastNotFoundException $e) {
            $this->podcastNotFoundResponse();
            Logging::error($e->getMessage());
        } catch (PodcastEpisodeNotFoundException $e) {
            $this->podcastEpisodeNotFoundResponse();
            Logging::error($e->getMessage());
        } catch (Exception $e) {
            $this->unknownErrorResponse();
            Logging::error($e->getMessage());
        }
    }

    public function postAction()
    {
        //If we do get an episode ID on a POST, then that doesn't make any sense
        //since POST is only for creating.
        if ($episodeId = $this->_getParam('episode_id', false)) {
            $resp = $this->getResponse();
            $resp->setHttpResponseCode(400);
            $resp->appendBody("ERROR: Episode ID should not be specified when using POST. POST is only used for "
                            . "importing podcast episodes, and an episode ID will be chosen by Airtime");
            return;
        }

        // Make sure a podcast ID was specified
        $id = $this->getId();
        if (!$id) {
            return;
        }

        try {
            $requestData = json_decode($this->getRequest()->getRawBody(), true);
            $episode = $this->_service->importEpisode($id, $requestData["episode"]);
            $this->getResponse()
                ->setHttpResponseCode(201)
                ->appendBody(json_encode($episode));

        } catch (Exception $e) {
            $this->unknownErrorResponse();
            Logging::error($e->getMessage());
        }

    }

    public function deleteAction()
    {
        Logging::info("delete - episodes");

        //TODO: can we delete this?
        $id = $this->getId();
        if (!$id) {
            return;
        }

        $episodeId = $this->getEpisodeId();
        if (!$episodeId) {
            return;
        }

        try {
            PodcastEpisodes::deleteById($episodeId);
            $this->getResponse()
                ->setHttpResponseCode(204);
        } catch (PodcastEpisodeNotFoundException $e) {
            $this->podcastEpisodeNotFoundResponse();
            Logging::error($e->getMessage());
        } catch (Exception $e) {
            $this->unknownErrorResponse();
            Logging::error($e->getMessage());
        }
    }

    public function putAction()
    {

    }

    private function getId()
    {
        if (!$id = $this->_getParam('id', false)) {
            $resp = $this->getResponse();
            $resp->setHttpResponseCode(400);
            $resp->appendBody("ERROR: No podcast ID specified.");
            return false;
        }
        return $id;
    }

    private function getEpisodeId()
    {
        if (!$episodeId = $this->_getParam('episode_id', false)) {
            $resp = $this->getResponse();
            $resp->setHttpResponseCode(400);
            $resp->appendBody("ERROR: No podcast episode ID specified.");
            return false;
        }
        return $episodeId;
    }

    private function unknownErrorResponse()
    {
        $resp = $this->getResponse();
        $resp->setHttpResponseCode(400);
        $resp->appendBody("An unknown error occurred.");
    }

    private function podcastNotFoundResponse()
    {
        $resp = $this->getResponse();
        $resp->setHttpResponseCode(404);
        $resp->appendBody("ERROR: Podcast not found.");
    }

    private function podcastEpisodeNotFoundResponse()
    {
        $resp = $this->getResponse();
        $resp->setHttpResponseCode(404);
        $resp->appendBody("ERROR: Podcast episode not found.");
    }

}