<?php

namespace Github\Api;

use Github\Exception\MissingArgumentException;

/**
 * Listing, creating and updating deployments.
 *
 * @link https://developer.github.com/v3/repos/deployments/
 */
class Deployment extends AbstractApi
{
    /**
     * List deployments for a particular repository
     * @link https://developer.github.com/v3/repos/deployments/#list-deployments
     *
     * @param  string $username   the username of the user who owns the repository
     * @param  string $repository the name of the repository
     * @param  array $params      query parameters to filter deployments by (see link)
     * @return array              the deployments requested
     */
    public function all($username, $repository, array $params = array())
    {
        return $this->get('repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/deployments', $params);
    }

    /**
     * Create a new deployment for the given username and repo.
     * @link https://developer.github.com/v3/repos/deployments/#create-a-deployment
     *
     * Important: Once a deployment is created, it cannot be updated. Changes are indicated by creating new statuses.
     * @see updateStatus
     *
     * @param  string $username   the username
     * @param  string $repository the repository
     * @param  array  $params     the new deployment data
     * @return array  information about the deployment
     *
     * @throws MissingArgumentException
     */
    public function create($username, $repository, array $params)
    {
        if (!isset($params['ref'])) {
            throw new MissingArgumentException(array('ref'));
        }

        return $this->post('repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/deployments', $params);
    }

    /**
     * Updates a deployment by creating a new status update.
     * @link https://developer.github.com/v3/repos/deployments/#create-a-deployment-status
     *
     * @param string $username the username
     * @param string $repository the repository
     * @param string $id the deployment number
     * @param array $params The information about the deployment update.
     *                       Must include a "state" field of pending, success, error, or failure.
     *                       May also be given a target_url and description, ßee link for more details.
     * @return array information about the deployment
     *
     * @throws MissingArgumentException
     */
    public function updateStatus($username, $repository, $id, array $params)
    {
        if (!isset($params['state'])) {
            throw new MissingArgumentException(array('state'));
        }

        return $this->post('repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/deployments/'.rawurlencode($id).'/statuses', $params);
    }

    /**
     * Gets all of the status updates tied to a given deployment.
     *
     * @param  string $username the username
     * @param  string $repository the repository
     * @param  int $id the deployment identifier
     * @return array the deployment statuses
     */
    public function getStatuses($username, $repository, $id)
    {
        return $this->get('repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/deployments/'.rawurlencode($id).'/statuses');
    }
}