<?php
/**
 * Piwik - free/libre analytics platform
 *
 * @link http://piwik.org
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 *
 */
namespace Piwik\Plugins\UsersManager;

use Piwik\Config;
use Piwik\Period\PeriodValidator;
use Piwik\Piwik;
use Piwik\Plugins\SitesManager\API as APISitesManager;
use Piwik\Plugins\UsersManager\API as APIUsersManager;

class UserPreferences
{
    /**
     * @var APIUsersManager
     */
    private $api;

    public function __construct()
    {
        $this->api = APIUsersManager::getInstance();
    }

    /**
     * Returns default site ID that Piwik should load.
     *
     * _Note: This value is a Piwik setting set by each user._
     *
     * @return bool|int
     * @api
     */
    public function getDefaultWebsiteId()
    {
        $defaultReport = $this->getDefaultReport();

        if (is_numeric($defaultReport) && Piwik::isUserHasViewAccess($defaultReport)) {
            return $defaultReport;
        }

        $sitesId = APISitesManager::getInstance()->getSitesIdWithAtLeastViewAccess();

        if (!empty($sitesId)) {
            return $sitesId[0];
        }

        return false;
    }

    /**
     * Returns default site ID that Piwik should load.
     *
     * _Note: This value is a Piwik setting set by each user._
     *
     * @return bool|int
     * @api
     */
    public function getDefaultReport()
    {
        // User preference: default website ID to load
        $defaultReport = $this->api->getUserPreference(Piwik::getCurrentUserLogin(), APIUsersManager::PREFERENCE_DEFAULT_REPORT);

        if (!is_numeric($defaultReport)) {
            return $defaultReport;
        }

        if ($defaultReport && Piwik::isUserHasViewAccess($defaultReport)) {
            return $defaultReport;
        }

        return false;
    }

    /**
     * Returns default date for Piwik reports.
     *
     * _Note: This value is a Piwik setting set by each user._
     *
     * @return string `'today'`, `'2010-01-01'`, etc.
     * @api
     */
    public function getDefaultDate()
    {
        list($defaultDate, $defaultPeriod) = $this->getDefaultDateAndPeriod();

        return $defaultDate;
    }

    /**
     * Returns default period type for Piwik reports.
     *
     * @param string $defaultDate the default date string from which the default period will be guessed
     * @return string `'day'`, `'week'`, `'month'`, `'year'` or `'range'`
     * @api
     */
    public function getDefaultPeriod($defaultDate = null)
    {
        list($defaultDate, $defaultPeriod) = $this->getDefaultDateAndPeriod($defaultDate);

        return $defaultPeriod;
    }

    private function getDefaultDateAndPeriod($defaultDate = null)
    {
        $defaultPeriod = $this->getDefaultPeriodWithoutValidation($defaultDate);
        if (! $defaultDate) {
            $defaultDate = $this->getDefaultDateWithoutValidation();
        }

        $periodValidator = new PeriodValidator();
        if (! $periodValidator->isPeriodAllowedForUI($defaultPeriod)) {
            $defaultDate = $this->getSystemDefaultDate();
            $defaultPeriod = $this->getSystemDefaultPeriod();
        }

        return array($defaultDate, $defaultPeriod);
    }

    public function getDefaultDateWithoutValidation()
    {
        // NOTE: a change in this function might mean a change in plugins/UsersManager/javascripts/usersSettings.js as well
        $userSettingsDate = $this->api->getUserPreference(Piwik::getCurrentUserLogin(), APIUsersManager::PREFERENCE_DEFAULT_REPORT_DATE);
        if ($userSettingsDate == 'yesterday') {
            return $userSettingsDate;
        }
        // if last7, last30, etc.
        if (strpos($userSettingsDate, 'last') === 0
            || strpos($userSettingsDate, 'previous') === 0
        ) {
            return $userSettingsDate;
        }

        return 'today';
    }

    public function getDefaultPeriodWithoutValidation($defaultDate = null)
    {
        if (empty($defaultDate)) {
            $defaultDate = $this->api->getUserPreference(Piwik::getCurrentUserLogin(), APIUsersManager::PREFERENCE_DEFAULT_REPORT_DATE);
        }

        if (empty($defaultDate)) {
            return $this->getSystemDefaultPeriod();
        }

        if (in_array($defaultDate, array('today', 'yesterday'))) {
            return 'day';
        }

        if (strpos($defaultDate, 'last') === 0
            || strpos($defaultDate, 'previous') === 0
        ) {
            return 'range';
        }

        return $defaultDate;
    }

    private function getSystemDefaultDate()
    {
        return Config::getInstance()->General['default_day'];
    }

    private function getSystemDefaultPeriod()
    {
        return Config::getInstance()->General['default_period'];
    }
}