<?php

namespace WP_Piwik;

use WP_Piwik;

/**
 * Abstract widget class
 *
 * @author Andr&eacute; Br&auml;kling
 * @package WP_Piwik
 */
abstract class Widget
{

    /**
     *
     * @var WP_Piwik
     */
    protected static $wpPiwik;

    /**
     * @var Settings
     */
    protected static $settings;

    protected $isShortcode = false, $method = '', $title = '', $context = 'side', $priority = 'core', $parameter = array(), $apiID = array(), $pageId = 'dashboard', $blogId = null, $name = 'Value', $limit = 10, $content = '', $output = '';

    /**
     * Widget constructor
     *
     * @param WP_Piwik $wpPiwik
     *            current WP-Piwik object
     * @param Settings $settings
     *            current WP-Piwik settings
     * @param string $pageId
     *            WordPress page ID (default: dashboard)
     * @param string $context
     *            WordPress meta box context (defualt: side)
     * @param string $priority
     *            WordPress meta box priority (default: default)
     * @param array $params
     *            widget parameters (default: empty array)
     * @param boolean $isShortcode
     *            is the widget shown inline? (default: false)
     */
    public function __construct($wpPiwik, $settings, $pageId = 'dashboard', $context = 'side', $priority = 'default', $params = array(), $isShortcode = false)
    {
        self::$wpPiwik = $wpPiwik;
        self::$settings = $settings;
        $this->pageId = $pageId;
        $this->context = $context;
        $this->priority = $priority;
        if (self::$settings->checkNetworkActivation() && function_exists('is_super_admin') && is_super_admin() && isset ($_GET ['wpmu_show_stats'])) {
            switch_to_blog(( int )$_GET ['wpmu_show_stats']);
            $this->blogId = get_current_blog_id();
            restore_current_blog();
        }
        $this->isShortcode = $isShortcode;
        $prefix = ($this->pageId == 'dashboard' ? self::$settings->getGlobalOption('plugin_display_name') . ' - ' : '');
        $this->configure($prefix, $params);
        if (is_array($this->method))
            foreach ($this->method as $method) {
                $this->apiID [$method] = Request::register($method, $this->parameter);
                self::$wpPiwik->log("Register request: " . $this->apiID [$method]);
            }
        else {
            $this->apiID [$this->method] = Request::register($this->method, $this->parameter);
            self::$wpPiwik->log("Register request: " . $this->apiID [$this->method]);
        }
        if ($this->isShortcode)
            return;
        add_meta_box($this->getName(), $this->title, array(
            $this,
            'show'
        ), $pageId, $this->context, $this->priority);
    }

    /**
     * Conifguration dummy method
     *
     * @param string $prefix
     *            metabox title prefix (default: empty)
     * @param array $params
     *            widget parameters (default: empty array)
     */
    protected function configure($prefix = '', $params = array())
    {
    }

    /**
     * Default show widget method, handles default Piwik output
     */
    public function show()
    {
        $response = self::$wpPiwik->request($this->apiID [$this->method]);
        if (!empty ($response ['result']) && $response ['result'] == 'error')
            $this->out('<strong>' . __('Piwik error', 'wp-piwik') . ':</strong> ' . htmlentities($response ['message'], ENT_QUOTES, 'utf-8'));
        else {
            if (isset ($response [0] ['nb_uniq_visitors']))
                $unique = 'nb_uniq_visitors';
            else
                $unique = 'sum_daily_nb_uniq_visitors';
            $tableHead = array(
                'label' => __($this->name, 'wp-piwik')
            );
            $tableHead [$unique] = __('Unique', 'wp-piwik');
            if (isset ($response [0] ['nb_visits']))
                $tableHead ['nb_visits'] = __('Visits', 'wp-piwik');
            if (isset ($response [0] ['nb_hits']))
                $tableHead ['nb_hits'] = __('Hits', 'wp-piwik');
            if (isset ($response [0] ['nb_actions']))
                $tableHead ['nb_actions'] = __('Actions', 'wp-piwik');
            $tableBody = array();
            $count = 0;
            if (is_array($response))
                foreach ($response as $rowKey => $row) {
                    $count++;
                    $tableBody [$rowKey] = array();
                    foreach ($tableHead as $key => $value)
                        $tableBody [$rowKey] [] = isset ($row [$key]) ? $row [$key] : '-';
                    if ($count == 10)
                        break;
                }
            $this->table($tableHead, $tableBody, null);
        }
    }

    /**
     * Display or store shortcode output
     */
    protected function out($output)
    {
        if ($this->isShortcode)
            $this->output .= $output;
        else echo $output;
    }

    /**
     * Return shortcode output
     */
    public function get()
    {
        return $this->output;
    }

    /**
     * Display a HTML table
     *
     * @param array $thead
     *            table header content (array of cells)
     * @param array $tbody
     *            table body content (array of rows)
     * @param array $tfoot
     *            table footer content (array of cells)
     * @param string $class
     *            CSSclass name to apply on table sections
     * @param string $javaScript
     *            array of javascript code to apply on body rows
     */
    protected function table($thead, $tbody = array(), $tfoot = array(), $class = false, $javaScript = array(), $classes = array())
    {
        $this->out('<div class="table"><table class="widefat wp-piwik-table">');
        if ($this->isShortcode && $this->title) {
            $colspan = !empty ($tbody) ? count($tbody[0]) : 2;
            $this->out('<tr><th colspan="' . $colspan . '">' . $this->title . '</th></tr>');
        }
        if (!empty ($thead))
            $this->tabHead($thead, $class);
        if (!empty ($tbody))
            $this->tabBody($tbody, $class, $javaScript, $classes);
        else
            $this->out('<tr><td colspan="10">' . __('No data available.', 'wp-piwik') . '</td></tr>');
        if (!empty ($tfoot))
            $this->tabFoot($tfoot, $class);
        $this->out('</table></div>');
    }

    /**
     * Display a HTML table header
     *
     * @param array $thead
     *            array of cells
     * @param string $class
     *            CSS class to apply
     */
    private function tabHead($thead, $class = false)
    {
        $this->out('<thead' . ($class ? ' class="' . $class . '"' : '') . '><tr>');
        $count = 0;
        foreach ($thead as $value)
            $this->out('<th' . ($count++ ? ' class="right"' : '') . '>' . $value . '</th>');
        $this->out('</tr></thead>');
    }

    /**
     * Display a HTML table body
     *
     * @param array $tbody
     *            array of rows, each row containing an array of cells
     * @param string $class
     *            CSS class to apply
     * @param array $javaScript
     *            array of javascript code to apply (one item per row)
     */
    private function tabBody($tbody, $class = "", $javaScript = array(), $classes = array())
    {
        $this->out('<tbody' . ($class ? ' class="' . $class . '"' : '') . '>');
        foreach ($tbody as $key => $trow)
            $this->tabRow($trow, isset($javaScript [$key]) ? $javaScript [$key] : '', isset ($classes [$key]) ? $classes [$key] : '');
        $this->out('</tbody>');
    }

    /**
     * Display a HTML table footer
     *
     * @param array $tfoor
     *            array of cells
     * @param string $class
     *            CSS class to apply
     */
    private function tabFoot($tfoot, $class = false)
    {
        $this->out('<tfoot' . ($class ? ' class="' . $class . '"' : '') . '><tr>');
        $count = 0;
        foreach ($tfoot as $value)
            $this->out('<td' . ($count++ ? ' class="right"' : '') . '>' . $value . '</td>');
        $this->out('</tr></tfoot>');
    }

    /**
     * Display a HTML table row
     *
     * @param array $trow
     *            array of cells
     * @param string $javaScript
     *            javascript code to apply
     */
    private function tabRow($trow, $javaScript = '', $class = '')
    {
        $this->out('<tr' . (!empty ($javaScript) ? ' onclick="' . $javaScript . '"' : '') . (!empty ($class) ? ' class="' . $class . '"' : '') . '>');
        $count = 0;
        foreach ($trow as $tcell)
            $this->out('<td' . ($count++ ? ' class="right"' : '') . '>' . $tcell . '</td>');
        $this->out('</tr>');
    }

    /**
     * Get the current request's Piwik time settings
     *
     * @return array time settings: period => Piwik period, date => requested date, description => time description to show in widget title
     */
    protected function getTimeSettings()
    {
        switch (self::$settings->getGlobalOption('default_date')) {
            case 'today' :
                $period = 'day';
                $date = 'today';
                $description = __('today', 'wp-piwik');
                break;
            case 'current_month' :
                $period = 'month';
                $date = 'today';
                $description = __('current month', 'wp-piwik');
                break;
            case 'last_month' :
                $period = 'month';
                $date = date("Y-m-d", strtotime("last day of previous month"));
                $description = __('last month', 'wp-piwik');
                break;
            case 'current_week' :
                $period = 'week';
                $date = 'today';
                $description = __('current week', 'wp-piwik');
                break;
            case 'last_week' :
                $period = 'week';
                $date = date("Y-m-d", strtotime("-1 week"));
                $description = __('last week', 'wp-piwik');
                break;
            case 'yesterday' :
                $period = 'day';
                $date = 'yesterday';
                $description = __('yesterday', 'wp-piwik');
                break;
            default :
                break;
        }
        return array(
            'period' => $period,
            'date' => isset ($_GET ['date']) ? ( int )$_GET ['date'] : $date,
            'description' => isset ($_GET ['date']) ? $this->dateFormat($_GET ['date'], $period) : $description
        );
    }

    /**
     * Format a date to show in widget
     *
     * @param string $date
     *            date string
     * @param string $period
     *            Piwik period
     * @return string formatted date
     */
    protected function dateFormat($date, $period = 'day')
    {
        $prefix = '';
        switch ($period) {
            case 'week' :
                $prefix = __('week', 'wp-piwik') . ' ';
                $format = 'W/Y';
                break;
            case 'short_week' :
                $format = 'W';
                break;
            case 'month' :
                $format = 'F Y';
                $date = date('Y-m-d', strtotime($date));
                break;
            default :
                $format = get_option('date_format');
        }
        return $prefix . date_i18n($format, strtotime($date));
    }

    /**
     * Format time to show in widget
     *
     * @param int $time
     *            time in seconds
     * @return string formatted time
     */
    protected function timeFormat($time)
    {
        return floor($time / 3600) . 'h ' . floor(($time % 3600) / 60) . 'm ' . floor(($time % 3600) % 60) . 's';
    }

    /**
     * Convert Piwik range into meaningful text
     *
     * @return string range description
     */
    public function rangeName()
    {
        switch ($this->parameter ['date']) {
            case 'last90' :
                return __('last 90 days', 'wp-piwik');
            case 'last60' :
                return __('last 60 days', 'wp-piwik');
            case 'last30' :
                return __('last 30 days', 'wp-piwik');
            case 'last12' :
                return __('last 12 ' . $this->parameter ['period'] . 's', 'wp-piwik');
            default :
                return $this->parameter ['date'];
        }
    }

    /**
     * Get the widget name
     *
     * @return string widget name
     */
    public function getName()
    {
        return str_replace('\\', '-', get_called_class());
    }

    /**
     * Display a pie chart
     *
     * @param
     *            array chart data array(array(0 => name, 1 => value))
     */
    public function pieChart($data)
    {
        $labels = '';
        $values = '';
        foreach ($data as $key => $dataSet) {
            $labels .= '"' . htmlentities($dataSet [0]) . '", ';
            $values .= htmlentities($dataSet [1]) . ', ';
            if ($key == 'Others') break;
        }
        ?>
        <div>
            <canvas id="<?php echo 'wp-piwik_stats_' . $this->getName() . '_graph' ?>"></canvas>
        </div>
        <script>
            new Chart(
                document.getElementById('<?php echo 'wp-piwik_stats_' . $this->getName() . '_graph'; ?>'),
                {
                    type: 'pie',
                    data: {
                        labels: [<?php echo $labels ?>],
                        datasets: [
                            {
                                label: '',
                                data: [<?php echo $values; ?>],
                                backgroundColor: [
                                    '#4dc9f6',
                                    '#f67019',
                                    '#f53794',
                                    '#537bc4',
                                    '#acc236',
                                    '#166a8f',
                                    '#00a950',
                                    '#58595b',
                                    '#8549ba'
                                ]
                            }
                        ]
                    },
                    options: {
                        radius:"90%"
                    }
                }
            );
        </script>
        <?php
    }

    /**
     * Return an array value by key, return '-' if not set
     *
     * @param array $array
     *            array to get a value from
     * @param string $key
     *            key of the value to get from array
     * @return string found value or '-' as a placeholder
     */
    protected function value($array, $key)
    {
        return (isset ($array [$key]) ? $array [$key] : '-');
    }
}