<?php
/**
 * Widget block histogram modules Pandora FMS Console
 *
 * @category   Console Class
 * @package    Pandora FMS
 * @subpackage Widget
 * @version    1.0.0
 * @license    See below
 *
 *    ______                 ___                    _______ _______ ________
 * |   __ \.-----.--.--.--|  |.-----.----.-----. |    ___|   |   |     __|
 * |    __/|  _  |     |  _  ||  _  |   _|  _  | |    ___|       |__     |
 * |___|   |___._|__|__|_____||_____|__| |___._| |___|   |__|_|__|_______|
 *
 * ============================================================================
 * Copyright (c) 2005-2023 Pandora FMS
 * Please see https://pandorafms.com/community/ for full contribution list
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation for version 2.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * ============================================================================
 */

namespace PandoraFMS\Dashboard;

use PandoraFMS\Enterprise\Metaconsole\Node;

global $config;

/**
 * URL Widgets
 */
class BlockHistogram extends Widget
{

    /**
     * Name widget.
     *
     * @var string
     */
    protected $name;

    /**
     * Title widget.
     *
     * @var string
     */
    protected $title;

    /**
     * Page widget;
     *
     * @var string
     */
    protected $page;

    /**
     * Class name widget.
     *
     * @var [type]
     */
    protected $className;

    /**
     * Values options for each widget.
     *
     * @var [type]
     */
    protected $values;

    /**
     * Configuration required.
     *
     * @var boolean
     */
    protected $configurationRequired;

    /**
     * Error load widget.
     *
     * @var boolean
     */
    protected $loadError;

    /**
     * Width.
     *
     * @var integer
     */
    protected $width;

    /**
     * Heigth.
     *
     * @var integer
     */
    protected $height;

    /**
     * Grid Width.
     *
     * @var integer
     */
    protected $gridWidth;

    /**
     * Cell ID.
     *
     * @var integer
     */
    protected $cellId;


    /**
     * Construct.
     *
     * @param integer      $cellId      Cell ID.
     * @param integer      $dashboardId Dashboard ID.
     * @param integer      $widgetId    Widget ID.
     * @param integer|null $width       New width.
     * @param integer|null $height      New height.
     * @param integer|null $gridWidth   Grid width.
     */
    public function __construct(
        int $cellId,
        int $dashboardId=0,
        int $widgetId=0,
        ?int $width=0,
        ?int $height=0,
        ?int $gridWidth=0
    ) {
        global $config;

        // WARNING: Do not edit. This chunk must be in the constructor.
        parent::__construct(
            $cellId,
            $dashboardId,
            $widgetId
        );

        // Include.
        include_once $config['homedir'].'/include/functions_reporting.php';

        // Width.
        $this->width = $width;

        // Height.
        $this->height = $height;

        // Grid Width.
        $this->gridWidth = $gridWidth;

        // Cell Id.
        $this->cellId = $cellId;

        // Options.
        $this->values = $this->decoders($this->getOptionsWidget());

        // Positions.
        $this->position = $this->getPositionWidget();

        // Page.
        $this->page = basename(__FILE__);

        // ClassName.
        $class = new \ReflectionClass($this);
        $this->className = $class->getShortName();

        // Title.
        $this->title = __('Block histogram');

        // Name.
        if (empty($this->name) === true) {
            $this->name = 'single_graph';
        }

        // This forces at least a first configuration.
        $this->configurationRequired = false;
        if (empty($this->values['moduleBlockHistogram']) === true) {
            $this->configurationRequired = true;
        }

        $this->overflow_scrollbars = false;
    }


    /**
     * Decoders hack for retrocompability.
     *
     * @param array $decoder Values.
     *
     * @return array Returns the values ​​with the correct key.
     */
    public function decoders(array $decoder): array
    {
        $values = [];
        // Retrieve global - common inputs.
        $values = parent::decoders($decoder);

        $values['agentsBlockHistogram'] = [];
        if (isset($decoder['agentsBlockHistogram']) === true) {
            if (isset($decoder['agentsBlockHistogram'][0]) === true
                && empty($decoder['agentsBlockHistogram']) === false
            ) {
                $values['agentsBlockHistogram'] = explode(
                    ',',
                    $decoder['agentsBlockHistogram'][0]
                );
            }
        }

        if (isset($decoder['selectionBlockHistogram']) === true) {
            $values['selectionBlockHistogram'] = $decoder['selectionBlockHistogram'];
        }

        $values['moduleBlockHistogram'] = [];
        if (isset($decoder['moduleBlockHistogram']) === true) {
            if (empty($decoder['moduleBlockHistogram']) === false) {
                $values['moduleBlockHistogram'] = $decoder['moduleBlockHistogram'];
            }
        }

        if (isset($decoder['period']) === true) {
            $values['period'] = $decoder['period'];
        }

        if (isset($decoder['fontColor']) === true) {
            $values['fontColor'] = $decoder['fontColor'];
        }

        $values['label'] = 'module';
        if (isset($decoder['label']) === true) {
            $values['label'] = $decoder['label'];
        }

        return $values;
    }


    /**
     * Generates inputs for form (specific).
     *
     * @return array Of inputs.
     *
     * @throws Exception On error.
     */
    public function getFormInputs(): array
    {
        $values = $this->values;

        // Retrieve global - common inputs.
        $inputs = parent::getFormInputs();

        // Default values.
        if (isset($values['period']) === false) {
            $values['period'] = SECONDS_1DAY;
        }

        if (empty($values['fontColor']) === true) {
            $values['fontColor'] = '#2c3e50';
        }

        $inputs[] = [
            'label'     => __('Font color'),
            'arguments' => [
                'wrapper' => 'div',
                'name'    => 'fontColor',
                'type'    => 'color',
                'value'   => $values['fontColor'],
                'return'  => true,
            ],
        ];

        // Type Label.
        $fields = [
            'module'       => __('Module'),
            'agent'        => __('Agent'),
            'agent_module' => __('Agent / module'),
        ];

        $inputs[] = [
            'label'     => __('Label'),
            'arguments' => [
                'type'     => 'select',
                'fields'   => $fields,
                'name'     => 'label',
                'selected' => $values['label'],
                'return'   => true,
            ],
        ];

        // Periodicity.
        $inputs[] = [
            'label'     => __('Interval'),
            'arguments' => [
                'name'          => 'period',
                'type'          => 'interval',
                'value'         => $values['period'],
                'nothing'       => __('None'),
                'nothing_value' => 0,
                'style_icon'    => 'flex-grow: 0',
                'script'        => 'check_period_warning(this, \''.__('Warning').'\', \''.__('Displaying items with extended historical data can have an impact on system performance. We do not recommend that you use intervals longer than 30 days, especially if you combine several of them in a report, dashboard or visual console.').'\')',
                'script_input'  => 'check_period_warning_manual(\'period\', \''.__('Warning').'\', \''.__('Displaying items with extended historical data can have an impact on system performance. We do not recommend that you use intervals longer than 30 days, especially if you combine several of them in a report, dashboard or visual console.').'\')',
            ],
        ];

        $inputs[] = [
            'arguments' => [
                'type'                   => 'select_multiple_modules_filtered_select2',
                'agent_values'           => agents_get_agents_selected(0),
                'agent_name'             => 'agentsBlockHistogram[]',
                'agent_ids'              => $values['agentsBlockHistogram'],
                'selectionModules'       => $values['selectionBlockHistogram'],
                'selectionModulesNameId' => 'selectionBlockHistogram',
                'modules_ids'            => $values['moduleBlockHistogram'],
                'modules_name'           => 'moduleBlockHistogram[]',
            ],
        ];

        return $inputs;
    }


    /**
     * Get Post for widget.
     *
     * @return array
     */
    public function getPost():array
    {
        // Retrieve global - common inputs.
        $values = parent::getPost();

        $values['agentsBlockHistogram'] = \get_parameter(
            'agentsBlockHistogram',
            []
        );
        $values['selectionBlockHistogram'] = \get_parameter(
            'selectionBlockHistogram',
            0
        );

        $values['moduleBlockHistogram'] = \get_parameter(
            'moduleBlockHistogram'
        );

        $agColor = [];
        if (isset($values['agentsBlockHistogram'][0]) === true
            && empty($values['agentsBlockHistogram'][0]) === false
        ) {
            $agColor = explode(',', $values['agentsBlockHistogram'][0]);
        }

        $agModule = [];
        if (isset($values['moduleBlockHistogram'][0]) === true
            && empty($values['moduleBlockHistogram'][0]) === false
        ) {
            $agModule = explode(',', $values['moduleBlockHistogram'][0]);
        }

        $values['moduleBlockHistogram'] = get_same_modules_all(
            $agColor,
            $agModule
        );

        $values['period'] = \get_parameter('period', 0);

        $values['fontColor'] = \get_parameter('fontColor', '#2c3e50');

        $values['label'] = \get_parameter('label', 'agent');
        return $values;
    }


    /**
     * Draw widget.
     *
     * @return string;
     */
    public function load()
    {
        global $config;

        $size = parent::getSize();

        $output = '';

        if (is_metaconsole() === true) {
            $modules_nodes = array_reduce(
                $this->values['moduleBlockHistogram'],
                function ($carry, $item) {
                    $explode = explode('|', $item);
                    $carry[$explode[0]][] = $explode[1];
                    return $carry;
                },
                []
            );

            $modules = [];
            foreach ($modules_nodes as $n => $mod) {
                try {
                    $node = new Node((int) $n);
                    $node->connect();
                    $node_mods = $this->getInfoModules($mod);
                    if (empty($node_mods) === false) {
                        foreach ($node_mods as $value) {
                            $value['id_node'] = $n;
                            $value['server_name'] = $node->toArray()['server_name'];
                            $modules[] = $value;
                        }
                    }

                    $node->disconnect();
                } catch (\Exception $e) {
                    // Unexistent agent.
                    $node->disconnect();
                }
            }
        } else {
            $modules = $this->getInfoModules(
                $this->values['moduleBlockHistogram']
            );
        }

        if ($modules !== false && empty($modules) === false) {
            $total_modules = count($modules);
            $output .= '<div class="container-histograms" style="width: '.$size['width'].'px;">';
            $output .= '<table class="table-container-histograms" style="color:'.$this->values['fontColor'].'">';
            foreach ($modules as $key => $module) {
                $last = false;
                if (($total_modules - 1)  === $key) {
                    $last = true;
                }

                if (is_metaconsole() === true) {
                    try {
                        $node = new Node((int) $module['id_node']);
                        $node->connect();
                        $output .= $this->drawHistograms($module, $last);

                        $node->disconnect();
                    } catch (\Exception $e) {
                        // Unexistent agent.
                        $node->disconnect();
                    }
                } else {
                    $output .= $this->drawHistograms($module, $last);
                }
            }

            $output .= '</table>';
            $output .= '</div>';
        } else {
            $output .= '<div class="container-center">';
            $output .= \ui_print_info_message(
                __('Not found modules'),
                '',
                true
            );
            $output .= '</div>';
        }

        return $output;
    }


    /**
     * Get info modules.
     *
     * @param array $modules Modules.
     *
     * @return array Data.
     */
    private function getInfoModules(array $modules): array
    {
        $where = sprintf(
            'tagente_modulo.id_agente_modulo IN (%s)
            AND tagente_modulo.delete_pending = 0',
            implode(',', $modules)
        );

        $sql = sprintf(
            'SELECT tagente_modulo.id_agente_modulo AS `id`,
                tagente_modulo.nombre AS `name`,
                tagente_modulo.unit AS `unit`,
                tagente.alias AS `agent_alias`,
                tagente.id_agente AS `agent_id`
            FROM tagente_modulo
            INNER JOIN tagente
                ON tagente_modulo.id_agente = tagente.id_agente
            WHERE %s',
            $where
        );

        $modules = db_get_all_rows_sql($sql);

        if ($modules === false) {
            $modules = [];
        }

        return $modules;
    }


    /**
     * Draw histogram module.
     *
     * @param array   $data Info module.
     * @param boolean $last Last histogram.
     *
     * @return string
     */
    private function drawHistograms(array $data, bool $last):string
    {
        global $config;

        $size = parent::getSize();

        // Desactive scroll bars only this item.
        $id_agent = $data['agent_id'];
        $id_module = $data['id'];
        $period = $this->values['period'];
        switch ($this->values['label']) {
            case 'module':
                $label = ui_print_truncate_text(
                    $data['name'],
                    25,
                    false,
                    true,
                    true,
                    '[&hellip;]',
                    ''
                );
            break;

            case 'agent_module':
                $label = ui_print_truncate_text(
                    $data['agent_alias'].' / '.$data['name'],
                    25,
                    false,
                    true,
                    true
                );
            break;

            default:
            case 'agent':
                $label = ui_print_truncate_text(
                    $data['agent_alias'],
                    25,
                    false,
                    true,
                    true,
                    '[&hellip;]',
                    ''
                );
            break;
        }

        $size_label = 10;

        $id_group = \agents_get_agent_group($id_agent);

        $height_graph = 30;
        if ($last === true) {
            if ($period > 86500) {
                $height_graph = 60;
            } else {
                $height_graph = 50;
            }
        }

        $content = [
            'id_agent_module' => $id_module,
            'period'          => $period,
            'time_from'       => '00:00:00',
            'time_to'         => '00:00:00',
            'id_group'        => $id_group,
            'sizeForTicks'    => ($size['width'] - 200),
            'showLabelTicks'  => ($last === true) ? true : false,
            'height_graph'    => $height_graph,
            [
                ['id_agent_module' => $id_module],
            ]
        ];

        $graph = \reporting_module_histogram_graph(
            ['datetime' => time()],
            $content
        );

        $style = 'min-width:200px;';
        if ($last === false) {
            if ($period > 86500) {
                $style .= 'width:calc(100% - 24px); margin-left: 12px;';
            } else {
                $style .= 'width:calc(100% - 16px); margin-left: 8px;';
            }
        } else {
            $style .= 'height:60px;';
        }

        $st = 'font-size:'.$size_label.'px;';
        if (is_metaconsole() === false) {
            $st .= 'height: 28px;';
        }

        $output = '<tr>';
            $output .= '<td style="width: 170px; vertical-align: initial;">';
            $output .= '<div class="widget-histogram-label" style="'.$st.'">';
                $output .= $label;
            $output .= '</div>';
            $output .= '</td>';
            $output .= '<td>';
            $output .= '<div class="widget-histogram-chart" style="'.$style.'">';
                $output .= $graph['chart'];
            $output .= '</div>';
            $output .= '</td>';
        $output .= '</tr>';

        return $output;
    }


    /**
     * Get description.
     *
     * @return string.
     */
    public static function getDescription()
    {
        return __('Block histogram');
    }


    /**
     * Get Name.
     *
     * @return string.
     */
    public static function getName()
    {
        return 'BlockHistogram';
    }


    /**
     * Get size Modal Configuration.
     *
     * @return array
     */
    public function getSizeModalConfiguration(): array
    {
        $size = [
            'width'  => (is_metaconsole() === true) ? 700 : 500,
            'height' => 670,
        ];

        return $size;
    }


}