<?php
/* Copyright (C) 2018      Alexandre Spangaro   <aspangaro@open-dsi.fr>
 * Copyright (c) 2018      Fidesio              <contact@fidesio.com>
 * Copyright (C) 2021		Gauthier VERDOL         <gauthier.verdol@atm-consulting.fr>
 *
 * 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; either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

/**
 *  \file       htdocs/salaries/class/salariesstats.class.php
 *  \ingroup    salaries
 *  \brief      File of class for statistics on salaries
 */
include_once DOL_DOCUMENT_ROOT.'/core/class/stats.class.php';
include_once DOL_DOCUMENT_ROOT.'/salaries/class/salary.class.php';

/**
 *	Classe permettant la gestion des stats des salaires
 */
class SalariesStats extends Stats
{
	/**
	 * @var string Name of table without prefix where object is stored
	 */
	public $table_element;

	public $socid;
	public $userid;

	public $from;
	public $field;
	public $where;

	/**
	 * Constructor
	 *
	 * @param   DoliDB      $db        Database handler
	 * @param   int         $socid     Id third party
	 * @param   mixed       $userid    Id user for filter or array of user ids
	 * @return  void
	 */
	public function __construct($db, $socid = 0, $userid = 0)
	{
		global $conf;

		$this->db = $db;
		$this->socid = $socid;
		$this->userid = $userid;

		$object = new Salary($this->db);
		$this->from = MAIN_DB_PREFIX.$object->table_element;
		$this->field = 'amount';

		$this->where = " entity = ".$conf->entity;
		if ($this->socid > 0) {
			$this->where .= " AND fk_soc = ".((int) $this->socid);
		}
		if (is_array($this->userid) && count($this->userid) > 0) {
			$this->where .= ' AND fk_user IN ('.$this->db->sanitize(join(',', $this->userid)).')';
		} elseif ($this->userid > 0) {
			$this->where .= " AND fk_user = ".((int) $this->userid);
		}
	}


	/**
	 *  Return the number of salary by year
	 *
	 *	@return		array	Array of values
	 */
	public function getNbByYear()
	{
		$sql = "SELECT YEAR(dateep) as dm, count(*)";
		$sql .= " FROM ".$this->from;
		$sql .= " WHERE ".$this->where;
		$sql .= " GROUP BY dm DESC";

		return $this->_getNbByYear($sql);
	}


	/**
	 *  Return the number of salary by month, for a given year
	 *
	 *	@param	string	$year		Year to scan
	 *	@param	int		$format		0=Label of abscissa is a translated text, 1=Label of abscissa is month number, 2=Label of abscissa is first letter of month
	 *	@return	array				Array of values
	 */
	public function getNbByMonth($year, $format = 0)
	{
		$sql = "SELECT MONTH(dateep) as dm, count(*)";
		$sql .= " FROM ".$this->from;
		$sql .= " WHERE YEAR(dateep) = ".((int) $year);
		$sql .= " AND ".$this->where;
		$sql .= " GROUP BY dm";
		$sql .= $this->db->order('dm', 'DESC');

		$res = $this->_getNbByMonth($year, $sql, $format);

		return $res;
	}


	/**
	 * 	Return amount of salaries by month for a given year
	 *
	 *	@param	int		$year		Year to scan
	 *	@param	int		$format		0=Label of abscissa is a translated text, 1=Label of abscissa is month number, 2=Label of abscissa is first letter of month
	 *	@return	array				Array of values
	 */
	public function getAmountByMonth($year, $format = 0)
	{
		$sql = "SELECT date_format(dateep,'%m') as dm, sum(".$this->field.")";
		$sql .= " FROM ".$this->from;
		$sql .= " WHERE date_format(dateep,'%Y') = '".$this->db->escape($year)."'";
		$sql .= " AND ".$this->where;
		$sql .= " GROUP BY dm";
		$sql .= $this->db->order('dm', 'DESC');

		$res = $this->_getAmountByMonth($year, $sql, $format);

		return $res;
	}

	/**
	 *	Return average amount
	 *
	 *	@param	int		$year		Year to scan
	 *	@return	array				Array of values
	 */
	public function getAverageByMonth($year)
	{
		$sql = "SELECT date_format(dateep,'%m') as dm, avg(".$this->field.")";
		$sql .= " FROM ".$this->from;
		$sql .= " WHERE date_format(dateep,'%Y') = '".$this->db->escape($year)."'";
		$sql .= " AND ".$this->where;
		$sql .= " GROUP BY dm";
		$sql .= $this->db->order('dm', 'DESC');

		return $this->_getAverageByMonth($year, $sql);
	}

	/**
	 *	Return nb, total and average
	 *
	 *	@return	array				Array of values
	 */
	public function getAllByYear()
	{
		$sql = "SELECT date_format(dateep,'%Y') as year, count(*) as nb, sum(".$this->field.") as total, avg(".$this->field.") as avg";
		$sql .= " FROM ".$this->from;
		$sql .= " WHERE ".$this->where;
		$sql .= " GROUP BY year";
		$sql .= $this->db->order('year', 'DESC');

		return $this->_getAllByYear($sql);
	}
}
