<?php

// Pandora FMS - the Flexible Monitoring System
// ============================================
// Copyright (c) 2009 Artica Soluciones Tecnologicas, http://www.artica.es
// Please see http://pandora.sourceforge.net for full contribution list

// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License (LGPL)
// 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.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

require_once ("include/functions_agents.php");

/** 
 * Get SLA of a module.
 * 
 * @param int Agent module to calculate SLA
 * @param int Period to check the SLA compliance.
 * @param int Minimum data value the module in the right interval
 * @param int Maximum data value the module in the right interval
 * @param int Beginning date of the report in UNIX time (current date by default).
 * 
 * @return int SLA percentage of the requested module.
 */
function get_agent_module_sla ($id_agent_module, $period, $min_value, $max_value, $date = 0) {
	if (empty ($date))
		$date = get_system_time ();
	
	if (empty ($period))
		return false; //We can't calculate a 0 period (division by zero)
	
	$datelimit = $date - $period; // start date
	
	/* Get all the data in the interval */
	$sql = sprintf ('SELECT datos, utimestamp FROM tagente_datos 
			WHERE id_agente_modulo = %d 
			AND utimestamp > %d AND utimestamp <= %d 
			ORDER BY utimestamp ASC',
			$id_agent_module, $datelimit, $date);
	$datas = get_db_all_rows_sql ($sql);
	if ($datas === false) {
		
		/* Try to get data from tagente_estado. It may found nothing because of
		data compression */
		$sql = sprintf ('SELECT datos, utimestamp FROM tagente_estado 
			WHERE id_agente_modulo = %d 
			AND utimestamp > %d AND utimestamp <= %d 
			ORDER BY utimestamp ASC',
			$id_agent_module, $datelimit, $date);
		$data = get_db_sql ($sql);
		
		if ($data === false) {
			//No data to calculate on so we return 0.
			return 0;
		}
		$datas = array ();
		array_push ($datas, $data);
	}
	
	$last_data = "";
	$total_badtime = 0;
	$interval_begin = 0;
	$interval_last = $date;
	$previous_data_timestamp = 0;
	
	/* Get also the previous data before the selected interval. */
	$previous_data = get_previous_data ($id_agent_module, $datelimit);
	
	if ($previous_data) {
		/* Add data to the beginning */
		array_unshift ($datas, $previous_data);
		$previous_data_timestamp = $previous_data['utimestamp'];
	}
	
	foreach ($datas as $data) {
		if ($data["datos"] > $max_value || $data["datos"] < $min_value) {
			if ($interval_begin == 0) {
				$interval_begin = $data["utimestamp"];
			}
		} elseif ($interval_begin != 0) {
			// Here ends interval with data outside valid values,
			// Need to add this time to counter
			$interval_last = $data["utimestamp"];
			$temp_time = $interval_last - $interval_begin;
			$total_badtime += $temp_time;
			$interval_begin = 0;
			$interval_last = 0;
		}
	}
	
	/* Check the last interval, if any */
	if ($interval_begin != 0) {
		/* The last time was the time of the previous data in the 
		interval. That means that in all the interval, the data was 
		not between the expected values, so the SLA is zero. */
		if ($interval_begin = $previous_data_timestamp)
			return 0;
		$total_badtime += $interval_last - $interval_begin;
	}
	
	$result = 100 - ($total_badtime / $period) * 100;
	return max ($result, 0);
}

/** 
 * Get general stats info on a group
 * 
 * @param int Group Id to get info.
 * 
 * @return array
 */
function get_group_stats ($id_group) {
	$data = array ();
	$data["monitor_checks"] = 0;
	$data["monitor_not_init"] = 0;
	$data["monitor_unknown"] = 0;
	$data["monitor_ok"] = 0;
	$data["monitor_bad"] = 0; // Critical + Unknown + Warning
	$data["monitor_warning"] = 0;
	$data["monitor_critical"] = 0;
	$data["monitor_alerts"] = 0;
	$data["monitor_alerts_fired"] = 0;
	$data["monitor_alerts_fire_count"] = 0;
	$data["total_checks"] = 0;	
	$data["total_alerts"] = 0;
	$data["total_agents"] = 0;
	$data["total_alerts"] = 0;
	$data["total_checks"] = 0;
	$data["monitor_health"] = 100;
	$data["alert_level"] = 100;
	$data["module_sanity"] = 100;
	$data["server_sanity"] = 100;
	$cur_time = get_system_time ();
	
	$groups = array_keys (get_user_groups ());
	if ($id_group > 0 && in_array ($groups, $id_group)) {
		//If a group is selected, and we have permissions to it then we don't need to look for them
		$groups = array ();
		$groups[0] = $id_group;
	}

	//Select all modules in group
	$agents = get_group_agents ($groups);
	$modules = array ();
	$module_ids = array ();
	
	if (empty ($agents)) {
		//No agents in this group, means no data
		return $data;
	}
	
	$sql = sprintf ("SELECT tagente_estado.id_agente_modulo, 
							tagente_modulo.id_tipo_modulo, 
							estado, datos, 
							current_interval, 
							utimestamp 
					FROM tagente_estado, tagente_modulo 
					WHERE tagente_modulo.id_agente_modulo = tagente_estado.id_agente_modulo 
					    AND tagente_modulo.delete_pending = 0 
						AND	tagente_modulo.id_agente IN (%s)", implode (",", array_keys ($agents)));
	$result = get_db_all_rows_sql ($sql);
	
	if ($result === false) {
		return $data;
	}

	foreach ($result as $row) {
		$last_update = $cur_time - $row["utimestamp"];

		$data["monitor_checks"]++; 
			
		//Check whether it's down, not init, unknown or OK
		if ($last_update == $cur_time) {
			//The utimestamp is 0 and has never been updated
			$data["monitor_not_init"]++;
		} elseif ($last_update >= ($row["current_interval"] * 2)) {
			//The utimestamp is greater than 2x the interval (it has timed out)
			$data["monitor_unknown"]++;
		} elseif ($row["estado"] == 1){
			$data["monitor_critical"]++;
		} elseif ($row["estado"] == 2){
			$data["monitor_warning"]++;
		}
		 else {
			$data["monitor_ok"]++;
		}
	
		$fired = get_db_value ('times_fired', 'talert_template_modules', 'id_agent_module', $row["id_agente_modulo"]);
		if ($fired !== false) {
			$data["monitor_alerts"]++;
			if ($fired > 0) {
				$data["monitor_alerts_fired"]++;
				$data["monitor_alerts_fire_count"] += $fired;
			}
		}
	} //End foreach module
	
	$data["total_agents"] = count ($agents);
	$data["total_checks"] = $data["monitor_checks"];
	$data["total_ok"] = $data["monitor_ok"];
	// Todo, count SNMP Alerts and Inventory alerts here
	$data["total_alerts"] = $data["monitor_alerts"] + $data["monitor_alerts_fired"];
	$data["total_alerts_fired"] =  $data["monitor_alerts_fired"];
	$data["total_alerts_fire_count"] =  $data["monitor_alerts_fire_count"];
	$data["monitor_bad"] = $data["monitor_critical"] + $data["monitor_unknown"] +$data["monitor_warning"];
	$data["total_bad"] =  $data["monitor_bad"];
	$data["total_not_init"] = $data["monitor_not_init"];
	$data["total_down"] = $data["monitor_critical"];

	/*
	 Monitor health (percentage)
	 Data health (percentage)
	 Global health (percentage)
	 Module sanity (percentage)
	 Alert level (percentage)
	 
	 Server Sanity	0% Uninitialized modules
	 
	 */
	if ($data["monitor_bad"] > 0 && $data["monitor_checks"] > 0) {
		$data["monitor_health"] = format_numeric (100 - ($data["monitor_bad"] / ($data["monitor_checks"] / 100)), 1);
	} else {
		$data["monitor_health"] = 100;
	}
	
	if ($data["total_bad"] > 0 && $data["total_checks"] > 0) {
		$data["global_health"] = format_numeric (100 - ($data["total_bad"] / ($data["total_checks"] / 100)), 1);
	} else {
		$data["global_health"] = 100;
	}

	if ($data["total_not_init"] > 0 && $data["total_checks"] > 0) {
		$data["module_sanity"] = format_numeric (100 - ($data["total_not_init"] / ($data["total_checks"] / 100)), 1);
	} else {
		$data["module_sanity"] = 100;
	}
	
	if ($data["total_alerts_fired"] > 0 && $data["total_alerts"] > 0) {
		$data["alert_level"] = format_numeric (100 - ($data["total_alerts_fired"] / ($data["total_alerts"] / 100)), 1);
	} else {
		$data["alert_level"] = 100;
	}
	
	$data["server_sanity"] = 100 - $data["module_sanity"];
	
	return $data;
}

/** 
 * Get an event reporting table.
 *
 * It construct a table object with all the events happened in a group
 * during a period of time.
 * 
 * @param int Group id to get the report.
 * @param int Period of time to get the report.
 * @param int Beginning date of the report
 * @param int Flag to return or echo the report table (echo by default).
 * 
 * @return object A table object
 */
function event_reporting ($id_group, $period, $date = 0, $return = false) {
	if (empty ($date)) {
		$date = get_system_time ();
	} elseif (!is_numeric ($date)) {
		$date = strtotime ($date);
	}
	
	$table->data = array ();
	$table->head = array ();
	$table->head[0] = __('Status');
	$table->head[1] = __('Event name');
	$table->head[2] = __('User ID');
	$table->head[3] = __('Timestamp');
	
	$events = get_group_events ($id_group, $period, $date);
	if (empty ($events)) {
		$events = array ();
	}
	foreach ($events as $event) {
		$data = array ();
		if ($event["estado"] == 0)
			$data[0] = '<img src="images/dot_red.png" />';
		else
			$data[0] = '<img src="images/dot_green.png" />';
		$data[1] = $event['evento'];
		$data[2] = $event['id_usuario'] != '0' ? $event['id_usuario'] : '';
		$data[3] = $event["timestamp"];
		array_push ($table->data, $data);
	}

	if (empty ($return))
		print_table ($table);
	return $table;
}

/** 
 * Get a table report from a alerts fired array.
 * 
 * @param array Alerts fired array. 
 * @see function get_alerts_fired ()
 * 
 * @return object A table object with a report of the fired alerts.
 */
function get_fired_alerts_reporting_table ($alerts_fired) {
	$agents = array ();
	
	require_once ('include/functions_alerts.php');
	
	foreach (array_keys ($alerts_fired) as $id_alert) {
		$alert_module = get_alert_agent_module ($id_alert);
		$template = get_alert_template ($id_alert);
		
		/* Add alerts fired to $agents_fired_alerts indexed by id_agent */
		$id_agent = get_db_value ('id_agente', 'tagente_modulo',
			'id_agente_modulo', $alert_module['id_agent_module']);
		if (!isset ($agents[$id_agent])) {
			$agents[$id_agent] = array ();
		}
		array_push ($agents[$id_agent], array ($alert_module, $template));
	}
	
	$table->data = array ();
	$table->head = array ();
	$table->head[0] = __('Agent');
	$table->head[1] = __('Alert description');
	$table->head[2] = __('Times Fired');
	$table->head[3] = __('Priority');
	
	foreach ($agents as $id_agent => $alerts) {
		$data = array ();
		foreach ($alerts as $tuple) {
			$alert_module = $tuple[0];
			$template = $tuple[1];
			if (! isset ($data[0]))
				$data[0] = get_agent_name ($id_agent);
			else
				$data[0] = '';
			$data[1] = $template['name'];
			$data[2] = $alerts_fired[$alert_module['id']];
			$data[3] = get_alert_priority ($alert_module['priority']);
			array_push ($table->data, $data);
		}
	}
	
	return $table;
}

/**
 * Get a report for alerts in a group of agents.
 *
 * It prints the numbers of alerts defined, fired and not fired in a group.
 * It also prints all the alerts that were fired grouped by agents.
 *
 * @param int $id_group Group to get info of the alerts.
 * @param int $period Period of time of the desired alert report.
 * @param int $date Beggining date of the report (current date by default).
 * @param bool $return Flag to return or echo the report (echo by default).
 *
 * @return string
 */
function alert_reporting ($id_group, $period = 0, $date = 0, $return = false) {
	$output = '';
	$alerts = get_group_alerts ($id_group);
	$alerts_fired = get_alerts_fired ($alerts, $period, $date);
	
	$fired_percentage = 0;
	if (sizeof ($alerts) > 0)
		$fired_percentage = round (sizeof ($alerts_fired) / sizeof ($alerts) * 100, 2);
	$not_fired_percentage = 100 - $fired_percentage;
	$output .= '<img src="reporting/fgraph.php?tipo=alerts_fired_pipe&height=150&width=280&fired='.
		$fired_percentage.'&not_fired='.$not_fired_percentage.'" style="float: right; border: 1px solid black">';
	
	$output .= '<strong>'.__('Alerts fired').': '.sizeof ($alerts_fired).'</strong><br />';
	$output .= '<strong>'.__('Total alerts monitored').': '.sizeof ($alerts).'</strong><br />';

	if (! sizeof ($alerts_fired)) {
		if (!$return)
			echo $output;
		return $output;
	}
	$table = get_fired_alerts_reporting_table ($alerts_fired);
	$table->width = '100%';
	$table->class = 'databox';
	$table->size = array ();
	$table->size[0] = '100px';
	$table->style = array ();
	$table->style[0] = 'font-weight: bold';
	
	$output .= print_table ($table, true);
	
	if (!$return)
		echo $output;
	return $output;
}

/**
 * Get a report for monitors modules in a group of agents.
 *
 * It prints the numbers of monitors defined, showing those which went up and down, in a group.
 * It also prints all the down monitors in the group.
 *
 * @param int $id_group Group to get info of the monitors.
 * @param int $period Period of time of the desired monitor report.
 * @param int $date Beginning date of the report in UNIX time (current date by default).
 * @param bool $return Flag to return or echo the report (by default).
 *
 * @return string
 */
function monitor_health_reporting ($id_group, $period = 0, $date = 0, $return = false) {
	if (empty ($date)) //If date is 0, false or empty
		$date = get_system_time ();
		
	$datelimit = $date - $period;
	$output = '';
	
	$monitors = get_monitors_in_group ($id_group);
	if (empty ($monitors)) //If monitors has returned false or an empty array
		return;
	$monitors_down = get_monitors_down ($monitors, $period, $date);
	$down_percentage = round (count ($monitors_down) / count ($monitors) * 100, 2);
	$not_down_percentage = 100 - $down_percentage;
	
	$output .= '<strong>'.__('Total monitors').': '.count ($monitors).'</strong><br />';
	$output .= '<strong>'.__('Monitors down on period').': '.count ($monitors_down).'</strong><br />';
	
	$table = get_monitors_down_reporting_table ($monitors_down);
	$table->width = '100%';
	$table->class = 'databox';
	$table->size = array ();
	$table->size[0] = '100px';
	$table->style = array ();
	$table->style[0] = 'font-weight: bold';
	
	$table->size = array ();
	$table->size[0] = '100px';
	
	$output .= print_table ($table, true);
	
	//Floating it was ugly, moved it to the bottom
	$output .= '<img src="reporting/fgraph.php?tipo=monitors_health_pipe&height=150&width=280&down='.$down_percentage.'&amp;not_down='.$not_down_percentage.'" style="border: 1px solid black" />';
	
	if (!$return)
		echo $output;
	return $output;
}

/** 
 * Get a report table with all the monitors down.
 * 
 * @param array  An array with all the monitors down
 * @see function get_monitors_down()
 * 
 * @return object A table object with a monitors down report.
 */
function get_monitors_down_reporting_table ($monitors_down) {
	$table->data = array ();
	$table->head = array ();
	$table->head[0] = __('Agent');
	$table->head[1] = __('Monitor');
	
	$agents = array ();
	if ($monitors_down){
		foreach ($monitors_down as $monitor) {
			/* Add monitors fired to $agents_fired_alerts indexed by id_agent */
			$id_agent = $monitor['id_agente'];
			if (!isset ($agents[$id_agent])) {
				$agents[$id_agent] = array ();
			}
			array_push ($agents[$id_agent], $monitor);
			
			$monitors_down++;
		}
		foreach ($agents as $id_agent => $monitors) {
			$data = array ();
			foreach ($monitors as $monitor) {
				if (! isset ($data[0]))
					$data[0] = get_agent_name ($id_agent);
				else
					$data[0] = '';
				if ($monitor['descripcion'] != '') {
					$data[1] = $monitor['descripcion'];
				} else {
					$data[1] = $monitor['nombre'];
				}
				array_push ($table->data, $data);
			}
		}
	}
	return $table;
}

/**
 * Get a general report of a group of agents.
 *
 * It shows the number of agents and no more things right now. 
 *
 * @param int Group to get the report
 * @param bool Flag to return or echo the report (by default).
 * 
 * @return string
 */
function general_group_reporting ($id_group, $return = false) {
	$agents = get_group_agents ($id_group, false, "none");
	$output = '<strong>'.__('Agents in group').': '.count ($agents).'</strong><br />';
	
	if ($return === false)
		echo $output;
		
	return $output;
}

/** 
 * Get a report table of the fired alerts group by agents.
 * 
 * @param int Agent id to generate the report.
 * @param int Period of time of the report.
 * @param int Beginning date of the report in UNIX time (current date by default).
 * 
 * @return object A table object with the alert reporting..
 */
function get_agent_alerts_reporting_table ($id_agent, $period = 0, $date = 0) {
	$table->data = array ();
	$table->head = array ();
	$table->head[0] = __('Type');
	$table->head[1] = __('Description');
	$table->head[2] = __('Value');
	$table->head[3] = __('Threshold');
	$table->head[4] = __('Last fired');
	$table->head[5] = __('Times Fired');
	
	$alerts = get_agent_alerts ($id_agent);
	/* FIXME: Add compound alerts to the report. Some extra code is needed here */
	foreach ($alerts['simple'] as $alert) {
		$fires = get_alert_fires_in_period ($alert['id'], $period, $date);
		if (! $fires) {
			continue;
		}
		
		$template = get_alert_template ($alert['id_alert_template']);
		$data = array ();
		$data[0] = get_alert_templates_type_name ($template['type']);
		$data[1] = $template['name'];
		
		switch ($template['type']) {
		case 'regex':
			if ($template['matches_value'])
				$data[2] = '&#8771; "'.$template['value'].'"';
			else
				$data[2] = '&#8772; "'.$template['value'].'"';
			break;
		case 'equal':
		case 'not_equal':
			$data[2] = $template['value'];
			
			break;
		case 'max-min':
			$data[2] = __('Min.').': '.$template['min_value']. ' ';
			$data[2] .= __('Max.').': '.$template['max_value']. ' ';
			
			break;
		case 'max':
			$data[2] = $template['max_value'];
			
			break;
		case 'min':
			$data[2] = $template['min_value'];
			
			break;
		}
		$data[3] = $template['time_threshold'];
		$data[4] = print_timestamp (get_alert_last_fire_timestamp_in_period ($alert['id'], $period, $date), true);
		$data[5] = $fires;
		
		array_push ($table->data, $data);
	}
	return $table;
}

/** 
 * Get a report of monitors in an agent.
 * 
 * @param int Agent id to get the report
 * @param int Period of time of the report.
 * @param int Beginning date of the report in UNIX time (current date by default).
 * 
 * @return object A table object with the report.
 */
function get_agent_monitors_reporting_table ($id_agent, $period = 0, $date = 0) {
	$n_a_string = __('N/A').'(*)';
	$table->head = array ();
	$table->head[0] = __('Monitor');
	$table->head[1] = __('Last failure');
	$table->data = array ();
	$monitors = get_monitors_in_agent ($id_agent);
	
	if ($monitors === false) {
		return $table;
	}
	foreach ($monitors as $monitor) {
		$downs = get_monitor_downs_in_period ($monitor['id_agente_modulo'], $period, $date);
		if (! $downs) {
			continue;
		}
		$data = array ();
		if ($monitor['descripcion'] != $n_a_string && $monitor['descripcion'] != '')
			$data[0] = $monitor['descripcion'];
		else
			$data[0] = $monitor['nombre'];
		$data[1] = get_monitor_last_down_timestamp_in_period ($monitor['id_agente_modulo'], $period, $date);
		array_push ($table->data, $data);
	}
	
	return $table;
}

/** 
 * Get a report of all the modules in an agent.
 * 
 * @param int Agent id to get the report.
 * @param int Period of time of the report
 * @param int Beginning date of the report in UNIX time (current date by default).
 * 
 * @return object
 */
function get_agent_modules_reporting_table ($id_agent, $period = 0, $date = 0) {
	$table->data = array ();
	$n_a_string = __('N/A').'(*)';
	$modules = get_agent_modules ($id_agent, array ("nombre", "descripcion"));
	if ($modules === false)
		$modules = array();
	$data = array ();
	
	foreach ($modules as $module) {
		if ($module['descripcion'] != $n_a_string && $module['descripcion'] != '')
			$data[0] = $module['descripcion'];
		else
			$data[0] = $module['nombre'];
		array_push ($table->data, $data);
	}
	
	return $table;
}

/**
 * Get a detailed report of an agent
 *
 * @param int Agent to get the report.
 * @param int Period of time of the desired report.
 * @param int Beginning date of the report in UNIX time (current date by default).
 * @param bool Flag to return or echo the report (by default).
 *
 * @return string
 */
function get_agent_detailed_reporting ($id_agent, $period = 0, $date = 0, $return = false) {
	$output = '';
	$n_a_string = __('N/A').'(*)';
	
	/* Show modules in agent */
	$output .= '<div class="agent_reporting">';
	$output .= '<h3 style="text-decoration: underline">'.__('Agent').' - '.get_agent_name ($id_agent).'</h3>';
	$output .= '<h4>'.__('Modules').'</h3>';
	$table_modules = get_agent_modules_reporting_table ($id_agent, $period, $date);
	$table_modules->width = '99%';
	$output .= print_table ($table_modules, true);
	
	/* Show alerts in agent */
	$table_alerts = get_agent_alerts_reporting_table ($id_agent, $period, $date);
	$table_alerts->width = '99%';
	if (sizeof ($table_alerts->data)) {
		$output .= '<h4>'.__('Alerts').'</h4>';
		$output .= print_table ($table_alerts, true);
	}
	
	/* Show monitor status in agent (if any) */
	$table_monitors = get_agent_monitors_reporting_table ($id_agent, $period, $date);
	if (sizeof ($table_monitors->data) == 0) {
		$output .= '</div>';
		if (! $return)
			echo $output;
		return $output;
	}
	$table_monitors->width = '99%';
	$table_monitors->align = array ();
	$table_monitors->align[1] = 'right';
	$table_monitors->size = array ();
	$table_monitors->align[1] = '10%';
	$output .= '<h4>'.__('Monitors').'</h4>';
	$output .= print_table ($table_monitors, true);
	
	$output .= '</div>';
	
	if (! $return)
		echo $output;
	return $output;
}

/**
 * Get a detailed report of agents in a group.
 *
 * @param int Group to get the report
 * @param int Period
 * @param int Timestamp to start from
 * @param bool Flag to return or echo the report (by default).
 *
 * @return string
 */
function get_agents_detailed_reporting ($id_group, $period = 0, $date = 0, $return = false) {
	$agents = get_group_agents ($id_group, false, "none");
	
	$output = '';
	foreach ($agents as $agent_id => $agent_name) {
		$output .= get_agent_detailed_reporting ($agent_id, $period, $date, true);
	}
	
	if ($return === false)
		echo $output;
		
	return $output;
}

?>