<?php
function get_hosts(array $params = []) : mixed {
	$sql = 'SELECT id as host_id, description as host_description, hostname, host_template_id,
        poller_id, site_id, disabled, status, status_fail_date AS last_fail_date,
        status_rec_date AS last_recovery_date, status_last_error AS last_error,
        availability, polling_time, total_polls, failed_polls, snmp_sysDescr AS snmp_description,
        snmp_sysUpTimeInstance AS snmp_uptime, snmp_sysLocation AS snmp_location, last_updated
        FROM host';

	$conditions = [];
	$values     = [];

	if (isset($params['host_id']) && $params['host_id'] !== '') {
		if (!is_array($params['host_id'])) {
			$params['host_id'] = explode(',', $params['host_id']);
		}

		$params['host_id'] = array_map('trim', $params['host_id']);
		$params['host_id'] = array_filter($params['host_id'], fn ($v) => $v !== '');

		if (!empty($params['host_id'])) {
			$placeholders = implode(',', array_fill(0, count($params['host_id']), '?'));
			$conditions[] = "id IN ($placeholders)";
			$values       = array_merge($values, $params['host_id']);
		}
	}

	if (isset($params['poller_id']) && $params['poller_id'] !== '') {
		if (!is_array($params['poller_id'])) {
			$params['poller_id'] = explode(',', $params['poller_id']);
		}

		$params['poller_id'] = array_map('trim', $params['poller_id']);
		$params['poller_id'] = array_filter($params['poller_id'], fn ($v) => $v !== '');

		if (!empty($params['poller_id'])) {
			$placeholders = implode(',', array_fill(0, count($params['poller_id']), '?'));
			$conditions[] = "poller_id IN ($placeholders)";
			$values       = array_merge($values, $params['poller_id']);
		}
	}

	if (isset($params['site_id']) && $params['site_id'] !== '') {
		if (!is_array($params['site_id'])) {
			$params['site_id'] = explode(',', $params['site_id']);
		}
		$params['site_id'] = array_map('trim', $params['site_id']);
		$params['site_id'] = array_filter($params['site_id'], fn ($v) => $v !== '');

		if (!empty($params['site_id'])) {
			$placeholders = implode(',', array_fill(0, count($params['site_id']), '?'));
			$conditions[] = "site_id IN ($placeholders)";
			$values       = array_merge($values, $params['site_id']);
		}
	}

	if (isset($params['template_id']) && $params['template_id'] !== '') {
		if (!is_array($params['template_id'])) {
			$params['template_id'] = explode(',', $params['template_id']);
		}

		$params['template_id'] = array_map('trim', $params['template_id']);
		$params['template_id'] = array_filter($params['template_id'], fn ($v) => $v !== '');

		if (!empty($params['template_id'])) {
			$placeholders = implode(',', array_fill(0, count($params['template_id']), '?'));
			$conditions[] = "host_template_id IN ($placeholders)";
			$values       = array_merge($values, $params['template_id']);
		}
	}

	if (isset($params['status'])) {
		$conditions[] = 'status = ?';
		$values[]     = $params['status'];
	}

	if (isset($params['snmp_location'])) {
		$conditions[] = 'snmp_sysLocation LIKE ?';
		$values[]     = '%' . $params['snmp_location'] . '%';
	}

	if (isset($params['hostname']) && $params['hostname'] !== '') {
		$conditions[] = 'hostname LIKE ?';
		$values[]     = '%' . $params['hostname'] . '%';
	}

	if (isset($params['description']) && $params['description'] !== '') {
		$conditions[] = 'description LIKE ?';
		$values[]     = '%' . $params['description'] . '%';
	}

	// Apply WHERE clause if needed
	if (!empty($conditions)) {
		$sql .= ' WHERE ' . implode(' AND ', $conditions);
	}

	return $values ? db_fetch_assoc_prepared($sql, $values) : db_fetch_assoc($sql);
}

/**
 * Retrieves a list of graphs associated with a specific host.
 *
 * This function queries the database to fetch graph details for a given host ID.
 * It returns an array of graphs, each containing the host ID, graph ID, and RRD name.
 *
 * @param int $host_id The ID of the host for which to retrieve the graph list. Defaults to 0.
 *
 * @return array An associative array with the key "graphs" containing a list of graphs.
 *               Each graph is represented as an associative array with the following keys:
 *               - "host_id" (int): The ID of the host.
 *               - "graph_id" (int): The ID of the graph.
 *               - "rrd_name" (string): The name of the RRD file.
 */
function get_graph_list(int $host_id = 0) : array {
	if (filter_var($host_id, FILTER_VALIDATE_INT) === false || $host_id < 0) {
		return ['graphs' => ['Host must be a valid INT']];
	}

	$sql = "SELECT DISTINCT h.id as host_id, dl.id as graph_id, dtd.name_cache as rrd_name, pi.rrd_name as rrd_path
        FROM poller_item AS pi
        INNER JOIN data_local AS dl
        ON dl.id = pi.local_data_id
        INNER JOIN data_template_data AS dtd
        ON dtd.local_data_id = pi.local_data_id
        INNER JOIN host AS h
        ON pi.host_id = h.id
        WHERE rrd_name != ''
        AND h.id = ?";

	$rows   = db_fetch_assoc_prepared($sql, [$host_id]);
	$graphs = [];

	if (is_array($rows)) {
		foreach ($rows as $row) {
			$graphs[] = [
				'host_id'  => $row['host_id'],
				'graph_id' => $row['graph_id'],
				'rrd_name' => $row['rrd_name']
			];
		}
	}

	return ['graphs' => $graphs];
}

function get_poller_status(int $poller_id = 0) : mixed {
	if (filter_var($poller_id, FILTER_VALIDATE_INT) === false || $poller_id < 0) {
		return ['error' => 'Poller ID must be a valid INT'];
	}

	$sql = 'SELECT id, name, disabled, status, hostname, total_time, max_time,
        min_time, avg_time, total_polls, processes, threads, last_update, last_status
        FROM poller';

	$values = [];

	if ($poller_id > 0) {
		$sql .= ' WHERE id = ?';
		$values[] = $poller_id;
	}

	return $values ? db_fetch_assoc_prepared($sql, $values) : db_fetch_assoc($sql);
}

function get_host_templates(int $template_id = 0) : mixed {
	if (filter_var($template_id, FILTER_VALIDATE_INT) === false || $template_id < 0) {
		return ['templates' => ['Template ID must be a valid INT']];
	}

	$sql    = 'SELECT id,name,class FROM host_template';
	$values = [];

	if ($template_id > 0) {
		$sql .= ' WHERE id = ?';
		$values[] = $template_id;
	}

	return $values ? db_fetch_assoc_prepared($sql, $values) : db_fetch_assoc($sql);
}

function get_cacti_status() : array {
	// Get Cacti version
	$cacti_version  = db_fetch_cell('SELECT cacti AS version FROM version LIMIT 1');
	$poller_type    = read_config_option('poller_type');
	$poller_enabled = read_config_option('poller_enabled');
	$total_hosts    = db_fetch_cell('SELECT COUNT(*) as count FROM host');

	$total_data_sources = db_fetch_cell('SELECT COUNT(*) as count FROM data_local');
	$poller_output_size = db_fetch_cell('SELECT COUNT(*) as count FROM poller_output');
	$boost_table_size   = db_fetch_cell('SELECT COUNT(*) as count FROM poller_output_boost');

	if ($poller_enabled === 'on') {
		$poller_enabled = 'Global Polling is enabled';
	} else {
		$poller_enabled = 'Global polling is disabled';
	}

	$poller_type = ($poller_type === '2') ? 'Spine' : (($poller_type === '1') ? 'cmd.php' : $poller_type);

	// Get installed plugins
	$plugins = db_fetch_assoc('SELECT name, status, version FROM plugin_config');

	$installed_plugins = [];

	if (is_array($plugins)) {
		foreach ($plugins as $plugin) {
			$status = ($plugin['status'] == 1) ? 'enabled' : 'disabled';

			$installed_plugins[] = [
				'name'    => $plugin['name'],
				'status'  => $status,
				'version' => $plugin['version']
			];
		}
	}

	$cacti_status = [
		[
			'cacti_version'      => $cacti_version,
			'poller_type'        => $poller_type,
			'poller_enabled'     => $poller_enabled,
			'total_hosts'        => $total_hosts,
			'poller_output_size' => $poller_output_size,
			'boost_table_size'   => $boost_table_size,
			'total_data_sources' => $total_data_sources,
			'installed_plugins'  => $installed_plugins
		]
	];

	return ['cacti_status' => $cacti_status];
}

function get_boost_status() : array {
	$boost_rrd_update_enable = read_config_option('boost_rrd_update_enable');

	if ($boost_rrd_update_enable !== 'on') {
		return ['boost_rrd_update_enable' => 'Boost is disabled'];
	}

	$boost_last_end_time   = read_config_option('boost_last_end_time');
	$boost_last_start_time = read_config_option('boost_last_start_time');
	$boost_next_run_time   = read_config_option('boost_next_run_time');
	$stats_detail_boost    = read_config_option('stats_detail_boost');
	$total_boost_records   = db_fetch_cell('SELECT COUNT(*) as count FROM poller_output_boost');

	$boost_status = [
		'boost_rrd_update_enable' => $boost_rrd_update_enable,
		'boost_last_end_time'     => $boost_last_end_time,
		'boost_last_start_time'   => $boost_last_start_time,
		'boost_next_run_time'     => $boost_next_run_time,
		'stats_detail_boost'      => $stats_detail_boost,
		'total_boost_records'     => $total_boost_records
	];

	return ['boost_status' => $boost_status];
}

function get_dsstats_status() : array {
	$check_dsstats_enabled = read_config_option('dsstats_enable');

	if ($check_dsstats_enabled !== 'on') {
		return ['dsstats_status' => 'Data Source Statistics is disabled'];
	}

	$dsstats_status = [
		'dsstats_poller_memory_limit' => read_config_option('dsstats_poller_mem_limit'),
		'dsstats_timeout'             => read_config_option('dsstats_timeout'),
		'dsstats_parallel_processes'  => read_config_option('dsstats_parallel'),
		'dsstats_mode'                => (read_config_option('dsstats_mode') == 0 ? 'Peak/Average Only' : 'All Metrics'),
		'dsstats_hourly_duration'     => read_config_option('dsstats_hourly_duration'),
		'dsstats_daily_interval'      => read_config_option('dsstats_daily_interval'),
		'dsstats_weekly_retention'    => read_config_option('dsstats_weekly_retention'),
		'dsstats_monthly_retention'   => read_config_option('dsstats_monthly_retention'),
		'dsstats_yearly_retention'    => read_config_option('dsstats_yearly_retention'),
		'dsstats_last_run_time'       => read_config_option('dsstats_last_major_run_time'),
		'dsstats_peak'                => read_config_option('dsstats_peak'),
	];

	return ['dsstats_status' => $dsstats_status];
}

function get_cacti_db_status() : array {
	$status_rows  = db_fetch_assoc('SHOW STATUS');
	$status_assoc = [];

	foreach ($status_rows as $row) {
		if (isset($row['Variable_name']) && isset($row['Value'])) {
			$status_assoc[$row['Variable_name']] = $row['Value'];
		}
	}

	$db_status = [
		'max_used_connections'           => $status_assoc['Max_used_connections'] ?? 0,
		'threads_connected'              => $status_assoc['Threads_connected'] ?? 0,
		'threads_running'                => $status_assoc['Threads_running'] ?? 0,
		'Aborted_clients'                => $status_assoc['Aborted_clients'] ?? 0,
		'Aborted_connects'               => $status_assoc['Aborted_connects'] ?? 0,
		'Uptime'                         => $status_assoc['Uptime'] ?? 0,
		'innodb_buffer_pool_size'        => $status_assoc['Innodb_buffer_pool_size'] ?? 0,
		'innodb_buffer_pool_pages_total' => $status_assoc['Innodb_buffer_pool_pages_total'] ?? 0,
		'innodb_buffer_pool_pages_free'  => $status_assoc['Innodb_buffer_pool_pages_free'] ?? 0,
		'innodb_buffer_pool_pages_data'  => $status_assoc['Innodb_buffer_pool_pages_data'] ?? 0,
		'innodb_buffer_pool_pages_dirty' => $status_assoc['Innodb_buffer_pool_pages_dirty'] ?? 0
	];

	return ['db_status' => $db_status];
}

function get_thresholds(array $params = []) : array {
	$check_thold_installed = db_fetch_assoc("SHOW TABLES LIKE 'thold_data'");

	if (empty($check_thold_installed)) {
		return ['thold_status' => 'Thresholds plugin is not installed'];
	}

	$sql = 'SELECT h.id as HOST_ID, description AS HOST_DESCRIPTION, h.hostname, data_source_name, thold_hi, thold_low, lastread, lastchanged, thold_fail_count, thold_enabled
        FROM thold_data td
        INNER JOIN host h
        ON td.host_id = h.id';

	$conditions = [];
	$values     = [];

	if (isset($params['host_id']) && $params['host_id'] !== '') {
		if (!is_array($params['host_id'])) {
			$params['host_id'] = explode(',', $params['host_id']);
		}

		$params['host_id'] = array_map('trim', $params['host_id']);
		$params['host_id'] = array_filter($params['host_id'], fn ($v) => $v !== '');

		if (!empty($params['host_id'])) {
			$placeholders = implode(',', array_fill(0, count($params['host_id']), '?'));
			$conditions[] = "h.id IN ($placeholders)";
			$values       = array_merge($values, $params['host_id']);
		}
	}

	if (isset($params['host_description'])) {
		$conditions[] = 'h.description LIKE ?';
		$values[]     = '%' . $params['host_description'] . '%';
	}

	if (isset($params['hostname'])) {
		$conditions[] = 'h.hostname LIKE ?';
		$values[]     = '%' . $params['hostname'] . '%';
	}

	if (isset($params['data_source_name'])) {
		$conditions[] = 'td.data_source_name LIKE ?';
		$values[]     = '%' . $params['data_source_name'] . '%';
	}

	if (isset($params['template_id']) && $params['template_id'] !== '') {
		if (!is_array($params['template_id'])) {
			$params['template_id'] = explode(',', $params['template_id']);
		}

		$params['template_id'] = array_map('trim', $params['template_id']);
		$params['template_id'] = array_filter($params['template_id'], fn ($v) => $v !== '');

		if (!empty($params['template_id'])) {
			$placeholders = implode(',', array_fill(0, count($params['template_id']), '?'));
			$conditions[] = "host_template_id IN ($placeholders)";
			$values       = array_merge($values, $params['template_id']);
		}
	}

	if (!empty($conditions)) {
		$sql .= ' WHERE ' . implode(' AND ', $conditions);
	}

	$rows       = $values ? db_fetch_assoc_prepared($sql, $values) : db_fetch_assoc($sql);
	$thresholds = [];

	if (is_array($rows)) {
		foreach ($rows as $row) {
			$thresholds[] = [
				'host_id'          => $row['HOST_ID'],
				'host_description' => $row['HOST_DESCRIPTION'],
				'hostname'         => $row['hostname'],
				'data_source_name' => $row['data_source_name'],
				'thold_hi'         => $row['thold_hi'],
				'thold_low'        => $row['thold_low'],
				'lastread'         => $row['lastread'],
				'lastchanged'      => $row['lastchanged'],
				'thold_fail_count' => $row['thold_fail_count'],
				'thold_enabled'    => $row['thold_enabled']
			];
		}
	}

	return ['thresholds' => $thresholds];
}

function get_threshold_status() : array {
	$check_thold_installed = db_fetch_assoc("SHOW TABLES LIKE 'thold_data'");

	if (empty($check_thold_installed)) {
		return ['thold_status' => 'Thresholds plugin is not installed'];
	}

	$check_daemon_enabled = read_config_option('thold_daemon_enable');

	$daemon_status = [];

	if (empty($check_daemon_enabled)) {
		$daemon_status = ['thold_status' => 'Thold daemon is not enabled'];
	} else {
		$daemon_status = [
			'thold_daemon_dead_notification' => read_config_option('thold_daemon_dead_notification'),
			'thold_daemon_debug'             => (read_config_option('thold_daemon_debug') === 'on') ? 'enabled' : 'disabled',
			'thold_daemon_down_notify_time'  => read_config_option('thold_daemon_down_notify_time'),
			'thold_daemon_enable'            => ($check_daemon_enabled === 'on') ? 'enabled' : 'disabled'
		];
	}

	$poller_stats        = read_config_option('stats_thold');
	$total_thresholds    = db_fetch_cell('SELECT COUNT(*) as cnt FROM thold_data') ?? 0;
	$enabled_thresholds  = db_fetch_cell('SELECT COUNT(*) as cnt FROM thold_data WHERE thold_enabled = 1') ?? 0;
	$disabled_thresholds = db_fetch_cell('SELECT COUNT(*) as cnt FROM thold_data WHERE thold_enabled = 0') ?? 0;

	return [
		'thold_status' => [
			'daemon'              => $daemon_status,
			'poller_stats'        => $poller_stats,
			'total_thresholds'    => $total_thresholds,
			'enabled_thresholds'  => $enabled_thresholds,
			'disabled_thresholds' => $disabled_thresholds
		]
	];
}

// automation functions
function get_automation_networks(array $params = []) : mixed {
	$sql = 'SELECT id, poller_id, name, subnet_range, ignore_ips, dns_servers, enabled,
        notification_email, up_hosts, snmp_hosts, ping_method, ping_timeout, ping_retries,
        start_at, next_start, last_runtime, last_started, last_status
        FROM automation_networks';

	$conditions = [];
	$values     = [];

	if (isset($params['network_id']) && $params['network_id'] !== '') {
		if (!is_array($params['network_id'])) {
			$params['network_id'] = explode(',', $params['network_id']);
		}

		$params['network_id'] = array_map('trim', $params['network_id']);
		$params['network_id'] = array_filter($params['network_id'], fn ($v) => $v !== '');

		if (!empty($params['network_id'])) {
			$placeholders = implode(',', array_fill(0, count($params['network_id']), '?'));
			$conditions[] = "id IN ($placeholders)";
			$values       = array_merge($values, $params['network_id']);
		}
	}

	if (isset($params['network_name']) && $params['network_name'] !== '') {
		$conditions[] = 'name LIKE ?';
		$values[]     = '%' . $params['network_name'] . '%';
	}

	if (isset($params['subnet_range']) && $params['subnet_range'] !== '') {
		$conditions[] = 'subnet_range LIKE ?';
		$values[]     = '%' . $params['subnet_range'] . '%';
	}

	if (!empty($conditions)) {
		$sql .= ' WHERE ' . implode(' AND ', $conditions);
	}

	// Use prepared variant when values exist (placeholders present)
	if (!empty($values)) {
		return db_fetch_assoc_prepared($sql, $values);
	}

	return db_fetch_assoc($sql);
}

function get_automation_status() : array {
	$sql = 'SELECT DISTINCT ap.network_id, an.name, an.subnet_range, an.last_started
        FROM automation_processes ap
        INNER JOIN automation_networks an ON ap.network_id = an.id';

	$rows = db_fetch_assoc($sql);

	$automation_status = [];

	if (is_array($rows)) {
		foreach ($rows as $row) {
			$automation_status[] = [
				'network_id'   => $row['network_id'],
				'network_name' => $row['name'],
				'subnet_range' => $row['subnet_range'],
				'last_started' => $row['last_started']
			];
		}
	}

	return ['running_automations' => $automation_status];
}