<?php
/*
* 2007-2016 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Academic Free License (AFL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/afl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2016 PrestaShop SA
*  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

if (!defined('_PS_VERSION_'))
	exit;

class Followup extends Module
{
	public function __construct()
	{
		$this->name = 'followup';
		$this->tab = 'advertising_marketing';
		$this->version = '1.7.1';
		$this->author = 'PrestaShop';
		$this->need_instance = 0;

		$this->conf_keys = array(
			'PS_FOLLOW_UP_ENABLE_1',
			'PS_FOLLOW_UP_ENABLE_2',
			'PS_FOLLOW_UP_ENABLE_3',
			'PS_FOLLOW_UP_ENABLE_4',
			'PS_FOLLOW_UP_AMOUNT_1',
			'PS_FOLLOW_UP_AMOUNT_2',
			'PS_FOLLOW_UP_AMOUNT_3',
			'PS_FOLLOW_UP_AMOUNT_4',
			'PS_FOLLOW_UP_DAYS_1',
			'PS_FOLLOW_UP_DAYS_2',
			'PS_FOLLOW_UP_DAYS_3',
			'PS_FOLLOW_UP_DAYS_4',
			'PS_FOLLOW_UP_THRESHOLD_3',
			'PS_FOLLOW_UP_DAYS_THRESHOLD_4',
			'PS_FOLLOW_UP_CLEAN_DB'
		);

		$this->bootstrap = true;
		parent::__construct();

		$secure_key = Configuration::get('PS_FOLLOWUP_SECURE_KEY');
		if($secure_key === false)
			Configuration::updateValue('PS_FOLLOWUP_SECURE_KEY', Tools::strtoupper(Tools::passwdGen(16)));

		$this->displayName = $this->l('Customer follow-up');
		$this->description = $this->l('Follow-up with your customers with daily customized e-mails.');
		$this->confirmUninstall = $this->l('Are you sure you want to delete all settings and your logs?');
	}

	public function install()
	{
		Db::getInstance()->execute('
		CREATE TABLE '._DB_PREFIX_.'log_email (
		`id_log_email` INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY ,
		`id_email_type` INT UNSIGNED NOT NULL ,
		`id_cart_rule` INT UNSIGNED NOT NULL ,
		`id_customer` INT UNSIGNED NULL ,
		`id_cart` INT UNSIGNED NULL ,
		`date_add` DATETIME NOT NULL,
		 INDEX `date_add`(`date_add`),
		 INDEX `id_cart`(`id_cart`)
		) ENGINE='._MYSQL_ENGINE_);

		foreach ($this->conf_keys as $key)
			Configuration::updateValue($key, 0);


		return parent::install();
	}

	public function uninstall()
	{
		foreach ($this->conf_keys as $key)
			Configuration::deleteByName($key);

		Configuration::deleteByName('PS_FOLLOWUP_SECURE_KEY');

		Db::getInstance()->execute('DROP TABLE '._DB_PREFIX_.'log_email');

		return parent::uninstall();
	}

	public function getContent()
	{
		$html = '';
		/* Save settings */
		if (Tools::isSubmit('submitFollowUp'))
		{
			$ok = true;
			foreach ($this->conf_keys as $c)
				if(Tools::getValue($c) !== false) // Prevent saving when URL is wrong
					$ok &= Configuration::updateValue($c, (float)Tools::getValue($c));
			if ($ok)
				$html .= $this->displayConfirmation($this->l('Settings updated succesfully'));
			else
				$html .= $this->displayError($this->l('Error occurred during settings update'));
		}
		$html .= $this->renderForm();
		$html .= $this->renderStats();

		return $html;
	}

	/* Log each sent e-mail */
	private function logEmail($id_email_type, $id_cart_rule, $id_customer = null, $id_cart = null)
	{
		$values = array(
			'id_email_type' => (int)$id_email_type,
			'id_cart_rule' => (int)$id_cart_rule,
			'date_add' => date('Y-m-d H:i:s')
		);
		if (!empty($id_cart))
			$values['id_cart'] = (int)$id_cart;
		if (!empty($id_customer))
			$values['id_customer'] = (int)$id_customer;
		Db::getInstance()->insert('log_email', $values);
	}

	/* Each cart which wasn't transformed into an order */
	private function cancelledCart($count = false)
	{
		$email_logs = $this->getLogsEmail(1);
		$sql = '
		SELECT c.id_cart, c.id_lang, cu.id_customer, c.id_shop, cu.firstname, cu.lastname, cu.email
		FROM '._DB_PREFIX_.'cart c
		LEFT JOIN '._DB_PREFIX_.'orders o ON (o.id_cart = c.id_cart)
		RIGHT JOIN '._DB_PREFIX_.'customer cu ON (cu.id_customer = c.id_customer)
		WHERE DATE_SUB(CURDATE(),INTERVAL 7 DAY) <= c.date_add AND o.id_order IS NULL';

		$sql .= Shop::addSqlRestriction(Shop::SHARE_CUSTOMER, 'c');

		if (!empty($email_logs))
			$sql .= ' AND c.id_cart NOT IN ('.join(',', $email_logs).')';

		$sql .= ' GROUP BY cu.id_customer';

		$emails = Db::getInstance()->executeS($sql);

		if ($count || !count($emails))
			return count($emails);

		$conf = Configuration::getMultiple(array('PS_FOLLOW_UP_AMOUNT_1', 'PS_FOLLOW_UP_DAYS_1'));
		foreach ($emails as $email)
		{
			$voucher = $this->createDiscount(1, (float)$conf['PS_FOLLOW_UP_AMOUNT_1'], (int)$email['id_customer'], strftime('%Y-%m-%d', strtotime('+'.(int)$conf['PS_FOLLOW_UP_DAYS_1'].' day')), $this->l('Discount for your cancelled cart'));
			if ($voucher !== false)
			{
				$template_vars = array(
					'{email}' => $email['email'],
					'{lastname}' => $email['lastname'],
					'{firstname}' => $email['firstname'],
					'{amount}' => $conf['PS_FOLLOW_UP_AMOUNT_1'],
					'{days}' => $conf['PS_FOLLOW_UP_DAYS_1'],
					'{voucher_num}' => $voucher->code
				);
				Mail::Send((int)$email['id_lang'], 'followup_1', Mail::l('Your cart and your discount', (int)$email['id_lang']), $template_vars, $email['email'], $email['firstname'].' '.$email['lastname'], null, null, null, null, dirname(__FILE__).'/mails/');
				$this->logEmail(1, (int)$voucher->id, (int)$email['id_customer'], (int)$email['id_cart']);
			}
		}
	}

	private function getLogsEmail($email_type)
	{
		static $id_list = array(
			'1' => array(),
			'2' => array(),
			'3' => array(),
			'4' => array(),
		);
		static $executed = false;

		if (!$executed)
		{
			$query = '
			SELECT id_cart, id_customer, id_email_type FROM '._DB_PREFIX_.'log_email
			WHERE id_email_type <> 4 OR date_add >= DATE_SUB(date_add,INTERVAL '.(int)Configuration::get('PS_FOLLOW_UP_DAYS_THRESHOLD_4').' DAY)';
			$results = Db::getInstance()->executeS($query);
			foreach ($results as $line)
			{
				switch ($line['id_email_type'])
				{
					case 1:
						$id_list['1'][] = $line['id_cart'];
						break;
					case 2:
						$id_list['2'][] = $line['id_cart'];
						break;
					case 3:
						$id_list['3'][] = $line['id_customer'];
						break;
					case 4:
						$id_list['4'][] = $line['id_customer'];
						break;
				}
			}
			$executed = true;
		}

		return $id_list[$email_type];
	}

	/* For all validated orders, a discount if re-ordering before x days */
	private function reOrder($count = false)
	{
		$email_logs = $this->getLogsEmail(2);
		$sql = '
		SELECT o.id_order, c.id_cart, o.id_lang, o.id_shop, cu.id_customer, cu.firstname, cu.lastname, cu.email
		FROM '._DB_PREFIX_.'orders o
		LEFT JOIN '._DB_PREFIX_.'customer cu ON (cu.id_customer = o.id_customer)
		LEFT JOIN '._DB_PREFIX_.'cart c ON (c.id_cart = o.id_cart)
			WHERE o.valid = 1
			AND c.date_add >= DATE_SUB(CURDATE(),INTERVAL 7 DAY)
			AND cu.is_guest = 0';

		$sql .= Shop::addSqlRestriction(Shop::SHARE_CUSTOMER, 'o');

		if (!empty($email_logs))
			$sql .= ' AND o.id_cart NOT IN ('.join(',', $email_logs).')';

		$emails = Db::getInstance()->executeS($sql);

		if ($count || !count($emails))
			return count($emails);

		$conf = Configuration::getMultiple(array('PS_FOLLOW_UP_AMOUNT_2', 'PS_FOLLOW_UP_DAYS_2'));
		foreach ($emails as $email)
		{
			$voucher = $this->createDiscount(2, (float)$conf['PS_FOLLOW_UP_AMOUNT_2'], (int)$email['id_customer'], strftime('%Y-%m-%d', strtotime('+'.(int)$conf['PS_FOLLOW_UP_DAYS_2'].' day')), $this->l('Thank you for your order.'));
			if ($voucher !== false)
			{
				$template_vars = array(
					'{email}' => $email['email'],
					'{lastname}' => $email['lastname'],
					'{firstname}' => $email['firstname'],
					'{amount}' => $conf['PS_FOLLOW_UP_AMOUNT_2'],
					'{days}' => $conf['PS_FOLLOW_UP_DAYS_2'],
					'{voucher_num}' => $voucher->code
				);
				Mail::Send((int)$email['id_lang'], 'followup_2', Mail::l('Thanks for your order', (int)$email['id_lang']), $template_vars, $email['email'], $email['firstname'].' '.$email['lastname'], null, null, null, null, dirname(__FILE__).'/mails/');
				$this->logEmail(2, (int)$voucher->id, (int)$email['id_customer'], (int)$email['id_cart']);
			}
		}
	}

	/* For all customers with more than x euros in 90 days */
	private function bestCustomer($count = false)
	{
		$email_logs = $this->getLogsEmail(3);

		$sql = '
		SELECT SUM(o.total_paid) total, c.id_cart, o.id_lang, cu.id_customer, cu.id_shop, cu.firstname, cu.lastname, cu.email
		FROM '._DB_PREFIX_.'orders o
		LEFT JOIN '._DB_PREFIX_.'customer cu ON (cu.id_customer = o.id_customer)
		LEFT JOIN '._DB_PREFIX_.'cart c ON (c.id_cart = o.id_cart)
			WHERE o.valid = 1
			AND DATE_SUB(CURDATE(),INTERVAL 90 DAY) <= o.date_add
			AND cu.is_guest = 0 ';

		$sql .= Shop::addSqlRestriction(Shop::SHARE_CUSTOMER, 'o');

		if (!empty($email_logs))
			$sql .= ' AND cu.id_customer NOT IN ('.join(',', $email_logs).') ';

		$sql .= '
		GROUP BY o.id_customer
			HAVING total >= '.(float)Configuration::get('PS_FOLLOW_UP_THRESHOLD_3');

		$emails = Db::getInstance()->executeS($sql);

		if ($count || !count($emails))
			return count($emails);

		$conf = Configuration::getMultiple(array('PS_FOLLOW_UP_AMOUNT_3', 'PS_FOLLOW_UP_DAYS_3'));
		foreach ($emails as $email)
		{
			$voucher = $this->createDiscount(3, (float)$conf['PS_FOLLOW_UP_AMOUNT_3'], (int)$email['id_customer'], strftime('%Y-%m-%d', strtotime('+'.(int)$conf['PS_FOLLOW_UP_DAYS_3'].' day')), $this->l('You are one of our best customers!'));
			if ($voucher !== false)
			{
				$template_vars = array(
					'{email}' => $email['email'],
					'{lastname}' => $email['lastname'],
					'{firstname}' => $email['firstname'],
					'{amount}' => $conf['PS_FOLLOW_UP_AMOUNT_3'],
					'{days}' => $conf['PS_FOLLOW_UP_DAYS_3'],
					'{voucher_num}' => $voucher->code
				);
				Mail::Send((int)$email['id_lang'], 'followup_3', Mail::l('You are one of our best customers', (int)$email['id_lang']), $template_vars, $email['email'], $email['firstname'].' '.$email['lastname'], null, null, null, null, dirname(__FILE__).'/mails/');
				$this->logEmail(3, (int)$voucher->id, (int)$email['id_customer'], (int)$email['id_cart']);
			}
		}
	}

	/* For all customers with no orders since more than x days */

	/**
	 * badCustomer send mails to all customers with no orders since more than x days,
	 * with at least one valid order in history
	 *
	 * @param boolean $count if set to true, will return number of customer (default : false, will send mails, no return value)
	 *
	 * @return void
	 */
	private function badCustomer($count = false)
	{
		$email_logs = $this->getLogsEmail(4);
		$sql = '
			SELECT o.id_lang, c.id_cart, cu.id_customer, cu.id_shop, cu.firstname, cu.lastname, cu.email, (SELECT COUNT(o.id_order) FROM '._DB_PREFIX_.'orders o WHERE o.id_customer = cu.id_customer and o.valid = 1) nb_orders
			FROM '._DB_PREFIX_.'customer cu
			LEFT JOIN '._DB_PREFIX_.'orders o ON (o.id_customer = cu.id_customer)
			LEFT JOIN '._DB_PREFIX_.'cart c ON (c.id_cart = o.id_cart)
				WHERE cu.id_customer NOT IN (SELECT o.id_customer FROM '._DB_PREFIX_.'orders o WHERE DATE_SUB(CURDATE(),INTERVAL '.(int)Configuration::get('PS_FOLLOW_UP_DAYS_THRESHOLD_4').' DAY) <= o.date_add)
				AND cu.is_guest = 0 ';

		$sql .= Shop::addSqlRestriction(Shop::SHARE_CUSTOMER, 'cu');

		if (!empty($email_logs))
			$sql .= ' AND cu.id_customer NOT IN ('.join(',', $email_logs).') ';

		$sql .= ' GROUP BY cu.id_customer HAVING nb_orders >= 1';

		$emails = Db::getInstance()->executeS($sql);

		if ($count || !count($emails))
			return count($emails);

		$conf = Configuration::getMultiple(array('PS_FOLLOW_UP_AMOUNT_4', 'PS_FOLLOW_UP_DAYS_4'));
		foreach ($emails as $email)
		{
			$voucher = $this->createDiscount(4, (float)$conf['PS_FOLLOW_UP_AMOUNT_4'], (int)$email['id_customer'], strftime('%Y-%m-%d', strtotime('+'.(int)$conf['PS_FOLLOW_UP_DAYS_4'].' day')), $this->l('We miss you!'));
			if ($voucher !== false)
			{
				$template_vars = array(
					'{email}' => $email['email'],
					'{lastname}' => $email['lastname'],
					'{firstname}' => $email['firstname'],
					'{amount}' => $conf['PS_FOLLOW_UP_AMOUNT_4'],
					'{days}' => $conf['PS_FOLLOW_UP_DAYS_4'],
					'{days_threshold}' => (int)Configuration::get('PS_FOLLOW_UP_DAYS_THRESHOLD_4'),
					'{voucher_num}' => $voucher->code
				);
				Mail::Send((int)$email['id_lang'], 'followup_4', Mail::l('We miss you', (int)$email['id_lang']), $template_vars, $email['email'], $email['firstname'].' '.$email['lastname'], null, null, null, null, dirname(__FILE__).'/mails/');
				$this->logEmail(4, (int)$voucher->id, (int)$email['id_customer'], (int)$email['id_cart']);
			}
		}
	}

	private function createDiscount($id_email_type, $amount, $id_customer, $date_validity, $description)
	{
		$cart_rule = new CartRule();
		$cart_rule->reduction_percent = (float)$amount;
		$cart_rule->id_customer = (int)$id_customer;
		$cart_rule->date_to = $date_validity;
		$cart_rule->date_from = date('Y-m-d H:i:s');
		$cart_rule->quantity = 1;
		$cart_rule->quantity_per_user = 1;
		$cart_rule->cart_rule_restriction = 1;
		$cart_rule->minimum_amount = 0;

		$languages = Language::getLanguages(true);
		foreach ($languages as $language)
			$cart_rule->name[(int)$language['id_lang']] = $description;

		$code = 'FLW-'.(int)$id_email_type.'-'.Tools::strtoupper(Tools::passwdGen(10));
		$cart_rule->code = $code;
		$cart_rule->active = 1;
		if (!$cart_rule->add())
			return false;

		return $cart_rule;
	}

	public function cronTask()
	{
		Context::getContext()->link = new Link(); //when this is call by cron context is not init
		$conf = Configuration::getMultiple(array(
			'PS_FOLLOW_UP_ENABLE_1',
			'PS_FOLLOW_UP_ENABLE_2',
			'PS_FOLLOW_UP_ENABLE_3',
			'PS_FOLLOW_UP_ENABLE_4',
			'PS_FOLLOW_UP_CLEAN_DB'
		));

		if ($conf['PS_FOLLOW_UP_ENABLE_1'])
			$this->cancelledCart();
		if ($conf['PS_FOLLOW_UP_ENABLE_2'])
			$this->reOrder();
		if ($conf['PS_FOLLOW_UP_ENABLE_3'])
			$this->bestCustomer();
		if ($conf['PS_FOLLOW_UP_ENABLE_4'])
			$this->badCustomer();

		/* Clean-up database by deleting all outdated discounts */
		if ($conf['PS_FOLLOW_UP_CLEAN_DB'] == 1)
		{
			$outdated_discounts = Db::getInstance()->executeS('SELECT id_cart_rule FROM '._DB_PREFIX_.'cart_rule WHERE date_to < NOW() AND code LIKE "FLW-%"');
			foreach ($outdated_discounts as $outdated_discount)
			{
				$cart_rule = new CartRule((int)$outdated_discount['id_cart_rule']);
				if (Validate::isLoadedObject($cart_rule))
					$cart_rule->delete();
			}
		}
	}

	public function renderStats()
	{
		$stats = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
			SELECT DATE_FORMAT(l.date_add, \'%Y-%m-%d\') date_stat, l.id_email_type, COUNT(l.id_log_email) nb,
			(SELECT COUNT(l2.id_cart_rule)
			FROM '._DB_PREFIX_.'log_email l2
			LEFT JOIN '._DB_PREFIX_.'order_cart_rule ocr ON (ocr.id_cart_rule = l2.id_cart_rule)
			LEFT JOIN '._DB_PREFIX_.'orders o ON (o.id_order = ocr.id_order)
			WHERE l2.id_email_type = l.id_email_type AND l2.date_add = l.date_add AND ocr.id_order IS NOT NULL AND o.valid = 1) nb_used
			FROM '._DB_PREFIX_.'log_email l
			WHERE l.date_add >= DATE_SUB(CURDATE(), INTERVAL 30 DAY)
			GROUP BY DATE_FORMAT(l.date_add, \'%Y-%m-%d\'), l.id_email_type');

		$stats_array = array();
		foreach ($stats as $stat)
		{
			$stats_array[$stat['date_stat']][$stat['id_email_type']]['nb'] = (int)$stat['nb'];
			$stats_array[$stat['date_stat']][$stat['id_email_type']]['nb_used'] = (int)$stat['nb_used'];
		}

		foreach ($stats_array as $date_stat => $array)
		{
			$rates = array();
			for ($i = 1; $i != 5; $i++)
				if (isset($stats_array[$date_stat][$i]['nb']) && isset($stats_array[$date_stat][$i]['nb_used']) && $stats_array[$date_stat][$i]['nb_used'] > 0)
					$rates[$i] = number_format(($stats_array[$date_stat][$i]['nb_used'] / $stats_array[$date_stat][$i]['nb']) * 100, 2, '.', '');
			for ($i = 1; $i != 5; $i++)
			{
				$stats_array[$date_stat][$i]['nb'] = isset($stats_array[$date_stat][$i]['nb']) ? (int)$stats_array[$date_stat][$i]['nb'] : 0;
				$stats_array[$date_stat][$i]['nb_used'] = isset($stats_array[$date_stat][$i]['nb_used']) ? (int)$stats_array[$date_stat][$i]['nb_used'] : 0;
				$stats_array[$date_stat][$i]['rate'] = isset($rates[$i]) ? '<b>'.$rates[$i].'</b>' : '0.00';
			}
			ksort($stats_array[$date_stat]);
		}

		$this->context->smarty->assign(array('stats_array' => $stats_array));

		return $this->display(__FILE__, 'stats.tpl');
	}

	public function renderForm()
	{
		$currency = new Currency((int)Configuration::get('PS_CURRENCY_DEFAULT'));

		$n1 = $this->cancelledCart(true);
		$n2 = $this->reOrder(true);
		$n3 = $this->bestCustomer(true);
		$n4 = $this->badCustomer(true);

		$cron_info = '';
		if (Shop::getContext() === Shop::CONTEXT_SHOP)
			$cron_info = $this->l('Define the settings and paste the following URL in the crontab, or call it manually on a daily basis:').'<br />
								<b>'.$this->context->shop->getBaseURL().'modules/followup/cron.php?secure_key='.Configuration::get('PS_FOLLOWUP_SECURE_KEY').'</b></p>';

		$fields_form_1 = array(
			'form' => array(
				'legend' => array(
					'title' => $this->l('Information'),
					'icon' => 'icon-cogs',
				),
				'description' => $this->l('Four kinds of e-mail alerts are available in order to stay in touch with your customers!').'<br />'.$cron_info,
			)
		);

		$fields_form_2 = array(
			'form' => array(
				'legend' => array(
					'title' => $this->l('Cancelled carts'),
					'icon' => 'icon-cogs'
				),
				'description' => $this->l('For each cancelled cart (with no order), generate a discount and send it to the customer.'),
				'input' => array(
					array(
						'type' => 'switch',
						'is_bool' => true, //retro-compat
						'label' => $this->l('Enable'),
						'name' => 'PS_FOLLOW_UP_ENABLE_1',
						'values' => array(
							array(
								'id' => 'active_on',
								'value' => 1,
								'label' => $this->l('Enabled')
							),
							array(
								'id' => 'active_off',
								'value' => 0,
								'label' => $this->l('Disabled')
							)
						),
					),
					array(
						'type' => 'text',
						'label' => $this->l('Discount amount'),
						'name' => 'PS_FOLLOW_UP_AMOUNT_1',
						'suffix' => '%',
					),
					array(
						'type' => 'text',
						'label' => $this->l('Discount validity'),
						'name' => 'PS_FOLLOW_UP_DAYS_1',
						'suffix' => $this->l('day(s)'),
					),
					array(
						'type' => 'desc',
						'name' => '',
						'text' => sprintf($this->l('The next process will send %d e-mail(s).'), $n1)
					),
				),
				'submit' => array(
					'title' => $this->l('Save'),
					'class' => 'btn btn-default pull-right'
				)
			),
		);

		$fields_form_3 = array(
			'form' => array(
				'legend' => array(
					'title' => $this->l('Re-order'),
					'icon' => 'icon-cogs'
				),
				'description' => $this->l('For each validated order, generate a discount and send it to the customer.'),
				'input' => array(
					array(
						'type' => 'switch',
						'is_bool' => true, //retro-compat
						'label' => $this->l('Enable'),
						'name' => 'PS_FOLLOW_UP_ENABLE_2',
						'values' => array(
							array(
								'id' => 'active_on',
								'value' => 1,
								'label' => $this->l('Enabled')
							),
							array(
								'id' => 'active_off',
								'value' => 0,
								'label' => $this->l('Disabled')
							)
						),
					),
					array(
						'type' => 'text',
						'label' => $this->l('Discount amount'),
						'name' => 'PS_FOLLOW_UP_AMOUNT_2',
						'suffix' => '%',
					),
					array(
						'type' => 'text',
						'label' => $this->l('Discount validity'),
						'name' => 'PS_FOLLOW_UP_DAYS_2',
						'suffix' => $this->l('day(s)'),
					),
					array(
						'type' => 'desc',
						'name' => '',
						'text' => sprintf($this->l('Next process will send: %d e-mail(s)'), $n2)
					),
				),
				'submit' => array(
					'title' => $this->l('Save'),
					'class' => 'btn btn-default pull-right'
				)
			),
		);

		$fields_form_4 = array(
			'form' => array(
				'legend' => array(
					'title' => $this->l('Best customers'),
					'icon' => 'icon-cogs'
				),
				'description' => $this->l('For each customer raising a threshold, generate a discount and send it to the customer.'),
				'input' => array(
					array(
						'type' => 'switch',
						'is_bool' => true, //retro-compat
						'label' => $this->l('Enable'),
						'name' => 'PS_FOLLOW_UP_ENABLE_3',
						'values' => array(
							array(
								'id' => 'active_on',
								'value' => 1,
								'label' => $this->l('Enabled')
							),
							array(
								'id' => 'active_off',
								'value' => 0,
								'label' => $this->l('Disabled')
							)
						),
					),
					array(
						'type' => 'text',
						'label' => $this->l('Discount amount'),
						'name' => 'PS_FOLLOW_UP_AMOUNT_3',
						'suffix' => '%',
					),
					array(
						'type' => 'text',
						'label' => $this->l('Threshold'),
						'name' => 'PS_FOLLOW_UP_THRESHOLD_3',
						'suffix' => $currency->sign,
					),
					array(
						'type' => 'text',
						'label' => $this->l('Discount validity'),
						'name' => 'PS_FOLLOW_UP_DAYS_3',
						'suffix' => $this->l('day(s)'),
					),
					array(
						'type' => 'desc',
						'name' => '',
						'text' => sprintf($this->l('Next process will send: %d e-mail(s)'), $n3)
					),
				),
				'submit' => array(
					'title' => $this->l('Save'),
					'class' => 'btn btn-default pull-right'
				)
			),
		);

		$fields_form_5 = array(
			'form' => array(
				'legend' => array(
					'title' => $this->l('Bad customers'),
					'icon' => 'icon-cogs'
				),
				'description' => $this->l('For each customer who has already placed at least one order and with no orders since a given duration, generate a discount and send it to the customer.'),
				'input' => array(
					array(
						'type' => 'switch',
						'is_bool' => true, //retro-compat
						'label' => $this->l('Enable'),
						'name' => 'PS_FOLLOW_UP_ENABLE_4',
						'values' => array(
							array(
								'id' => 'active_on',
								'value' => 1,
								'label' => $this->l('Enabled')
							),
							array(
								'id' => 'active_off',
								'value' => 0,
								'label' => $this->l('Disabled')
							)
						),
					),
					array(
						'type' => 'text',
						'label' => $this->l('Discount amount'),
						'name' => 'PS_FOLLOW_UP_AMOUNT_4',
						'suffix' => '%',
					),
					array(
						'type' => 'text',
						'label' => $this->l('Since x days'),
						'name' => 'PS_FOLLOW_UP_DAYS_THRESHOLD_4',
						'suffix' => $this->l('day(s)'),
					),
					array(
						'type' => 'text',
						'label' => $this->l('Discount validity'),
						'name' => 'PS_FOLLOW_UP_DAYS_4',
						'suffix' => $this->l('day(s)'),
					),
					array(
						'type' => 'desc',
						'name' => '',
						'text' => sprintf($this->l('Next process will send: %d e-mail(s)'), $n4)
					),
				),
				'submit' => array(
					'title' => $this->l('Save'),
					'class' => 'btn btn-default pull-right'
				)
			),
		);

		$fields_form_6 = array(
			'form' => array(
				'legend' => array(
					'title' => $this->l('General'),
					'icon' => 'icon-cogs'
				),
				'input' => array(
					array(
						'type' => 'switch',
						'is_bool' => true, //retro-compat
						'label' => $this->l('Delete outdated discounts during each launch to clean database'),
						'name' => 'PS_FOLLOW_UP_CLEAN_DB',
						'values' => array(
							array(
								'id' => 'active_on',
								'value' => 1,
								'label' => $this->l('Enabled')
							),
							array(
								'id' => 'active_off',
								'value' => 0,
								'label' => $this->l('Disabled')
							)
						),
					),
				),
				'submit' => array(
					'title' => $this->l('Save'),
					'class' => 'btn btn-default pull-right'
				)
			),
		);

		$helper = new HelperForm();
		$helper->show_toolbar = false;
		$helper->table = $this->table;
		$lang = new Language((int)Configuration::get('PS_LANG_DEFAULT'));
		$helper->default_form_language = $lang->id;
		$helper->allow_employee_form_lang = Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG') ? Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG') : 0;
		$helper->identifier = $this->identifier;
		$helper->override_folder = '/';
		$helper->module = $this;
		$helper->submit_action = 'submitFollowUp';
		$helper->currentIndex = $this->context->link->getAdminLink('AdminModules', false).'&configure='.$this->name.'&tab_module='.$this->tab.'&module_name='.$this->name;
		$helper->token = Tools::getAdminTokenLite('AdminModules');
		$helper->tpl_vars = array(
			'fields_value' => $this->getConfigFieldsValues(),
			'languages' => $this->context->controller->getLanguages(),
			'id_language' => $this->context->language->id
		);

		return $helper->generateForm(array(
			$fields_form_1,
			$fields_form_2,
			$fields_form_3,
			$fields_form_4,
			$fields_form_5,
			$fields_form_6
		));
	}

	public function getConfigFieldsValues()
	{
		return array(
			'PS_FOLLOW_UP_ENABLE_1' => Tools::getValue('PS_FOLLOW_UP_ENABLE_1', Configuration::get('PS_FOLLOW_UP_ENABLE_1')),
			'PS_FOLLOW_UP_DAYS_1' => Tools::getValue('PS_FOLLOW_UP_DAYS_1', Configuration::get('PS_FOLLOW_UP_DAYS_1')),
			'PS_FOLLOW_UP_AMOUNT_1' => Tools::getValue('PS_FOLLOW_UP_AMOUNT_1', Configuration::get('PS_FOLLOW_UP_AMOUNT_1')),
			'PS_FOLLOW_UP_ENABLE_2' => Tools::getValue('PS_FOLLOW_UP_ENABLE_2', Configuration::get('PS_FOLLOW_UP_ENABLE_2')),
			'PS_FOLLOW_UP_DAYS_2' => Tools::getValue('PS_FOLLOW_UP_DAYS_2', Configuration::get('PS_FOLLOW_UP_DAYS_2')),
			'PS_FOLLOW_UP_AMOUNT_2' => Tools::getValue('PS_FOLLOW_UP_AMOUNT_2', Configuration::get('PS_FOLLOW_UP_AMOUNT_2')),
			'PS_FOLLOW_UP_THRESHOLD_3' => Tools::getValue('PS_FOLLOW_UP_THRESHOLD_3', Configuration::get('PS_FOLLOW_UP_THRESHOLD_3')),
			'PS_FOLLOW_UP_DAYS_3' => Tools::getValue('PS_FOLLOW_UP_DAYS_3', Configuration::get('PS_FOLLOW_UP_DAYS_3')),
			'PS_FOLLOW_UP_ENABLE_3' => Tools::getValue('PS_FOLLOW_UP_ENABLE_3', Configuration::get('PS_FOLLOW_UP_ENABLE_3')),
			'PS_FOLLOW_UP_AMOUNT_3' => Tools::getValue('PS_FOLLOW_UP_AMOUNT_3', Configuration::get('PS_FOLLOW_UP_AMOUNT_3')),
			'PS_FOLLOW_UP_AMOUNT_4' => Tools::getValue('PS_FOLLOW_UP_AMOUNT_4', Configuration::get('PS_FOLLOW_UP_AMOUNT_4')),
			'PS_FOLLOW_UP_ENABLE_4' => Tools::getValue('PS_FOLLOW_UP_ENABLE_4', Configuration::get('PS_FOLLOW_UP_ENABLE_4')),
			'PS_FOLLOW_UP_DAYS_THRESHOLD_4' => Tools::getValue('PS_FOLLOW_UP_DAYS_THRESHOLD_4', Configuration::get('PS_FOLLOW_UP_DAYS_THRESHOLD_4')),
			'PS_FOLLOW_UP_DAYS_4' => Tools::getValue('PS_FOLLOW_UP_DAYS_4', Configuration::get('PS_FOLLOW_UP_DAYS_4')),
			'PS_FOLLOW_UP_CLEAN_DB' => Tools::getValue('PS_FOLLOW_UP_CLEAN_DB', Configuration::get('PS_FOLLOW_UP_CLEAN_DB')),
		);
	}
}