<?php
/**
* Module My Easy ERP Web In Color 
* 
*  @author    Web In Color - addons@webincolor.fr
*  @version 2.6
*  @uses Prestashop modules
*  @since 1.0 - mai 2014
*  @package Wic ERP
*  @copyright Copyright &copy; 2014, Web In Color
*  @license   http://www.webincolor.fr
*/

class ErpOrderDetail extends ObjectModel
{
    /**
     * @var int JustIn Time order
     */
    public $id_erp_order;

    /**
     * @var int Product ordered
     */
    public $id_product;

    /**
     * @var int Product attribute ordered
     */
    public $id_product_attribute;

    /**
     * @var string Product reference
     */
    public $reference;

    /**
     * @var string Product supplier reference
     */
    public $supplier_reference;

    /**
     * @var int Product name
     */
    public $name;

    /**
     * @var int Product EAN13
     */
    public $ean13;

    /**
     * @var string UPC
     */
    public $upc;

    /**
     * @var int Currency used to buy this particular product
     */
    public $id_currency;

    /**
     * @var float Exchange rate between $id_currency and SupplyOrder::$id_ref_currency, at the time
     */
    public $exchange_rate;

    /**
     * @var float Unit price without discount, without tax
     */
    public $unit_price_te = 0;

    /**
     * @var int Quantity ordered
     */
    public $quantity_ordered = 0;

    /**
     * @var int Quantity received
     */
    public $quantity_received = 0;

    /**
     * @var float This defines the price of the product, considering the number of units to buy.
     * ($unit_price_te * $quantity), without discount, without tax
     */
    public $price_te = 0;

    /**
     * @var float Supplier discount rate for a given product
     */
    public $discount_rate = 0;

    /**
     * @var float Supplier discount value (($discount_rate / 100) * $price_te), without tax
     */
    public $discount_value_te = 0;

    /**
     * @var float ($price_te - $discount_value_te), with discount, without tax
     */
    public $price_with_discount_te = 0;

    /**
     * @var int Tax rate for the given product
     */
    public $tax_rate = 0;

    /**
     * @var float Tax value for the given product
     */
    public $tax_value = 0;

    /**
     * @var float ($price_with_discount_te + $tax_value)
     */
    public $price_ti = 0;

    /**
     * @var float Tax value of the given product after applying the global order discount (i.e. if SupplyOrder::discount_rate is set)
     */
    public $tax_value_with_order_discount = 0;

    /**
     * @var float This is like $price_with_discount_te, considering the global order discount.
     * (i.e. if SupplyOrder::discount_rate is set)
     */
    public $price_with_order_discount_te = 0;

    /**
     * @see ObjectModel::$definition
     */
    public static $definition = array(
        'table' => 'erp_order_detail',
        'primary' => 'id_erp_order_detail',
        'fields' => array(
            'id_erp_order'                    =>    array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
            'id_product'                    =>    array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
            'id_product_attribute'            =>    array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
            'reference'                    =>    array('type' => self::TYPE_STRING, 'validate' => 'isReference'),
            'supplier_reference'            =>    array('type' => self::TYPE_STRING, 'validate' => 'isReference'),
            'name'                            =>    array('type' => self::TYPE_STRING, 'validate' => 'isGenericName', 'required' => true),
            'ean13'                        =>    array('type' => self::TYPE_STRING, 'validate' => 'isEan13'),
            'upc'                            =>    array('type' => self::TYPE_STRING, 'validate' => 'isUpc'),
            'id_currency'                    =>    array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
            'exchange_rate'                =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat', 'required' => true),
            'unit_price_te'                =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true),
            'quantity_ordered'                =>    array('type' => self::TYPE_INT, 'validate' => 'isUnsignedInt', 'required' => true),
            'quantity_received'            =>    array('type' => self::TYPE_INT, 'validate' => 'isUnsignedInt'),
            'price_te'                        =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true),
            'discount_rate'                =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat', 'required' => true),
            'discount_value_te'            =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true),
            'price_with_discount_te'        =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true),
            'tax_rate'                        =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat', 'required' => true),
            'tax_value'                    =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true),
            'price_ti'                        =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true),
            'tax_value_with_order_discount' =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat', 'required' => true),
            'price_with_order_discount_te'    =>    array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true),
        ),
    );

    /**
     * @see ObjectModel::update()
     */
    public function update($null_values = false)
    {
        $this->calculatePrices();

        parent::update($null_values);
    }

    /**
     * @see ObjectModel::add()
     */
    public function add($autodate = true, $null_values = false)
    {
        $this->calculatePrices();

        parent::add($autodate, $null_values);
    }

    /**
     * Calculates all prices for this product based on its quantity and unit price
     * Applies discount if necessary
     * Calculates tax value, function of tax rate
     */
    protected function calculatePrices()
    {
        // calculates entry price
        $this->price_te = Tools::ps_round((float)$this->unit_price_te * (int)$this->quantity_ordered, 6);

        // calculates entry discount value
        if ($this->discount_rate != null && (is_float($this->discount_rate) || is_numeric($this->discount_rate)) && $this->discount_rate > 0) {
            $this->discount_value_te = Tools::ps_round((float)$this->price_te * ($this->discount_rate / 100), 6);
        }

        // calculates entry price with discount
        $this->price_with_discount_te = Tools::ps_round($this->price_te - $this->discount_value_te, 6);

        // calculates tax value
        $this->tax_value = Tools::ps_round($this->price_with_discount_te * ((float)$this->tax_rate / 100), 6);
        $this->price_ti = Tools::ps_round($this->price_with_discount_te + $this->tax_value, 6);

        // defines default values for order discount fields
        $this->tax_value_with_order_discount = Tools::ps_round($this->tax_value, 6);
        $this->price_with_order_discount_te = Tools::ps_round($this->price_with_discount_te, 6);
    }

    /**
     * Applies a global order discount rate, for the current product (i.e detail)
     * Calls ObjectModel::update()
     *
     * @param $discount_rate The discount rate in percent (Ex. 5 for 5 percents)
     */
    public function applyGlobalDiscount($discount_rate)
    {
        if ($discount_rate != null && is_numeric($discount_rate) && (float)$discount_rate > 0) {
            // calculates new price, with global order discount, tax ecluded
            $discount_value = $this->price_with_discount_te - (($this->price_with_discount_te * (float)$discount_rate) / 100);

            $this->price_with_order_discount_te = Tools::ps_round($discount_value, 6);

            // calculates new tax value, with global order discount
            $this->tax_value_with_order_discount = Tools::ps_round($this->price_with_order_discount_te * ((float)$this->tax_rate / 100), 6);

            parent::update();
        }
    }

    /**
     * @see ObjectModel::validateController()
     *
     * @param $htmlentities Optional
     * @return $errors If any..
     */
    public function validateController($htmlentities = true)
    {
        $errors = array();

        /* required fields */
        $fields_required = $this->fieldsRequired;

        if (isset(self::$fieldsRequiredDatabase[get_class($this)])) {
            $fields_required = array_merge(
                $this->fieldsRequired,
                self::$fieldsRequiredDatabase[get_class($this)]
            );
        }

        foreach ($fields_required as $field) {
            if (($value = $this->{$field}) == false && (string)$value != '0') {
                if (!$this->id || $field != 'passwd') {
                    $errors[] = '<b>'.ErpOrderDetail::displayFieldName($field, get_class($this), $htmlentities)
                                .'</b> '.Tools::displayError('is required.');
                }
            }
        }

        /* Checks maximum fields sizes */
        foreach ($this->fieldsSize as $field => $max_length) {
            if ($value = $this->{$field} && Tools::strlen($value) > $max_length) {
                $errors[] = sprintf(
                    Tools::displayError('%1$s is too long. Maximum length: %2$d'),
                    ErpOrderDetail::displayFieldName($field, get_class($this), $htmlentities),
                    $max_length
                );
            }
        }

        /* Checks fields validity */
        foreach ($this->fieldsValidate as $field => $function) {
            if ($value = $this->{$field}) {
                if (!Validate::$function($value) && (!empty($value) || in_array($field, $this->fieldsRequired))) {
                    $errors[] = '<b>'.ErpOrderDetail::displayFieldName($field, get_class($this), $htmlentities).'</b> '.Tools::displayError('is invalid.');
                } elseif ($field == 'passwd') {
                    if ($value = Tools::getValue($field)) {
                        $this->{$field} = Tools::encrypt($value);
                    } else {
                        $this->{$field} = $value;
                    }
                }
            }
        }

        if ($this->quantity_ordered <= 0) {
            $errors[] = '<b>'.ErpOrderDetail::displayFieldName('quantity_ordered', get_class($this)).'</b> '.Tools::displayError('is invalid.');
        }

        if ($this->tax_rate < 0 || $this->tax_rate > 100) {
            $errors[] = '<b>'.ErpOrderDetail::displayFieldName('tax_rate', get_class($this)).'</b> '.Tools::displayError('is invalid.');
        }

        if ($this->discount_rate < 0 || $this->discount_rate > 100) {
            $errors[] = '<b>'.ErpOrderDetail::displayFieldName('discount_rate', get_class($this)).'</b> '.Tools::displayError('is invalid.');
        }

        return $errors;
    }

    /**
     * @see ObjectModel::hydrate()
     */
    public function hydrate(array $data, $id_lang = null)
    {
        $this->id_lang = $id_lang;
        if (isset($data[$this->def['primary']])) {
            $this->id = $data[$this->def['primary']];
        }
        foreach ($data as $key => $value) {
            if (array_key_exists($key, $this)) {
                // formats prices and floats
                if ($this->def['fields'][$key]['validate'] == 'isFloat' ||
                    $this->def['fields'][$key]['validate'] == 'isPrice') {
                    $value = Tools::ps_round($value, 6);
                }
                $this->$key = $value;
            }
        }
    }

    public static function getProductRealQuantities($id_product, $id_attribute)
    {
        return Db::getInstance()->getValue('SELECT SUM(od.`product_quantity`-od.`product_quantity_refunded`)
													-SUM(od.`product_quantity_in_stock`) as `stock_to_order`
											FROM
												`'._DB_PREFIX_.'order_detail` od
											LEFT JOIN 
												`'._DB_PREFIX_.'orders` o ON (o.`id_order` = od.`id_order`)
											WHERE
												od.`product_id` = '.(int)$id_product.'
											AND
												od.`product_attribute_id` = '.(int)$id_attribute.' 
											AND
												o.`current_state` IN ('.pSQL(Configuration::get('WIC_ERP_NOT_COMPLETE')).')
											');
    }
}