<?php

class Upgrade23 extends Upgrade
{
    public function upgrade()
    {
        $changed = false;

        if (findModule('stock_in') && $this->checkRightfulness_2()) {
            $this->makeChanges_2();
            $changed = true;
        }

        if (findModule('stock_in') && $this->checkRightfulness_3()) {
            $this->makeChanges_3();
            $changed = true;
        }

        if (findModule('stock_in') && $this->checkRightfulness_4()) {
            $this->makeChanges_4();
            $changed = true;
        }

        if ($this->checkRightfulness_5()) {
            $this->makeChanges_5();
            $changed = true;
        }

        if (findModule('inventory') && $this->checkRightfulness_6()) {
            $this->makeChanges_6();
            $changed = true;
        }

        if ($changed == false) {
            $this->noChanges();
        }

        $this->printResult();
    }

    // overi, jestli je opravnene provest upgrade
    public function checkRightfulness_2()
    {
        return $this->checkColumnExists('stock_in', 'id_index');
    }

    // provest samotny upgrade
    public function makeChanges_2()
    {
        sqlQuery('ALTER TABLE '.getTableName('stock_in')." ADD `id_index` INT(11) NOT NULL DEFAULT '1' AFTER `id`");

        $this->upgradeOK();
    }

    // overi, jestli je opravnene provest upgrade
    public function checkRightfulness_3()
    {
        return $this->checkColumnExists('stock_in_items', 'name');
    }

    // provest samotny upgrade
    public function makeChanges_3()
    {
        sqlQuery('ALTER TABLE '.getTableName('stock_in_items').' ADD `name` VARCHAR(100) NULL DEFAULT NULL AFTER `id`');

        $this->upgradeOK();
    }

    // overi, jestli je opravnene provest upgrade
    public function checkRightfulness_4()
    {
        return $this->checkColumnExists('stock_in', 'number');
    }

    // provest samotny upgrade
    public function makeChanges_4()
    {
        sqlQuery('ALTER TABLE '.getTableName('stock_in').' ADD `number` INT(11) NOT NULL AFTER `id`');

        sqlQuery('UPDATE '.getTableName('stock_in').' si
	        SET number=id');

        $this->upgradeOK();
    }

    // overi, jestli je opravnene provest upgrade
    public function checkRightfulness_5()
    {
        return $this->checkColumnExists('products_variations', 'code') && !$this->checkTableExists('products_variations');
    }

    // provest samotny upgrade
    public function makeChanges_5()
    {
        sqlQuery('ALTER TABLE '.getTableName('products_variations').' ADD `code` VARCHAR(20) DEFAULT NULL AFTER `id_product`');

        sqlQuery('ALTER TABLE '.getTableName('products_variations').'
           ADD UNIQUE KEY `code` (`code`)');

        $this->upgradeOK();
    }

    // overi, jestli je opravnene provest upgrade
    public function checkRightfulness_6()
    {
        return $this->checkTableExists('inventory');
    }

    // provest samotny upgrade
    public function makeChanges_6()
    {
        sqlQuery('CREATE TABLE '.getTableName('inventory')." (
               `id` INT(11) NOT NULL AUTO_INCREMENT,
                 `name` VARCHAR(20) NOT NULL,
                 `note` VARCHAR(50) DEFAULT NULL,
                 `finished` TINYINT(1) NOT NULL DEFAULT '0',
	              PRIMARY KEY (`id`), 
	              UNIQUE KEY `name` (`name`)
               ) ENGINE=InnoDB ");

        sqlQuery('CREATE TABLE '.getTableName('inventory_items').' (
               `id` INT(11) NOT NULL AUTO_INCREMENT,
                 `id_inventory` INT(11) NOT NULL,
                 `id_product` INT(11) NOT NULL,
                 `id_variation` INT(11) DEFAULT NULL,
                 `quantity` INT(11) NOT NULL,
	              PRIMARY KEY (`id`),
	              KEY `id_inventory` (`id_inventory`), 
	              KEY `id_product` (`id_product`), 
	              KEY `id_variation` (`id_variation`)
               ) ENGINE=InnoDB ');

        sqlQuery('ALTER TABLE '.getTableName('inventory_items').'
         	   ADD CONSTRAINT `inventory_items_ibfk_1` FOREIGN KEY (`id_inventory`) REFERENCES `inventory` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
         	   ADD CONSTRAINT `inventory_items_ibfk_2` FOREIGN KEY (`id_product`) REFERENCES `products` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
         	   ADD CONSTRAINT `inventory_items_ibfk_3` FOREIGN KEY (`id_variation`) REFERENCES `products_variations` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');

        $this->upgradeOK();
    }
}