<?php 

class Database
{
    public $conn;

    const DB_TABLE = 'fact_conf_marketplace';

    public function __construct()
    {

        $this->conn = @mysqli_connect(HOST, USERNAME, PASSWORD, DATABASE);

        if (!$this->conn) {
            echo 'Database connection failed: ' . mysqli_connect_error();
            exit;
        }

    }

    public function getConnection()
    {
        return $this->conn;
    }

    public function getAll()
    {
        $shops = array();
        $sql = "SELECT * FROM " . self::DB_TABLE. " WHERE market_code LIKE '%" . SHOPIFY_DOMAIN . "%'";
        
        $result = mysqli_query($this->conn, $sql);

        if (mysqli_num_rows($result) > 0) {
            while($row = mysqli_fetch_assoc($result)) {
                $shops[] = $row;
            }
        } 
            
        return $shops;
    }

    public function delete($shop)
    {
        $shopName = mysqli_real_escape_string($this->conn, $shop);
        $sqls = "SELECT * FROM " . self::DB_TABLE. " WHERE market_code = '" . $shopName . "' AND market_code LIKE '%" . SHOPIFY_DOMAIN . "%'";
        
        $result = mysqli_query($this->conn, $sqls);

        if (mysqli_num_rows($result) == 1) {
            $sqlu = "UPDATE " . self::DB_TABLE. " SET market_apikey = '', market_conf_json = '' WHERE market_code = '" . $shopName . "' AND market_code LIKE '%" . SHOPIFY_DOMAIN . "%'";

            if (!mysqli_query($this->conn, $sqlu)) {
                throw new \Exception("Error deleting shop: " . mysqli_error($this->conn));
            } 
            else
            {
                echo "Shop deleted successfully";
            }
        }        
    }

    protected function merge($currentShopData, $newShopData)
    {
        if(empty($currentShopData))
        {
            return $newShopData;
        }
        else
        {
            return array_merge($currentShopData, $newShopData);
        }
        
    }

    protected function update($data)
    {
        if(isset($_REQUEST['shop']) && ($_REQUEST['shop'] != ''))
        {
            $shop = mysqli_real_escape_string($this->conn, $_REQUEST['shop']);

            $sql = "UPDATE " . self::DB_TABLE. " SET market_conf_json = '" . json_encode($data) . "' WHERE market_code = '" .  $shop . "' AND market_code LIKE '%" . SHOPIFY_DOMAIN . "%'";

            if (!mysqli_query($this->conn, $sql)) {
                throw new \Exception($this->printException($sql . ": " . mysqli_error($this->conn)));
            }
        }
        else
        {
            throw new \Exception($this->printException(SHOP_REQUIRED));
        }
    }

    private function printException($message)
    {
        return 'Err Facturis Db: "' . $message . '". ';
    }

    public function getSettings($shop = '')
    {
        $shopName = '';
        if(!empty($shop))
        {
            $shopName = mysqli_real_escape_string($this->conn, $shop);
        }
        else
        {
            if(isset($_REQUEST['shop']) && ($_REQUEST['shop'] != ''))
            {
                $shopName = mysqli_real_escape_string($this->conn, $_REQUEST['shop']); 
            }
        }

        if(empty($shopName))
        {
            return array();
        }
       
        $sql = "SELECT market_conf_json FROM " . self::DB_TABLE. " WHERE market_code = '" . $shopName . "' AND market_code LIKE '%" . SHOPIFY_DOMAIN . "%'";
        $result = mysqli_query($this->conn, $sql);
        if($result)
        {
            if (mysqli_num_rows($result)> 0) {
                while($row = mysqli_fetch_assoc($result)) {
                    return json_decode($row['market_conf_json'], true);
                }
            } else {
                return array();
            }
        }
        else
        {
            throw new \Exception($this->printException($sql . ": " . mysqli_error($this->conn)));
        }
        
        return array();
        
    }

    public function saveOptions()
    {
        $new = array();

        if(isset($_POST['fsync_auth_apikey'])) $new['fsync_auth_apikey'] = $_POST['fsync_auth_apikey'];
        if(isset($_POST['fsync_auth_username'])) $new['fsync_auth_username'] = $_POST['fsync_auth_username'];
        if(isset($_POST['fsync_auth_password'])) $new['fsync_auth_password'] = $_POST['fsync_auth_password'];
        if(isset($_POST['fsync_auth_fiscalcode'])) $new['fsync_auth_fiscalcode'] = $_POST['fsync_auth_fiscalcode'];

        if(isset($_POST['fsync_option_autosyncstock'])) $new['fsync_option_autosyncstock'] = $_POST['fsync_option_autosyncstock'];
        if(isset($_POST['fsync_option_autosyncorder'])) $new['fsync_option_autosyncorder'] = $_POST['fsync_option_autosyncorder'];
        if(isset($_POST['fsync_option_filterstock'])) $new['fsync_option_filterstock'] = $_POST['fsync_option_filterstock'];
        if(isset($_POST['fsync_option_syncordersas'])) $new['fsync_option_syncordersas'] = $_POST['fsync_option_syncordersas'];
        if(isset($_POST['fsync_option_proformaserie'])) $new['fsync_option_proformaserie'] = $_POST['fsync_option_proformaserie'];
        if(isset($_POST['fsync_option_avizeserie'])) $new['fsync_option_avizeserie'] = $_POST['fsync_option_avizeserie'];
        if(isset($_POST['fsync_option_expfacturaserie'])) $new['fsync_option_expfacturaserie'] = $_POST['fsync_option_expfacturaserie'];
        if(isset($_POST['fsync_option_pdls'])) $new['fsync_option_pdls'] = $_POST['fsync_option_pdls'];
        if(isset($_POST['fsync_option_daysago'])) $new['fsync_option_daysago'] = $_POST['fsync_option_daysago'];
        if(isset($_POST['fsync_option_autosyncstock']) && !isset($_POST['fsync_option_daysago'])) $new['fsync_option_locations'] = '';
        if(isset($_POST['fsync_option_locations'])) $new['fsync_option_locations'] = implode(", ", $_POST['fsync_option_locations']);
        if(isset($_POST['fsync_option_withdiscount'])) $new['fsync_option_withdiscount'] = $_POST['fsync_option_withdiscount'];

        $current = $this->getSettings();

        $merged = $this->merge($current, $new);
        $this->update($merged);  
    }

    public function getToken($shop = '')
    {
        $shopName = '';
        if(!empty($shop))
        {
            $shopName = mysqli_real_escape_string($this->conn, $shop);
        }
        else
        {
            if(isset($_REQUEST['shop']) && ($_REQUEST['shop'] != ''))
            {
                $shopName = mysqli_real_escape_string($this->conn, $_REQUEST['shop']); 
            }
        }

        if(empty($shopName))
        {
            return '';
        }

        $sql = "SELECT market_apikey FROM " . self::DB_TABLE. " WHERE market_code = '" . $shopName . "' AND market_code LIKE '%" . SHOPIFY_DOMAIN . "%'";
        $result = mysqli_query($this->conn, $sql);
        if($result)
        {
            if (mysqli_num_rows($result) > 0) {
                while($row = mysqli_fetch_assoc($result)) {
                    return $row['market_apikey'];
                }
            } else {
                throw new \Exception($this->printException('A token is required for the script to run'));
            }
        }
        else
        {
            throw new \Exception($this->printException("Error: " . $sql . ": " . mysqli_error($this->conn)));
        }
        
        return '';
               
    }

    public function generateToken()
    {
        $query = array(
            "client_id" => API_KEY, 
            "client_secret" => SHARED_SECRET, 
            "code" => isset($_GET['code']) ?  $_GET['code'] : ''
        );
        
        $access_token_url = "https://" . (isset($_REQUEST['shop']) ? $_REQUEST['shop'] : '') . "/admin/oauth/access_token";
        
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_URL, $access_token_url);
        curl_setopt($ch, CURLOPT_POST, count($query));
        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($query));
        $result = curl_exec($ch);
        $curl_error = curl_error($ch);
        
        curl_close($ch);
        
        if($curl_error)
        {
            throw new \Exception('Error installation: ' . json_encode($curl_error));
        }
        
        $result = json_decode($result, true);
        if(!isset($result['access_token']))
        {
            throw new \Exception('Error installation: No token found');
        }

        return $result['access_token'];
    }

    public function add($access_token)
    {
        if(isset($_REQUEST['shop']) && ($_REQUEST['shop'] != ''))
        {
            $shop = mysqli_real_escape_string($this->conn, $_REQUEST['shop']);
            $token = mysqli_real_escape_string($this->conn, $access_token);
            
            $sql = "SELECT * FROM " . self::DB_TABLE. " WHERE market_code = '" . $shop . "' AND market_code LIKE '%" . SHOPIFY_DOMAIN . "%'";
            
            $result = mysqli_query($this->conn, $sql);
            if($result)
            {
                    if (mysqli_num_rows($result) > 0) 
                    {
                        $sql = "UPDATE " . self::DB_TABLE. " SET market_apikey = '" . $token . "', market_conf_json = '' WHERE market_code = '" . $shop . "' AND market_code LIKE '%" . SHOPIFY_DOMAIN . "%'"; 
                    }
                    else
                    {
                        $sql = 'INSERT INTO ' . self::DB_TABLE. ' (market_apikey, market_code) VALUE ("' . $token . '", "' . $shop . '")';
                    }

                    if (!mysqli_query($this->conn, $sql)) {
                        throw new \Exception($this->printException($sql . ": " . mysqli_error($this->conn)));
                    }
            }
            else
            {
                    throw new \Exception($this->printException($sql . ": " . mysqli_error($this->conn)));
            }
        }
       
       
    }

}