<?php

function api_client_kuri($hash){

    $sql = "SELECT client_id FROM `clients` WHERE `clienthash` = '$hash' LIMIT 1 ";
    $client = db_get($sql);

    if (isset($client['client_id']))
        return $client;
    
    return false;

}


function api_login($login, $password){

    $sqlogin = "SELECT `client_id`, `clientpassword` FROM `clients` WHERE `clientmail` = '$login' LIMIT 1";
    $client = dbl_get($sqlogin);

    if (!isset($client['clientpassword']))
        return ['error'=>'пользователь не найден'];

    if ($client['clientpassword'] == '')
        return ['error'=>'необходимо получить ссылку для доступа'];    

    if (!password_verify($password, $client['clientpassword'])) 
        return ['error' => 'неверный пароль'];

    return ['data' => $client];    

}


function clientbuys_kuri($client_id, $page = 1){

    $sql_sub = "SELECT number_id FROM anbuy WHERE client_id = '$client_id'  AND `number_id` = 486 LIMIT 1";
    $findsub =  db_get($sql_sub);

    
   if (isset($findsub['number_id'])) {// есть поп
        return clients_arch($page);
    }    

   $limit  = 25;
   $countsql = "SELECT DISTINCT COUNT(buy_id) as count FROM `anbuy` WHERE `client_id` = $client_id AND `buy_status` = '1' LIMIT 1";
   
   $buycount = db_get($countsql);
   

    $buysql = "
    SELECT DISTINCT
        price_id, pricehash, pricename, priceimg
    FROM anbuy 
    LEFT JOIN price ON anbuy.number_id = price.price_id
    WHERE client_id = '$client_id' AND `buy_status` = '1' 
    ORDER BY `buy_id` DESC
    LIMIT $limit";

    if ($page > 1){
        $offset = $limit * ($page -1);
        $pricesql .= " OFFSET $offset";
    }    

    $books = db_get($buysql);

    $result['books'] = clientbooks($books, $client_id);
    $result['count'] =  $buycount['count'];

    return $result;

}


function client_find_email($mail){

    if (!filter_var($mail, FILTER_VALIDATE_EMAIL))
        return ['error' => 'некорректный email'];

    $pwd_query = "SELECT * FROM `clients` WHERE `clientmail` = '$mail' LIMIT 1";
    $client = db_get($pwd_query);

    if (isset($client['client_id']))
        return $client;
    else
        return ['error' => 'client not found'];   

}

function client_find_hash($hash){


    $pwd_query = "SELECT * FROM `clients` WHERE `clienthash` = '$hash' LIMIT 1";
    $client = db_get($pwd_query);

    if (isset($client['client_id']))
        return $client;
    else
        return ['error' => 'client not found'];   

}


function client_find_id($id) {

    $id_query = "SELECT * FROM `clients` WHERE `client_id` = '$id' LIMIT 1";
    $client = db_get($id_query);

    if (!isset($client['client_id'])){
        return ['error' => 'client not found'];    
    }

    return ['result' => $client];

}


function client_check_auth($login, $pwd){
        
    $check_query = "SELECT * FROM `clients` WHERE `client_id` = '$login' LIMIT 1";

    $client = dbl_get($check_query);

    if (!isset($client['client_id'])){
        return ['error' => 'client not found'];
    }

    $hash_pwd = client_secret($client['client_id'], $client['clientpassword']);
    

    if ($pwd == $hash_pwd){
        return ['data' => $client];
    }
    else {
       return ['error' => 'invalid hash'];
    }   
        
}


function client_secret($id, $password){
    return md5($id.$password);
}


function client_add_password($client_id, $password, $confirm, $minlen = 5){


    if ($password == ''){
        return 'пароль не задан';
    }    
    
    if (strlen($password) < $minlen) {
        return  "пароль должен быть не менее $maxlen символов";
    }

    if ($password !== $confirm){
        return "пароли не совпадают";
    }

    $clientpassword = password_hash($password, PASSWORD_DEFAULT);  
    $sqlupdate = "UPDATE `clients` SET `clientpassword` = '$clientpassword' WHERE `client_id` = '$client_id'";

   
    $result =  db_get($sqlupdate, 'chitatel');
  

    return True;

}


function clientmail($mail, $hash){

    $client = db_get("SELECT * FROM `clients` WHERE `clientmail` = $mail LIMIT 1");

    if (!isset($client['client_id'])){
        echo 'Не верный запрос';
        return;
    }


    if ($client['clienthash'] !== $hash){
        echo 'Не верный запрос';
        return;
    }


}


//весь активный архив
function clients_arch($page = 1){

    $limit = 25;

    $countsql = "SELECT COUNT(price_id) AS count 
    FROM price
    WHERE category_id = 1
    LIMIT 1";

    $count = db_get($countsql);

    
    $pricesql = "SELECT price_id, pricehash, pricename, priceimg FROM price WHERE category_id = 1 ORDER BY price_id DESC LIMIT $limit";


    if ($page > 1){
        $offset = $limit * ($page -1);
        $pricesql .= " OFFSET $offset";
    }    

    $books = db_get($pricesql);

    $result['books'] = clientbooks($books);
    $result['subscript'] = true;
    $result['count'] = $count['count'];

    return $result;

}


function clientbooks($books){


    if (!is_array($books))
        return null;


    foreach($books as $book){
        $book['pic'] = IMGSRV."price/180x280/{$book['price_id']}.{$book['priceimg']}";
        $book['link'] = 'read/'.$book['pricehash'];
        $result[] = $book;
    }

    return $result;

}