<?php
require_once($_SERVER['DOCUMENT_ROOT']."/ajax/vue_php_function.php");

if(isset($_POST['step'])){
    $res = array();
    $id = (int)$_POST['step'];
    $clientId = (int)$_POST['client'];
    $req_id = 0;
    if(isset($_POST['req_id'])){
        $req_id = (int)$req_id;
    }

    $change_step_query = mysql_query("SELECT * FROM clients_funnel_step WHERE client_id = " . $clientId);
    if($req_id > 0){
        $change_step_query = mysql_query("SELECT * FROM clients_funnel_step WHERE req_id = " . $req_id);
    }
    //echo $change_step_query;
    $next_id = 0;
    $change_step = array('step_id' => 0);
    if (mysql_num_rows($change_step_query) > 0) {
        $change_step = mysql_fetch_assoc($change_step_query);
        $next_id = $change_step['next_id'];
    }
    $next_steps = array();
    $funnel_step = mysql_query("SELECT * FROM funnel_steps WHERE funnel_id = (select funnel_id from funnel_steps where id=$id) and deleted=0 order by order_number, branch");
    $isActive = true;
    $classF = ' active';
    $stage = null;
    if ((int)$change_step['step_id'] == 0) {
        $isActive = false;
    }
    $arr_steps = array();
    while($step = mysql_fetch_assoc($funnel_step)){
        $step['isActive'] = (int)$isActive;
        $step['nextStep'] = false;
        if($step['main'] == 1 && !$isActive){
            $next_steps[] = $step['id'];
        }
        if($step['id'] == (int)$change_step['step_id']){
            $next_steps = json_decode( htmlspecialchars_decode($step['next_step']));
            if($next_id == 0){
                $isActive = false;
            }
        } else if ($step['id'] == (int)$next_id){
            $isActive = false;
        }
        $arr_steps[$step['id']] = $step;
    }

    if($next_id != 0 && !empty($next_steps)){
        foreach($next_steps as $key => $st){
            if($st != $next_id){
                unset($next_steps[$key]);

            }
        }
    }

    foreach ($arr_steps as $idstep => $step) {
        if (in_array($idstep, $next_steps)) {
            $stage = $step;
        }
    }

    if ($stage == null) {
        foreach ($arr_steps as $idstep => $step) {
            if ($step['stage'] == 'Закрыт') {
                $stage = $step;
            }
        }
    }

    if ($stage == null) {
        $stage['id'] = -1;
    }

    foreach ($arr_steps as $idstep => $step) {
        if ($idstep == $stage['id']) {
            $next_steps = json_decode(htmlspecialchars_decode($step['next_step']));
        }
    }

    $canMove = false;
    $sql_c = "select step_id from clients where id=$clientId";
    $q_c = mysql_query($sql_c);
    $r_c = mysql_fetch_assoc($q_c);
    $prev_step = $r_c['step_id'];
    $isPrev = false;
     //echo
    //var_dump($arr_steps);
    foreach ($arr_steps as $idstep => $step) {
       // if (in_array($idstep, $next_steps)) {
       // echo $prev_step.' --- '.$idstep."\n";
        if($prev_step == $idstep){
           $isPrev = true;
        }
        if ($idstep == $id && $isPrev) {
            $canMove = true;
        }
       // }
    }

    if ($canMove) {
        $res['result'] = '1';
    } else {
        $res['result'] = '0';
    }
    $res['etap'] = $stage['id'];
    echo json_encode($res, JSON_UNESCAPED_UNICODE);
}