<?php

/**
 * Компонент импорта данных из xml файла. Памяти много не кушает, т.к. используется потоковое чтение.
 */
class XmlImportComponent
{
    const SECTION_BUILDERS = 1;
    const SECTION_SUBWAYS = 2;
    const SECTION_REGIONS = 3;
    const SECTION_ROOMTYPES = 4;
    const SECTION_FLATTYPES = 5;
    const SECTION_BANKS = 6;
    const SECTION_BLOCKS = 7;
    const SECTION_BUILDINGS = 8;
    const SECTION_APARTMENTS = 9;
    const SECTION_BLOCKSUBWAYS = 10;
    const SECTION_MORTGAGES = 11;
    const SECTION_BANK_PROGRAMS = 12;
    const SECTION_BANK_PROGRAM_RATES = 13;
    const SECTION_CLASSES = 14;

    private static $sectionsXpath = [
        self::SECTION_BUILDERS => 'Ads/Builders',
        self::SECTION_SUBWAYS => 'Ads/Subways',
        self::SECTION_REGIONS => 'Ads/Regions',
        self::SECTION_ROOMTYPES => 'Ads/RoomTypes',
        self::SECTION_FLATTYPES => 'Ads/FlatTypes',
        self::SECTION_BANKS => 'Ads/Banks',
        self::SECTION_BANK_PROGRAMS => 'Ads/BankPrograms',
        self::SECTION_BANK_PROGRAM_RATES => 'Ads/BankProgramRates',
        self::SECTION_CLASSES => 'Ads/Classes',
        self::SECTION_BLOCKS => 'Ads/Blocks',
        self::SECTION_BUILDINGS => 'Ads/Buildings',
        self::SECTION_APARTMENTS => 'Ads/Apartments',
        self::SECTION_BLOCKSUBWAYS => 'Ads/BlockSubways',
        self::SECTION_MORTGAGES => 'Ads/Mortgages'
    ];

    private $filename = '';
    private $builders = [];
    private $currentPath = [];

    public function setBuilder($sectionId, ModelBuilder $builder)
    {
        assert('isset(self::$sectionsXpath[$sectionId])');
        $this->builders[$sectionId] = $builder;
    }

    /**
     * @var ImporterService
     */
    private $importerService;
    public function __construct($filename)
    {
        if (!is_file($filename)) {
            throw new Exception('File not found');
        }

        $this->importerService = new ImporterService();
        $this->filename = $filename;
    }

    private function getAttributesArray(\XmlReader $reader)
    {
        $attrs = [];
        while ($reader->moveToNextAttribute()) {
            $attrs[$reader->localName] = $reader->value;
        }

        return $attrs;
    }

    private function getNextSection(\XmlReader $reader)
    {
        $sectionsByXpaths = array_flip(self::$sectionsXpath);

        if ($reader->nodeType == \XmlReader::END_ELEMENT) {
            $this->closeElement($reader->localName);
        }

        while ($reader->read()) {
            switch ($reader->nodeType) {

                case \XMLReader::ELEMENT:
                    $this->currentPath[] = $reader->localName;
                    $curPath = implode('/', $this->currentPath);
                    if (isset($sectionsByXpaths[$curPath])) {
                        return $sectionsByXpaths[$curPath];
                    }
                    break;

                case \XMLReader::END_ELEMENT:
                    $this->closeElement($reader->localName);
                    break;

            }
        }

        return 0;
    }

    private function closeElement($elementName)
    {
        while ($this->currentPath && array_pop($this->currentPath) !== $elementName);
    }

    private function getElements(\XmlReader $reader, ModelBuilder $builder)
    {
        $newElementsCount = 0;
        $count = 0;

        while ($reader->read() && $reader->nodeType != \XmlReader::END_ELEMENT) {
            if ($reader->nodeType == \XmlReader::ELEMENT) {
                $model = $builder->getModel($data = $this->getAttributesArray($reader));
                assert('$model instanceof ImportRecord');

                // price history for nb charts
                if ($model instanceof Apartment) {
                    if ($ap_model = Apartment_sale::findOne((int)$data['id'])) {
                        if ($ap_model->meter_price != (int)$data['metrecostbase']) {
                            $sql = "INSERT INTO price_history (ap_id, discount_meter_price, created_at) VALUES 
                                ('" . $ap_model->id . "', '" . $ap_model->discount_meter_price . "', '" . $ap_model->updated_at . "')";
                            try {
                                mysql_query($sql);
                            } catch (Exception $e) {
                                echo $e->getMessage();
                                return false;
                            }

                            $ap_model->discount_meter_price = (int)$data['metrecostwithdiscounts'];
//                            $ap_model->updated_at = date('Y-m-d H:i:s');
                        }
                        $ap_model->save();
                    } else {
                        $ap_model = new Apartment_sale;
                        $ap_model->id = $data['id'];
                        $ap_model->block_id = (int)$data['blockid'];
                        $ap_model->building_id = (int)$data['buildingid'];
                        $ap_model->room_type_id = (int)$data['rooms']+1;

                        $ap_model->space_total = Convertor::strToFloat($data['stotal']);
                        $ap_model->height = Convertor::strToFloat($data['height']);

                        $ap_model->number = $data['number'];
                        $ap_model->section = $data['section'];

                        $ap_model->base_price = (int)$data['flatcostbase'];
                        $ap_model->meter_price = (int)$data['metrecostbase'];

                        $ap_model->price = (int)$data['flatcostwithdiscounts'];
                        $ap_model->discount_price = (int)$data['flatcostwithdiscounts'];
                        $ap_model->discount_meter_price = (int)$data['metrecostwithdiscounts'];

                        $ap_model->space_kitchen = $data['skitchen'];
                        $ap_model->space_corridor = $data['scorridor'];
                        $ap_model->space_room = $data['sroom'];
                        $ap_model->space_balcony = $data['sbalcony'];
                        $ap_model->space_watercloset = $data['swatercloset'];

                        $ap_model->flat_type_id = (int)$data['flattypeid']+1;
                        $ap_model->decoration_id = DecorationType::getIdByName($data['decoration']);
                        $ap_model->subsidy = (int)$data['subsidy'];
                        $ap_model->creditend = (int)$data['creditend'];
                        $ap_model->flat_floor = (int)$data['flatfloor'];
                        $ap_model->save();
                    }
                }
                // price history for nb charts END

                $isNew = $model->getIsNewRecord();
                if ($model->save()) {
                    if ($isNew) {
                        ++$newElementsCount;
                    }
                    ++$count;
                } else {
                    echo 'Cannt save model!';
                    //print_r($model->attributes);
                    //print_r($model->errors);
                }
            }
        }
        return [$newElementsCount, $count];
    }


    public function loadData(Callable $afterSectionLoad=null)
    {
        $reader = new \XmlReader();
        $reader->open($this->filename);
        $this->importerService->setStatus(1);
        $this->importerService->setForceImport(0);
        try {
            while($sectionId = $this->getNextSection($reader)) {

                if (!isset($this->builders[$sectionId])) {
                    continue;
                }

                $builder = $this->builders[$sectionId];


                $modelClass = $builder->getModelClassName();
                $startTime = time();

                // на случай если все произошло очень быстро
                sleep(1);
                list($newElementsCount, $count) = $this->getElements($reader, $builder);

                $wastedTime = time() - $startTime;

                $model = new $modelClass();
                $delElementsCount = null;
                if ($model instanceof Apartment) {
                    $cond = '(UNIX_TIMESTAMP(updated_at) > 0 AND UNIX_TIMESTAMP() - UNIX_TIMESTAMP(updated_at) > ' .$wastedTime . ') 
                    or (UNIX_TIMESTAMP(updated_at) = 0 and UNIX_TIMESTAMP() - UNIX_TIMESTAMP(created_at) > ' .$wastedTime . ')';

                    $result = mysql_query("SELECT * FROM apartments WHERE ".$cond);
                    $data = [];
                    while ($obj = mysql_fetch_assoc($result)) {
                        $sql = "UPDATE apartments_sales SET is_sold=1 WHERE id='" . $obj['id']."'";
                        try {
                            mysql_query($sql);
                        } catch (Exception $e) {
                            echo $e->getMessage();
                            return false;
                        }
                    }

                    $delElementsCount = $modelClass::deleteAll($cond);
                }

                if ($afterSectionLoad) {
                    $afterSectionLoad($modelClass, $wastedTime, $newElementsCount, $delElementsCount, $count);
                }
            }
        } catch (\Exception $e) {
            //todo log error
            echo  $e;
        } finally {
            $this->importerService->setStatus(0);
            $reader->close();
        }
    }

}