<?php

declare(strict_types=1);

namespace App\Service;

use App\Domain\Entity\ParsedPortfolio;
use App\Domain\Entity\PortfolioDetailItem;
use App\Domain\Entity\PortfolioHeader;
use App\Domain\Entity\PortfolioMovementItem;

class XmlParser
{
    private const XML_HEADER_AGRMT        = 'ШапкаГенСог';
    private const XML_HEADER_PERIOD       = 'ШапкаПериод';
    private const XML_PORTFOLIO_TABLE     = 'ШапкаПортфель';
    private const XML_PORTFOLIO_SECTION   = 'ЗаголовокПортфель';
    private const XML_MOVEMENTS_SECTION   = 'ШапкаДвиженияИОстаткиЦБ';
    private const PREFIX_DETAILS          = 'Детали';

    private const ATTR_CLIENT              = 'Клиент';
    private const ATTR_START_DATE          = 'НачПериода';
    private const ATTR_END_DATE            = 'КонПериода';
    private const ATTR_PERIOD_LINE         = 'СтрокаПериода';
    private const ATTR_PERIOD              = 'Период';
    private const ATTR_SECURITY            = 'ЦБ';
    private const ATTR_ISSUER              = 'Эмитент';
    private const ATTR_PRICE_START         = 'НОЦена';
    private const ATTR_PRICE_END           = 'КОЦена';
    private const ATTR_QTY_START           = 'КоличествоНО';
    private const ATTR_QTY_END             = 'КоличествоКО';
    private const ATTR_SUM_START           = 'СуммаНКДНО';
    private const ATTR_SUM_END             = 'СуммаНКДКО';
    private const ATTR_SUM_TOTAL           = 'КОСумма';
    private const ATTR_QTY_START_MV        = 'НО';
    private const ATTR_QTY_END_MV          = 'КО';
    private const ATTR_QTY_INCOME          = 'Приход';
    private const ATTR_QTY_OUTCOME         = 'Расход';
    private const DATE_FORMAT              = 'd.m.Y';

    public function processXml(\SimpleXMLElement $xml): ParsedPortfolio
    {
        return new ParsedPortfolio(
            header: $this->processXmlHeader($xml),
            details: $this->processDetails(
                $xml->{self::XML_PORTFOLIO_SECTION}->{self::XML_PORTFOLIO_TABLE}
            ),
            movements: $this->processMovements(
                $xml->{self::XML_MOVEMENTS_SECTION}
            ),
        );
    }

    private function processXmlHeader(\SimpleXMLElement $xml): PortfolioHeader
    {
        $attrs = [];
        foreach ([self::XML_HEADER_AGRMT, self::XML_HEADER_PERIOD] as $section) {
            foreach ($xml->{$section}->attributes() as $key => $value) {
                $attrs[$key] = get_object_vars($value)[0];
            }
        }

        if (array_key_exists(self::ATTR_START_DATE, $attrs)) {
            $startDate = \DateTimeImmutable::createFromFormat(
                self::DATE_FORMAT,
                $attrs[self::ATTR_START_DATE],
            );
            $endDate = \DateTimeImmutable::createFromFormat(
                self::DATE_FORMAT,
                $attrs[self::ATTR_END_DATE],
            );
        } elseif (array_key_exists(self::ATTR_PERIOD_LINE, $attrs)) {
            $chunks = explode(' ', $attrs[self::ATTR_PERIOD_LINE]);
            if (count($chunks) !== 4) {
                throw new \RuntimeException('Unexpected period format');
            }
            $startDate = \DateTimeImmutable::createFromFormat(self::DATE_FORMAT, $chunks[1]);
            $endDate   = \DateTimeImmutable::createFromFormat(self::DATE_FORMAT, $chunks[3]);
        } else {
            throw new \RuntimeException('Cannot detect XML header version');
        }

        if (!$startDate || !$endDate) {
            throw new \RuntimeException('Invalid date format in XML header');
        }

        return new PortfolioHeader(
            clientAgreement: $attrs[self::ATTR_CLIENT],
            startDate: $startDate,
            endDate: $endDate,
        );
    }

    private function processDetails(\SimpleXMLElement $xml): array
    {
        $items = [];

        foreach (get_object_vars($xml) as $key => $value) {
            if (mb_strpos($key, self::PREFIX_DETAILS) === false) {
                continue;
            }

            if (!is_array($value)) {
                $value = [$value];
            }

            foreach ($value as $line) {
                $attr = [];
                foreach ($line->attributes() as $attrName => $attrValue) {
                    $attr[$attrName] = get_object_vars($attrValue)[0];
                }

                $items[] = new PortfolioDetailItem(
                    issuer:        $attr[self::ATTR_ISSUER],
                    security:      $attr[self::ATTR_SECURITY],
                    priceStart:    $attr[self::ATTR_PRICE_START],
                    priceEnd:      $attr[self::ATTR_PRICE_END],
                    quantityStart: (int) $attr[self::ATTR_QTY_START],
                    quantityEnd:   (int) $attr[self::ATTR_QTY_END],
                    sumStart:      $attr[self::ATTR_SUM_START],
                    sumEnd:        $attr[self::ATTR_SUM_END],
                    sumTotal:      $attr[self::ATTR_SUM_TOTAL],
                );
            }
        }

        return $items;
    }

    private function processMovements(\SimpleXMLElement $xml): array
    {
        $items = [];

        foreach (get_object_vars($xml) as $key => $value) {
            if (mb_strpos($key, self::PREFIX_DETAILS) === false) {
                continue;
            }

            if (!is_array($value)) {
                $value = [$value];
            }

            foreach ($value as $line) {
                $attr = [];
                foreach ($line->attributes() as $attrName => $attrValue) {
                    $attr[$attrName] = get_object_vars($attrValue)[0];
                }

                $items[] = new PortfolioMovementItem(
                    security:       $attr[self::ATTR_SECURITY],
                    period:         new \DateTimeImmutable($attr[self::ATTR_PERIOD]),
                    quantityStart:  (int) $attr[self::ATTR_QTY_START_MV],
                    quantityEnd:    (int) $attr[self::ATTR_QTY_END_MV],
                    quantityIncome: (int) $attr[self::ATTR_QTY_INCOME],
                    quantityOutcome:(int) $attr[self::ATTR_QTY_OUTCOME],
                );
            }
        }

        return $items;
    }
}