<?php

namespace Modules\EcommerceFinance\View;

use Illuminate\Http\Request;
use Illuminate\Pagination\LengthAwarePaginator;
use Modules\EcommerceFinance\Repositories\DingProcessDetailMirrorRepository;
use Throwable;

class ProcessDetailsPageData
{
    public const PER_PAGE_OPTIONS = [50, 100, 200];

    public const DEFAULT_PER_PAGE = 50;

    public function __construct(
        private readonly DingProcessDetailMirrorRepository $repository,
    ) {}

    public static function normalizePerPage(mixed $value): int
    {
        $perPage = (int) $value;

        return in_array($perPage, self::PER_PAGE_OPTIONS, true)
            ? $perPage
            : self::DEFAULT_PER_PAGE;
    }

    /** @return array{0:string,1:string} */
    public static function normalizePaidDateRange(
        mixed $start,
        mixed $end,
        mixed $legacyDate = '',
    ): array {
        $start = self::normalizeFilterDate($start);
        $end = self::normalizeFilterDate($end);
        if ($start === '' && $end === '') {
            $legacyDate = self::normalizeFilterDate($legacyDate);
            $start = $legacyDate;
            $end = $legacyDate;
        }
        if ($start !== '' && $end !== '' && $start > $end) {
            [$start, $end] = [$end, $start];
        }

        return [$start, $end];
    }

    /** @return array<string,mixed> */
    public function page(Request $request): array
    {
        $filters = $this->filters($request);
        $page = max((int) $request->query('page', 1), 1);
        $perPage = self::normalizePerPage($request->query('per_page'));
        $paginationQuery = array_filter(
            [...$filters, 'per_page' => $perPage],
            static fn (mixed $value): bool => $value !== '' && $value !== null,
        );

        try {
            $options = $this->repository->filterOptions($filters);
            if ($filters['payment_state'] !== ''
                && ! in_array($filters['payment_state'], $options['payment_states'], true)) {
                $filters['payment_state'] = '';
                unset($paginationQuery['payment_state']);
            }
            $result = $this->repository->paginate($filters, $page, $perPage);

            return [
                'processRows' => new LengthAwarePaginator(
                    $result['data'],
                    $result['total'],
                    $perPage,
                    $page,
                    ['path' => $request->url(), 'query' => $paginationQuery],
                ),
                'filters' => $filters,
                'summary' => $result['summary'],
                'documentTypes' => $options['document_types'],
                'statuses' => $options['statuses'],
                'paymentStates' => $options['payment_states'],
                'mirrorStatus' => $result['status'],
                'mirrorSyncedAt' => $result['last_synced_at'],
                'mirrorStale' => $result['sync_stale'] ?? false,
                'mirrorStaleAfterMinutes' => $result['sync_stale_after_minutes'] ?? 15,
                'scope' => $result['scope'],
                'error' => null,
            ];
        } catch (Throwable $exception) {
            report($exception);

            return [
                'processRows' => new LengthAwarePaginator([], 0, $perPage, $page, [
                    'path' => $request->url(),
                    'query' => $paginationQuery,
                ]),
                'filters' => $filters,
                'summary' => [
                    'rows' => 0,
                    'approvals' => 0,
                    'amount_total' => 0.0,
                    'bank_amount_total' => 0.0,
                ],
                'documentTypes' => [],
                'statuses' => [],
                'paymentStates' => [],
                'mirrorStatus' => 'unavailable',
                'mirrorSyncedAt' => null,
                'mirrorStale' => false,
                'mirrorStaleAfterMinutes' => 15,
                'scope' => $this->repository->scope(),
                'error' => 'OA流程镜像尚未完成导入，请稍后重试。',
            ];
        }
    }

    /** @return array<string,string> */
    private function filters(Request $request): array
    {
        $status = DingProcessDetailMirrorRepository::normalizeStatusFilter(
            $request->query('status', ''),
        );
        [$paidStart, $paidEnd] = self::normalizePaidDateRange(
            $request->query('paid_start'),
            $request->query('paid_end'),
            $request->query('paid_date'),
        );
        $paymentState = DingProcessDetailMirrorRepository::normalizePaymentStateFilter(
            $request->query('payment_state'),
        );

        return [
            'paid_start' => $paidStart,
            'paid_end' => $paidEnd,
            'document_type' => mb_substr(trim((string) $request->query('document_type', '')), 0, 100),
            'status' => mb_substr($status, 0, 20),
            'payment_state' => $paymentState,
            'business_id' => mb_substr(trim((string) $request->query('business_id', '')), 0, 32),
            'originator_name' => mb_substr(trim((string) $request->query('originator_name', '')), 0, 100),
            'keyword' => mb_substr(trim((string) $request->query('keyword', '')), 0, 100),
        ];
    }

    private static function normalizeFilterDate(mixed $value): string
    {
        $date = trim((string) $value);
        if (preg_match('/^(\d{4})-(\d{2})-(\d{2})$/', $date, $parts) !== 1
            || ! checkdate((int) $parts[2], (int) $parts[3], (int) $parts[1])) {
            return '';
        }

        return $date;
    }
}