<?php

namespace Modules\EcommerceFinance\Http\Controllers;

use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\Routing\Controller;
use Modules\EcommerceFinance\Repositories\DingProcessDetailMirrorRepository;
use Modules\EcommerceFinance\Services\DingProcessDetailMirrorImporter;
use Modules\EcommerceFinance\View\ProcessDetailsPageData;
use Symfony\Component\HttpFoundation\StreamedResponse;
use Throwable;

class ProcessDetails extends Controller
{
    public function __construct(
        private readonly DingProcessDetailMirrorRepository $repository,
    ) {}

    public function show(Request $request)
    {
        $filters = $this->filters($request);
        $page = max((int) $request->query('page', 1), 1);
        $perPage = ProcessDetailsPageData::normalizePerPage($request->query('per_page'));

        try {
            $result = $this->repository->paginate($filters, $page, $perPage);
            $options = $this->repository->filterOptions();

            return view('business.pages.financial-operations.process-details', [
                'section' => ['slug' => 'process-data', 'title' => '流程数据'],
                'page' => ['slug' => 'oa-process', 'title' => 'OA流程'],
                'processRows' => new LengthAwarePaginator(
                    $result['data'],
                    $result['total'],
                    $perPage,
                    $page,
                    ['path' => $request->url(), 'query' => $request->except('page')],
                ),
                '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 view('business.pages.financial-operations.process-details', [
                'section' => ['slug' => 'process-data', 'title' => '流程数据'],
                'page' => ['slug' => 'oa-process', 'title' => 'OA流程'],
                'processRows' => new LengthAwarePaginator([], 0, $perPage, $page, [
                    'path' => $request->url(),
                    'query' => $request->except('page'),
                ]),
                '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。',
            ]);
        }
    }

    public function export(Request $request): StreamedResponse|RedirectResponse
    {
        if (! $this->repository->ready()) {
            return redirect()
                ->route('business.pages.show', [
                    'section' => 'process-data',
                    'page' => 'oa-process',
                ])
                ->withErrors(['export' => 'OA流程镜像尚未完成导入，暂时不能导出。']);
        }

        $filters = $this->filters($request);

        return response()->streamDownload(function () use ($filters): void {
            $stream = fopen('php://output', 'wb');
            fwrite($stream, "\xEF\xBB\xBF");
            fputcsv($stream, [...DingProcessDetailMirrorImporter::HEADERS, '付款状态', '付款差额']);

            $number = 0;
            foreach ($this->repository->exportRows($filters) as $row) {
                $number++;
                fputcsv($stream, [
                    $number,
                    (string) ($row['business_id'] ?? ''),
                    (string) ($row['originator_name'] ?? ''),
                    (string) ($row['status'] ?? ''),
                    (string) ($row['document_type'] ?? ''),
                    (string) ($row['purpose'] ?? ''),
                    (int) ($row['line_no'] ?? 0),
                    (string) ($row['account_code'] ?? ''),
                    (string) ($row['account_name'] ?? ''),
                    $row['amount'] ?? '',
                    (string) ($row['bank_account_code'] ?? ''),
                    (string) ($row['bank_account_name'] ?? ''),
                    $row['bank_amount'] ?? '',
                    (string) ($row['payment_method'] ?? ''),
                    (string) ($row['paid_at'] ?? ''),
                    (string) ($row['payment_state'] ?? ''),
                    isset($row['payment_difference'])
                        ? number_format((float) $row['payment_difference'], 2, '.', '')
                        : '',
                ]);
            }

            fclose($stream);
        }, 'OA流程_' . now()->format('Ymd_His') . '.csv', [
            'Content-Type' => 'text/csv; charset=UTF-8',
        ]);
    }

    /** @return array<string,string> */
    private function filters(Request $request): array
    {
        $paidDate = trim((string) $request->query('paid_date', ''));
        $status = trim((string) $request->query('status', ''));
        $paidDateValid = preg_match('/^(\d{4})-(\d{2})-(\d{2})$/', $paidDate, $dateParts) === 1
            && checkdate((int) $dateParts[2], (int) $dateParts[3], (int) $dateParts[1]);
        $paymentState = trim((string) $request->query('payment_state', ''));
        if (! in_array($paymentState, DingProcessDetailMirrorRepository::PAYMENT_STATES, true)
            && $paymentState !== DingProcessDetailMirrorRepository::LEGACY_PAYMENT_STATE) {
            $paymentState = '';
        }

        return [
            'paid_date' => $paidDateValid ? $paidDate : '',
            '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),
        ];
    }
}