<?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 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 = 50;

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

            return view('business.pages.financial-operations.process-details', [
                'section' => ['slug' => 'financial-operations', 'title' => '财务经营报表'],
                'page' => ['slug' => 'process-details', 'title' => '流程明细'],
                'processRows' => new LengthAwarePaginator(
                    $result['data'],
                    $result['total'],
                    $perPage,
                    $page,
                    ['path' => $request->url(), 'query' => $request->except('page')],
                ),
                'filters' => $filters,
                'summary' => $result['summary'],
                'months' => $options['months'],
                'documentTypes' => $options['document_types'],
                'statuses' => $options['statuses'],
                'mirrorStatus' => $result['status'],
                'mirrorSyncedAt' => $result['last_synced_at'],
                'scope' => $result['scope'],
                'error' => null,
            ]);
        } catch (Throwable $exception) {
            report($exception);

            return view('business.pages.financial-operations.process-details', [
                'section' => ['slug' => 'financial-operations', 'title' => '财务经营报表'],
                'page' => ['slug' => 'process-details', 'title' => '流程明细'],
                '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,
                ],
                'months' => [],
                'documentTypes' => [],
                'statuses' => [],
                'mirrorStatus' => 'unavailable',
                'mirrorSyncedAt' => null,
                'scope' => $this->repository->scope(),
                'error' => '流程明细镜像尚未完成导入，请稍后重试。',
            ]);
        }
    }

    public function export(Request $request): StreamedResponse|RedirectResponse
    {
        if (! $this->repository->ready()) {
            return redirect()
                ->route('business.pages.show', [
                    'section' => 'financial-operations',
                    'page' => 'process-details',
                ])
                ->withErrors(['export' => '流程明细镜像尚未完成导入，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);

            $number = 0;
            foreach ($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'] ?? ''),
                ]);
            }

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

    /** @return array<string,string> */
    private function filters(Request $request): array
    {
        $month = trim((string) $request->query('month', ''));
        $status = trim((string) $request->query('status', ''));

        return [
            'month' => preg_match('/^\d{4}-\d{2}$/', $month) === 1 ? $month : '',
            'document_type' => mb_substr(trim((string) $request->query('document_type', '')), 0, 100),
            'status' => mb_substr($status, 0, 20),
            '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),
        ];
    }
}