<?php

namespace App\Http\Controllers\Business;

use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Routing\Controller;
use Modules\EcommerceFinance\Services\SupplierReturnConfirmation;
use Modules\EcommerceFinance\Services\SupplierStatementStore;
use Modules\EcommerceFinance\Services\SupplierStatementTemplate;
use Modules\EcommerceFinance\View\SupplierReconciliationPageData;
use Symfony\Component\HttpFoundation\BinaryFileResponse;

/**
 * 供应商对账：对账单模板下载 + 厂家对账单上传（严格按模板校验）。
 */
class SupplierReconciliation extends Controller
{
    public function __construct(
        private readonly SupplierStatementTemplate $template,
        private readonly SupplierStatementStore $statements,
        private readonly SupplierReturnConfirmation $returnConfirmations,
        private readonly SupplierReconciliationPageData $pageData,
    ) {
        $this->middleware('auth');
        $this->middleware('company.identify');
    }

    public function template(): BinaryFileResponse
    {
        $path = $this->template->path();
        abort_unless(is_file($path), 404, '对账单模板不存在。');

        return response()->download($path, $this->template->filename());
    }

    public function upload(Request $request): JsonResponse|RedirectResponse
    {
        $request->validate([
            'import' => ['required', 'file', 'mimes:xlsx,xls,csv', 'max:51200'],
            'supplier' => ['required', 'string', 'max:191'],
        ]);

        $supplier = trim((string) $request->input('supplier'));
        if ($supplier === '') {
            abort(422, '请选择厂家。');
        }

        $records = $this->template->parse($request->file('import'), $supplier);
        $rows = $this->statements->save(
            $supplier,
            $records,
            (string) $request->file('import')->getClientOriginalName(),
            (int) (company_id() ?: 1),
            user_id() ? (int) user_id() : null,
        );

        $message = "对账单已保存：{$supplier} 共 {$rows} 行。";

        return $request->expectsJson()
            ? response()->json(['message' => $message, 'rows' => $rows])
            : back()->with('success', $message);
    }

    public function confirmReturn(Request $request): RedirectResponse
    {
        return $this->markReturn($request, SupplierReturnConfirmation::STATUS_CONFIRMED, '已确认该行退货扣减。');
    }

    public function disputeReturn(Request $request): RedirectResponse
    {
        return $this->markReturn($request, SupplierReturnConfirmation::STATUS_DISPUTED, '已提交异议，复核通过前该行暂不扣减。');
    }

    public function confirmAllReturns(Request $request): RedirectResponse
    {
        [$supplier, $companyId] = $this->returnTarget($request);
        $keys = array_values(array_map(
            static fn (array $row): string => (string) ($row['_action_key'] ?? ''),
            $this->pageData->returnRows($supplier, $companyId),
        ));
        $confirmed = $this->returnConfirmations->confirmAll(
            $supplier,
            $keys,
            $companyId,
            user_id() ? (int) user_id() : null,
        );

        return back()->with('success', "已全部确认：{$confirmed} 行退货扣减生效（异议行保持暂不扣减）。");
    }

    private function markReturn(Request $request, string $status, string $message): RedirectResponse
    {
        $request->validate(['key' => ['required', 'string', 'max:191']]);
        [$supplier, $companyId] = $this->returnTarget($request);
        $this->returnConfirmations->mark(
            $supplier,
            (string) $request->input('key'),
            $status,
            $companyId,
            user_id() ? (int) user_id() : null,
        );

        return back()->with('success', $message);
    }

    /** @return array{0:string,1:int} */
    private function returnTarget(Request $request): array
    {
        $request->validate(['supplier' => ['required', 'string', 'max:191']]);

        return [trim((string) $request->input('supplier')), (int) (company_id() ?: 1)];
    }
}