<?php

namespace App\Http\Controllers\Portal;

use App\Models\Common\Contact;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Routing\Controller;
use Illuminate\View\View;
use Modules\EcommerceFinance\Services\SupplierReturnCsvExporter;
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;
use Symfony\Component\HttpFoundation\StreamedResponse;

/**
 * 厂家门户：账号绑定供应商后，仅可查看和操作自己的对账数据。
 */
class SupplierReconciliation extends Controller
{
    public function __construct(
        private readonly SupplierStatementTemplate $template,
        private readonly SupplierStatementStore $statements,
        private readonly SupplierReturnConfirmation $returnConfirmations,
        private readonly SupplierReconciliationPageData $pageData,
        private readonly SupplierReturnCsvExporter $returnCsvExporter,
    ) {
    }

    public function index(): View
    {
        [$contact, $supplier, $companyId] = $this->supplierContext();
        $data = $this->pageData->portalData($supplier, $companyId);

        return view('portal.supplier-reconciliation.index', array_merge($data, [
            'contact' => $contact,
            'supplier' => $supplier,
            'statementTemplateUrl' => route('portal.supplier-reconciliation.template'),
            'uploadUrl' => route('portal.supplier-reconciliation.statement.upload'),
            'returnConfirmUrl' => route('portal.supplier-reconciliation.return.confirm'),
            'returnDisputeUrl' => route('portal.supplier-reconciliation.return.dispute'),
            'returnConfirmAllUrl' => route('portal.supplier-reconciliation.return.confirm-all'),
        ]));
    }

    public function template(): BinaryFileResponse
    {
        $this->supplierContext();
        $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, $companyId] = $this->supplierContext();

        $records = $this->template->parse($request->file('import'), $supplier);
        $rows = $this->statements->save(
            $supplier,
            $records,
            (string) $request->file('import')->getClientOriginalName(),
            $companyId,
            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])
            : redirect()
                ->route('portal.supplier-reconciliation.index', ['company_id' => $companyId])
                ->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->supplierContext();
        $keys = array_values(array_map(
            static fn (array $row): string => (string) ($row['_action_key'] ?? ''),
            $this->pageData->returnRowsForFilters($supplier, $companyId, $request->all()),
        ));
        $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）。");
    }

    public function exportReturns(Request $request): StreamedResponse
    {
        [, $supplier, $companyId] = $this->supplierContext();
        $rows = $this->pageData->returnRowsForFilters($supplier, $companyId, $request->query());

        return $this->returnCsvExporter->download($rows, $supplier);
    }

    private function markReturn(Request $request, string $status, string $message): RedirectResponse
    {
        $request->validate(['key' => ['required', 'string', 'max:191']]);
        [, $supplier, $companyId] = $this->supplierContext();
        $key = (string) $request->input('key');
        $owned = collect($this->pageData->returnRows($supplier, $companyId))
            ->contains(static fn (array $row): bool => (string) ($row['_action_key'] ?? '') === $key);
        abort_unless($owned, 403, '该退货明细不属于当前厂家账号。');

        $this->returnConfirmations->mark(
            $supplier,
            $key,
            $status,
            $companyId,
            user_id() ? (int) user_id() : null,
        );

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

    /** @return array{0:Contact,1:string,2:int} */
    private function supplierContext(): array
    {
        $contact = user()->contact;
        abort_unless(
            $contact instanceof Contact
                && $contact->type === Contact::VENDOR_TYPE
                && $contact->enabled,
            403,
            '当前账号未绑定有效的厂家资料，请联系财务人员。',
        );

        $supplier = trim((string) $contact->name);
        abort_if($supplier === '', 403, '当前厂家账号未设置供应商名称，请联系财务人员。');

        return [$contact, $supplier, (int) (company_id() ?: 1)];
    }
}