<?php

namespace App\Http\Controllers\Business;

use App\Business\CompanyPlan\CompanyPlanPageData;
use App\Business\CompanyPlan\CompanyPlanRepository;
use App\Business\CompanyPlan\CompanyPlanWorkbookExporter;
use App\Business\CompanyPlan\CompanyPlanWorkbookImporter;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;
use Illuminate\Validation\ValidationException;
use Throwable;

class CompanyPlan
{
    public function previewImport(
        Request $request,
        CompanyPlanWorkbookImporter $importer,
    ): RedirectResponse {
        $request->validate([
            'import' => ['required', 'file', 'mimes:xlsx,xls', 'max:' . (int) config('company_plan.max_upload_kb', 20480)],
            'duplicate_mode' => ['required', 'in:update,skip'],
        ]);

        $token = (string) $request->session()->get('company_plan_preview_token', '');
        if ($token !== '') {
            $importer->deletePreview($token);
        }

        try {
            $preview = $importer->preview(
                $request->file('import'),
                (int) (company_id() ?: 1),
                (int) (auth()->id() ?: 0),
                (string) $request->input('duplicate_mode', 'update'),
            );
            $token = $importer->storePreview($preview);
            $request->session()->put('company_plan_preview_token', $token);
        } catch (ValidationException $exception) {
            return $this->redirectToPage()->withErrors($exception->errors());
        } catch (Throwable $exception) {
            report($exception);

            return $this->redirectToPage()->with('error', '导入预览失败，请确认 Excel 可正常打开后重试。');
        }

        return $this->redirectToPage()->with('success', sprintf(
            '已识别“%s”：新增 %s 行，更新 %s 行，跳过 %s 行，异常 %s 行。请确认后导入。',
            $preview['source_sheet'],
            number_format($preview['new_count']),
            number_format($preview['update_count']),
            number_format($preview['skip_count']),
            number_format($preview['invalid_count']),
        ));
    }

    public function confirmImport(
        Request $request,
        CompanyPlanWorkbookImporter $importer,
    ): RedirectResponse {
        $data = $request->validate([
            'preview_token' => ['required', 'string', 'size:40'],
            'duplicate_mode' => ['required', 'in:update,skip'],
        ]);
        $sessionToken = (string) $request->session()->get('company_plan_preview_token', '');
        if ($sessionToken === '' || ! hash_equals($sessionToken, $data['preview_token'])) {
            return $this->redirectToPage()->with('error', '导入预览已失效，请重新选择文件。');
        }

        try {
            $result = $importer->confirm(
                $data['preview_token'],
                (int) (company_id() ?: 1),
                (int) (auth()->id() ?: 0),
                $data['duplicate_mode'],
            );
            $request->session()->forget('company_plan_preview_token');
        } catch (ValidationException $exception) {
            return $this->redirectToPage()->withErrors($exception->errors());
        } catch (Throwable $exception) {
            report($exception);

            return $this->redirectToPage()->with('error', '公司盘点导入失败，原有数据未改变。请检查文件后重试。');
        }

        return $this->redirectToPage()->with('success', sprintf(
            '公司盘点导入完成：新增 %s 条，更新 %s 条，跳过 %s 条。',
            number_format($result['created']),
            number_format($result['updated']),
            number_format($result['skipped']),
        ));
    }

    public function cancelImport(
        Request $request,
        CompanyPlanWorkbookImporter $importer,
    ): RedirectResponse {
        $token = (string) $request->session()->get('company_plan_preview_token', '');
        $importer->deletePreview($token);
        $request->session()->forget('company_plan_preview_token');

        return $this->redirectToPage()->with('success', '已取消本次导入，现有公司盘点数据未改变。');
    }

    public function update(
        Request $request,
        CompanyPlanRepository $repository,
        int $row,
    ): RedirectResponse {
        $validator = Validator::make($request->all(), [
            'sequence_no' => ['nullable', 'integer', 'min:0', 'max:9999999'],
            'company_name' => ['required', 'string', 'max:255'],
            'company_type' => ['nullable', 'string', 'max:128'],
            'taxpayer_type' => ['nullable', 'string', 'max:128'],
            'registered_at' => ['nullable', 'date_format:Y-m-d'],
            'business_registration_type' => ['nullable', 'string', 'max:128'],
            'unified_social_credit_code' => ['nullable', 'string', 'max:64'],
            'plan' => ['nullable', 'string', 'max:64'],
            'company_status' => ['nullable', 'string', 'max:64'],
            'tax_cancellation' => ['nullable', 'string', 'max:64'],
            'business_cancellation' => ['nullable', 'string', 'max:64'],
            'bank_cancellation' => ['nullable', 'string', 'max:64'],
            'notes' => ['nullable', 'string', 'max:5000'],
        ]);
        $data = $validator->validate();
        $companyId = (int) (company_id() ?: 1);

        if ($repository->findForCompany($companyId, $row) === null) {
            abort(404);
        }
        if ($repository->companyNameExists($companyId, (string) $data['company_name'], $row)) {
            throw ValidationException::withMessages([
                'company_name' => '另一家主体已使用该公司名称，不能产生重复记录。',
            ]);
        }

        $repository->update(
            $companyId,
            $row,
            $data,
            (int) (auth()->id() ?: 0),
        );

        return back()->with('success', '公司盘点已保存。');
    }

    public function export(
        Request $request,
        CompanyPlanRepository $repository,
        CompanyPlanWorkbookExporter $exporter,
    ) {
        $companyId = (int) (company_id() ?: 1);
        $filters = CompanyPlanPageData::filters($request);
        $rows = $repository->exportRows($companyId, $filters);
        $columns = array_values(array_filter(
            array_map('trim', explode(',', (string) $request->query('columns', ''))),
        ));

        return $exporter->download(
            $rows,
            $columns,
            '公司盘点_' . now()->format('Ymd_His') . '.xlsx',
        );
    }

    public function template(CompanyPlanWorkbookExporter $exporter)
    {
        return $exporter->download(
            [],
            array_column(CompanyPlanRepository::FIELDS, 'name'),
            '公司盘点导入模板.xlsx',
        );
    }

    private function redirectToPage(): RedirectResponse
    {
        $query = request()->except(['_token', 'import', 'duplicate_mode', 'preview_token', '_method']);

        return redirect()->route('business.pages.show', array_filter([
            'section' => 'company-management',
            'page' => 'company-plan',
            ...$query,
        ], static fn (mixed $value): bool => $value !== null && $value !== ''));
    }
}