<?php

namespace Modules\EcommerceFinance\Services;

use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Style\Alignment;
use PhpOffice\PhpSpreadsheet\Style\Border;
use PhpOffice\PhpSpreadsheet\Style\Fill;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
use Symfony\Component\HttpFoundation\StreamedResponse;

class SupplierPayableImportTemplate
{
    /** @param array<string,array{label:string,type:string}> $fields */
    public function download(string $title, array $fields, bool $optionalRecordKey = false): StreamedResponse
    {
        return response()->streamDownload(function () use ($title, $fields, $optionalRecordKey): void {
            $spreadsheet = new Spreadsheet();
            $sheet = $spreadsheet->getActiveSheet();
            $sheet->setTitle($this->sheetTitle($title));

            $headers = array_merge(['记录标识'], array_column($fields, 'label'));
            $sheet->fromArray($headers, null, 'A1');
            $lastColumn = Coordinate::stringFromColumnIndex(count($headers));
            $headerRange = 'A1:' . $lastColumn . '1';

            $sheet->getStyle($headerRange)->applyFromArray([
                'font' => ['bold' => true, 'color' => ['rgb' => 'FFFFFF']],
                'fill' => ['fillType' => Fill::FILL_SOLID, 'startColor' => ['rgb' => '856632']],
                'alignment' => ['horizontal' => Alignment::HORIZONTAL_CENTER, 'vertical' => Alignment::VERTICAL_CENTER],
                'borders' => ['allBorders' => ['borderStyle' => Border::BORDER_THIN, 'color' => ['rgb' => 'D8D2C7']]],
            ]);
            $sheet->getRowDimension(1)->setRowHeight(24);
            $sheet->freezePane('A2');
            $sheet->setAutoFilter($headerRange);
            $sheet->getColumnDimension('A')->setWidth(38);

            $columnIndex = 2;
            foreach ($fields as $definition) {
                $column = Coordinate::stringFromColumnIndex($columnIndex);
                $width = max(14, min(30, mb_strlen($definition['label']) * 2 + 4));
                $sheet->getColumnDimension($column)->setWidth($width);
                if ($definition['type'] === 'number') {
                    $sheet->getStyle($column . '2:' . $column . '10001')->getNumberFormat()->setFormatCode('0.0000');
                } else {
                    $sheet->getStyle($column . '2:' . $column . '10001')->getNumberFormat()->setFormatCode('@');
                }
                $columnIndex++;
            }
            $sheet->getStyle('A2:A10001')->getNumberFormat()->setFormatCode('@');

            $instructions = $spreadsheet->createSheet();
            $instructions->setTitle('填写说明');
            $instructions->fromArray([
                ['项目', '说明'],
                ['记录标识', $optionalRecordKey
                    ? '选填。留空表示新增一行；需要修改已导入的行时，请先导出、修改后再导入。'
                    : '必填。请从本页面导出的文件中复制，不能修改。'],
                ['日期', '请填写 YYYY-MM-DD，例如 2026-09-17。'],
                ['月份', '请填写 YYYY-MM，例如 2026-09。'],
                ['数字', '最多支持 4 位小数；金额可直接填写数字。'],
                ['空白单元格', '导入后将清空该字段，请确认后再导入。'],
            ], null, 'A1');
            $instructions->getStyle('A1:B1')->applyFromArray([
                'font' => ['bold' => true, 'color' => ['rgb' => 'FFFFFF']],
                'fill' => ['fillType' => Fill::FILL_SOLID, 'startColor' => ['rgb' => '856632']],
            ]);
            $instructions->getColumnDimension('A')->setWidth(18);
            $instructions->getColumnDimension('B')->setWidth(58);
            $instructions->getStyle('A1:B6')->getAlignment()->setVertical(Alignment::VERTICAL_CENTER)->setWrapText(true);
            foreach (range(1, 6) as $row) {
                $instructions->getRowDimension($row)->setRowHeight($row === 1 ? 24 : 32);
            }

            $spreadsheet->setActiveSheetIndex(0);
            (new Xlsx($spreadsheet))->save('php://output');
            $spreadsheet->disconnectWorksheets();
        }, $title . '_导入模板_' . now()->format('Ymd') . '.xlsx', [
            'Content-Type' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
            'Cache-Control' => 'private, no-store',
        ]);
    }

    private function sheetTitle(string $title): string
    {
        $title = str_replace(['\\', '/', '?', '*', '[', ']', ':'], '', $title) ?: '导入模板';

        return mb_substr($title, 0, 31);
    }
}