// 方向校准卡（Windows Pavo 直打校准用）：642×1014 纵向，四角 ▲■●◆ + 中央大写 F + 左右箭头。
// 打一张即可从 8 种变换（4 旋转 × 2 镜像）中唯一定出打印机的实际映射。
//
// 用法（在项目根目录）：
//   dart run tool/make_test_card.dart            # 只生成 build/calibration_card.png
//   dart run tool/make_test_card.dart --print    # 生成并直接 POST 到本机助手打印一张
//
// 放卡方式与正式打印一致：打印面朝上、文字对着自己。
import 'dart:convert';
import 'dart:io';

import 'package:image/image.dart';

Future<void> main(List<String> args) async {
  final doPrint = args.contains('--print');
  final black = ColorRgb8(0, 0, 0);
  final img = Image(width: 642, height: 1014);
  fill(img, color: ColorRgb8(255, 255, 255));

  // 边框（四边留 6px）
  drawRect(img, x1: 6, y1: 6, x2: 635, y2: 1007, color: ColorRgb8(0, 120, 215));

  // 四角标记（各不相同，一印即辨）
  // 左上：实心三角 ▲
  fillPolygon(img, vertices: [Point(40, 40), Point(150, 40), Point(40, 150)], color: black);
  drawString(img, 'LT', font: arial14, x: 44, y: 158, color: black);
  // 右上：实心方块 ■
  fillRect(img, x1: 492, y1: 40, x2: 602, y2: 150, color: black);
  drawString(img, 'RT', font: arial14, x: 500, y: 158, color: black);
  // 左下：实心圆 ●
  fillCircle(img, x: 95, y: 930, radius: 55, color: black);
  drawString(img, 'LB', font: arial14, x: 44, y: 856, color: black);
  // 右下：实心菱形 ◆
  fillPolygon(img, vertices: [Point(547, 860), Point(602, 930), Point(547, 1000), Point(492, 930)], color: black);
  drawString(img, 'RB', font: arial14, x: 560, y: 1004, color: black);

  // 中部超大 F（旋转/镜像一票判别）
  // arial 字体最大 48 号，642 宽卡面已足够醒目
  drawString(img, 'F', font: arial48, x: 300, y: 520, color: black);

  // 左右语义标注 + 箭头线
  drawString(img, '<-LEFT', font: arial24, x: 60, y: 430, color: black);
  drawString(img, 'RIGHT->', font: arial24, x: 440, y: 430, color: black);
  drawLine(img, x1: 180, y1: 340, x2: 440, y2: 340, color: black, thickness: 8);
  fillPolygon(img, vertices: [Point(440, 320), Point(490, 340), Point(440, 360)], color: black);
  drawString(img, 'CALIB 0923', font: arial14, x: 180, y: 312, color: black);

  final png = encodePng(img);
  final out = 'build/calibration_card.png';
  final file = File(out);
  await file.parent.create(recursive: true);
  await file.writeAsBytes(png);
  // ignore: avoid_print
  print('written $out (${png.length} bytes)');

  if (doPrint) {
    final b64 = base64Encode(png);
    final body = jsonEncode({
      'copies': 1,
      'front': {'color': 'data:image/png;base64,$b64'},
    });
    final client = HttpClient();
    try {
      final req = await client.postUrl(Uri.parse('http://127.0.0.1:38200/api/card-printer/print'));
      req.headers.contentType = ContentType.json;
      req.write(body);
      final res = await req.close();
      final text = await res.transform(utf8.decoder).join();
      // ignore: avoid_print
      print('print -> ${res.statusCode} $text');
      // ignore: avoid_print
      print('任务已提交；等打印机出卡后查看方向（四角标记：LT三角 RT方块 LB圆 RB菱形，中央大F）');
    } finally {
      client.close();
    }
  }
}