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@main def drawTextOnImage(): Unit = {
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  // 创建一个空白图片
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  val width = 500
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  val height = 500
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  val bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB)
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  // 获取图片的 Graphics2D 对象
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  val g2d: Graphics2D = bufferedImage.createGraphics()
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  // 启用抗锯齿
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  g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)
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  g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON)
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  // 设置背景颜色并清空图片
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  g2d.setColor(Color.WHITE)
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  g2d.fillRect(0, 0, width, height)
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  // 设置文字颜色和字体
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  g2d.setColor(Color.BLACK)
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  g2d.setFont(new Font("LXGW WenKai Screen", Font.PLAIN, 28))
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  // 在图片上绘制文字
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  val text = "你好世界"
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  val x = 100
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  val y = 100
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  g2d.drawString(text, x, y)
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  // 释放 Graphics2D 对象
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  g2d.dispose()
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  // 保存图片到文件
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  val outPutFile = new File("src/main/scala/img/output.png")
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  ImageIO.write(bufferedImage, "png", outPutFile)
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  println("保存成功！")
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}

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@main def addTextToImage(): Unit = {
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  // 读取已有的图片
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  val inputFile = new File("src/main/scala/img/input.jpg")
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  val bufferedImage = ImageIO.read(inputFile)
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  // 获取图片的 Graphics2D 对象
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  val g2d: Graphics2D = bufferedImage.createGraphics()
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  // 启用抗锯齿
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  g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)
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  g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON)
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  // 标题和内容
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  // val title = "大凶"
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  // val content = "内心丰富多彩的一天"
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  val title = "全体運"
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  val content = "能用善良的语言让周围的人感到幸福的日子"
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  // 获取图片的宽度和高度
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  val imgWidth = bufferedImage.getWidth / 2
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  val imgHeight = bufferedImage.getHeight
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  // 根据百分比计算标题的位置
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  val titleX = title.length match
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    case length if length == 3 => (imgWidth * 0.39).toInt
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    case length if length >= 2 => (imgWidth * 0.46).toInt
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    case _ => (imgWidth * 0.525).toInt
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  val titleY = 108
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  // 设置文字颜色和字体
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  // g2d.setColor(Color(255, 255, 255))
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  g2d.setFont(new Font("LXGW WenKai Screen", Font.PLAIN, 30))
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  // 创建渐变色
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  var gradient = GradientPaint(
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    // 起始点和颜色
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    titleX, titleY, Color.RED,
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    // 结束点和颜色
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    titleX + 100, titleY, Color.BLUE
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  )
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  // 设置渐变色为绘图颜色
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  g2d.setPaint(gradient)
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  g2d.drawString(title, titleX, titleY)
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  // 根据百分比计算内容的起始位置
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  var contentX = content.length match
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    case length if length >= 19 => (imgWidth * 0.39).toInt
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    case length if length >= 10 => (imgWidth * 0.47).toInt
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    case _ => (imgWidth * 0.54).toInt
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  var contentY = (imgHeight * 0.4).toInt
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  // g2d.setColor(Color(50, 50, 50))
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  g2d.setFont(new Font("LXGW WenKai Screen", Font.PLAIN, 23))
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  // 获取行高
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  val lineHeight = g2d.getFontMetrics.getHeight
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  // 绘制内容（竖着排列并根据内容长度适当换行）
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  val colorX = contentX
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  val colorY = contentY
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  for (char <- content) {
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    gradient = GradientPaint(
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      colorX, colorY, Color(0, 0, 0),
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      contentX, contentY + 200, Color(250, 208, 196)
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    )
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    g2d.setPaint(gradient)
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    g2d.drawString(char.toString, contentX, contentY)
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    contentY += lineHeight
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    if (contentY >= (imgHeight * 0.9).toInt) {
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      contentY = (imgHeight * 0.4).toInt
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      contentX += (imgWidth * 0.15).toInt
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    }
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  }
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  // 释放 Graphics2D 对象
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  g2d.dispose()
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  // 保存图片到文件
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  val outPutFile = new File("src/main/scala/img/output.jpg")
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  ImageIO.write(bufferedImage, "jpg", outPutFile)
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  println("保存成功！")
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}