const { PNG } = require('pngjs');
const fs = require('fs');
const path = require('path');

const SIZE = 81;
const INACTIVE_COLOR = [148, 163, 184]; // #94a3b8
const ACTIVE_COLOR = [16, 185, 129];    // #10b981

// 创建 PNG 图标
function createIcon(draw, color) {
  const png = new PNG({ width: SIZE, height: SIZE });
  const data = png.data;
  
  // 填充透明背景
  for (let y = 0; y < SIZE; y++) {
    for (let x = 0; x < SIZE; x++) {
      const idx = (SIZE * y + x) << 2;
      data[idx] = 0;
      data[idx + 1] = 0;
      data[idx + 2] = 0;
      data[idx + 3] = 0;
    }
  }
  
  // 绘制图标
  draw(png, color);
  
  return PNG.sync.write(png);
}

// 绘制像素
function setPixel(png, x, y, color, alpha = 255) {
  const idx = (SIZE * y + x) << 2;
  png.data[idx] = color[0];
  png.data[idx + 1] = color[1];
  png.data[idx + 2] = color[2];
  png.data[idx + 3] = alpha;
}

// 绘制圆角矩形
function drawRoundRect(png, x, y, w, h, r, color) {
  for (let dy = 0; dy < h; dy++) {
    for (let dx = 0; dx < w; dx++) {
      const px = x + dx;
      const py = y + dy;
      
      // 检查是否在圆角内
      let inCorner = false;
      if (dx < r && dy < r) {
        // 左上角
        const dist = Math.sqrt((r - dx - 1) ** 2 + (r - dy - 1) ** 2);
        inCorner = dist > r;
      } else if (dx >= w - r && dy < r) {
        // 右上角
        const dist = Math.sqrt((dx - w + r) ** 2 + (r - dy - 1) ** 2);
        inCorner = dist > r;
      } else if (dx < r && dy >= h - r) {
        // 左下角
        const dist = Math.sqrt((r - dx - 1) ** 2 + (dy - h + r) ** 2);
        inCorner = dist > r;
      } else if (dx >= w - r && dy >= h - r) {
        // 右下角
        const dist = Math.sqrt((dx - w + r) ** 2 + (dy - h + r) ** 2);
        inCorner = dist > r;
      }
      
      if (!inCorner) {
        setPixel(png, px, py, color);
      }
    }
  }
}

// 绘制圆形
function drawCircle(png, cx, cy, r, color) {
  for (let y = -r; y <= r; y++) {
    for (let x = -r; x <= r; x++) {
      if (x * x + y * y <= r * r) {
        setPixel(png, cx + x, cy + y, color);
      }
    }
  }
}

// 绘制矩形
function drawRect(png, x, y, w, h, color) {
  for (let dy = 0; dy < h; dy++) {
    for (let dx = 0; dx < w; dx++) {
      setPixel(png, x + dx, y + dy, color);
    }
  }
}

// 工作台图标 - 网格
function drawWork(png, color) {
  const s = 12; // 间距
  const b = 16; // 方块大小
  const ox = 18; // 偏移
  const oy = 18;
  
  drawRoundRect(png, ox, oy, b, b, 3, color);
  drawRoundRect(png, ox + b + s, oy, b, b, 3, color);
  drawRoundRect(png, ox, oy + b + s, b, b, 3, color);
  drawRoundRect(png, ox + b + s, oy + b + s, b, b, 3, color);
}

// 订单图标 - 清单
function drawOrder(png, color) {
  const x = 22, y = 16, w = 36, h = 48;
  
  // 外框
  drawRoundRect(png, x, y, w, h, 4, color);
  
  // 内部线条（用背景色）
  const bgColor = [0, 0, 0];
  drawRect(png, x + 8, y + 12, 20, 3, bgColor);
  drawRect(png, x + 8, y + 22, 16, 3, bgColor);
  drawRect(png, x + 8, y + 32, 18, 3, bgColor);
}

// 设备图标 - 盒子
function drawDevice(png, color) {
  const x = 18, y = 22, w = 44, h = 36;
  
  drawRoundRect(png, x, y, w, h, 6, color);
  
  // 屏幕
  const bgColor = [0, 0, 0];
  drawRoundRect(png, x + 6, y + 6, w - 12, h - 12, 3, bgColor);
  
  // 底座
  drawRect(png, x + 16, y + h, 12, 6, color);
  drawRect(png, x + 10, y + h + 6, 24, 3, color);
}

// 我的图标 - 人形
function drawMy(png, color) {
  // 头部
  drawCircle(png, 40, 26, 12, color);
  
  // 身体
  drawRoundRect(png, 20, 42, 40, 24, 10, color);
}

// 生成图标
const icons = [
  { name: 'work', draw: drawWork },
  { name: 'order', draw: drawOrder },
  { name: 'device', draw: drawDevice },
  { name: 'my', draw: drawMy },
];

const outputDir = path.join(__dirname, '../src/static/tabbar');

icons.forEach(({ name, draw }) => {
  // 普通状态
  const inactivePng = createIcon(draw, INACTIVE_COLOR);
  fs.writeFileSync(path.join(outputDir, `${name}.png`), inactivePng);
  console.log(`Created ${name}.png`);
  
  // 选中状态
  const activePng = createIcon(draw, ACTIVE_COLOR);
  fs.writeFileSync(path.join(outputDir, `${name}-active.png`), activePng);
  console.log(`Created ${name}-active.png`);
});

console.log('All icons generated!');