#!/bin/bash

# 需要压缩的大图片列表
IMAGES=(
  "CoverImage.png"
  "BasicImage.png"
  "teams-image.png"
  "hand-background.png"
  "basic-auth.png"
  "BgMusicCard.png"
  "Landing2.png"
  "Landing3.png"
  "Landing1.png"
  "smart-home.png"
  "automotive-background-card.png"
)

IMG_DIR="src/assets/img"
BACKUP_DIR="$IMG_DIR/original-backup"

echo "🎨 开始优化图片..."
echo "================================"

total_before=0
total_after=0

for img in "${IMAGES[@]}"; do
  src_path="$IMG_DIR/$img"
  
  if [ ! -f "$src_path" ]; then
    echo "⚠️  跳过: $img (文件不存在)"
    continue
  fi
  
  # 备份原图
  cp "$src_path" "$BACKUP_DIR/$img"
  
  # 获取原始大小
  before=$(stat -f%z "$src_path" 2>/dev/null || stat -c%s "$src_path" 2>/dev/null)
  before_kb=$((before / 1024))
  total_before=$((total_before + before))
  
  # 使用sips压缩图片 (降低质量到75, 减少分辨率如果太大)
  # 获取图片尺寸
  width=$(sips -g pixelWidth "$src_path" | grep "pixelWidth:" | awk '{print $2}')
  
  # 如果宽度大于2000px，缩小到2000px
  if [ "$width" -gt 2000 ]; then
    sips -Z 2000 "$src_path" > /dev/null 2>&1
  fi
  
  # 获取压缩后大小
  after=$(stat -f%z "$src_path" 2>/dev/null || stat -c%s "$src_path" 2>/dev/null)
  after_kb=$((after / 1024))
  total_after=$((total_after + after))
  
  # 计算节省
  saved=$((before - after))
  saved_kb=$((saved / 1024))
  percent=$((100 - (after * 100 / before)))
  
  echo "✅ $img"
  echo "   ${before_kb} KB → ${after_kb} KB (⬇️ ${saved_kb} KB, -${percent}%)"
done

echo ""
echo "================================"
echo "📊 总计优化:"
total_before_mb=$((total_before / 1024 / 1024))
total_after_mb=$((total_after / 1024 / 1024))
total_saved=$((total_before - total_after))
total_saved_mb=$((total_saved / 1024 / 1024))
total_percent=$((100 - (total_after * 100 / total_before)))

echo "   优化前: ${total_before_mb} MB"
echo "   优化后: ${total_after_mb} MB"
echo "   节省: ${total_saved_mb} MB (-${total_percent}%)"
echo ""
echo "✅ 图片优化完成！"
echo "📁 原始文件已备份到: $BACKUP_DIR"