#!/bin/bash
set -e

# ╔═══════════════════════════════════════════════════════════════════════════╗
# ║                    HiFastVPN macOS DMG 打包脚本                              ║
# ║                                                                           ║
# ║  使用方法:                                                                  ║
# ║    1. 确保已经运行 sign_and_notarize.sh 生成签名的 .app                     ║
# ║    2. chmod +x build_dmg.sh                                               ║
# ║    3. ./build_dmg.sh                                                      ║
# ╚═══════════════════════════════════════════════════════════════════════════╝

# ======================== 路径配置 ========================
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_DIR="$(dirname "$SCRIPT_DIR")"

APP_PATH="${PROJECT_DIR}/build/macos/Build/Products/Debug/HiFastVPN.app"
BACKGROUND_IMAGE="${SCRIPT_DIR}/assets/dmg_bg.png"

# ======================== 提取版本号 ========================
echo "╔═══════════════════════════════════════════════════════════════════╗"
echo "║              HiFastVPN macOS DMG 打包脚本                          ║"
echo "╚═══════════════════════════════════════════════════════════════════╝"
echo ""

PUBSPEC_PATH="${PROJECT_DIR}/pubspec.yaml"
if [ ! -f "${PUBSPEC_PATH}" ]; then
    echo "❌ 错误: 找不到 pubspec.yaml"
    exit 1
fi

VERSION=$(grep "^version:" "${PUBSPEC_PATH}" | sed 's/version: *//' | tr -d ' ')
if [ -z "${VERSION}" ]; then
    echo "❌ 错误: 无法提取版本号"
    exit 1
fi

echo "📦 版本号: ${VERSION}"
echo "📁 项目目录: ${PROJECT_DIR}"
echo "📦 应用路径: ${APP_PATH}"
echo "🖼️  背景图: ${BACKGROUND_IMAGE}"
echo ""

# ======================== 检查依赖 ========================
if ! command -v create-dmg >/dev/null 2>&1; then
    echo "❌ 错误: create-dmg 未安装（brew install create-dmg）"
    exit 1
fi

if [ ! -d "${APP_PATH}" ]; then
    echo "❌ 错误: HiFastVPN.app 不存在"
    exit 1
fi

if [ ! -f "${BACKGROUND_IMAGE}" ]; then
    echo "❌ 错误: 背景图不存在"
    exit 1
fi

# ======================== 校验背景图尺寸 ========================
BG_INFO=$(sips -g pixelWidth -g pixelHeight "${BACKGROUND_IMAGE}")
BG_W=$(echo "$BG_INFO" | awk '/pixelWidth/ {print $2}')
BG_H=$(echo "$BG_INFO" | awk '/pixelHeight/ {print $2}')

if [ "$BG_W" != "1200" ] || [ "$BG_H" != "800" ]; then
    echo "❌ 背景图必须是 1200x800，当前是 ${BG_W}x${BG_H}"
    exit 1
fi

# ======================== 输出目录 ========================
OUTPUT_DIR="${PROJECT_DIR}/dist/${VERSION}"
mkdir -p "${OUTPUT_DIR}"

DMG_NAME="HiFastVPN-${VERSION}.dmg"
DMG_PATH="${OUTPUT_DIR}/${DMG_NAME}"

echo "📂 输出目录: ${OUTPUT_DIR}"
echo "💿 DMG 文件: ${DMG_NAME}"
echo ""

rm -f "${DMG_PATH}"

# ======================== 创建 DMG ========================
echo "💿 开始创建 DMG..."
echo ""

TEMP_DIR=$(mktemp -d)
cp -R "${APP_PATH}" "${TEMP_DIR}/"

# ======================== Finder 坐标（左上原点，中心点对齐） ========================
# 背景：1200 × 800
# HiFastVPN.app 中心：左 228, 上 418, 尺寸 168×168
APP_CENTER_X=236
APP_CENTER_Y=428
APP_ICON_SIZE=152
APP_X=$((APP_CENTER_X + APP_ICON_SIZE / 2))  # 左上角坐标
APP_Y=$((APP_CENTER_Y + APP_ICON_SIZE / 2))

# Applications 图标中心：左 742, 上 372, 尺寸 259×259
DROP_CENTER_X=702
DROP_CENTER_Y=372
DROP_ICON_SIZE=259
DROP_X=$((DROP_CENTER_X + DROP_ICON_SIZE / 2))
DROP_Y=$((DROP_CENTER_Y + DROP_ICON_SIZE / 2))

# ======================== 打包 ========================
create-dmg \
  --volname "HiFastVPN Installation" \
  --background "${BACKGROUND_IMAGE}" \
  --window-size 1200 800 \
  --icon-size "${APP_ICON_SIZE}" \
  --icon "HiFastVPN.app" "${APP_X}" "${APP_Y}" \
  --app-drop-link "${DROP_X}" "${DROP_Y}" \
  --hide-extension "HiFastVPN.app" \
  --no-internet-enable \
  "${DMG_PATH}" \
  "${TEMP_DIR}"

# 清理临时目录
rm -rf "${TEMP_DIR}"

# ======================== 完成 ========================
echo ""
echo "╔═══════════════════════════════════════════════════════════════════╗"
echo "║                        🎉 DMG 创建完成！                           ║"
echo "╚═══════════════════════════════════════════════════════════════════╝"
echo ""
echo "输出文件:"
echo "  💿 ${DMG_PATH}"
echo ""
echo "📝 注意事项:"
echo "  • DMG 已保存到 dist/${VERSION}/ 目录"
echo "  • 图标和 Applications 已按设计稿中心点对齐"
echo "  • 此 DMG 包含已签名和公证的 .app"
echo "  • 可以直接分发给用户使用"
echo ""