#!/bin/bash
# Novalon 静态站点部署脚本
# 用法: bash scripts/deploy-static.sh [环境]
# 环境参数: production (默认)

set -euo pipefail

ENV="${1:-production}"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
BUILD_DIR="$PROJECT_DIR/dist"
DEPLOY_DIR="/var/www/novalon"
BACKUP_DIR="/var/www/novalon-backup"
TIMESTAMP=$(date +%Y%m%d_%H%M%S)

echo "========================================="
echo "  Novalon 静态站点部署"
echo "  环境: $ENV"
echo "  时间: $(date '+%Y-%m-%d %H:%M:%S')"
echo "========================================="

# 步骤 1: 构建
echo ""
echo "[1/5] 构建静态站点..."
cd "$PROJECT_DIR"
npm run build

if [ ! -d "$BUILD_DIR" ]; then
    echo "❌ 构建失败：dist 目录不存在"
    exit 1
fi

echo "✅ 构建完成，产物大小：$(du -sh "$BUILD_DIR" | cut -f1)"

# 步骤 2: 备份当前版本
echo ""
echo "[2/5] 备份当前版本..."
if [ -d "$DEPLOY_DIR" ]; then
    mkdir -p "$BACKUP_DIR"
    cp -r "$DEPLOY_DIR" "$BACKUP_DIR/novalon-backup-$TIMESTAMP"
    # 只保留最近 3 个备份
    ls -t "$BACKUP_DIR"/ | tail -n +4 | xargs -I {} rm -rf "$BACKUP_DIR/{}"
    echo "✅ 备份完成: $BACKUP_DIR/novalon-backup-$TIMESTAMP"
else
    echo "⚠️  首次部署，无需备份"
    mkdir -p "$DEPLOY_DIR"
fi

# 步骤 3: 部署新版本
echo ""
echo "[3/5] 部署新版本..."
# 清空目标目录（保留 .well-known）
if [ -d "$DEPLOY_DIR/.well-known" ]; then
    mv "$DEPLOY_DIR/.well-known" /tmp/well-known-backup
fi
rm -rf "$DEPLOY_DIR"/*
cp -r "$BUILD_DIR"/* "$DEPLOY_DIR/"
if [ -d /tmp/well-known-backup ]; then
    mv /tmp/well-known-backup "$DEPLOY_DIR/.well-known"
fi
echo "✅ 文件部署完成"

# 步骤 4: 设置权限
echo ""
echo "[4/5] 设置文件权限..."
chmod -R 755 "$DEPLOY_DIR"
echo "✅ 权限设置完成"

# 步骤 5: 重载 Nginx
echo ""
echo "[5/5] 重载 Nginx..."
if nginx -t 2>/dev/null; then
    nginx -s reload
    echo "✅ Nginx 重载成功"
else
    echo "⚠️  Nginx 配置检查失败，跳过重载（请手动检查）"
fi

echo ""
echo "========================================="
echo "  ✅ 部署完成！"
echo "  站点地址: https://www.novalon.cn"
echo "  部署目录: $DEPLOY_DIR"
echo "========================================="