#!/bin/bash

# 3D 家具安装展示系统 - 本地部署脚本
# 适用于: Linux / NAS (群晖/威联通)
# 
# 使用方法:
#   chmod +x scripts/deploy.sh
#   ./scripts/deploy.sh

set -e

# 颜色输出
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# 打印带颜色的消息
print_info() {
    echo -e "${BLUE}[INFO]${NC} $1"
}

print_success() {
    echo -e "${GREEN}[SUCCESS]${NC} $1"
}

print_warning() {
    echo -e "${YELLOW}[WARNING]${NC} $1"
}

print_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

# 打印欢迎信息
print_welcome() {
    echo ""
    echo "=========================================="
    echo "  3D 家具安装展示系统"
    echo "  自动部署脚本 v1.0"
    echo "=========================================="
    echo ""
}

# 检查系统要求
check_requirements() {
    print_info "检查系统要求..."
    
    # 检查 Docker
    if ! command -v docker &> /dev/null; then
        print_error "Docker 未安装，请先安装 Docker"
        exit 1
    fi
    print_success "Docker 已安装: $(docker --version)"
    
    # 检查 Docker Compose
    if ! command -v docker-compose &> /dev/null; then
        print_error "Docker Compose 未安装，请先安装 Docker Compose"
        exit 1
    fi
    print_success "Docker Compose 已安装: $(docker-compose --version)"
    
    # 检查 Docker 是否运行
    if ! docker info &> /dev/null; then
        print_error "Docker 服务未运行，请启动 Docker"
        exit 1
    fi
    print_success "Docker 服务运行正常"
}

# 检测硬件配置
detect_hardware() {
    print_info "检测硬件配置..."
    
    # 检测内存 (GB)
    TOTAL_MEM=$(free -g | awk '/^Mem:/{print $2}')
    print_info "总内存: ${TOTAL_MEM}GB"
    
    # 检测 CPU 核心数
    CPU_CORES=$(nproc)
    print_info "CPU 核心数: ${CPU_CORES}"
    
    # 检测磁盘空间 (GB)
    DISK_AVAIL=$(df -BG / | awk 'NR==2 {print $4}' | sed 's/G//')
    print_info "可用磁盘空间: ${DISK_AVAIL}GB"
    
    # 推荐部署模式
    if [ "$TOTAL_MEM" -lt 4 ]; then
        print_error "内存不足 4GB，无法部署系统"
        exit 1
    elif [ "$TOTAL_MEM" -lt 8 ]; then
        DEPLOYMENT_MODE="lightweight"
        print_warning "内存为 ${TOTAL_MEM}GB，将使用轻量级模式"
    else
        DEPLOYMENT_MODE="standard"
        print_success "内存充足，将使用标准模式"
    fi
    
    if [ "$DISK_AVAIL" -lt 50 ]; then
        print_warning "磁盘可用空间不足 50GB，建议清理磁盘"
    fi
}

# 生成配置文件
generate_config() {
    print_info "生成配置文件..."
    
    # 检查 .env 文件是否存在
    if [ -f ".env" ]; then
        print_warning ".env 文件已存在"
        read -p "是否覆盖现有配置? (y/N): " -n 1 -r
        echo
        if [[ ! $REPLY =~ ^[Yy]$ ]]; then
            print_info "保留现有配置"
            return
        fi
    fi
    
    # 复制模板
    cp .env.example .env
    
    # 生成随机密码
    ADMIN_PASSWORD=$(openssl rand -base64 16 | tr -d "=+/" | cut -c1-16)
    DB_PASSWORD=$(openssl rand -base64 32 | tr -d "=+/" | cut -c1-32)
    MINIO_PASSWORD=$(openssl rand -base64 32 | tr -d "=+/" | cut -c1-32)
    
    # 更新 .env 文件
    sed -i "s/DEPLOYMENT_MODE=.*/DEPLOYMENT_MODE=${DEPLOYMENT_MODE}/" .env
    sed -i "s/ADMIN_PASSWORD=.*/ADMIN_PASSWORD=${ADMIN_PASSWORD}/" .env
    sed -i "s/DB_PASSWORD=.*/DB_PASSWORD=${DB_PASSWORD}/" .env
    sed -i "s/MINIO_PASSWORD=.*/MINIO_PASSWORD=${MINIO_PASSWORD}/" .env
    
    print_success "配置文件已生成"
    print_info "管理员密码: ${ADMIN_PASSWORD}"
    print_warning "请妥善保存以上密码！"
}

# 启动服务
start_services() {
    print_info "启动 Docker 服务..."
    
    COMPOSE_FILE="docker-compose.${DEPLOYMENT_MODE}.yml"
    
    if [ ! -f "$COMPOSE_FILE" ]; then
        print_error "配置文件 ${COMPOSE_FILE} 不存在"
        exit 1
    fi
    
    # 拉取镜像
    print_info "拉取 Docker 镜像..."
    docker-compose -f "$COMPOSE_FILE" pull
    
    # 启动服务
    print_info "启动服务..."
    docker-compose -f "$COMPOSE_FILE" up -d
    
    print_success "服务已启动"
}

# 等待服务就绪
wait_for_services() {
    print_info "等待服务就绪..."
    
    MAX_WAIT=120
    ELAPSED=0
    
    while [ $ELAPSED -lt $MAX_WAIT ]; do
        if docker-compose ps | grep -q "healthy"; then
            print_success "服务已就绪"
            return 0
        fi
        sleep 5
        ELAPSED=$((ELAPSED + 5))
        echo -n "."
    done
    
    echo ""
    print_warning "服务启动超时，请检查日志"
}

# 显示访问信息
show_access_info() {
    echo ""
    echo "=========================================="
    echo "  部署完成！"
    echo "=========================================="
    echo ""
    print_success "访问地址: http://localhost:3000"
    print_success "管理员账号: admin"
    print_info "管理员密码: 请查看上方输出"
    echo ""
    print_info "查看日志: docker-compose -f docker-compose.${DEPLOYMENT_MODE}.yml logs -f"
    print_info "停止服务: docker-compose -f docker-compose.${DEPLOYMENT_MODE}.yml down"
    echo ""
}

# 主函数
main() {
    print_welcome
    check_requirements
    detect_hardware
    generate_config
    start_services
    wait_for_services
    show_access_info
}

# 运行主函数
main