#!/usr/bin/env bash
# ============================================================
# LambdaAgentPaaS — Mac/Linux 一键启动脚本
#
# 用法:
#   ./deploy/start.sh           # 正常启动（首次会自动初始化）
#   ./deploy/start.sh --build   # 强制重新构建镜像
#   ./deploy/start.sh --reset   # 清除所有数据重新初始化（谨慎！）
#
# 要求: Docker Desktop 已安装并运行
# ============================================================
set -euo pipefail

# ── 路径常量 ─────────────────────────────────────────────────
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
DATA_DIR="${HOME}/.agentpaas/data"
ENV_FILE="${HOME}/.agentpaas/.env"
APP_PORT="${AGENTPAAS_PORT:-8000}"
APP_URL="http://localhost:${APP_PORT}"

# ── 颜色输出 ─────────────────────────────────────────────────
RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'
BLUE='\033[0;34m'; CYAN='\033[0;36m'; BOLD='\033[1m'; NC='\033[0m'
info()    { echo -e "${BLUE}ℹ ${NC}$*"; }
success() { echo -e "${GREEN}✅ $*${NC}"; }
warn()    { echo -e "${YELLOW}⚠️  $*${NC}"; }
error()   { echo -e "${RED}❌ $*${NC}" >&2; }
header()  { echo -e "\n${BOLD}${CYAN}$*${NC}\n"; }

# ── 参数解析 ─────────────────────────────────────────────────
BUILD_FLAG=""
RESET_FLAG=""
for arg in "$@"; do
  case $arg in
    --build) BUILD_FLAG="--build" ;;
    --reset) RESET_FLAG="yes" ;;
  esac
done

# ── 检查 Docker ──────────────────────────────────────────────
check_docker() {
  if ! command -v docker &>/dev/null; then
    error "未找到 Docker。请先安装 Docker Desktop:"
    echo "  https://docs.docker.com/desktop/install/mac-install/"
    echo ""
    if [[ "$OSTYPE" == "darwin"* ]]; then
      read -p "是否现在打开下载页面? (y/N) " yn
      [[ "$yn" =~ ^[Yy]$ ]] && open "https://docs.docker.com/desktop/install/mac-install/"
    fi
    exit 1
  fi

  if ! docker info &>/dev/null 2>&1; then
    info "Docker Desktop 未运行，正在启动..."
    if [[ "$OSTYPE" == "darwin"* ]]; then
      open -a "Docker Desktop" 2>/dev/null || open -a "Docker" 2>/dev/null || true
    fi
    echo -n "等待 Docker 就绪"
    local wait=0
    until docker info &>/dev/null 2>&1; do
      echo -n "."
      sleep 2
      ((wait+=2))
      if (( wait > 60 )); then
        echo ""
        error "Docker 启动超时（60s）。请手动启动 Docker Desktop 后重试。"
        exit 1
      fi
    done
    echo ""
    success "Docker 已就绪"
  fi
}

# ── 检查 docker compose ──────────────────────────────────────
check_compose() {
  if docker compose version &>/dev/null 2>&1; then
    COMPOSE_CMD="docker compose"
  elif command -v docker-compose &>/dev/null; then
    COMPOSE_CMD="docker-compose"
  else
    error "未找到 docker compose。请升级 Docker Desktop 到最新版本。"
    exit 1
  fi
}

# ── 初始化数据目录 ────────────────────────────────────────────
init_data_dir() {
  mkdir -p "${DATA_DIR}/instances"
  mkdir -p "${DATA_DIR}/knowledge_bases"
  mkdir -p "${DATA_DIR}/logs"
  # 限制 data 目录权限（避免被其他用户读取）
  chmod 700 "${HOME}/.agentpaas" 2>/dev/null || true
}

# ── 初始化 .env 配置文件 ─────────────────────────────────────
init_env() {
  if [[ -f "$ENV_FILE" && -z "$RESET_FLAG" ]]; then
    return 0  # 已存在且不是 reset 模式
  fi

  header "🔧 首次配置初始化"
  mkdir -p "$(dirname "$ENV_FILE")"

  # 复制模板
  cp "${PROJECT_DIR}/.env.template" "$ENV_FILE"

  # 自动生成 MASTER_KEY（安全随机 64 字节 hex）
  if command -v python3 &>/dev/null; then
    MASTER_KEY=$(python3 -c "import secrets; print(secrets.token_hex(32))")
  else
    MASTER_KEY=$(openssl rand -hex 32)
  fi

  # 写入 DATA_DIR 和 MASTER_KEY
  sed -i.bak "s|^AGENTPAAS_DATA_DIR=.*|AGENTPAAS_DATA_DIR=${DATA_DIR}|" "$ENV_FILE"
  sed -i.bak "s|^AGENTPAAS_MASTER_KEY=.*|AGENTPAAS_MASTER_KEY=${MASTER_KEY}|" "$ENV_FILE"
  rm -f "${ENV_FILE}.bak"

  success "配置文件已创建: $ENV_FILE"
  echo ""
  warn "请编辑 ${ENV_FILE} 填写至少一个 LLM API Key："
  echo "  DASHSCOPE_API_KEY=   (阿里云百炼，国内推荐)"
  echo "  ANTHROPIC_API_KEY=   (Claude)"
  echo "  OPENAI_API_KEY=      (GPT)"
  echo ""
  echo "编辑完成后重新运行此脚本。"
  echo ""
  read -p "是否现在打开配置文件编辑? (Y/n) " yn
  yn="${yn:-Y}"
  if [[ "$yn" =~ ^[Yy]$ ]]; then
    # 尝试用系统默认编辑器打开
    ${EDITOR:-$(command -v nano || command -v vi || echo "open")} "$ENV_FILE"
  fi
}

# ── 检查是否配置了至少一个 API Key ───────────────────────────
check_api_keys() {
  local has_key=false
  local key_vars=(DASHSCOPE_API_KEY OPENAI_API_KEY ANTHROPIC_API_KEY
                  DEEPSEEK_API_KEY ZHIPU_API_KEY MOONSHOT_API_KEY)
  for var in "${key_vars[@]}"; do
    val=$(grep "^${var}=" "$ENV_FILE" 2>/dev/null | cut -d= -f2 | tr -d ' \r\n')
    if [[ -n "$val" ]]; then
      has_key=true
      break
    fi
  done

  if [[ "$has_key" == "false" ]]; then
    warn "未检测到任何 LLM API Key。"
    warn "Agent 功能将不可用，直到在 ${ENV_FILE} 中配置至少一个 API Key。"
    echo ""
    read -p "继续启动? (y/N) " yn
    [[ "$yn" =~ ^[Yy]$ ]] || exit 0
  fi
}

# ── 启动服务 ─────────────────────────────────────────────────
start_services() {
  header "🚀 启动 LambdaAgentPaaS"
  cd "$PROJECT_DIR"

  # 将 DATA_DIR 导出供 docker-compose.yml 使用
  export AGENTPAAS_DATA_DIR="$DATA_DIR"

  # 加载 .env 中的其他变量
  set -a
  source "$ENV_FILE"
  set +a

  if [[ -n "$RESET_FLAG" ]]; then
    info "清除旧容器和镜像..."
    $COMPOSE_CMD down --remove-orphans 2>/dev/null || true
    docker rmi lambdagentpaas:latest 2>/dev/null || true
  fi

  info "构建并启动容器（首次构建约 3-5 分钟）..."
  $COMPOSE_CMD up -d ${BUILD_FLAG}
}

# ── 等待健康检查 ─────────────────────────────────────────────
wait_for_health() {
  echo -n "等待服务就绪"
  local wait=0
  until curl -sf "${APP_URL}/health" &>/dev/null; do
    echo -n "."
    sleep 2
    ((wait+=2))
    if (( wait > 120 )); then
      echo ""
      error "服务启动超时（120s）"
      echo ""
      echo "查看日志:"
      echo "  docker logs lambdagentpaas"
      exit 1
    fi
  done
  echo ""
}

# ── 打印成功信息 ─────────────────────────────────────────────
print_success() {
  echo ""
  echo -e "${GREEN}╔══════════════════════════════════════════════╗${NC}"
  echo -e "${GREEN}║  🎉 LambdaAgentPaaS 已成功启动！            ║${NC}"
  echo -e "${GREEN}╠══════════════════════════════════════════════╣${NC}"
  echo -e "${GREEN}║  Web 界面: ${BOLD}${APP_URL}${NC}${GREEN}              ║${NC}"
  echo -e "${GREEN}║  API 文档: ${APP_URL}/docs                   ║${NC}"
  echo -e "${GREEN}╠══════════════════════════════════════════════╣${NC}"
  echo -e "${GREEN}║  数据目录: ${DATA_DIR}${NC}"
  echo -e "${GREEN}║  配置文件: ${ENV_FILE}${NC}"
  echo -e "${GREEN}╠══════════════════════════════════════════════╣${NC}"
  echo -e "${GREEN}║  停止服务: ./deploy/stop.sh                  ║${NC}"
  echo -e "${GREEN}║  查看日志: docker logs -f lambdagentpaas     ║${NC}"
  echo -e "${GREEN}╚══════════════════════════════════════════════╝${NC}"
  echo ""
}

# ── 主流程 ───────────────────────────────────────────────────
main() {
  header "LambdaAgentPaaS 启动器"
  check_docker
  check_compose
  init_data_dir
  init_env
  check_api_keys
  start_services
  wait_for_health
  print_success

  # 自动打开浏览器
  if [[ "$OSTYPE" == "darwin"* ]]; then
    open "$APP_URL"
  elif command -v xdg-open &>/dev/null; then
    xdg-open "$APP_URL"
  fi
}

main "$@"