#!/bin/bash
# start_api_background.sh - 后台启动迁移后的 backend API 服务

set -e

VENV_DIR=".venv"
BACKEND_PATH="$PWD/backend"

mkdir -p logs

PID_FILE=logs/api.pid
LOG_FILE=logs/api.log

echo "========================================"
echo "后台启动 AI+合规智能中枢 API 服务"
echo "========================================"
echo ""

if [ ! -d "$VENV_DIR" ]; then
    echo "错误: 虚拟环境不存在，请先运行 ./quick_start.sh"
    exit 1
fi

if [ -f "$PID_FILE" ]; then
    PID=$(cat "$PID_FILE")
    if ps -p "$PID" > /dev/null 2>&1; then
        echo "服务已在运行 (PID: $PID)"
        echo "如需重启，请先运行: ./stop_api.sh"
        exit 1
    else
        rm -f "$PID_FILE"
    fi
fi

HOST=${API_HOST:-0.0.0.0}
PORT=${API_PORT:-8000}

echo "服务地址: http://$HOST:$PORT"
echo "日志文件: $LOG_FILE"
echo ""
echo "正在后台启动..."

PYTHONPATH="$BACKEND_PATH${PYTHONPATH:+:$PYTHONPATH}" \
nohup "$VENV_DIR/bin/python" -m uvicorn app.main:app --host "$HOST" --port "$PORT" > "$LOG_FILE" 2>&1 &
PID=$!

echo "$PID" > "$PID_FILE"

sleep 3

if ps -p "$PID" > /dev/null 2>&1; then
    echo "服务启动成功 (PID: $PID)"
    echo ""
    echo "API地址:      http://$HOST:$PORT"
    echo "API文档:      http://$HOST:$PORT/docs"
    echo "健康检查:     http://$HOST:$PORT/health"
    echo ""
    echo "查看日志:"
    echo "  tail -f $LOG_FILE"
    echo ""
    echo "停止服务:"
    echo "  ./stop_api.sh"
else
    echo "服务启动失败，请查看日志: $LOG_FILE"
    rm -f "$PID_FILE"
    exit 1
fi