#!/bin/bash

# 配置参数
GUNICORN_CMD="python3 /home/work/anaconda3/bin/gunicorn"
APP_NAME="flask_wht_server_api:app"
PORT="8216"
WORKERS="6"
LOG_FILE="log10bjh_wht_server_api_$(date +%y%m%d%H%M).log"
PID_FILE="/tmp/gunicorn_wht_server_api.pid"  # 与Gunicorn启动参数一致
TIMEOUT=30

# (1) 停止现有进程
stop_previous_process() {
    # 检查Gunicorn的PID文件
    if [ -f "$PID_FILE" ]; then
        read -r PID < "$PID_FILE"
        echo "Found Gunicorn PID file with PID: $PID"
        if [ -n "$PID" ] && ps -p "$PID" > /dev/null; then
            echo "Stopping Gunicorn master process (PID: $PID)..."
            kill "$PID"
            sleep 2
            if ps -p "$PID" > /dev/null; then
                echo "Force killing Gunicorn master..."
                kill -9 "$PID"
            fi
        fi
        rm -f "$PID_FILE"
    fi

    # 杀死所有残留的Worker进程
    WORKER_PIDS=$(pgrep -f "flask_wht_server_api:app")
    if [ -n "$WORKER_PIDS" ]; then
        echo "Killing leftover worker processes: $WORKER_PIDS"
        kill -9 $WORKER_PIDS
    fi
}

# (2) 启动新进程
start_new_process() {
    echo "Starting new Gunicorn server..."
    CMD="$GUNICORN_CMD -w $WORKERS -b 0.0.0.0:$PORT --pid $PID_FILE $APP_NAME"
    #nohup $CMD >> "$LOG_FILE" 2>&1 &
    nohup $CMD > /dev/null 2>&1 &
    echo "Done. Server output is being written to $LOG_FILE"
}

# 执行
stop_previous_process
sleep 2s
start_new_process