#!/bin/bash
usage() {
    echo "Usage: $0 start|stop"
    exit 1
}

start_server() {
    if [ -f "$PID_FILE" ]; then
        echo "Already running!"
        exit 1
    fi
    cd "$WEBROOT_DIR"
    if command -v python3 > /dev/null; then
        nohup python3 -m http.server --bind "$BIND_ADDR" --cgi "$BIND_PORT" > "$OUT_FILE" 2>&1 &
    elif command -v python2 > /dev/null; then
        nohup python2 -m CGIHTTPServer "$BIND_PORT" > "$OUT_FILE" 2>&1 &
    else
        echo "Require python2 or python3!"
        exit 1
    fi
    echo "$!" > "$PID_FILE"
    echo "Started."
    exit
}

stop_server() {
    if [ ! -f ./server.pid ]; then
        echo "Not running."
        exit
    fi
    local PID="$(cat "$PID_FILE")"
    if ! kill -0 "$PID" 2> /dev/null; then
        echo "Not running."
        rm -f "$PID_FILE"
        exit
    fi
    kill "$PID"
    echo "Stopped."
    rm -f "$PID_FILE"
    exit
}

cd "$(dirname "$0")"
BASE_DIR="$(pwd)"
BIND_ADDR=0.0.0.0
BIND_PORT=8000
WEBROOT_DIR="${BASE_DIR}/webroot"
PID_FILE="${BASE_DIR}/server.pid"
OUT_FILE="${BASE_DIR}/server.out"
export LOG_DIR="/usr/local/myapp/logs"
case "$1" in
    start) start_server ;;
    stop) stop_server ;;
    *) usage ;;
esac