from flask import Flask, jsonify, render_template,request
import json

import os
import sys
import filelock

def resource_path(relative_path):
    """ Get absolute path to resource, works for dev and for PyInstaller """
    base_path = getattr(sys, '_MEIPASS', os.path.dirname(os.path.abspath(__file__)))
    return os.path.join(base_path, relative_path)

app = Flask(__name__, static_folder=resource_path('web'), static_url_path='')

@app.route('/')
def index():
    return app.send_static_file('index.html')

@app.route('/api/config')
def get_config():
    with open('cfg.json', 'r', encoding='utf-8') as f:
        config = json.load(f)
    return jsonify(config)


@app.route('/saveForm', methods=['POST'])
def submit():
    username = request.json.get('name')
    password = request.json.get('email')

    # 执行提交逻辑
    print(username,password)

    return jsonify({"code": 0, "msg": "恭喜，注册成功！"})


@app.route('/api/getStatus')
def getStatus():
    #产生三组随机数，随机数在-1 0 1之间
    import random
    import time
    time.sleep(1)
    a = random.randint(-1, 1)
    b = random.randint(-1, 1)
    c = random.randint(-1, 1)
    return jsonify({"code": 0, "data": {'state':[a, b, c]}})


@app.route('/sendData',methods=['POST'])
def sendUPD():
    #print the keys and values of the request
    print(request.json)
    return jsonify({"code": 0, "msg": "发送指令成功！"})



# 定义锁文件的路径
LOCKFILE = 'app.lock'

def acquire_lock(lock_file):
    """
    获取文件锁

    Args:
        lock_file: 锁文件路径

    Returns:
        FileLock 对象 如果成功获取锁，None 否则
    """
    try:
        lock = filelock.FileLock(lock_file)
        lock.acquire(timeout=1)
        return lock
    except filelock.Timeout:
        return None

def release_lock(lock):
    if lock:
        lock.release()

def start_flask():
    app.run(debug=True, port=5000, use_reloader=False)

if __name__ == '__main__':
    # 以进程方式运行服务
    # import threading
    # flask_thread = threading.Thread(target=start_flask)
    # flask_thread.daemon = True
    # flask_thread.start()


    lock =  acquire_lock(LOCKFILE)
    if not lock:
        print("Another instance is already running. Exiting...")
        sys.exit(1)
    
    # 启动 Flask 服务器
    print("Starting Flask server...")
    start_flask()
    
    # 服务器启动后，下面的代码将不会被立即执行，直到服务器停止
    print("This line will not be executed until the server stops.")
    release_lock(lock)