import os
import requests
from flask import Flask, request, abort
from linebot import LineBotApi, WebhookHandler
from linebot.exceptions import InvalidSignatureError
from linebot.models import MessageEvent, TextMessage, TextSendMessage


app = Flask(__name__)

ACCESS_TOKEN = str(os.environ.get('ACCESS_TOKEN'))
SECRET = str(os.environ.get('SECRET'))

line_bot_api = LineBotApi(ACCESS_TOKEN)
handler = WebhookHandler(SECRET)

@app.route("/callback", methods=['POST'])
def callback():
    # get X-Line-Signature header value
    signature = request.headers['X-Line-Signature']

    # get request body as text
    body = request.get_data(as_text=True)
    app.logger.info("Request body: " + body)

    # handle webhook body
    try:
        handler.handle(body, signature)
    except InvalidSignatureError:
        abort(400)

    return 'OK'


@handler.add(MessageEvent, message=TextMessage)
def handle_message(event):
    res = event.message.text
    if res == '1':
        line_bot_api.reply_message(
            event.reply_token,
            TextSendMessage(text='123'))


if __name__ == "__main__":
    app.run()
