import uvicorn
import fastapi
from linebot import LineBotApi, WebhookHandler
from linebot.models import ( 
    MessageEvent, TextMessage, TextSendMessage, FollowEvent, 
    )
import configparser

app = fastapi.FastAPI()

# bot config
config = configparser.ConfigParser()
config.read('config.ini')

line_bot_api = LineBotApi(config.get('line-bot', 'channel_access_token'))
handler = WebhookHandler(config.get('line-bot', 'channel_secret'))

# callback event
@app.post("/callback")
async def callback(request: fastapi.Request):
    signature = request.headers['X-Line-Signature']
    body = await request.body()
    handler.handle(body.decode('utf-8'), signature)
    return 'OK'

# follow event
@handler.add(FollowEvent)
def handle_follow(event):
    print(event.source.user_id)
    line_bot_api.reply_message(
        event.reply_token,
        TextSendMessage(text='歡迎加入好友'))                                

# # test answer, echo handler
# @handler.add(MessageEvent, message=TextMessage)
# def echo(event):
#     if '誰' in event.message.text:
#         line_bot_api.reply_message(
#             event.reply_token,
#             TextSendMessage(text='我是您的專屬祕書'))

#     else:
#         line_bot_api.reply_message(
#             event.reply_token,
#             TextSendMessage(text=event.message.text)
#         )

if __name__ == '__main__':
    uvicorn.run("main:app", host="127.0.0.1", port=5000, reload=True)