import os
import re
import json
import requests
from flask import Flask, request
from simpleeval import simple_eval

app = Flask(__name__)

GROUP_ID = os.environ.get("GROUP_ID")
LINE_CHANNEL_ACCESS_TOKEN = os.environ.get("LINE_CHANNEL_ACCESS_TOKEN")

message_list = {}


@app.route('/', methods=['GET'])
def index():
    return {}, 200


@app.route("/api/", methods=["POST"])
def api():
    try:
        payload = get_payload_dict(request.get_json())

        if payload.get("group_id") != GROUP_ID:
            raise ValueError("Invalid Group")

        if payload.get("unsend_msg_id"):
            message_list.pop(payload.get("unsend_msg_id"), None)
            raise ValueError("Unsend Success")

        if "$" not in payload.get("msg_text"):
            raise ValueError("Keyword not Found")

        if get_amount(payload.get("msg_text")) == None:
            raise ValueError("Amount is None")

        if payload.get("quoted_msg_id"):
            message_list[payload.get("msg_id")] = {"user_id": payload.get("user_id"),
                                                   "amount": get_amount(payload.get("msg_text")),
                                                   "quoted_msg_id": payload.get("quoted_msg_id")}
        else:
            message_list[payload.get("msg_id")] = {"user_id": payload.get("user_id"),
                                                   "amount": get_amount(payload.get("msg_text"))}

        # username = get_username(payload)
        # text = payload.get("msg_text")
        # print(username)
        # send_text(payload.get("token"), f"{username}:{text}")
    except Exception as e:
        print(f"An error occurred: {e}")

    print(message_list)
    print()
    return "", 200


def get_payload_dict(raw_payload) -> dict:
    # print(raw_payload)
    events = raw_payload.get("events", [{}])[0]
    return {"token": events.get("replyToken"),
            "group_id": events.get("source", {}).get("groupId"),
            "user_id": events.get("source", {}).get("userId"),
            "msg_type": events.get("message", {}).get("type"),
            "msg_id": events.get("message", {}).get("id"),
            "msg_text": events.get("message", {}).get("text"),
            "quoted_msg_id": events.get("message", {}).get("quotedMessageId"),
            "unsend_msg_id": events.get("unsend", {}).get("messageId")}


def send_text(token: str, text: str):
    requests.post("https://api.line.me/v2/bot/message/reply", headers={
        "Content-Type": "application/json; charset=UTF-8",
        "Authorization": "Bearer " + LINE_CHANNEL_ACCESS_TOKEN
    }, json={
        "replyToken": token,
        "messages": [{"type": "text", "text": text}]
    })


def get_username(user_id: str):
    url = f"https://api.line.me/v2/bot/group/{GROUP_ID}/member/{user_id}"
    try:
        res_json = requests.get(url, headers={"Authorization": "Bearer " + LINE_CHANNEL_ACCESS_TOKEN}).json()
        return res_json.get("displayName")
    except:
        return "Unknow"


def get_username() -> list:
    url = f"https://api.line.me/v2/bot/group/{GROUP_ID}/members/ids"
    try:
        res_json = requests.get(url, headers={"Authorization": "Bearer " + LINE_CHANNEL_ACCESS_TOKEN}).json()
        return res_json.get("memberIds")
    except:
        return []


def get_amount(text: str) -> float | None:
    try:
        return round(float(simple_eval(text.split("$")[1])), 2)
    except:
        return None


if __name__ == "__main__":
    app.run(host="0.0.0.0", port=7860)