import json


class Profile:
    def __init__(self, storage):
        self.storage = storage

    def create(self, member_id, msg=None):
        s = {"id": member_id, "parents": [], "children": [], "chats": []}

        if msg:
            if "from" in msg:
                sender = msg.get("from")
                s["mention"] = sender.get("username")
                s[
                    "name"
                ] = f"{sender['first_name']} {sender.get('last_name', '')}".strip()

            if "chat" in msg:
                chat_id = str(msg["chat"]["id"])
                if chat_id not in s["chats"]:
                    s["chats"].append(chat_id)

        self.storage.set(f"usr-{member_id}", json.dumps(s))
        return s

    def save(self, s):
        self.storage.set(f'usr-{s["id"]}', json.dumps(s))

    def get(self, member_id, msg=None):
        data = self.storage.get(f"usr-{member_id}")
        if data is None:
            r = self.create(member_id, msg)
        else:
            r = json.loads(data)
        return r

    def erase(self, member_id):
        data = self.storage.get(f"usr-{member_id}")
        if data:
            member = json.loads(data)
            for child in member["children"]:
                child_member = self.storage.get(f"usr-{child}")
                if child_member:
                    child_member = json.loads(child_member)
                    child_member["parents"].remove(member_id)
                    self.storage.set(f"usr-{child_member['id']}", json.dumps(child_member))