from app.app import mongo
from app.libs.redprint import Redprint
from flask import jsonify, request
from bson.objectid import ObjectId
from pymongo.errors import PyMongoError
import traceback

api = Redprint('chatMsg')


@api.route('/get/all')
def get_all_msg():
    # mongo.db.chatAll.delete_many({})
    msg_infos = list(mongo.db.chatAll.find())
    for msg_info in msg_infos:
        msg_info["_id"] = str(msg_info["_id"])
    return jsonify(msg_infos)


@api.route('/get/one2one/<sendId>/<rspId>')
def get_o2o_msg(sendId, rspId):
    # mongo.db.chatOne2One.delete_many({})
    msg_infos = list(mongo.db.chatOne2One.find())
    # 使用列表推导式过滤掉 resUserId 等于 chaterId 的元素
    msg_infos = [msg_info for msg_info in msg_infos if (sendId == msg_info["sendUserId"] and rspId == msg_info["resUserId"] or rspId == msg_info["sendUserId"] and sendId == msg_info["resUserId"])]

    for msg_info in msg_infos:
        msg_info["_id"] = str(msg_info["_id"])

    return jsonify(msg_infos)


@api.route('/get/more2more')
def get_m2m_msg():
    msg_infos = list(mongo.db.chatMore2More.find())
    for msg_info in msg_infos:
        msg_info["_id"] = str(msg_info["_id"])
    return jsonify(msg_infos)


def InitItem(item, id):
    user_id_obj = ObjectId(id)
    user = mongo.db.users.find_one({"_id": user_id_obj})
    if user:
        item["userId"] = id
        item["username"] = user["username"]
        item["avatar"] = user["avatar_url"]
        item["lastMsgContent"] = "您有一条新信息..."
        item["time"] = "2024-09-18 12:36:09"
        item["unreadCount"] = 1


@api.route('/get/chatItems/<user_id>')
def get_msg_list(user_id):
    user_id_obj = ObjectId(user_id)  # 尝试将user_id转化为ObjectId
    # mongo.db.chatList.delete_many({})
    try:
        # 从chatUsers数组中找到对应的用户聊天信息
        result = mongo.db.chatList.find_one(
            {"userId": user_id_obj},
        )
    except Exception as e:
        return jsonify({"message": f"Database error: {str(e)}"}), 500

    if result is None:
        # 文档未找到或用户未找到，返回 404 和提示信息
        return jsonify({"message": f"Chat items for user {user_id} do not exist."}), 404

    # 从结果中提取用户的聊天列表
    user_chat_info_ids = result.get('chatUsers', [])

    user_chat_list_info = []
    for user_chat_info_id in user_chat_info_ids:
        item = {}
        InitItem(item, user_chat_info_id)
        user_chat_list_info.append(item)

    # 返回数组
    return jsonify(user_chat_list_info), 200


@api.route('/appendChatUser', methods=['POST'])
def append_msg_list():
    data = request.get_json()

    user_id = data["userId"]
    to_append_id = data["id"]

    # 将字符串形式的user_id转换为ObjectId
    user_id_obj = ObjectId(user_id)

    try:
        # 使用update_one，如果文档存在则更新，不存在则插入
        result = mongo.db.chatList.update_one(
            {"userId": user_id_obj},
            {
                "$addToSet": {"chatUsers": to_append_id},
                "$setOnInsert": {"userId": user_id_obj}
            },
            upsert=True
        )
        
        if result.matched_count > 0:
            return jsonify({"message": "ID added successfully to existing user."}), 201
        else:
            return jsonify({"message": "New user created and ID added."}), 201
    
    except PyMongoError as e:
        return jsonify({"error": f"Database error: {str(e)}", "traceback": traceback.format_exc()}), 500

# id: obj.a2bId,
# name: obj.username,
# avatarList: obj.avatar,
# note: obj.lastMsgContent,
# time: obj.time,
# unreadCount: obj.unreadCount


# {
#     {
#       "userId": ObjectId("61d679a12e4d4e348a103c79"),
#       "chatUsers": [
#         ObjectId("61d679a12e4d4e348a103c7a"),
#         ObjectId("61d679a12e4d4e348a103c7b")
#       ]
#     },
#     {
#       "userId": ObjectId("61d679a12e4d4e348a103c7c"),
#       "chatUsers": [
#         ObjectId("61d679a12e4d4e348a103c7a"),
#         ObjectId("61d679a12e4d4e348a103c7d")
#       ]
#     }
# }