from flask import current_app
from bson.objectid import ObjectId

from .db import MongoDB


class UObject(object):
    def __init__(self, app=None):
        self.app = app

    def all(self):
        db = MongoDB(self.app)
        mongo = db.connection()
        return list(mongo.db.uobjects.find({}))

    def register(self, datas):
        db = MongoDB(self.app)
        mongo = db.connection()
        error = {}

        if type(datas) != dict:
            error = {
                "msg": "UObject datas type is not dict (JSON).",
                "code": 400
            }

        if not error:
            _id = mongo.db.uobjects.insert({"datas": datas})
            return {"_id": str(_id), "msg": "UObject added.", "code": 201}
        return error

    def remove(self, _id):
        db = MongoDB(self.app)
        mongo = db.connection()
        error = {}

        if not _id:
            error = {"msg": "UObject _id is required", "code": 400}
        elif len(list(mongo.db.uobjects.find({"_id": ObjectId(_id)}))) == 0:
            error = {
                "msg": "UObject {} not exist. So it's good.".format(_id),
                "code": 404
            }

        if not error:
            mongo.db.uobjects.remove({"_id": ObjectId(_id)})
            return {"msg": "UObject {} deleted".format(_id), "code": 200}
        return error

    def update(self, _id, datas):
        db = MongoDB(self.app)
        mongo = db.connection()
        error = {}

        if not _id:
            error = {"msg": "UObject _id is required", "code": 400}
        elif len(list(mongo.db.uobjects.find({"_id": ObjectId(_id)}))) == 0:
            error = {
                "msg": "UObject {} does not exist.".format(_id),
                "code": 404
            }

        datas = dict(
            ("datas.{}".format(key), value) for (key, value) in datas.items()
        )
        if not error:
            mongo.db.uobjects.update_one(
                {"_id": ObjectId(_id)}, {"$set": datas}
            )
            return {"msg": "UObject updated.", "code": 200}
        return error

    def eq(self, key, value):
        db = MongoDB(self.app)
        mongo = db.connection()

        datas = list(mongo.db.uobjects.find(
            {"datas.{}".format(key): {"$eq": value}}
        ))
        if datas:
            return {
                "msg": "UObjects found",
                "datas": datas,
                "code": 200
            }
        else:
            return {
                "msg": "UObjects not found",
                "datas": datas,
                "code": 404
            }

    def reset(self):
        db = MongoDB(self.app)
        mongo = db.connection()
        mongo.db.uobjects.remove()
        return "done"