# -*- coding: utf-8 -*-
# !/usr/bin/env python

from pymongo import InsertOne, UpdateOne, DeleteOne
from pymongo.errors import BulkWriteError
from typing import Dict


class BulkHandler(object):
    def __init__(self, collection):
        self.collection = collection
        self.bulk = collection.initialize_unordered_bulk_op()

    def insert(self, insert_dict):
        self.bulk.insert(insert_dict)

    def update(self, query_dict, update_dict):
        self.bulk.find(query_dict).update(update_dict)

    def upsert(self, query_dict, update_dict):
        self.bulk.find(query_dict).upsert().update(update_dict)

    def delete(self, query_dict):
        self.bulk.find(query_dict).remove()

    def execute(self):
        result = {'success': 0, 'info': 0}
        try:
            if len(self.bulk._BulkOperationBuilder__bulk.ops) != 0:
                result['info'] = self.bulk.execute()
                result['success'] = 1
            else:
                result['info'] = 'no operation to execute'
                result['success'] = 1
        except Exception as e:
            result['info'] = e
            result['success'] = 0

        return result


class BulkHandlerEx(object):
    def __init__(self, collection):
        self.collection = collection
        self.requests = []

    def insert(self, insert_dict):
        self.requests.append(InsertOne(insert_dict))

    def update(self, query_dict, update_dict):
        self.requests.append(UpdateOne(query_dict, update_dict, upsert = False))

    def upsert(self, query_dict, update_dict):
        self.requests.append(UpdateOne(query_dict, update_dict, upsert = True))

    def delete(self, query_dict):
        self.requests.append(DeleteOne(query_dict))

    def execute(self, ordered = False):
        result = {'success': 0, 'info': 0}
        try:
            if len(self.requests) != 0:
                reuslt = self.collection.bulk_write(self.requests, ordered = ordered)
                result['info'] = reuslt.bulk_api_result
                result['success'] = 1
            else:
                result['info'] = {'writeErrors': list(), 'desc': 'no operation to execute'}
                result['success'] = 2
        except BulkWriteError as e:
            result['info'] = e.details
            result['success'] = 1
        except Exception as e:
            result['info'] = e
            result['success'] = 0

        return result


def format_dot_key(rule_dict, to_dot = False):
    # type: (Dict, bool)->Dict
    rv = {}

    for k, v in rule_dict.items():
        if to_dot:
            rv[k.replace('-', '.')] = v
        else:
            rv[k.replace('.', '-')] = v

    return rv


def dict_field_with_money(mydict):
    for key, value in mydict.iteritems():
        if hasattr(value, 'mongo_amount'):
            mydict[key] = value.mongo_amount
        else:
            mydict[key] = value

    return mydict