from grocy import RestService
from tabulate import tabulate
from os import path

class Stock(object):
    GET_CURRENT_STOCK = '/stock/get-current-stock'
    GET_PRODUCT_BY_ID = '/get-object/products/{0}'
    def __init__(self, **entries):
        self.__dict__.update(entries)
        self._init_rest_service()
        #self._set_default_table_formats()
        #if not hasattr('tablefmt', self):
        #    self.tablefmt = None
        #if not hasattr('colalign', self):
        #    self.colalign = None


    def _set_default_table_formats(self):
        if not hasattr('formats', self):
            self.tablefmt = None
            self.colalign = None
        elif not hasattr('table', self.formats):
                self.tableformat = None
        elif not hasattr('col', self.formats):
                self.colalign = None


    def _init_rest_service(self):
        if self.api.startswith == '/':
            self.api = self.api[1:]
        if self.api.endswith == '/':
            self.api = self.api[1:-1]
        self.rest_service = RestService(self.api, json=True)
        self.rest_service.addHeader('Content-Type', 'application/json')
        self.rest_service.addToken(self.token)


    def get_entries(self):
        try:
            get_current_stock = self.rest_service.get(Stock.GET_CURRENT_STOCK)

            # Get product names from ids and replace 
            product_ids = [entry['product_id'] for entry in get_current_stock]
            table_entries = []
            try:
                for index in range(0, len(product_ids)):
                    product_id = product_ids[index]
                    path = Stock.GET_PRODUCT_BY_ID.format(product_id)
                    product = self.rest_service.get(path)
                    get_current_stock[index]['product_id'] = product['name']
                    table_entry = list(dict.values(get_current_stock[index]))
                    table_entries.append(table_entry)

            except Exception as e:
                raise e

            # Generate stock overview table
            table_headers = ['Product', 'Amount', 'Best Before Date', 'Amount Opened']
            return tabulate(table_entries, headers=table_headers)
        except Exception as e:
            raise e