import re
from datetime import datetime
from grocy import RestService
from tabulate import tabulate
from os import path

class Task(object):
    GET_CURRENT_TASKS = '/tasks/get-current'
    GET_CATEGORIES = '/get-objects/task_categories'
    GET_USERS = '/users/get'
    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_list(self):
        try:
            get_current_tasks = self.rest_service.get(Task.GET_CURRENT_TASKS)
            get_categories = self.rest_service.get(Task.GET_CATEGORIES)
            get_users = self.rest_service.get(Task.GET_USERS)
            users = {}
            categories = {}

            for category in get_categories:
                categories[category.get('id')] = category.get('name') 

            for user in get_users:
                users[user.get('id')] = user.get('username')

            table_headers = ['ID', 'Name', 'Due', 'Assigned To']
            table_entries = []
            for task in get_current_tasks:
                if task.get('category_id') == '':
                    category = ''
                else:
                    category = categories[categories.get('category_id')]

                if task.get('due_date') == '':
                    due_date = ''
                else:
                    due_date = datetime.strptime(task.get('due_date'), '%Y-%m-%d').date()

                if task.get('assigned_to_user_id') == '':
                    assigned_to = ''
                else:
                    assigned_to = users[task.get('assigned_to_user_id')]

                table_entry = [task.get('id'), task.get('name'), due_date, assigned_to]
                table_entries.append(table_entry)


        except Exception as e:
            raise e
            # Generate stock overview table
        return tabulate(table_entries, headers=table_headers)