#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import os
import json

from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
from google.oauth2.credentials import Credentials

from load import config
from .utils import Helper

# If modifying these scopes, delete the file token.json.
SCOPES = ['https://www.googleapis.com/auth/documents.readonly']

__all__ = ['docs_parse', 'get_about_replacements']


def docs_parse() -> None:
    creds = None
    # The file token.json stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first
    # time.
    if os.path.exists(config.token_file):
        creds = Credentials.from_authorized_user_file(
            config.token_file,
            SCOPES
        )
    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(
                config.credentials_file, SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open(config.token_file, 'w') as token:
            token.write(creds.to_json())

    service = build('docs', 'v1', credentials=creds)

    # Retrieve the documents contents from the Docs service.
    document = service.documents().get(documentId=config.documentid).execute()
    if os.path.exists(config.data_file):
        os.remove(config.data_file)

    with open(config.data_file, 'w') as f:
        json.dump(document, f, ensure_ascii=False)
        f.close()


def read_parse_data():
    with open(config.data_file, 'r') as f:
        data = json.loads(f.read())
        f.close()
        return data


def get_about_replacements() -> dict:
    helper = Helper()
    document = read_parse_data()
    info = []
    element = helper.get_table_element()

    try:
        count = document['body']["content"][element]["table"]["rows"]
    except (IndexError, KeyError):
        image, image_bytes = helper.find_image(document)
        if not image:
            element = helper.find_with_table(document)
            if element:
                count = document['body']["content"][element]["table"]["rows"]
            else:
                info = helper.find_with_text(document)

    date = helper.get_date(document)

    another_teacher = helper.teacher(document)

    if element:
        for c in range(0, count):
            more_replaces = (document['body']
                ["content"][element]["table"]
                ["tableRows"][c]["tableCells"][1]
                ["content"]
            )
            replaces = ''
            for i in range(0, len(more_replaces)):
                replaces += (document['body']["content"][element]["table"]
                        ["tableRows"][c]["tableCells"][1]
                        ["content"][i]["paragraph"]["elements"][0]
                        ["textRun"]["content"].rstrip("\n"))
            
            info.append(
                (
                    document['body']["content"][element]["table"]
                    ["tableRows"][c]["tableCells"][0]
                    ["content"][0]["paragraph"]["elements"][0]
                    ["textRun"]["content"].rstrip("\n"),
                    replaces
                )
            )

    if image:
        return {
            "image": image,
            'date': date if type(date) != type(False) else "Error" ,
            'data': {"all": image_bytes},
            'another_teacher': another_teacher,
        }
    return {
        'date': date if type(date) != type(False) else "Error" ,
        'data': dict(info),
        'another_teacher': another_teacher,
    }