# -*- coding: utf-8 -*-"
# Copyright 2021 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Use information in rebase database to create rebase spreadsheet

Required python modules:
google-api-python-client google-auth-httplib2 google-auth-oauthlib

The Google Sheets API needs to be enabled to run this script.
Also, you'll need to generate access credentials and store those
in credentials.json.

Disable pyline noise
pylint: disable=no-absolute-import
"""

import os
import pickle

from googleapiclient import discovery # pylint: disable=import-error
from google_auth_oauthlib.flow import InstalledAppFlow # pylint: disable=import-error
from google.auth.transport.requests import Request # pylint: disable=import-error, disable=no-name-in-module

SCOPES = ['https://www.googleapis.com/auth/spreadsheets']

# Spreadsheet functions


def getsheet():
    """Get and return reference to spreadsheet"""

    creds = None
    # The file token.pickle 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('token.pickle'):
        with open('token.pickle', 'rb') as token:
            try:  # py2 or token saved with py3
                creds = pickle.load(token)
            except UnicodeDecodeError:  # py3, token saved with py2
                creds = pickle.load(token, encoding='latin-1') # pylint: disable=unexpected-keyword-arg
    # 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(
                'credentials.json', SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open('token.pickle', 'wb') as token:
            pickle.dump(creds, token)

    service = discovery.build('sheets', 'v4', credentials=creds)
    # service = discovery.build('sheets', 'v4', developerKey=API_KEY)
    return service.spreadsheets() # pylint: disable=no-member


def init_spreadsheet(filename, title):
    """Initialize spreadsheet"""

    sheet = getsheet()
    try:
        with open(filename, 'r') as f:
            ssid = f.read().strip('\n')
        request = sheet.get(
            spreadsheetId=ssid, ranges=[], includeGridData=False)
        response = request.execute()
        sheets = response.get('sheets')
        delete_sheets((sheet, ssid), sheets)
    except IOError:
        ssid = create_spreadsheet(sheet, title)
        with open(filename, 'w') as f:
            f.write(ssid)

    return (sheet, ssid)


# Generic topic functions


def get_other_topic_id(c):
    """Calculate and return other_topic_id"""

    other_topic_id = 0

    c.execute('select topic, name from topics order by name')
    for topic, name in c.fetchall():
        if name == 'other':
            return topic
        if topic >= other_topic_id:
            other_topic_id = topic + 1

    return other_topic_id


def get_topic_name(c, topic):
    """Get topic name from topic id"""

    c.execute("select name from topics where topic is '%s'" % topic)
    topic = c.fetchone()
    if topic:
        return topic[0]

    return None


# Spreadsheet manipulation functions


def doit(sheet, requests):
    """Execute a request"""

    body = {'requests': requests}

    request = sheet[0].batchUpdate(spreadsheetId=sheet[1], body=body)
    response = request.execute()
    return response


def hide_sheet(sheet, sheetId, hide):
    """Move 'Data' sheet to end of spreadsheet."""
    request = []

    request.append({
        'updateSheetProperties': {
            'properties': {
                'sheetId': sheetId,
                'hidden': hide,
            },
            'fields': 'hidden'
        }
    })

    doit(sheet, request)


def create_spreadsheet(sheet, title):
    """Create a spreadsheet and return reference to it"""
    spreadsheet = {'properties': {'title': title}}

    request = sheet.create(body=spreadsheet, fields='spreadsheetId')
    response = request.execute()

    return response.get('spreadsheetId')


def delete_sheets(sheet, sheets):
    """Delete all sheets except sheet 0. In sheet 0, delete all values."""
    # Unhide 'Data' sheet. If it is hidden we can't remove the other sheets.
    hide_sheet(sheet, 0, False)
    request = []
    for s in sheets:
        sheetId = s['properties']['sheetId']
        if sheetId != 0:
            request.append({'deleteSheet': {'sheetId': sheetId}})
        else:
            rows = s['properties']['gridProperties']['rowCount']
            request.append({
                'deleteRange': {
                    'range': {
                        'sheetId': sheetId,
                        'startRowIndex': 0,
                        'endRowIndex': rows,
                    },
                    'shiftDimension': 'ROWS',
                }
            })

    # We are letting this fail if there was nothing to clean. This will
    # hopefully result in re-creating the spreadsheet.
    doit(sheet, request)


def resize_sheet(requests, sheetId, start, end):
    """Resize a sheet in provided range"""

    requests.append({
        'autoResizeDimensions': {
            'dimensions': {
                'sheetId': sheetId,
                'dimension': 'COLUMNS',
                'startIndex': start,
                'endIndex': end
            }
        }
    })


def add_sheet_header(requests, sheetId, fields):
    """Add provided header line to specified sheet.

    Make it bold.

    Args:
        requests: Reference to list of requests to send to API.
        sheetId: Sheet Id
        fields: string with comma-separated list of fields
    """
    # Generate header row
    requests.append({
        'pasteData': {
            'data': fields,
            'type': 'PASTE_NORMAL',
            'delimiter': ',',
            'coordinate': {
                'sheetId': sheetId,
                'rowIndex': 0
            }
        }
    })

    # Convert header row to bold and centered
    requests.append({
        'repeatCell': {
            'range': {
                'sheetId': sheetId,
                'startRowIndex': 0,
                'endRowIndex': 1
            },
            'cell': {
                'userEnteredFormat': {
                    'horizontalAlignment': 'CENTER',
                    'textFormat': {
                        'bold': True
                    }
                }
            },
            'fields': 'userEnteredFormat(textFormat,horizontalAlignment)'
        }
    })


def move_sheet(sheet, sheetId, to):
    """Move 'Data' sheet to end of spreadsheet."""

    request = []

    request.append({
        'updateSheetProperties': {
            'properties': {
                'sheetId': sheetId,
                'index': to,
            },
            'fields': 'index'
        }
    })

    doit(sheet, request)


def source_range(sheetId, rows, column):
    """Return source range"""

    return {
        'sourceRange': {
            'sources': [{
                'sheetId': sheetId,
                'startRowIndex': 0,
                'endRowIndex': rows,
                'startColumnIndex': column,
                'endColumnIndex': column + 1
            }]
        }
    }


def scope(name, sheetId, rows, column):
    """Return single source range"""

    return {name: source_range(sheetId, rows, column)}


def sscope(name, sheetId, rows, start, end):
    """Return multiple source ranges"""

    s = [scope(name, sheetId, rows, start)]
    while start < end:
        start += 1
        s += [scope(name, sheetId, rows, start)]
    return s