# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.
import logging
import json
import re
import urllib2
import werkzeug.urls

from odoo import api, fields, models
from odoo.exceptions import RedirectWarning, UserError
from odoo.tools.safe_eval import safe_eval
from odoo.tools.translate import _

from odoo.addons.google_account.models.google_service import GOOGLE_TOKEN_ENDPOINT, TIMEOUT

_logger = logging.getLogger(__name__)


class GoogleDrive(models.Model):

    _name = 'google.drive.config'
    _description = "Google Drive templates config"

    @api.multi
    def get_google_drive_url(self, res_id, template_id):
        self.ensure_one()
        self = self.sudo()

        model = self.model_id
        filter_name = self.filter_id.name if self.filter_id else False
        record = self.env[model.model].browse(res_id).read()[0]
        record.update({
            'model': model.name,
            'filter': filter_name
        })
        name_gdocs = self.name_template
        try:
            name_gdocs = name_gdocs % record
        except:
            raise UserError(_("At least one key cannot be found in your Google Drive name pattern"))

        attachments = self.env["ir.attachment"].search([('res_model', '=', model.model), ('name', '=', name_gdocs), ('res_id', '=', res_id)])
        url = False
        if attachments:
            url = attachments[0].url
        else:
            url = self.copy_doc(res_id, template_id, name_gdocs, model.model).get('url')
        return url

    @api.model
    def get_access_token(self, scope=None):
        Config = self.env['ir.config_parameter']
        google_drive_refresh_token = Config.sudo().get_param('google_drive_refresh_token')
        user_is_admin = self.env['res.users'].browse(self.env.user.id)._is_admin()
        if not google_drive_refresh_token:
            if user_is_admin:
                dummy, action_id = self.env['ir.model.data'].get_object_reference('base_setup', 'action_general_configuration')
                msg = _("You haven't configured 'Authorization Code' generated from google, Please generate and configure it .")
                raise RedirectWarning(msg, action_id, _('Go to the configuration panel'))
            else:
                raise UserError(_("Google Drive is not yet configured. Please contact your administrator."))
        google_drive_client_id = Config.sudo().get_param('google_drive_client_id')
        google_drive_client_secret = Config.sudo().get_param('google_drive_client_secret')
        #For Getting New Access Token With help of old Refresh Token
        data = werkzeug.url_encode({
            'client_id': google_drive_client_id,
            'refresh_token': google_drive_refresh_token,
            'client_secret': google_drive_client_secret,
            'grant_type': "refresh_token",
            'scope': scope or 'https://www.googleapis.com/auth/drive'
        })
        headers = {"Content-type": "application/x-www-form-urlencoded"}
        try:
            req = urllib2.Request(GOOGLE_TOKEN_ENDPOINT, data, headers)
            content = urllib2.urlopen(req, timeout=TIMEOUT).read()
        except urllib2.HTTPError:
            if user_is_admin:
                dummy, action_id = self.env['ir.model.data'].get_object_reference('base_setup', 'action_general_configuration')
                msg = _("Something went wrong during the token generation. Please request again an authorization code .")
                raise RedirectWarning(msg, action_id, _('Go to the configuration panel'))
            else:
                raise UserError(_("Google Drive is not yet configured. Please contact your administrator."))
        content = json.loads(content)
        return content.get('access_token')

    @api.model
    def copy_doc(self, res_id, template_id, name_gdocs, res_model):
        google_web_base_url = self.env['ir.config_parameter'].sudo().get_param('web.base.url')
        access_token = self.get_access_token()
        # Copy template in to drive with help of new access token
        request_url = "https://www.googleapis.com/drive/v2/files/%s?fields=parents/id&access_token=%s" % (template_id, access_token)
        headers = {"Content-type": "application/x-www-form-urlencoded"}
        try:
            req = urllib2.Request(request_url, None, headers)
            parents = urllib2.urlopen(req, timeout=TIMEOUT).read()
        except urllib2.HTTPError:
            raise UserError(_("The Google Template cannot be found. Maybe it has been deleted."))
        parents_dict = json.loads(parents)

        record_url = "Click on link to open Record in Odoo\n %s/?db=%s#id=%s&model=%s" % (google_web_base_url, self._cr.dbname, res_id, res_model)
        data = {
            "title": name_gdocs,
            "description": record_url,
            "parents": parents_dict['parents']
        }
        request_url = "https://www.googleapis.com/drive/v2/files/%s/copy?access_token=%s" % (template_id, access_token)
        headers = {
            'Content-type': 'application/json',
            'Accept': 'text/plain'
        }
        data_json = json.dumps(data)
        # resp, content = Http().request(request_url, "POST", data_json, headers)
        req = urllib2.Request(request_url, data_json, headers)
        content = urllib2.urlopen(req, timeout=TIMEOUT).read()
        content = json.loads(content)
        res = {}
        if content.get('alternateLink'):
            res['id'] = self.env["ir.attachment"].create({
                'res_model': res_model,
                'name': name_gdocs,
                'res_id': res_id,
                'type': 'url',
                'url': content['alternateLink']
            }).id
            # Commit in order to attach the document to the current object instance, even if the permissions has not been written.
            self._cr.commit()
            res['url'] = content['alternateLink']
            key = self._get_key_from_url(res['url'])
            request_url = "https://www.googleapis.com/drive/v2/files/%s/permissions?emailMessage=This+is+a+drive+file+created+by+Odoo&sendNotificationEmails=false&access_token=%s" % (key, access_token)
            data = {'role': 'writer', 'type': 'anyone', 'value': '', 'withLink': True}
            try:
                req = urllib2.Request(request_url, json.dumps(data), headers)
                urllib2.urlopen(req, timeout=TIMEOUT)
            except urllib2.HTTPError:
                raise self.env['res.config.settings'].get_config_warning(_("The permission 'reader' for 'anyone with the link' has not been written on the document"))
            if self.env.user.email:
                data = {'role': 'writer', 'type': 'user', 'value': self.env.user.email}
                try:
                    req = urllib2.Request(request_url, json.dumps(data), headers)
                    urllib2.urlopen(req, timeout=TIMEOUT)
                except urllib2.HTTPError:
                    pass
        return res

    @api.model
    def get_google_drive_config(self, res_model, res_id):
        '''
        Function called by the js, when no google doc are yet associated with a record, with the aim to create one. It
        will first seek for a google.docs.config associated with the model `res_model` to find out what's the template
        of google doc to copy (this is usefull if you want to start with a non-empty document, a type or a name
        different than the default values). If no config is associated with the `res_model`, then a blank text document
        with a default name is created.
          :param res_model: the object for which the google doc is created
          :param ids: the list of ids of the objects for which the google doc is created. This list is supposed to have
            a length of 1 element only (batch processing is not supported in the code, though nothing really prevent it)
          :return: the config id and config name
        '''
        if not res_id:
            raise UserError(_("Creating google drive may only be done by one at a time."))
        # check if a model is configured with a template
        configs = self.search([('model_id', '=', res_model)])
        config_values = []
        for config in configs.sudo():
            if config.filter_id:
                if config.filter_id.user_id and config.filter_id.user_id.id != self.env.user.id:
                    #Private
                    continue
                domain = [('id', 'in', [res_id])] + safe_eval(config.filter_id.domain)
                additionnal_context = safe_eval(config.filter_id.context)
                google_doc_configs = self.env[config.filter_id.model_id].with_context(**additionnal_context).search(domain)
                if google_doc_configs:
                    config_values.append({'id': config.id, 'name': config.name})
            else:
                config_values.append({'id': config.id, 'name': config.name})
        return config_values

    name = fields.Char('Template Name', required=True)
    model_id = fields.Many2one('ir.model', 'Model', ondelete='set null', required=True)
    model = fields.Char('Related Model', related='model_id.model', readonly=True)
    filter_id = fields.Many2one('ir.filters', 'Filter', domain="[('model_id', '=', model)]")
    google_drive_template_url = fields.Char('Template URL', required=True)
    google_drive_resource_id = fields.Char('Resource Id', compute='_compute_ressource_id')
    google_drive_client_id = fields.Char('Google Client', compute='_compute_client_id')
    name_template = fields.Char('Google Drive Name Pattern', default='Document %(name)s', help='Choose how the new google drive will be named, on google side. Eg. gdoc_%(field_name)s', required=True)
    active = fields.Boolean('Active', default=True)

    def _get_key_from_url(self, url):
        word = re.search("(key=|/d/)([A-Za-z0-9-_]+)", url)
        if word:
            return word.group(2)
        return None

    @api.multi
    def _compute_ressource_id(self):
        result = {}
        for record in self:
            word = self._get_key_from_url(record.google_drive_template_url)
            if word:
                record.google_drive_resource_id = word
            else:
                raise UserError(_("Please enter a valid Google Document URL."))
        return result

    @api.multi
    def _compute_client_id(self):
        google_drive_client_id = self.env['ir.config_parameter'].sudo().get_param('google_drive_client_id')
        for record in self:
            record.google_drive_client_id = google_drive_client_id

    @api.onchange('model_id')
    def _onchange_model_id(self):
        if self.model_id:
            self.model = self.model_id.model
        else:
            self.filter_id = False
            self.model = False

    @api.constrains('model_id', 'filter_id')
    def _check_model_id(self):
        if self.filter_id and self.model_id.model != self.filter_id.model_id:
            return False
        return True

    def get_google_scope(self):
        return 'https://www.googleapis.com/auth/drive https://www.googleapis.com/auth/drive.file'