# -*- coding: utf-8 -*-
# Copyright 2015-2017 Compassion CH (http://www.compassion.ch)
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
from odoo import models, fields, api, exceptions, _
from odoo.tools.config import config

import json
import re
import logging


_logger = logging.getLogger(__name__)


try:
    import sendgrid
except ImportError:
    _logger.error("ImportError raised while loading module.")
    _logger.debug("ImportError details:", exc_info=True)


class SendgridTemplate(models.Model):
    """ Reference to a template available on the SendGrid user account. """
    _name = 'sendgrid.template'

    ##########################################################################
    #                                 FIELDS                                 #
    ##########################################################################
    name = fields.Char()
    remote_id = fields.Char(readonly=True)
    html_content = fields.Html(readonly=True)
    plain_content = fields.Text(readonly=True)
    detected_keywords = fields.Char(compute='_compute_keywords')

    def _compute_keywords(self):
        for template in self:
            if template.html_content:
                keywords = template.get_keywords()
                self.detected_keywords = ';'.join(keywords)

    @api.model
    def update_templates(self):
        api_key = config.get('sendgrid_api_key')
        if not api_key:
            raise exceptions.UserError(
                _('Missing sendgrid_api_key in conf file'))

        sg = sendgrid.SendGridAPIClient(apikey=api_key)
        template_client = sg.client.templates
        msg = template_client.get().body
        result = json.loads(msg)

        for template in result.get("templates", list()):
            id = template["id"]
            msg = template_client._(id).get().body
            template_versions = json.loads(msg)['versions']
            for version in template_versions:
                if version['active']:
                    template_vals = version
                    break
            else:
                continue

            vals = {
                "remote_id": id,
                "name": template["name"],
                "html_content": template_vals["html_content"],
                "plain_content": template_vals["plain_content"],
            }
            record = self.search([('remote_id', '=', id)])
            if record:
                record.write(vals)
            else:
                self.create(vals)
        return True

    def get_keywords(self):
        """ Search in the Sendgrid template for keywords included with the
        following syntax: {keyword_name} and returns the list of keywords.
        keyword_name shouldn't be longer than 50 characters and not contain
        whitespaces.
        You can replace the substitution prefix and suffix by adding values
        in the system parameters
            - mail_sendgrid.substitution_prefix
            - mail_sendgrid.substitution_suffix
        """
        self.ensure_one()
        params = self.env['ir.config_parameter']
        prefix = params.search([
            ('key', '=', 'mail_sendgrid.substitution_prefix')
        ]).value or '{'
        suffix = params.search([
            ('key', '=', 'mail_sendgrid.substitution_suffix')
        ]) or '}'
        pattern = prefix + r'\S{1,50}' + suffix
        return list(set(re.findall(pattern, self.html_content)))