# Copyright 2018 Ivan Yelizariev <https://it-projects.info/team/yelizariev>
# License MIT (https://opensource.org/licenses/MIT).
import logging

from odoo import _, api, fields, models, tools
from odoo.exceptions import UserError
from odoo.tools import pycompat

from odoo.addons.mail.models.mail_template import format_amount, format_date, format_tz

_logger = logging.getLogger(__name__)
FIELDS = ["body_html", "mail_server_id", "report_template"]

try:
    from odoo.addons.mail.models.mail_template import (
        mako_safe_template_env,
        mako_template_env,
    )
except ImportError:
    _logger.warning("jinja2 not available, templating features will not work!")


class MailTemplate(models.Model):

    _inherit = ["mail.template", "website_dependent.mixin"]
    _name = "mail.template"

    body_html = fields.Html(company_dependent=True, website_dependent=True)
    mail_server_id = fields.Many2one(
        string="Outgoing Mail Server (Multi-Website)",
        company_dependent=True,
        website_dependent=True,
    )
    report_template = fields.Many2one(
        string="Optional report to print and attach (Multi-Website)",
        company_dependent=True,
        website_dependent=True,
    )

    @api.multi
    def generate_email(self, res_ids, fields=None):
        """Remove mail_server_id when not set to recompute in _default_mail_server_id in mail.message"""
        multi_mode = True
        if isinstance(res_ids, pycompat.integer_types):
            multi_mode = False
        res = super(MailTemplate, self).generate_email(res_ids, fields=fields)
        if not multi_mode:
            list_of_dict = {0: res}
        else:
            list_of_dict = res

        for _unused, data in list_of_dict.items():
            if "mail_server_id" in data and not data.get("mail_server_id"):
                del data["mail_server_id"]

        return res

    @api.model
    def _render_template(self, template_txt, model, res_ids, post_process=False):
        """Override to add website to context"""
        multi_mode = True
        if isinstance(res_ids, pycompat.integer_types):
            multi_mode = False
            res_ids = [res_ids]

        results = dict.fromkeys(res_ids, u"")

        # try to load the template
        try:
            mako_env = (
                mako_safe_template_env
                if self.env.context.get("safe")
                else mako_template_env
            )
            template = mako_env.from_string(tools.ustr(template_txt))
        except Exception:
            _logger.info("Failed to load template %r", template_txt, exc_info=True)
            return multi_mode and results or results[res_ids[0]]

        # prepare template variables
        records = self.env[model].browse(
            it for it in res_ids if it
        )  # filter to avoid browsing [None]
        res_to_rec = dict.fromkeys(res_ids, None)
        for record in records:
            res_to_rec[record.id] = record

        variables = {
            "format_date": lambda date, format=False, context=self._context: format_date(
                self.env, date, format
            ),
            "format_tz": lambda dt, tz=False, format=False, context=self._context: format_tz(
                self.env, dt, tz, format
            ),
            "format_amount": lambda amount, currency, context=self._context: format_amount(
                self.env, amount, currency
            ),
            "user": self.env.user,
            "ctx": self._context,  # context kw would clash with mako internals
        }

        # [NEW] Check website and company context
        company = self.env["res.company"]  # empty value

        company_id = self.env.context.get("force_company")
        if company_id:
            company = self.env["res.company"].sudo().browse(company_id)

        if self.env.context.get("website_id"):
            website = self.env["website"].browse(self.env.context.get("website_id"))
        else:
            website = self.env.user.backend_website_id

        for res_id, record in res_to_rec.items():
            record_company = company
            if not record_company:
                if hasattr(record, "company_id") and record.company_id:
                    record_company = record.company_id

            record_website = website
            if hasattr(record, "website_id") and record.website_id:
                record_website = record.website_id

            if (
                record_company
                and record_website
                and record_website.company_id != company
            ):
                # company and website are incompatible, so keep only company
                record_website = self.env["website"]  # empty value

            record_context = dict(
                force_company=record_company.id, website_id=record_website.id
            )
            variables["object"] = record.with_context(**record_context)
            variables["website"] = record_website

            try:
                render_result = template.render(variables)
            except Exception:
                _logger.info(
                    "Failed to render template %r using values %r"
                    % (template, variables),
                    exc_info=True,
                )
                raise UserError(
                    _("Failed to render template %r using values %r")
                    % (template, variables)
                )
            if render_result == u"False":
                render_result = u""

            if post_process:
                render_result = self.with_context(**record_context).render_post_process(
                    render_result
                )

            results[res_id] = render_result

        return multi_mode and results or results[res_ids[0]]

    @api.model
    def create(self, vals):
        res = super(MailTemplate, self).create(vals)
        # make value company independent
        for f in FIELDS:
            res._force_default(f, vals.get(f))
        return res

    @api.multi
    def write(self, vals):
        res = super(MailTemplate, self).write(vals)

        # TODO: will it work with OCA's partner_firstname module?
        if "name" in vals:
            fields_to_update = FIELDS
        else:
            fields_to_update = [f for f in FIELDS if f in vals]
        for f in fields_to_update:
            self._update_properties_label(f)

        return res

    def _auto_init(self):
        for f in FIELDS:
            self._auto_init_website_dependent(f)
        return super(MailTemplate, self)._auto_init()