import datetime

from openerp import api, exceptions, fields, models, tools
from openerp.tools.translate import _


class FetchMailServer(models.Model):
    _inherit = "fetchmail.server"
    _name = "fetchmail.server"

    _last_updated = None

    run_time = fields.Datetime(string="Launch time")

    def _run_time(self):
        if not self._last_updated:
            self._last_updated = tools.datetime.now()

        src_tstamp_str = self._last_updated.strftime(
            tools.misc.DEFAULT_SERVER_DATETIME_FORMAT
        )
        src_format = tools.misc.DEFAULT_SERVER_DATETIME_FORMAT
        dst_format = tools.misc.DEFAULT_SERVER_DATETIME_FORMAT
        dst_tz_name = self._context.get("tz") or self.env.user.tz
        _now = tools.misc.server_to_local_timestamp(
            src_tstamp_str, src_format, dst_format, dst_tz_name
        )

        return _now

    @api.model
    def _fetch_mails(self):

        if self._context.get("run_fetchmail_manually"):
            # if interval less than 5 seconds
            if self._last_updated and (
                datetime.datetime.now() - self._last_updated
            ) < datetime.timedelta(0, 5):
                raise exceptions.Warning(
                    _("Error"), _("Task can be started no earlier than 5 seconds.")
                )

        super(FetchMailServer, self)._fetch_mails()

        res = (
            self.env["fetchmail.server"]
            .sudo()
            .with_context(tz=self.env.user.tz)
            .search([("state", "=", "done")])
        )
        if res:
            res[0].run_time = self._run_time()


class FetchMailImmediately(models.AbstractModel):

    _name = "fetch_mail.imm"

    @api.model
    def get_last_update_time(self):
        res = (
            self.env["fetchmail.server"]
            .sudo()
            .with_context(tz=self.env.user.tz)
            .search([("state", "=", "done")])
        )
        array = [r.run_time for r in res]
        if array:
            return array[0]
        else:
            return None

    @api.model
    def run_fetchmail_manually(self):

        fetchmail_task = self.env.ref("fetchmail.ir_cron_mail_gateway_action")
        fetchmail_model = self.env["fetchmail.server"].sudo()

        fetchmail_task._try_lock()
        fetchmail_model.with_context(run_fetchmail_manually=True)._fetch_mails()