# -*- coding: utf-8 -*-

from subprocess import check_output
import pytz
import os
import multiprocessing

from odoo import models, fields, api, tools


class ChangeLog(models.Model):
    _name = 'dp.changelog'
    _description = 'Changelogs'
    _order = 'id desc'

    @api.model
    def _get_changelog_name(self):
        """
        Returns the default name for the changelog table
        :return:
        """
        tz_name = self.env.context.get('tz') or tools.config.get('timezone')
        date_string = fields.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        date_string = fields.Datetime.to_string(
            pytz.timezone('UTC').localize(fields.Datetime.from_string(date_string),
                                          is_dst=None).astimezone(
                pytz.timezone(tz_name)))
        return 'Changelog ' + date_string[:-3]

    name = fields.Char('Name', required=True, default=_get_changelog_name)
    date = fields.Datetime('Timestamp', required=True, default=lambda *a: fields.datetime.now())
    commit = fields.Char('Commit')
    changelogs = fields.Text('Changelogs')
    ppid = fields.Char('letzte ppid')

    @api.model
    def cron_get_changelog(self):
        vals = self._get_changelogs_vals()
        changelog = False
        if vals:
            changelog = self.create(vals)
        return changelog

    @api.model
    def _get_changelogs_vals(self):
        commit = check_output(["git", "log", "--pretty=oneline", "-1"])
        last_commit = self.search([], limit=1)
        com2 = commit.decode("utf-8")
        com2 = com2.split(' ')[0]
        new_logs = b''
        news = False
        vals = {}
        if last_commit:
            com1 = last_commit.commit
            changelogs = check_output(["git", "log", "--pretty=oneline", com1 + "..." + com2])
            for changelog in changelogs.splitlines():
                new_logs += b' '.join(changelog.split(b' ')[1:]) + b'\n'
            if not new_logs == b'':
                news = True
        else:
            news = True

        if news:
            vals = {
                'commit': com2,
                'changelogs': new_logs,
                'ppid': last_commit.ppid
            }
        return vals

    @api.model
    def _get_reboot_vals(self):
        last_commit = self.search([], limit=1)
        workers = 1
        vals = {}
        if tools.config.get('workers', False):
            workers = tools.config.get('workers', False)
        if last_commit:
            if workers > 1 and last_commit.ppid != str(os.getppid()):
                vals = {
                    'commit': last_commit.commit,
                    'changelogs': 'Reboot',
                    'ppid': str(os.getppid())
                    }
            if last_commit.ppid != str(os.getpid()):
                vals = {
                    'commit': last_commit.commit,
                    'changelogs': 'Reboot',
                    'ppid': str(os.getpid())
                }
            return vals

    @api.model_cr
    def _register_hook(self):
        try:
            self.cron_get_changelog()
            vals = self._get_reboot_vals()
            if vals:
                self.create(vals)
        except:
            # falls git nicht vorhanden ist wird sicher eine Fehler ausgegeben.
            pass