import re

from django.conf import settings as djsettings
from django.core.management.base import BaseCommand
from django.db import connections

from orchestra import settings, get_version
from orchestra.utils import paths
from orchestra.utils.sys import run

from .startservices import flatten


class Command(BaseCommand):
    def is_running(self, context, ps):
        if context['service'] == 'uwsgi':
            regex = r'.*uwsgi .*/%(project_name)s.ini.*' % context
        else:
            regex = r'.*%(service)s.*' % context
        return re.match(regex, ps)
    
    def handle(self, *args, **options):
        context = {
            'project_name': paths.get_project_name(),
            'site_dir': paths.get_site_dir(),
        }
        banner = "%(project_name)s status" % context
        self.stdout.write(banner)
        self.stdout.write('-'*len(banner))
        self.stdout.write(' Orchestra version: ' + get_version())
        if djsettings.DEBUG:
            self.stdout.write(" debug enabled")
        else:
            self.stdout.write(" debug disabled")
        ps = run('ps aux').stdout.decode().replace('\n', ' ')
        for service in flatten(settings.ORCHESTRA_START_SERVICES):
            context['service'] = service
            if self.is_running(context, ps):
                self.stdout.write(" %(service)s online" % context)
            else:
                self.stdout.write(" %(service)s offline" % context)
            if service == 'nginx':
                try:
                    config_path = '/etc/nginx/sites-enabled/%(project_name)s.conf' % context
                    with open(config_path, 'r') as handler:
                        config = handler.read().replace('\n', ' ')
                except FileNotFoundError:
                    self.stdout.write("   * %s not found" % config_path)
                else:
                    regex = r'location\s+([^\s]+)\s+{.*uwsgi_pass unix:///var/run/uwsgi/app/%(project_name)s/socket;.*' % context
                    location = re.findall(regex, config)
                    if location:
                        ip = run("ip a | grep 'inet ' | awk {'print $2'} | grep -v '^127.0.' | head -n 1 | cut -d'/' -f1").stdout.decode()
                        if not ip:
                            ip = '127.0.0.1'
                        location = 'http://%s%s' % (ip, location[0])
                        self.stdout.write("   * location %s" % location)
                    else:
                        self.stdout.write("   * location not found")
            elif service == 'postgresql':
                db_conn = connections['default']
                try:
                    c = db_conn.cursor()
                except OperationalError:
                    self.stdout.write("   * DB connection failed")
                else:
                    self.stdout.write("   * DB connection succeeded")
            elif service == 'uwsgi':
                uwsgi_config = '/etc/uwsgi/apps-enabled/%(project_name)s.ini' % context
                if os.path.isfile(uwsgi_config):
                    self.stdout.write("   * %s exists" % uwsgi_config)
                else:
                    self.stdout.write("   * %s does not exist" % uwsgi_config)
        cronbeat = 'crontab -l | grep "^.*/orchestra-beat %(site_dir)s/manage.py"' % context
        if run(cronbeat, valid_codes=(0, 1)).exit_code == 0:
            self.stdout.write(" cronbeat installed")
        else:
            self.stdout.write(" cronbeat not installed")