import os

from django.utils.translation import ugettext_lazy as _

from orchestra.apps.orchestration import ServiceBackend

from . import WebAppServiceMixin
from .. import settings


class PHPFcgidBackend(WebAppServiceMixin, ServiceBackend):
    verbose_name = _("PHP-Fcgid")
    
    def save(self, webapp):
        context = self.get_context(webapp)
        self.create_webapp_dir(context)
        self.append("mkdir -p %(wrapper_dir)s" % context)
        self.append(
            "{ echo -e '%(wrapper_content)s' | diff -N -I'^\s*#' %(wrapper_path)s - ; } ||"
            "  { echo -e '%(wrapper_content)s' > %(wrapper_path)s; UPDATED=1; }" % context)
        self.append("chmod +x %(wrapper_path)s" % context)
        self.append("chown -R %(user)s.%(group)s %(wrapper_dir)s" % context)
    
    def delete(self, webapp):
        context = self.get_context(webapp)
        self.delete_webapp_dir(context)
    
    def get_context(self, webapp):
        context = super(PHPFcgidBackend, self).get_context(webapp)
        init_vars = webapp.get_php_init_vars()
        if init_vars:
            init_vars = [ '%s="%s"' % (k,v) for v,k in init_vars.iteritems() ]
            init_vars = ', -d '.join(init_vars)
            context['init_vars'] = '-d %s' % init_vars
        else:
            context['init_vars'] = ''
        wrapper_path = settings.WEBAPPS_FCGID_PATH % context
        context.update({
            'wrapper_content': (
                "#!/bin/sh\n"
                "# %(banner)s\n"
                "export PHPRC=/etc/%(type)s/cgi/\n"
                "exec /usr/bin/%(type)s-cgi %(init_vars)s\n"
                ) % context,
            'wrapper_path': wrapper_path,
            'wrapper_dir': os.path.dirname(wrapper_path),
        })
        return context