# -*- coding: utf-8 -*-
from django.db import models
from django.conf import settings
from django.db.models.fields.files import FieldFile
from django.db.models.signals import pre_delete
from functions.signal_handlers import file_cleanup

def get_doc_dir(instance, filename):
    from pytils import translit
    return u'import_xls/import/%s' %translit.translify(filename)


class LogManager(models.Manager):
    def create_log(self, work_file, errors):
        """

        :param work_file: executing file
        :param errors: list of errors ([{'event name':['err1', 'err2']}])
        :return: object log
        """
        LOG_DIRECTORY = settings.MEDIA_ROOT+'import_xls/logs/'
        name= '111.txt'
        filename = LOG_DIRECTORY + name

        log_file = open(filename, "w")
        for error in errors:
            event_name = ';'.join(error.keys())
            errs = ''
            for err in error.values():
                errs += '; '.join(err)
                errs += ';'

            log_file.write('%s: %s\n'%(event_name, errs))

        log_file.close()
        #update.log_file.name = 'updates/'+name
        log = Log(work_file=work_file)
        log.log.name = 'import_xls/logs/' + name
        #log = Log.objects.create(work_file=work_file, log=log_file)
        log.save()
        return log

    def create_log_name(self, work_file):
        log = Log.objects.create(work_file=work_file)
        LOG_DIRECTORY = settings.MEDIA_ROOT+'import_xls/logs/'
        name= 'log_%d.log'%log.id
        filename = LOG_DIRECTORY + name
        log_file = open(filename, "w").close()
        log.log.name = 'import_xls/logs/' + name
        log.save()
        return log


class Log(models.Model):
    work_file = models.FileField(upload_to=get_doc_dir)
    log = models.FileField(upload_to='import_xls/logs/', blank=True)
    type = models.CharField(max_length=10, default='IMPORT')
    created = models.DateTimeField(auto_now_add=True)

    objects = models.Manager()
    custom = LogManager()

    class Meta:
        ordering = ['-created']

pre_delete.connect(file_cleanup, sender=Log)