# sending the email
# ----------
import sys
import mandrill


API_KEY = 'API_KEY_HERE'


def send_mail(template_name, file_name, batch_size=2, starting_pos=0):
    mandrill_client = mandrill.Mandrill(API_KEY)

    if file_name:
        try:
            f = open(file_name, 'r')
        except:
            print "Unexpected error:", sys.exc_info()[0]

    email_list  = f.read().split('\n')
    if starting_pos < len(email_list):
        for em in email_list[starting_pos:starting_pos+batch_size]:
            message = {
                'to': []
            }
            message['to'].append({'email': em})
            mandrill_client.messages.send_template(template_name, [], message)
    else:
        print "Starting position is greater than the size of the mailing list"
        return 0


    return starting_pos+batch_size

if __name__ == '__main__':
    file_name = "email_list.txt"
    batch_size = 302
    starting_pos = 1200
    print "Starting to send %d emails starting from position %d" % (batch_size, starting_pos)
    pos = send_mail(template_name='newsletter-confirm-subscription',
              file_name=file_name,
              batch_size=batch_size,
              starting_pos=starting_pos)
    print "The new starting pos is %d" % (pos)