#!/usr/bin/env python
import sys
from os import path
import logging

sys.path.append(path.join(path.dirname(__file__), '../api'))
import zulip

class StreamLogger(object):
    """
    Give a file-like interface to a logger instance.
    """
    def __init__(self, logger, log_level=logging.INFO):
        self.logger = logger
        self.log_level = log_level
        self.buffer = ""

    def write(self, message):
        self.buffer += message

        if message[-1] == "\n":
            self.logger.log(self.log_level, self.buffer.rstrip())
            self.buffer = ""

logging.basicConfig(filename="/var/log/humbug/feedback-bot.log",
                    level=logging.DEBUG, format="%(asctime)s %(levelname)s\t%(message)s")

# The API prints to stdout, so capture and format those messages as well.
stdout_logger = StreamLogger(logging.getLogger("stdout"), logging.INFO)
sys.stdout = stdout_logger

stderr_logger = StreamLogger(logging.getLogger("stderr"), logging.ERROR)
sys.stderr = stderr_logger

prod_client = zulip.Client(
    email="feedback@zulip.com",
    api_key="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    verbose=True,
    site="https://api.zulip.com")
staging_client = zulip.Client(
    email="feedback@zulip.com",
    api_key="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    verbose=True,
    site="https://staging.zulip.com/api")

def forward_message(message):
    if message["type"] != "private" or len(message["display_recipient"]) != 2:
        return
    if "sender_domain" in message:
        subject = "feedback: %s (%s)" % (message["sender_email"], message["sender_domain"])
    else:
        subject = "feedback from %s" % message["sender_email"],
    if len(subject) > 60:
        subject = subject[:57].rstrip() + "..."
    forwarded_message = {
        "type": "stream",
        "to": "support",
        "subject": subject,
        "content": message["content"],
        }
    staging_client.send_message(forwarded_message)
    logging.info("Forwarded feedback from %s" % (message["sender_email"],))

prod_client.call_on_each_message(forward_message)