#!/usr/bin/env python

# Sends an error report (if the report-error class was enabled) to a
# remote server.
#
# Copyright (C) 2013 Intel Corporation
# Author: Andreea Proca <andreea.b.proca@intel.com>
# Author: Michael Wood <michael.g.wood@intel.com>

import urllib2
import sys
import json
import os
import subprocess
import argparse
import logging

scripts_lib_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'lib')
sys.path.insert(0, scripts_lib_path)
import argparse_oe

version = "0.3"

log = logging.getLogger("send-error-report")
logging.basicConfig(format='%(levelname)s: %(message)s')

def getPayloadLimit(url):
    req = urllib2.Request(url, None)
    try:
        response = urllib2.urlopen(req)
    except urllib2.URLError as e:
        # Use this opportunity to bail out if we can't even contact the server
        log.error("Could not contact server: " + url)
        log.error(e.reason)
        sys.exit(1)
    try:
        ret = json.loads(response.read())
        max_log_size = ret.get('max_log_size', 0)
        return int(max_log_size)
    except:
        pass

    return 0

def ask_for_contactdetails():
    print("Please enter your name and your email (optionally), they'll be saved in the file you send.")
    username = raw_input("Name (required): ")
    email = raw_input("E-mail (not required): ")
    return username, email

def edit_content(json_file_path):
    edit = raw_input("Review information before sending? (y/n): ")
    if 'y' in edit or 'Y' in edit:
        editor = os.environ.get('EDITOR', None)
        if editor:
            subprocess.check_call([editor, json_file_path])
        else:
            log.error("Please set your EDITOR value")
            sys.exit(1)
        return True
    return False

def prepare_data(args):
    # attempt to get the max_log_size from the server's settings
    max_log_size = getPayloadLimit("http://"+args.server+"/ClientPost/JSON")

    if not os.path.isfile(args.error_file):
        log.error("No data file found.")
        sys.exit(1)

    home = os.path.expanduser("~")
    userfile = os.path.join(home, ".oe-send-error")

    try:
        with open(userfile, 'r') as userfile_fp:
            if len(args.name) == 0:
                args.name = userfile_fp.readline()
            else:
                #use empty readline to increment the fp
                userfile_fp.readline()

            if len(args.email) == 0:
                args.email = userfile_fp.readline()
    except:
        pass

    if args.assume_yes == True and len(args.name) == 0:
        log.error("Name needs to be provided either via "+userfile+" or as an argument (-n).")
        sys.exit(1)

    while len(args.name) <= 0 and len(args.name) < 50:
        print("\nName needs to be given and must not more than 50 characters.")
        args.name, args.email = ask_for_contactdetails()

    with open(userfile, 'w') as userfile_fp:
        userfile_fp.write(args.name.strip() + "\n")
        userfile_fp.write(args.email.strip() + "\n")

    with open(args.error_file, 'r') as json_fp:
        data = json_fp.read()

        jsondata = json.loads(data)
        jsondata['username'] = args.name.strip()
        jsondata['email'] = args.email.strip()
        jsondata['link_back'] = args.link_back.strip()
        # If we got a max_log_size then use this to truncate to get the last
        # max_log_size bytes from the end
        if max_log_size != 0:
            for fail in jsondata['failures']:
                if len(fail['log']) > max_log_size:
                    print "Truncating log to allow for upload"
                    fail['log'] = fail['log'][-max_log_size:]

        data = json.dumps(jsondata, indent=4, sort_keys=True)

    # Write back the result which will contain all fields filled in and
    # any post processing done on the log data
    with open(args.error_file, "w") as json_fp:
        if data:
            json_fp.write(data)


    if args.assume_yes == False and edit_content(args.error_file):
        #We'll need to re-read the content if we edited it
        with open(args.error_file, 'r') as json_fp:
            data = json_fp.read()

    return data


def send_data(data, args):
    headers={'Content-type': 'application/json', 'User-Agent': "send-error-report/"+version}

    if args.json:
        url = "http://"+args.server+"/ClientPost/JSON/"
    else:
        url = "http://"+args.server+"/ClientPost/"

    req = urllib2.Request(url, data=data, headers=headers)
    try:
        response = urllib2.urlopen(req)
    except urllib2.HTTPError, e:
        logging.error(e.reason)
        sys.exit(1)

    print response.read()


if __name__ == '__main__':
    arg_parse = argparse_oe.ArgumentParser(description="This scripts will send an error report to your specified error-report-web server.")

    arg_parse.add_argument("error_file",
                           help="Generated error report file location",
                           type=str)

    arg_parse.add_argument("-y",
                           "--assume-yes",
                           help="Assume yes to all queries and do not prompt",
                           action="store_true")

    arg_parse.add_argument("-s",
                           "--server",
                           help="Server to send error report to",
                           type=str,
                           default="errors.yoctoproject.org")

    arg_parse.add_argument("-e",
                           "--email",
                           help="Email address to be used for contact",
                           type=str,
                           default="")

    arg_parse.add_argument("-n",
                           "--name",
                           help="Submitter name used to identify your error report",
                           type=str,
                           default="")

    arg_parse.add_argument("-l",
                           "--link-back",
                           help="A url to link back to this build from the error report server",
                           type=str,
                           default="")

    arg_parse.add_argument("-j",
                           "--json",
                           help="Return the result in json format, silences all other output",
                           action="store_true")


    args = arg_parse.parse_args()

    if (args.json == False):
        print "Preparing to send errors to: "+args.server

    data = prepare_data(args)
    send_data(data, args)

    sys.exit(0)