#!/usr/bin/env python2
# -*- coding: utf-8 -*-
"""
    Blockstack-client
    ~~~~~
    copyright: (c) 2014-2015 by Halfmoon Labs, Inc.
    copyright: (c) 2016 by Blockstack.org

    This file is part of Blockstack-client.

    Blockstack-client is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Blockstack-client is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    You should have received a copy of the GNU General Public License
    along with Blockstack-client.  If not, see <http://www.gnu.org/licenses/>.
"""

import os
import sys

if sys.version_info.major != 2:
    raise Exception("Python 3 is not supported")

if sys.version_info.minor < 7:
    raise Exception("Python 2.7 or greater is required")

import traceback
import json

# Hack around absolute paths
current_dir = os.path.abspath(os.path.dirname(__file__))
parent_dir = os.path.abspath(current_dir + "/../")

sys.path.insert(0, parent_dir)

from blockstack_client.cli import run_cli, exit_with_error
from blockstack_client.config import get_logger, configure, CONFIG_PATH, client_uuid_path, VERSION
from blockstack_client.client import analytics_event, analytics_user_register, analytics_user_update
from blockstack_client.utils import pretty_print


def enable_debug( argv ):
    """
    If '--debug' was passed, then activate debugging
    by re-execing with BLOCKSTACK_DEBUG=1 set.
    """
    new_argv = []

    set_envar = False

    debug = (os.environ.get("BLOCKSTACK_DEBUG", None) == "1")
    set_debug = False

    for arg in argv: 
        if not debug and arg in ['-v', '-d', '--verbose', '--debug']:
            # will set debug 
            set_debug = True
            set_envar = True

        else:
            # skip 
            new_argv.append(arg)

    if set_envar:
        if set_debug:
            os.environ["BLOCKSTACK_DEBUG"] = "1"

        os.execv( new_argv[0], new_argv )

    return True


if __name__ == '__main__':

    log = get_logger()
    enable_debug( sys.argv )

    uuid_path = client_uuid_path()
    first_time = False

    if not os.path.exists(uuid_path):
        first_time = True

    # make sure we have sane defaults, and we have registered this installation
    res = configure(interactive=False, force=False)
    if res.has_key('uuid') and first_time:
        # prompt for email 
        print "Would you like to receive an email when there is a new release of this software available?"
        email_addr = raw_input("Email address (leave blank to opt out): ")

        # will only process real email addresses when we email announcements out
        analytics_user_register( res['uuid'], email_addr )
       
    try:
        result = run_cli()
        if isinstance(result, dict) and 'error' in result:
            print >> sys.stderr, result['error']
            sys.exit(1)
        else:
            print json.dumps(result, indent=4, sort_keys=True)
            sys.exit(0)

    except Exception as e:
        log.exception(e)
        error_message = "Unexpected error:\n%s" % traceback.format_exc()
        help_message = 'Try getting latest version of CLI'
        help_message += ' with "sudo pip install blockstack --upgrade"'
        exit_with_error(error_message, help_message)