#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=80 tabstop=4 softtabstop=4

###############################################################################
# OpenLP - Open Source Lyrics Projection                                      #
# --------------------------------------------------------------------------- #
# Copyright (c) 2011 Raoul Snyman                                             #
# --------------------------------------------------------------------------- #
# This program 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; version 2 of the License.                              #
#                                                                             #
# This program 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 this program; if not, write to the Free Software Foundation, Inc., 59  #
# Temple Place, Suite 330, Boston, MA 02111-1307 USA                          #
###############################################################################

"""
This script is used to check dependencies of OpenLP. It checks availability
of required python modules and their version. To verify availability of Python
modules, simply run this script::

    @:~$ ./check_dependencies.py

"""
import os
import sys

is_win = sys.platform.startswith('win')

VERS = {
    'Python': '2.6',
    'PyQt4': '4.6',
    'Qt4': '4.6',
    'sqlalchemy': '0.5',
    # pyenchant 1.6 required on Windows
    'enchant': '1.6' if is_win else '1.3'
    }

# pywin32
WIN32_MODULES = [
    'win32com',
    'win32ui',
    'pywintypes',
    ]

MODULES = [
    'PyQt4',
    'PyQt4.QtCore',
    'PyQt4.QtGui',
    'PyQt4.QtNetwork',
    'PyQt4.QtOpenGL',
    'PyQt4.QtSvg',
    'PyQt4.QtTest',
    'PyQt4.QtWebKit',
    'PyQt4.phonon',
    'sqlalchemy',
    'sqlite3',
    'lxml',
    'chardet',
    'enchant',
    'BeautifulSoup',
    'mako',
    ]


OPTIONAL_MODULES = [
    ('sqlite', ' (SQLite 2 support)'),
    ('MySQLdb', ' (MySQL support)'),
    ('psycopg2', ' (PostgreSQL support)'),
    ]

w = sys.stdout.write


def check_vers(version, required, text):
    if type(version) is str:
        version = version.split('.')
        version = [int(x) for x in version]
    if type(required) is str:
        required = required.split('.')
        required = [int(x) for x in required]
    w('  %s >= %s ...    ' % (text, '.'.join([str(x) for x in required])))
    if version >= required:
        w('.'.join([str(x) for x in version]) + os.linesep)
        return True
    else:
        w('FAIL' + os.linesep)
        return False


def verify_python():
    if not check_vers(list(sys.version_info), VERS['Python'], text='Python'):
        exit(1)


def verify_versions():
    print('Verifying version of modules...')
    from PyQt4 import QtCore
    check_vers(QtCore.PYQT_VERSION_STR, VERS['PyQt4'],
        'PyQt4')
    check_vers(QtCore.qVersion(), VERS['Qt4'],
        'Qt4')
    check_vers(__import__('sqlalchemy').__version__, VERS['sqlalchemy'],
        'sqlalchemy')
    check_vers(__import__('enchant').__version__, VERS['enchant'],
        'enchant')


def check_module(mod, text='', indent='  '):
    space = (30 - len(mod) - len(text)) * ' '
    w(indent + '%s%s...  ' % (mod, text) + space)
    try:
        __import__(mod)
        w('OK')
    except ImportError:
        w('FAIL')
    w(os.linesep)


def main():

    verify_python()

    print('Checking for modules...')
    for m in MODULES:
        check_module(m)

    print('Checking for optional modules...')
    for m in OPTIONAL_MODULES:
        check_module(m[0], text=m[1])

    if sys.platform.startswith('win'):
        print('Checking for Windows specific modules...')
        for m in WIN32_MODULES:
            check_module(m)

    verify_versions()


if __name__ == u'__main__':
    main()