#!/usr/bin/env python
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"""Factory method to retrieve the appropriate port implementation."""


import sys

ALL_PORT_NAMES = ['test', 'dryrun', 'mac', 'win', 'gtk', 'qt', 'chromium-mac',
                  'chromium-linux', 'chromium-win', 'google-chrome-win',
                  'google-chrome-mac', 'google-chrome-linux32', 'google-chrome-linux64']


def get(port_name=None, options=None, **kwargs):
    """Returns an object implementing the Port interface. If
    port_name is None, this routine attempts to guess at the most
    appropriate port on this platform."""
    # Wrapped for backwards-compatibility
    if port_name:
        kwargs['port_name'] = port_name
    if options:
        kwargs['options'] = options
    return _get_kwargs(**kwargs)


def _get_kwargs(**kwargs):
    port_to_use = kwargs.get('port_name', None)
    options = kwargs.get('options', None)
    if port_to_use is None:
        if sys.platform == 'win32' or sys.platform == 'cygwin':
            if options and hasattr(options, 'chromium') and options.chromium:
                port_to_use = 'chromium-win'
            else:
                port_to_use = 'win'
        elif sys.platform == 'linux2':
            port_to_use = 'chromium-linux'
        elif sys.platform == 'darwin':
            if options and hasattr(options, 'chromium') and options.chromium:
                port_to_use = 'chromium-mac'
            else:
                port_to_use = 'mac'

    if port_to_use is None:
        raise NotImplementedError('unknown port; sys.platform = "%s"' %
                                  sys.platform)

    if port_to_use == 'test':
        import test
        maker = test.TestPort
    elif port_to_use.startswith('dryrun'):
        import dryrun
        maker = dryrun.DryRunPort
    elif port_to_use.startswith('mac'):
        import mac
        maker = mac.MacPort
    elif port_to_use.startswith('win'):
        import win
        maker = win.WinPort
    elif port_to_use.startswith('gtk'):
        import gtk
        maker = gtk.GtkPort
    elif port_to_use.startswith('qt'):
        import qt
        maker = qt.QtPort
    elif port_to_use.startswith('chromium-gpu'):
        import chromium_gpu
        maker = chromium_gpu.get
    elif port_to_use.startswith('chromium-mac'):
        import chromium_mac
        maker = chromium_mac.ChromiumMacPort
    elif port_to_use.startswith('chromium-linux'):
        import chromium_linux
        maker = chromium_linux.ChromiumLinuxPort
    elif port_to_use.startswith('chromium-win'):
        import chromium_win
        maker = chromium_win.ChromiumWinPort
    elif port_to_use.startswith('google-chrome'):
        import google_chrome
        maker = google_chrome.GetGoogleChromePort
    else:
        raise NotImplementedError('unsupported port: %s' % port_to_use)
    return maker(**kwargs)

def get_all(options=None):
    """Returns all the objects implementing the Port interface."""
    return dict([(port_name, get(port_name, options=options))
                 for port_name in ALL_PORT_NAMES])