# Copyright (C) 2006-2012 Mortal Coil Games
# See LICENSE for details.
"""
This module provides a Twisted plugin which can run an MV3D server.
"""

import os
import sys
from StringIO import StringIO
from ConfigParser import ConfigParser

from zope.interface import implements #@UnresolvedImport

from twisted.plugin import IPlugin
from twisted.application.service import IServiceMaker
from twisted.python.usage import Options
from twisted.internet import reactor



class MV3DOptions(Options):
    """
    Command-line options for the MV3D server.
    """

    optParameters = [
        ('config-file', 'c', "server.conf",
            'The file to load configuration from.'),
        ('config-name', 'm', "Server",
            'The section name in the config file to read from.'),
        ('port', 'p', 1999, 'Set the Port to listen on.'),
        ('worldgen-factory', 'f', 'mv3d.server.worldgen.WorldGenerator',
            'The class of a factory to use to bootstrap the server\'s world'),
        ('worldgen-template', 'w', None, 'A template file to use to initialize'
            'the world from.'),
        ('import-from', 'I', None, 'Frozen file to import the world from'),
        ('num-players', 'n', 0,
            'Set the number of players to create if initialize=1'),
        ('num-cubes', 'C', 0,
            'Set the number of cubes to create if initialize=1'),
        ('terrain-size', 't', 0, 'Number of terrains to create'),
        ('trees', 'T', 0, 'Set the number of trees'),
    ]
    optFlags = [
        ('initialize', 'i', 'Initialize a world'),
        ('grass', 'g', 'Enable grass'),
    ]



class MV3DServerPlugin(object):
    """
    A very basic Twisted plugin for the mv3d server.
    """
    implements(IServiceMaker, IPlugin)
    tapname = "mv3d"
    description = "MV3D Server"
    options = MV3DOptions

    def makeService(self, mv3dOptions):
        """
        Create a Twisted service based on the mv3dOptions instance 
        provided to us.
        """
        from mv3d.util.conductor import Conductor
        from mv3d.server.worldgen import setupServer
        conductor = Conductor()
        cfg = ConfigParser()
        configFile = None
        if mv3dOptions["config-file"] != "-":
            cfg.read(mv3dOptions["config-file"])
            cfg.read(os.path.join("conf", mv3dOptions["config-file"]))
            name = mv3dOptions["config-name"]
            configFile = mv3dOptions["config-file"]
        else:
            name = sys.stdin.readline().strip()
            cfg.readfp(StringIO(sys.stdin.read()))
        conductor.configure(name, cfg, configFile)
        reactor.callLater(0.2, setupServer, conductor, #@UndefinedVariable
            mv3dOptions)
        return conductor



thePlugin = MV3DServerPlugin()