#############################################################################
##           This file is part of the Ostendo Resource Manager.            ##
##-------------------------------------------------------------------------##
## Copyright 2007-2008 Bryce Schroeder                                     ##
## bryce.schroeder@gmail.com                                               ##
## http://www.ferazelhosting.net/~bryce/                                   ##
##-------------------------------------------------------------------------##
##  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, either version 3 of the License, or      ##
##  (at your option) any later version.                                    ##
##  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, see <http://www.gnu.org/licenses/>.  ##
#############################################################################
from .g import g
# This file contains the directory of standard interpreters.
# don't add interpreters to it directly.
 
# this is the list of canonical types.
import error
from . import util
from .util import D
from copy import copy
ERROR_DOMAIN = "Resource Manager"
ERROR_INDENT = 2


# all of the headers are followed by a parameter line,
# which is a python tuple prefixed by a length byte.
HEADER_LOAD = "~OSTENDO-01 LOAD\n"
# (server name, pack name, number of restypes)

HEADER_RESTYPE = "\n\n~OSTENDO-01 RESTYPE\n"
# (typename, number of resources of this type)

HEADER_RESOURCE = "\n\n~OSTENDO-01 RESOURCE\n"
# parameters: (part count, name)

HEADER_PART = "\n\n~OSTENDO-01 PART\n"
# (part name, part length)


e = error.Error_Messenger(ERROR_DOMAIN,ERROR_INDENT)
class R:
    """Resource reference"""
    def __init__(self, type, name, func=(lambda x: x)):
        self.type = type
        self.name = name
        self.func = func
    def resolve(self, resman):
        return self.func(resman.get(self.type, self.name))
        

class Resource(object):
    """This class is the base class for a resource interpreter. 
       it gets a list of strings and presents them however it likes.
       The list data is of the form [(data,part-name), ...]"""
    MANDATORY = []
    CONSTANTS = {}
    __OSTENDO_RESOURCE__ = True
    #OPTIONAL = []
    def __init__(self, manager, type, name, data_list):
        self.manager = manager
        self.name = name
        self.type = type
        self.parts = {}
        for data, part in data_list:
            self.parts[part] = data
        
        for needed in self.MANDATORY:
            if not self.parts.has_key(needed):
                e.err("(%s:'%s') is missing required part '%s'."%(
                            self.type,self.name,needed))
        self.init()
    def resolve(self, dict = None):
        """This function is called after all resources are loaded."""
        if not dict: dict = self.__dict__
        for k,v in dict.items():
            if isinstance(v, R):
                dict[k] = v.resolve(self.manager)
        if self.__dict__.has_key('meta'):
            for k,v in self.meta.items():
                if isinstance(v,R):
                    self.meta[k] = v.resolve(self.manager)
        if dict is self.__dict__: self.user_resolve()
    def user_resolve(self):
        return
    def open(self, part=None):
        if part:
            return cStringIO.StringIO(self.parts[part])
        else:
            return cStringIO.StringIO(self.parts.values()[0])
        
    def parts(self):
        return self.parts.keys()    
    def write_out(self, file):
        file.write(HEADER_RESOURCE)
        parameters = "(%d, '%s')\n"%(len(self.parts), self.name)
        file.write(chr(len(parameters))+parameters)
        for partname, part in self.parts.items():
            file.write(HEADER_PART)
            parameters = "('%s', %d)\n"%(partname, len(part))
            file.write(chr(len(parameters))+parameters)
            file.write(part)
               
    def process_meta(self, data):
        """Process standard-format Ostendo meta-data."""
        tdict = copy(self.CONSTANTS)
        exec(data, globals(), tdict)
        return tdict
    def integrate_dict(self, mydict):
        for k,v in mydict.items():
            self.__dict__[k] = v
    def get_meta(self,key):
            return self.meta[key]
    def __getitem__(self, key):
        if self.meta.has_key(key):
            return self.meta[key]
        else:
            return None
    def integrate(self):
        pass
    def init(self):
        pass

import glob, os.path


CANON = {}

if __name__ == 'standard_interpreters':
    import standard_interpreters
    path = os.path.split(standard_interpreters.__file__)[0]
    types = glob.glob(os.path.join(path, '*.py'))
    for item in types:
    	item = os.path.splitext(os.path.split(item)[1])[0]
    	if item == '__init__': continue
        _mod = __import__('standard_interpreters.' + item, fromlist=[item])
        if hasattr(_mod, item):
			CANON[item] = getattr(_mod, item)
    
    print "\t * Standard Resource Interpreter Classes:"
    for item in CANON:
        print "\t\t%s"%item