# Copyright (c) 2011 Advanced Micro Devices, Inc.
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# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
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from slicc.ast.DeclAST import DeclAST
from slicc.symbols import Func, Type

class StateDeclAST(DeclAST):
    def __init__(self, slicc, type_ast, pairs, states):
        super(StateDeclAST, self).__init__(slicc, pairs)

        self.type_ast = type_ast
        self.states = states

    def __repr__(self):
        return "[StateDecl: %s]" % (self.type_ast)

    def files(self, parent=None):
        if "external" in self:
            return set()

        if parent:
            ident = "%s_%s" % (parent, self.type_ast.ident)
        else:
            ident = self.type_ast.ident
        s = set(("%s.hh" % ident, "%s.cc" % ident))
        return s

    def generate(self):
        ident = str(self.type_ast)

        # Make the new type
        t = Type(self.symtab, ident, self.location, self.pairs,
                 self.state_machine)
        self.symtab.newSymbol(t)

        # Add all of the states of the type to it
        for state in self.states:
            state.generate(t)

        # Add the implicit State_to_string method - FIXME, this is a bit dirty
        func_id = "%s_to_string" % t.c_ident

        pairs = { "external" : "yes" }
        func = Func(self.symtab, func_id, self.location,
                    self.symtab.find("std::string", Type), [ t ], [], "",
                    pairs, None)
        self.symtab.newSymbol(func)

        # Add the State_to_permission method
        func_id = "%s_to_permission" % t.c_ident

        pairs = { "external" : "yes" }
        func = Func(self.symtab, func_id, self.location,
                    self.symtab.find("AccessPermission", Type), [ t ], [], "",
                    pairs, None)
        self.symtab.newSymbol(func)
