#
# Copyright (c) 2017 Advanced Micro Devices, Inc.
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from slicc.ast.StatementAST import StatementAST
from slicc.symbols import Var


class DeferEnqueueingStatementAST(StatementAST):
    def __init__(self, slicc, queue_name, type_ast, statements):
        super().__init__(slicc)

        self.queue_name = queue_name
        self.type_ast = type_ast
        self.statements = statements

    def __repr__(self):
        return "[DeferEnqueueingStatementAst: %s %s %s]" % (
            self.queue_name,
            self.type_ast.ident,
            self.statements,
        )

    def generate(self, code, return_type, **kwargs):
        code("{")
        code.indent()
        self.symtab.pushFrame()

        msg_type = self.type_ast.type

        # Add new local var to symbol table
        v = Var(
            self.symtab,
            "out_msg",
            self.location,
            msg_type,
            "*out_msg",
            self.pairs,
        )
        self.symtab.newSymbol(v)

        # Declare message
        code(
            "std::shared_ptr<${{msg_type.c_ident}}> out_msg = "
            "std::make_shared<${{msg_type.c_ident}}>(clockEdge());"
        )

        # The other statements
        t = self.statements.generate(code, None)
        self.queue_name.assertType("OutPort")

        code(
            "(${{self.queue_name.var.code}}).deferEnqueueingMessage(addr, "
            "out_msg);"
        )

        # End scope
        self.symtab.popFrame()
        code.dedent()
        code("}")

    def findResources(self, resources):
        var = self.queue_name.var
        res_count = int(resources.get(var, 0))
        resources[var] = str(res_count + 1)