# -*- Python -*-
# This file is licensed under a pytorch-style license
# See frontends/pytorch/LICENSE for license information.

import typing

import torch
import torch_mlir

# RUN: %PYTHON %s | npcomp-opt | FileCheck %s

mb = torch_mlir.ModuleBuilder()

# Interesting test case, where a function calls a method.

# CHECK-LABEL:     func private @__torch__.TestModule.forward
# CHECK-SAME:        (%[[ARG0:.*]]: !torch.nn.Module<"__torch__.TestModule">, %[[ARG1:.*]]: !torch.tensor) -> !basicpy.NoneType {
# CHECK:             %[[F:.*]] = constant @__torch__.calls_method : (!torch.nn.Module<"__torch__.TestModule">, !torch.tensor) -> !basicpy.NoneType
# CHECK:             %[[RET:.*]] = call_indirect %[[F]](%[[ARG0]], %[[ARG1]]) : (!torch.nn.Module<"__torch__.TestModule">, !torch.tensor) -> !basicpy.NoneType
# CHECK:             return %[[RET]] : !basicpy.NoneType
# CHECK:           }
# CHECK-LABEL:     func private @__torch__.TestModule.method
# CHECK-SAME:        (%[[ARG0:.*]]: !torch.nn.Module<"__torch__.TestModule">, %[[ARG1:.*]]: !torch.tensor) -> !basicpy.NoneType {
# CHECK:             %[[RET:.*]] = basicpy.singleton : !basicpy.NoneType
# CHECK:             return %[[RET]] : !basicpy.NoneType
# CHECK:           }
# CHECK-LABEL:     func private @__torch__.calls_method
# CHECK-SAME:        (%[[ARG0:.*]]: !torch.nn.Module<"__torch__.TestModule">, %[[ARG1:.*]]: !torch.tensor) -> !basicpy.NoneType {
# CHECK:             %[[RET:.*]] = torch.prim.CallMethod %[[ARG0]]["method"] (%[[ARG1]]) : !torch.nn.Module<"__torch__.TestModule">, (!torch.tensor) -> !basicpy.NoneType
# CHECK:             return %[[RET]] : !basicpy.NoneType
# CHECK:           }

def calls_method(c: 'TestModule', x):
    return c.method(x)

class TestModule(torch.nn.Module):
    def __init__(self):
        super().__init__()
    def forward(self, x):
        return calls_method(self, x)
    @torch.jit.export # Needed so that scripting sees it.
    def method(self, x):
        return

test_module = TestModule()
recursivescriptmodule = torch.jit.script(test_module)
# TODO: Automatically handle unpacking Python class RecursiveScriptModule into the underlying ScriptModule.
mb.import_module(recursivescriptmodule._c)
mb.module.operation.print()