#!/usr/bin/env python3

# Copyright (c) 2021 CINN Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from cinn.common import *
from cinn.frontend import *
from op_test import OpTest, OpTestTool
from op_test_helper import TestCaseHelper

import paddle


@OpTestTool.skip_if(
    not is_compiled_with_cuda(), "x86 test will be skipped due to timeout."
)
class TestGaussianRandomOp(OpTest):
    def setUp(self):
        # print(f"\n{self.__class__.__name__}: {self.case}")
        pass

    def build_paddle_program(self, target):
        out = paddle.tensor.random.gaussian(
            shape=self.case["shape"],
            mean=self.case["mean"],
            std=self.case["std"],
            dtype=self.case["dtype"],
        )
        self.paddle_outputs = [out]

    def build_cinn_program(self, target):
        builder = NetBuilder("gaussian_random")
        out = builder.gaussian_random(
            self.case["shape"],
            self.case["mean"],
            self.case["std"],
            self.case["seed"],
            self.case["dtype"],
        )
        prog = builder.build()
        res = self.get_cinn_output(prog, target, [], [], [out], passes=[])
        self.cinn_outputs = res

    def test_check_results(self):
        # Due to the different random number generation numbers implemented
        # in the specific implementation, the random number results generated
        # by CINN and Paddle are not the same, but they all conform to the
        # Uniform distribution.
        self.check_outputs_and_grads(
            max_relative_error=10000, max_absolute_error=10000
        )


class TestGaussianRandomOpShape(TestCaseHelper):
    def init_attrs(self):
        self.class_name = "TestGaussianRandomOpCase"
        self.cls = TestGaussianRandomOp
        self.inputs = [
            {
                "shape": [1],
            },
            {
                "shape": [1024],
            },
            {
                "shape": [512, 256],
            },
            {
                "shape": [128, 64, 32],
            },
            {
                "shape": [16, 8, 4, 2],
            },
            {
                "shape": [16, 8, 4, 2, 1],
            },
        ]
        self.dtypes = [
            {
                "dtype": "float32",
            },
        ]
        self.attrs = [
            {
                "mean": 0.0,
                "std": 0.0,
                "seed": 1234,
            },
        ]


class TestGaussianRandomOpDtype(TestCaseHelper):
    def init_attrs(self):
        self.class_name = "TestGaussianRandomOpCase"
        self.cls = TestGaussianRandomOp
        self.inputs = [
            {
                "shape": [1024],
            },
        ]
        self.dtypes = [
            {
                "dtype": "float32",
            },
            {
                "dtype": "float64",
            },
        ]
        self.attrs = [
            {
                "mean": 0.0,
                "std": 0.0,
                "seed": 1234,
            },
        ]


class TestGaussianRandomOpAttr(TestCaseHelper):
    def init_attrs(self):
        self.class_name = "TestGaussianRandomOpCase"
        self.cls = TestGaussianRandomOp
        self.inputs = [
            {
                "shape": [1024],
            },
        ]
        self.dtypes = [
            {
                "dtype": "float32",
            },
        ]
        self.attrs = [
            {
                "mean": 1.0,
                "std": 0.0,
                "seed": 1,
            },
            {
                "mean": 0.0,
                "std": 1.0,
                "seed": 2,
            },
            {
                "mean": 1.0,
                "std": 1.0,
                "seed": 3,
            },
        ]


if __name__ == "__main__":
    TestGaussianRandomOpShape().run()
    TestGaussianRandomOpDtype().run()
    TestGaussianRandomOpAttr().run()