#  Copyright (c) 2021 PaddlePaddle 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 __future__ import print_function

import numpy as np
import unittest
import sys
sys.path.append("..")
from op_test import OpTest
import paddle
import paddle.fluid as fluid
from paddle.fluid import core


class TestSetValueBase(unittest.TestCase):
    def set_npu(self):
        self.__class__.use_npu = True
        self.place = paddle.NPUPlace(0)

    def setUp(self):
        paddle.enable_static()
        self.set_npu()
        self.set_dtype()
        self.set_value()
        self.set_shape()
        self.data = np.ones(self.shape).astype(self.dtype)
        self.program = paddle.static.Program()

    def set_shape(self):
        self.shape = [2, 3, 4]

    def set_value(self):
        self.value = 6

    def set_dtype(self):
        self.dtype = "float32"

    def _call_setitem(self, x):
        x[0, 0] = self.value

    def _get_answer(self):
        self.data[0, 0] = self.value


class TestSetValueApi(TestSetValueBase):
    def _run_static(self):
        paddle.enable_static()
        with paddle.static.program_guard(self.program):
            x = paddle.ones(shape=self.shape, dtype=self.dtype)
            self._call_setitem(x)

        exe = paddle.static.Executor(self.place)
        out = exe.run(self.program, fetch_list=[x])
        paddle.disable_static()
        return out

    def _run_dynamic(self):
        paddle.disable_static(self.place)
        x = paddle.ones(shape=self.shape, dtype=self.dtype)
        self._call_setitem(x)
        out = x.numpy()
        paddle.enable_static()
        return out

    def test_api(self):
        static_out = self._run_static()
        dynamic_out = self._run_dynamic()
        self._get_answer()

        error_msg = "\nIn {} mode: \nExpected res = \n{}, \n\nbut received : \n{}"
        self.assertTrue(
            (self.data == static_out).all(),
            msg=error_msg.format("static", self.data, static_out))
        self.assertTrue(
            (self.data == dynamic_out).all(),
            msg=error_msg.format("dynamic", self.data, dynamic_out))


# 1. Test different type of item: int, Python slice, Paddle Tensor
# 1.1 item is int
class TestSetValueItemInt(TestSetValueApi):
    def _call_setitem(self, x):
        x[0] = self.value

    def _get_answer(self):
        self.data[0] = self.value


# 1.2 item is slice
# 1.2.1 step is 1
class TestSetValueItemSlice(TestSetValueApi):
    def _call_setitem(self, x):
        x[0:2] = self.value

    def _get_answer(self):
        self.data[0:2] = self.value


class TestSetValueItemSlice2(TestSetValueApi):
    def _call_setitem(self, x):
        x[0:-1] = self.value

    def _get_answer(self):
        self.data[0:-1] = self.value


class TestSetValueItemSlice3(TestSetValueApi):
    def _call_setitem(self, x):
        x[0:-1, 0:2] = self.value

    def _get_answer(self):
        self.data[0:-1, 0:2] = self.value


class TestSetValueItemSlice4(TestSetValueApi):
    def _call_setitem(self, x):
        x[0:, 1:2, :] = self.value

    def _get_answer(self):
        self.data[0:, 1:2, :] = self.value


# TODO(qili93): Fix this after NPU support while_loop
# class TestSetValueItemSliceInWhile(TestSetValueApi):
#     def _call_setitem(self, x):
#         def cond(i, x):
#             return i < 1

#         def body(i, x):
#             x[i] = self.value
#             i = i + 1
#             return i, x

#         i = paddle.zeros(shape=(1, ), dtype='int32')
#         i, x = paddle.fluid.layers.while_loop(cond, body, [i, x])

#     def _get_answer(self):
#         self.data[0] = self.value


# 1.2.2 step > 1
class TestSetValueItemSliceStep(TestSetValueApi):
    def set_shape(self):
        self.shape = [5, 5, 5]

    def _call_setitem(self, x):
        x[0:2:2] = self.value

    def _get_answer(self):
        self.data[0:2:2] = self.value


class TestSetValueItemSliceStep2(TestSetValueApi):
    def set_shape(self):
        self.shape = [7, 5, 5]

    def _call_setitem(self, x):
        x[0:-1:3] = self.value

    def _get_answer(self):
        self.data[0:-1:3] = self.value


class TestSetValueItemSliceStep3(TestSetValueApi):
    def _call_setitem(self, x):
        x[0:-1, 0:2, ::2] = self.value

    def _get_answer(self):
        self.data[0:-1, 0:2, ::2] = self.value


class TestSetValueItemSliceStep4(TestSetValueApi):
    def _call_setitem(self, x):
        x[0:, 1:2:2, :] = self.value

    def _get_answer(self):
        self.data[0:, 1:2:2, :] = self.value


# 1.2.3 step < 0
class TestSetValueItemSliceNegetiveStep(TestSetValueApi):
    def set_shape(self):
        self.shape = [5, 2]

    def set_value(self):
        self.value = np.array([3, 4])

    def _call_setitem(self, x):
        x[5:2:-1] = self.value

    def _get_answer(self):
        self.data[5:2:-1] = self.value


class TestSetValueItemSliceNegetiveStep2(TestSetValueApi):
    def set_shape(self):
        self.shape = [5]

    def set_value(self):
        self.value = np.array([3, 4])

    def _call_setitem(self, x):
        x[1::-1] = self.value

    def _get_answer(self):
        self.data[1::-1] = self.value


class TestSetValueItemSliceNegetiveStep3(TestSetValueApi):
    def set_shape(self):
        self.shape = [3]

    def set_value(self):
        self.value = np.array([3, 4, 5])

    def _call_setitem(self, x):
        x[::-1] = self.value

    def _get_answer(self):
        self.data[::-1] = self.value


class TestSetValueItemSliceNegetiveStep4(TestSetValueApi):
    def set_shape(self):
        self.shape = [3, 4, 5]

    def _call_setitem(self, x):
        x[2:0:-1, 0:2, ::-1] = self.value

    def _get_answer(self):
        self.data[2:0:-1, 0:2, ::-1] = self.value


# 1.3 item is Ellipsis


class TestSetValueItemEllipsis1(TestSetValueApi):
    def _call_setitem(self, x):
        x[0:, ..., 1:] = self.value

    def _get_answer(self):
        self.data[0:, ..., 1:] = self.value


class TestSetValueItemEllipsis2(TestSetValueApi):
    def _call_setitem(self, x):
        x[0:, ...] = self.value

    def _get_answer(self):
        self.data[0:, ...] = self.value


class TestSetValueItemEllipsis3(TestSetValueApi):
    def _call_setitem(self, x):
        x[..., 1:] = self.value

    def _get_answer(self):
        self.data[..., 1:] = self.value


class TestSetValueItemEllipsis4(TestSetValueApi):
    def _call_setitem(self, x):
        x[...] = self.value

    def _get_answer(self):
        self.data[...] = self.value


# 1.4 item is Paddle Tensor
class TestSetValueItemTensor(TestSetValueApi):
    def _call_setitem(self, x):
        zero = paddle.full([1], 0, dtype="int32")
        x[zero] = self.value

    def _get_answer(self):
        self.data[0] = self.value


class TestSetValueItemTensor2(TestSetValueApi):
    def _call_setitem(self, x):
        zero = paddle.full([1], 0, dtype="int32")
        two = paddle.full([1], 2, dtype="int64")
        x[zero:two] = self.value

    def _get_answer(self):
        self.data[0:2] = self.value


class TestSetValueItemTensor3(TestSetValueApi):
    def _call_setitem(self, x):
        zero = paddle.full([1], 0, dtype="int32")
        two = paddle.full([1], 2, dtype="int64")
        x[zero:-1, 0:two] = self.value

    def _get_answer(self):
        self.data[0:-1, 0:2] = self.value


class TestSetValueItemTensor4(TestSetValueApi):
    def _call_setitem(self, x):
        zero = paddle.full([1], 0, dtype="int32")
        two = paddle.full([1], 2, dtype="int64")
        x[0:-1, zero:2, 0:6:two] = self.value

    def _get_answer(self):
        self.data[0:-1, 0:2, ::2] = self.value


class TestSetValueItemTensor5(TestSetValueApi):
    def _call_setitem(self, x):
        zero = paddle.full([1], 0, dtype="int32")
        two = paddle.full([1], 2, dtype="int64")
        x[zero:, 1:2:two, :] = self.value

    def _get_answer(self):
        self.data[0:, 1:2:2, :] = self.value


class TestSetValueItemTensor6(TestSetValueApi):
    def set_shape(self):
        self.shape = [3, 4, 5]

    def _call_setitem(self, x):
        minus1 = paddle.full([1], -1, dtype="int32")
        zero = paddle.full([1], 0, dtype="int32")
        x[2:zero:minus1, 0:2, 10:-6:minus1] = self.value

    def _get_answer(self):
        self.data[2:0:-1, 0:2, ::-1] = self.value


# 1.5 item is None
class TestSetValueItemNone1(TestSetValueApi):
    def _call_setitem(self, x):
        x[None] = self.value

    def _get_answer(self):
        self.data[None] = self.value


class TestSetValueItemNone2(TestSetValueApi):
    def _call_setitem(self, x):
        x[0, None, 1] = self.value

    def _get_answer(self):
        self.data[0, None, 1] = self.value


class TestSetValueItemNone3(TestSetValueApi):
    def _call_setitem(self, x):
        x[:, None, None, 1] = self.value

    def _get_answer(self):
        self.data[:, None, None, 1] = self.value


class TestSetValueItemNone4(TestSetValueApi):
    def _call_setitem(self, x):
        x[0, 0, None, 1] = self.value

    def _get_answer(self):
        self.data[0, 0, None, 1] = self.value


class TestSetValueItemNone5(TestSetValueApi):
    def _call_setitem(self, x):
        x[0, None, 0, None, 1] = self.value

    def _get_answer(self):
        self.data[0, None, 0, None, 1] = self.value


class TestSetValueItemNone6(TestSetValueApi):
    def _call_setitem(self, x):
        x[None, 0, 0, None, 0] = self.value

    def _get_answer(self):
        self.data[None, 0, 0, None, 0] = self.value


class TestSetValueItemNone7(TestSetValueApi):
    def _call_setitem(self, x):
        x[:, None, 1] = np.zeros(self.shape)[:, None, 0]

    def _get_answer(self):
        self.data[:, None, 1] = np.zeros(self.shape)[:, None, 0]


class TestSetValueItemNone8(TestSetValueApi):
    def _call_setitem(self, x):
        x[:, 1, None] = np.zeros(self.shape)[:, 0, None]

    def _get_answer(self):
        self.data[:, 1, None] = np.zeros(self.shape)[:, 0, None]


class TestSetValueItemNone9(TestSetValueApi):
    def _call_setitem(self, x):
        x[None, :, 1, ..., None] = np.zeros(self.shape)[0, 0, :, None]

    def _get_answer(self):
        self.data[None, :, 1, ..., None] = np.zeros(self.shape)[0, 0, :, None]


# 1.5 item is list or Tensor of bol
class TestSetValueItemBool1(TestSetValueApi):
    def _call_setitem(self, x):
        x[[True, False]] = self.value

    def _get_answer(self):
        self.data[[True, False]] = self.value


class TestSetValueItemBool2(TestSetValueApi):
    def _call_setitem(self, x):
        x[[False, False]] = self.value

    def _get_answer(self):
        self.data[[False, False]] = self.value


class TestSetValueItemBool3(TestSetValueApi):
    def _call_setitem(self, x):
        x[[False, True]] = np.zeros(self.shape[2])

    def _get_answer(self):
        self.data[[False, True]] = np.zeros(self.shape[2])


class TestSetValueItemBool4(TestSetValueApi):
    def _call_setitem(self, x):
        idx = paddle.assign(np.array([False, True]))
        x[idx] = np.zeros(self.shape[2])

    def _get_answer(self):
        self.data[np.array([False, True])] = np.zeros(self.shape[2])


class TestSetValueItemBool5(TestSetValueApi):
    def _call_setitem(self, x):
        idx = paddle.assign(
            np.array([[False, True, False], [True, True, False]]))
        x[idx] = self.value

    def _get_answer(self):
        self.data[np.array([[False, True, False], [True, True, False]
                            ])] = self.value


class TestSetValueItemBool6(TestSetValueApi):
    def _call_setitem(self, x):
        x[0, ...] = 0
        x[x > 0] = self.value

    def _get_answer(self):
        self.data[0, ...] = 0
        self.data[self.data > 0] = self.value


def create_test_value_int32(parent):
    class TestValueInt(parent):
        def set_value(self):
            self.value = 7

        def set_dtype(self):
            self.dtype = "int32"

    cls_name = "{0}_{1}".format(parent.__name__, "ValueInt32")
    TestValueInt.__name__ = cls_name
    globals()[cls_name] = TestValueInt


create_test_value_int32(TestSetValueItemInt)
create_test_value_int32(TestSetValueItemSlice)
create_test_value_int32(TestSetValueItemSlice2)
create_test_value_int32(TestSetValueItemSlice3)
create_test_value_int32(TestSetValueItemSlice4)


def create_test_value_int64(parent):
    class TestValueInt(parent):
        def set_value(self):
            self.value = 7

        def set_dtype(self):
            self.dtype = "int64"

    cls_name = "{0}_{1}".format(parent.__name__, "ValueInt64")
    TestValueInt.__name__ = cls_name
    globals()[cls_name] = TestValueInt


create_test_value_int64(TestSetValueItemInt)
create_test_value_int64(TestSetValueItemSlice)
create_test_value_int64(TestSetValueItemSlice2)
create_test_value_int64(TestSetValueItemSlice3)
create_test_value_int64(TestSetValueItemSlice4)


def create_test_value_tensor_fp32(parent):
    class TestValueInt(parent):
        def set_dtype(self):
            self.dtype = "float32"

        def _call_setitem(self, x):
            value = paddle.full(shape=[1], fill_value=3, dtype=self.dtype)
            x[0, 1] = value

        def _get_answer(self):
            self.data[0, 1] = 3

    cls_name = "{0}_{1}".format(parent.__name__, "ValueTensorFp32")
    TestValueInt.__name__ = cls_name
    globals()[cls_name] = TestValueInt


create_test_value_tensor_fp32(TestSetValueItemInt)
create_test_value_tensor_fp32(TestSetValueItemSlice)
create_test_value_tensor_fp32(TestSetValueItemSlice2)
create_test_value_tensor_fp32(TestSetValueItemSlice3)
create_test_value_tensor_fp32(TestSetValueItemSlice4)


# 3. Test different shape of value
class TestSetValueValueShape1(TestSetValueApi):
    def set_value(self):
        self.value = np.array([3, 4, 5, 6])  # shape is (4,)

    def _call_setitem(self, x):
        x[0] = self.value

    def _get_answer(self):
        self.data[0] = self.value


class TestSetValueValueShape2(TestSetValueApi):
    def set_value(self):
        self.value = np.array([[3, 4, 5, 6]])  # shape is (1,4)

    def _call_setitem(self, x):
        x[0:1] = self.value

    def _get_answer(self):
        self.data[0:1] = self.value


class TestSetValueValueShape3(TestSetValueApi):
    def set_value(self):
        self.value = np.array(
            [[1, 1, 1, 1], [2, 2, 2, 2], [3, 3, 3, 3]])  # shape is (3,4)

    def _call_setitem(self, x):
        x[0] = self.value

    def _get_answer(self):
        self.data[0] = self.value


class TestSetValueValueShape4(TestSetValueApi):
    def set_value(self):
        self.value = np.array(
            [[1, 1, 1, 1], [2, 2, 2, 2], [3, 3, 3, 3]]).astype(
                self.dtype)  # shape is (3,4)

    def _call_setitem(self, x):
        x[0] = paddle.assign(self.value)  # x is Paddle.Tensor

    def _get_answer(self):
        self.data[0] = self.value


class TestSetValueValueShape5(TestSetValueApi):
    def set_value(self):
        self.value = np.array([3, 3, 3]).astype(self.dtype)

    def set_shape(self):
        self.shape = [3, 4]

    def _call_setitem(self, x):
        x[:, 0] = paddle.assign(self.value)  # x is Paddle.Tensor

    def _get_answer(self):
        self.data[:, 0] = self.value


if __name__ == '__main__':
    unittest.main()
