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#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
#     http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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.

import pytest
from pydantic.v1 import ValidationError

from braket.ir.ahs.hamiltonian import Hamiltonian

valid_driving_fields = []
valid_shifting_fields = []


def test_valid():
    hamiltonian_field = Hamiltonian(
        drivingFields=valid_driving_fields, shiftingFields=valid_shifting_fields
    )
    assert hamiltonian_field.drivingFields == valid_driving_fields
    assert hamiltonian_field.localDetuning == valid_shifting_fields
    assert hamiltonian_field.shiftingFields == valid_shifting_fields

    hamiltonian_field = Hamiltonian(
        drivingFields=valid_driving_fields, localDetuning=valid_shifting_fields
    )
    assert hamiltonian_field.drivingFields == valid_driving_fields
    assert hamiltonian_field.shiftingFields == valid_shifting_fields
    assert hamiltonian_field.localDetuning == valid_shifting_fields


def test_get_local_detuning():
    hamiltonian_field = Hamiltonian(
        drivingFields=valid_driving_fields, shiftingFields=valid_shifting_fields
    )
    assert hamiltonian_field.localDetuning == valid_shifting_fields


def test_set():
    hamiltonian_field = Hamiltonian(
        drivingFields=valid_driving_fields, shiftingFields=valid_shifting_fields
    )
    hamiltonian_field.localDetuning = []
    hamiltonian_field.shiftingFields = []


def test_del_shifting_fields():
    hamiltonian_field = Hamiltonian(
        drivingFields=valid_driving_fields, shiftingFields=valid_shifting_fields
    )
    del hamiltonian_field.shiftingFields


def test_del_local_detuning():
    hamiltonian_field = Hamiltonian(
        drivingFields=valid_driving_fields, shiftingFields=valid_shifting_fields
    )
    del hamiltonian_field.localDetuning


@pytest.mark.xfail(raises=ValidationError)
def test__missing_driving_fields():
    Hamiltonian(
        shiftingFields=valid_shifting_fields,
    )


@pytest.mark.xfail(raises=ValidationError)
def test__missing_driving_fields_with_local_detuning():
    Hamiltonian(
        localDetuning=valid_shifting_fields,
    )


@pytest.mark.xfail(raises=ValidationError)
def test__missing_local_detuning():
    Hamiltonian(
        drivingFields=valid_driving_fields,
    )
