# Copyright 2021-2022 Google LLC
#
# 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
#
#      https://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.

# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------
import asyncio
import json
import logging
import tempfile
import os

from bumble.keys import JsonKeyStore, PairingKeys


# -----------------------------------------------------------------------------
# Logging
# -----------------------------------------------------------------------------
logger = logging.getLogger(__name__)


# -----------------------------------------------------------------------------
# Tests
# -----------------------------------------------------------------------------

JSON1 = """
        {
            "my_namespace": {
                "14:7D:DA:4E:53:A8/P": {
                    "address_type": 0,
                    "irk": {
                        "authenticated": false,
                        "value": "e7b2543b206e4e46b44f9e51dad22bd1"
                    },
                    "link_key": {
                        "authenticated": false,
                        "value": "0745dd9691e693d9dca740f7d8dfea75"
                    },
                    "ltk": {
                        "authenticated": false,
                        "value": "d1897ee10016eb1a08e4e037fd54c683"
                    }
                }
            }
        }
        """

JSON2 = """
        {
            "my_namespace1": {
            },
            "my_namespace2": {
            }
        }
        """

JSON3 = """
        {
            "my_namespace1": {
            },
            "__DEFAULT__": {
                "14:7D:DA:4E:53:A8/P": {
                    "address_type": 0,
                    "irk": {
                        "authenticated": false,
                        "value": "e7b2543b206e4e46b44f9e51dad22bd1"
                    }
                }
            }
        }
        """


# -----------------------------------------------------------------------------
async def test_basic():
    with tempfile.NamedTemporaryFile(mode="r+", encoding='utf-8') as file:
        keystore = JsonKeyStore('my_namespace', file.name)
        file.write("{}")
        file.flush()

        keys = await keystore.get_all()
        assert len(keys) == 0

        keys = PairingKeys()
        await keystore.update('foo', keys)
        foo = await keystore.get('foo')
        assert foo is not None
        assert foo.ltk is None
        ltk = bytes([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15])
        keys.ltk = PairingKeys.Key(ltk)
        await keystore.update('foo', keys)
        foo = await keystore.get('foo')
        assert foo is not None
        assert foo.ltk is not None
        assert foo.ltk.value == ltk

        file.flush()
        with open(file.name, "r", encoding="utf-8") as json_file:
            json_data = json.load(json_file)
            assert 'my_namespace' in json_data
            assert 'foo' in json_data['my_namespace']
            assert 'ltk' in json_data['my_namespace']['foo']


# -----------------------------------------------------------------------------
async def test_parsing():
    with tempfile.NamedTemporaryFile(mode="w", encoding='utf-8') as file:
        keystore = JsonKeyStore('my_namespace', file.name)
        file.write(JSON1)
        file.flush()

        foo = await keystore.get('14:7D:DA:4E:53:A8/P')
        assert foo is not None
        assert foo.ltk.value == bytes.fromhex('d1897ee10016eb1a08e4e037fd54c683')


# -----------------------------------------------------------------------------
async def test_default_namespace():
    with tempfile.NamedTemporaryFile(mode="w", encoding='utf-8') as file:
        keystore = JsonKeyStore(None, file.name)
        file.write(JSON1)
        file.flush()

        all_keys = await keystore.get_all()
        assert len(all_keys) == 1
        name, keys = all_keys[0]
        assert name == '14:7D:DA:4E:53:A8/P'
        assert keys.irk.value == bytes.fromhex('e7b2543b206e4e46b44f9e51dad22bd1')

    with tempfile.NamedTemporaryFile(mode="w", encoding='utf-8') as file:
        keystore = JsonKeyStore(None, file.name)
        file.write(JSON2)
        file.flush()

        keys = PairingKeys()
        ltk = bytes([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15])
        keys.ltk = PairingKeys.Key(ltk)
        await keystore.update('foo', keys)
        file.flush()
        with open(file.name, "r", encoding="utf-8") as json_file:
            json_data = json.load(json_file)
            assert '__DEFAULT__' in json_data
            assert 'foo' in json_data['__DEFAULT__']
            assert 'ltk' in json_data['__DEFAULT__']['foo']

    with tempfile.NamedTemporaryFile(mode="w", encoding='utf-8') as file:
        keystore = JsonKeyStore(None, file.name)
        file.write(JSON3)
        file.flush()

        all_keys = await keystore.get_all()
        assert len(all_keys) == 1
        name, keys = all_keys[0]
        assert name == '14:7D:DA:4E:53:A8/P'
        assert keys.irk.value == bytes.fromhex('e7b2543b206e4e46b44f9e51dad22bd1')


# -----------------------------------------------------------------------------
async def run_tests():
    await test_basic()
    await test_parsing()
    await test_default_namespace()


# -----------------------------------------------------------------------------
if __name__ == '__main__':
    logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'INFO').upper())
    asyncio.run(run_tests())