# This file is part of the Trezor project.
#
# Copyright (C) 2012-2019 SatoshiLabs and contributors
#
# This library is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3
# as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the License along with this library.
# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.

import pytest
from mnemonic import Mnemonic

from trezorlib import device, messages
from trezorlib.debuglink import TrezorClientDebugLink as Client

from ...common import generate_entropy

pytestmark = pytest.mark.skip_t2


def reset_device(client: Client, strength):
    # No PIN, no passphrase
    external_entropy = b"zlutoucky kun upel divoke ody" * 2

    ret = client.call_raw(
        messages.ResetDevice(
            display_random=False,
            strength=strength,
            passphrase_protection=False,
            pin_protection=False,
            language="en-US",
            label="test",
        )
    )

    assert isinstance(ret, messages.ButtonRequest)
    client.debug.press_yes()
    ret = client.call_raw(messages.ButtonAck())

    # Provide entropy
    assert isinstance(ret, messages.EntropyRequest)
    internal_entropy = client.debug.state().reset_entropy
    ret = client.call_raw(messages.EntropyAck(entropy=external_entropy))

    # Generate mnemonic locally
    entropy = generate_entropy(strength, internal_entropy, external_entropy)
    expected_mnemonic = Mnemonic("english").to_mnemonic(entropy)

    mnemonic = []
    for _ in range(strength // 32 * 3):
        assert isinstance(ret, messages.ButtonRequest)
        mnemonic.append(client.debug.read_reset_word())
        client.debug.press_yes()
        client.call_raw(messages.ButtonAck())

    mnemonic = " ".join(mnemonic)

    # Compare that device generated proper mnemonic for given entropies
    assert mnemonic == expected_mnemonic

    mnemonic = []
    for _ in range(strength // 32 * 3):
        assert isinstance(ret, messages.ButtonRequest)
        mnemonic.append(client.debug.read_reset_word())
        client.debug.press_yes()
        resp = client.call_raw(messages.ButtonAck())

    assert isinstance(resp, messages.Success)

    mnemonic = " ".join(mnemonic)

    # Compare that second pass printed out the same mnemonic once again
    assert mnemonic == expected_mnemonic

    # Check if device is properly initialized
    resp = client.call_raw(messages.Initialize())
    assert resp.initialized is True
    assert resp.needs_backup is False
    assert resp.pin_protection is False
    assert resp.passphrase_protection is False

    # Do pin & passphrase-protected action, PassphraseRequest should NOT be raised
    resp = client.call_raw(messages.GetAddress())
    assert isinstance(resp, messages.Address)


@pytest.mark.setup_client(uninitialized=True)
def test_reset_device_128(client: Client):
    reset_device(client, 128)


@pytest.mark.setup_client(uninitialized=True)
def test_reset_device_192(client: Client):
    reset_device(client, 192)


@pytest.mark.setup_client(uninitialized=True)
def test_reset_device_256_pin(client: Client):
    external_entropy = b"zlutoucky kun upel divoke ody" * 2
    strength = 256

    ret = client.call_raw(
        messages.ResetDevice(
            display_random=True,
            strength=strength,
            passphrase_protection=True,
            pin_protection=True,
            language="en-US",
            label="test",
        )
    )

    # Do you want ... ?
    assert isinstance(ret, messages.ButtonRequest)
    client.debug.press_yes()
    ret = client.call_raw(messages.ButtonAck())

    # Entropy screen #1
    assert isinstance(ret, messages.ButtonRequest)
    client.debug.press_yes()
    ret = client.call_raw(messages.ButtonAck())

    # Entropy screen #2
    assert isinstance(ret, messages.ButtonRequest)
    client.debug.press_yes()
    ret = client.call_raw(messages.ButtonAck())

    assert isinstance(ret, messages.PinMatrixRequest)

    # Enter PIN for first time
    pin_encoded = client.debug.encode_pin("654")
    ret = client.call_raw(messages.PinMatrixAck(pin=pin_encoded))
    assert isinstance(ret, messages.PinMatrixRequest)

    # Enter PIN for second time
    pin_encoded = client.debug.encode_pin("654")
    ret = client.call_raw(messages.PinMatrixAck(pin=pin_encoded))

    # Provide entropy
    assert isinstance(ret, messages.EntropyRequest)
    internal_entropy = client.debug.state().reset_entropy
    ret = client.call_raw(messages.EntropyAck(entropy=external_entropy))

    # Generate mnemonic locally
    entropy = generate_entropy(strength, internal_entropy, external_entropy)
    expected_mnemonic = Mnemonic("english").to_mnemonic(entropy)

    mnemonic = []
    for _ in range(strength // 32 * 3):
        assert isinstance(ret, messages.ButtonRequest)
        mnemonic.append(client.debug.read_reset_word())
        client.debug.press_yes()
        client.call_raw(messages.ButtonAck())

    mnemonic = " ".join(mnemonic)

    # Compare that device generated proper mnemonic for given entropies
    assert mnemonic == expected_mnemonic

    mnemonic = []
    for _ in range(strength // 32 * 3):
        assert isinstance(ret, messages.ButtonRequest)
        mnemonic.append(client.debug.read_reset_word())
        client.debug.press_yes()
        resp = client.call_raw(messages.ButtonAck())

    assert isinstance(resp, messages.Success)

    mnemonic = " ".join(mnemonic)

    # Compare that second pass printed out the same mnemonic once again
    assert mnemonic == expected_mnemonic

    # Check if device is properly initialized
    resp = client.call_raw(messages.Initialize())
    assert resp.initialized is True
    assert resp.needs_backup is False
    assert resp.pin_protection is True
    assert resp.passphrase_protection is True

    # Do passphrase-protected action, PassphraseRequest should be raised
    resp = client.call_raw(messages.GetAddress())
    assert isinstance(resp, messages.PassphraseRequest)
    client.call_raw(messages.Cancel())


@pytest.mark.setup_client(uninitialized=True)
def test_failed_pin(client: Client):
    # external_entropy = b'zlutoucky kun upel divoke ody' * 2
    strength = 128

    ret = client.call_raw(
        messages.ResetDevice(
            display_random=True,
            strength=strength,
            passphrase_protection=True,
            pin_protection=True,
            language="en-US",
            label="test",
        )
    )

    # Do you want ... ?
    assert isinstance(ret, messages.ButtonRequest)
    client.debug.press_yes()
    ret = client.call_raw(messages.ButtonAck())

    # Entropy screen #1
    assert isinstance(ret, messages.ButtonRequest)
    client.debug.press_yes()
    ret = client.call_raw(messages.ButtonAck())

    # Entropy screen #2
    assert isinstance(ret, messages.ButtonRequest)
    client.debug.press_yes()
    ret = client.call_raw(messages.ButtonAck())

    assert isinstance(ret, messages.PinMatrixRequest)

    # Enter PIN for first time
    pin_encoded = client.debug.encode_pin("1234")
    ret = client.call_raw(messages.PinMatrixAck(pin=pin_encoded))
    assert isinstance(ret, messages.PinMatrixRequest)

    # Enter PIN for second time
    pin_encoded = client.debug.encode_pin("6789")
    ret = client.call_raw(messages.PinMatrixAck(pin=pin_encoded))

    assert isinstance(ret, messages.Failure)


def test_already_initialized(client: Client):
    with pytest.raises(Exception):
        device.reset(client, False, 128, True, True, "label", "en-US")