# 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 SessionDebugWrapper as Session
from trezorlib.tools import parse_path

from ...common import EXTERNAL_ENTROPY, generate_entropy

pytestmark = pytest.mark.models("legacy")


def reset_device(session: Session, strength: int):
    debug = session.client.debug
    # No PIN, no passphrase
    ret = session.call_raw(
        messages.ResetDevice(
            strength=strength,
            passphrase_protection=False,
            pin_protection=False,
            label="test",
        )
    )

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

    # Provide entropy
    assert isinstance(ret, messages.EntropyRequest)
    internal_entropy = debug.state().reset_entropy
    ret = session.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(session.debug.read_reset_word())
        session.debug.press_yes()
        session.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(session.debug.read_reset_word())
        debug.press_yes()
        resp = session.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 = session.call_raw(messages.GetFeatures())
    assert resp.initialized is True
    assert resp.backup_availability == messages.BackupAvailability.NotAvailable
    assert resp.pin_protection is False
    assert resp.passphrase_protection is False

    # Do pin & passphrase-protected action, PassphraseRequest should NOT be raised
    resp = session.call_raw(
        messages.GetAddress(address_n=parse_path("m/44'/0'/0'/0/0"))
    )
    assert isinstance(resp, messages.Address)


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


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


@pytest.mark.setup_client(uninitialized=True)
def test_reset_device_256_pin(session: Session):
    debug = session.client.debug
    strength = 256

    ret = session.call_raw(
        messages.ResetDevice(
            strength=strength,
            passphrase_protection=True,
            pin_protection=True,
            label="test",
        )
    )

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

    assert isinstance(ret, messages.PinMatrixRequest)

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

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

    # Provide entropy
    assert isinstance(ret, messages.EntropyRequest)
    internal_entropy = debug.state().reset_entropy
    ret = session.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(debug.read_reset_word())
        debug.press_yes()
        session.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(debug.read_reset_word())
        debug.press_yes()
        resp = session.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 = session.call_raw(messages.GetFeatures())
    assert resp.initialized is True
    assert resp.backup_availability == messages.BackupAvailability.NotAvailable
    assert resp.pin_protection is True
    assert resp.passphrase_protection is True

    # Do passphrase-protected action, PassphraseRequest should be raised
    resp = session.call_raw(
        messages.GetAddress(address_n=parse_path("m/44'/0'/0'/0/0"))
    )
    assert isinstance(resp, messages.PassphraseRequest)
    session.call_raw(messages.Cancel())


@pytest.mark.setup_client(uninitialized=True)
def test_failed_pin(session: Session):
    debug = session.client.debug
    strength = 128

    ret = session.call_raw(
        messages.ResetDevice(
            strength=strength,
            passphrase_protection=True,
            pin_protection=True,
            label="test",
        )
    )

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

    assert isinstance(ret, messages.PinMatrixRequest)

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

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

    assert isinstance(ret, messages.Failure)


def test_already_initialized(session: Session):
    with pytest.raises(Exception):
        device.reset(
            session,
            strength=128,
            passphrase_protection=True,
            pin_protection=True,
            label="label",
        )
