#!/usr/bin/env python3

# Copyright (c) 2023 Project CHIP Authors
#
# 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.

import os
import re
import subprocess
import sys

CHIP_TOPDIR = os.path.dirname(os.path.realpath(__file__))[:-len(os.path.join('src', 'setup_payload', 'tests'))]
sys.path.insert(0, os.path.join(CHIP_TOPDIR, 'src', 'setup_payload', 'python'))
from generate_setup_payload import CommissioningFlow, SetupPayload  # noqa: E402


def payload_param_dict():
    return {
        'Version': None,
        'VendorID': None,
        'ProductID': None,
        'Custom flow': None,
        'Discovery Bitmask': None,
        'Short discriminator': None,
        'Long discriminator': None,
        'Passcode': None
    }


def remove_escape_sequence(data):
    ansi_escape = re.compile(r'\x1B(?:[@-Z\\-_]|\[[0-?]*[ -/]*[@-~])')
    result = ansi_escape.sub('', data)
    return result


def parse_setup_payload(chip_tool, payload):
    cmd_args = [chip_tool, 'payload', 'parse-setup-payload', payload]
    data = subprocess.check_output(cmd_args).decode('utf-8')
    data = remove_escape_sequence(data)
    parsed_params = payload_param_dict()
    for key in parsed_params:
        k_st = data.find(key)
        if k_st == -1:
            continue

        # 1 is for ":"
        k_end = k_st + len(key) + 1

        k_nl = data.find('\n', k_end)
        parsed_params[key] = data[k_end:k_nl].split()[0]

    return parsed_params


def generate_payloads(in_params):
    payloads = SetupPayload(in_params['Long discriminator'], in_params['Passcode'],
                            in_params['Discovery Bitmask'], CommissioningFlow(in_params['Custom flow']),
                            in_params['VendorID'], in_params['ProductID'])
    manualcode = payloads.generate_manualcode()
    qrcode = payloads.generate_qrcode()
    return manualcode, qrcode


def verify_payloads(in_params, manualcode_params, qrcode_params):
    assert in_params['Version'] == int(manualcode_params['Version'], 0)
    assert in_params['Passcode'] == int(manualcode_params['Passcode'], 0)
    assert in_params['Short discriminator'] == int(manualcode_params['Short discriminator'], 0)
    if in_params['Custom flow'] != 0:
        assert in_params['VendorID'] == int(manualcode_params['VendorID'], 0)
        assert in_params['ProductID'] == int(manualcode_params['ProductID'], 0)

    assert in_params['Version'] == int(qrcode_params['Version'], 0)
    assert in_params['VendorID'] == int(qrcode_params['VendorID'], 0)
    assert in_params['ProductID'] == int(qrcode_params['ProductID'], 0)
    assert in_params['Custom flow'] == int(qrcode_params['Custom flow'], 0)
    assert in_params['Discovery Bitmask'] == int(qrcode_params['Discovery Bitmask'], 0)
    assert in_params['Passcode'] == int(qrcode_params['Passcode'], 0)
    assert in_params['Long discriminator'] == int(qrcode_params['Long discriminator'], 0)


def get_payload_params(discriminator, passcode, discovery=4, flow=0, vid=0, pid=0, version=0):
    p = payload_param_dict()
    p['Version'] = version
    p['VendorID'] = vid
    p['ProductID'] = pid
    p['Custom flow'] = flow
    p['Discovery Bitmask'] = discovery
    p['Long discriminator'] = discriminator
    p['Short discriminator'] = discriminator >> 8
    p['Passcode'] = passcode
    return p


def run_tests(chip_tool):
    test_data_set = [
        get_payload_params(3840, 20202021),
        get_payload_params(3781, 12349876, flow=1, vid=1, pid=1),
        get_payload_params(2310, 23005908, flow=2, vid=0xFFF3, pid=0x8098),
        get_payload_params(3091, 43338551, discovery=2, flow=2, vid=0x1123, pid=0x0012),
        get_payload_params(80, 54757432, discovery=6, flow=2, vid=0x2345, pid=0x1023),
        get_payload_params(174, 81235604, discovery=7, flow=1, vid=0x45, pid=0x10),
    ]

    for test_params in test_data_set:
        manualcode, qrcode = generate_payloads(test_params)
        manualcode_params = parse_setup_payload(chip_tool, manualcode)
        qrcode_params = parse_setup_payload(chip_tool, qrcode)

        print("Input parameters:", test_params)
        print("Manualcode:", manualcode)
        print("QRCode:", qrcode)
        print("Manualcode parsed by chip-tool:", manualcode_params)
        print("QRCode parsed by chip-tool:", qrcode_params)
        print("")

        verify_payloads(test_params, manualcode_params, qrcode_params)


def main():
    if len(sys.argv) == 2:
        chip_tool = sys.argv[1]
        run_tests(chip_tool)


if __name__ == '__main__':
    main()