# Copyright 2019 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""
Helper to find the path to the correct third_party directory
"""

from os import path
import sys
import platform


# Find the root path of the checkout.
# In the Chromium repository, this is the src/chromium directory.
# In the external repository, standalone build, this is the devtools-frontend directory.
# In the external repository, integrated build, this is the src/chromium directory.
def root_path():
    SCRIPTS_PATH = path.dirname(path.abspath(__file__))
    ABS_DEVTOOLS_PATH = path.dirname(SCRIPTS_PATH)
    PARENT_PATH = path.dirname(ABS_DEVTOOLS_PATH)
    # TODO(1011259): remove Chromium repository handling
    if path.basename(PARENT_PATH) == 'renderer':
        # Chromium repository
        return path.dirname(path.dirname(path.dirname(PARENT_PATH)))
    elif path.basename(PARENT_PATH) == 'devtools-frontend':
        # External repository, integrated build
        return path.dirname(path.dirname(PARENT_PATH))
    else:
        # External repository, standalone build
        return ABS_DEVTOOLS_PATH


# This is the third_party path relative to the root of the checkout.
def third_party_path():
    return path.join(root_path(), 'third_party')


# This points to the node binary downloaded as part of the checkout.
def node_path():
    try:
        old_sys_path = sys.path[:]
        sys.path.append(path.join(third_party_path(), 'node'))
        import node
    finally:
        sys.path = old_sys_path
    return node.GetBinaryPath()


def devtools_root_path():
    return path.dirname((path.dirname(path.abspath(__file__))))


def node_modules_path():
    return path.join(devtools_root_path(), 'node_modules')


def esbuild_path():
    return path.join(devtools_root_path(), 'third_party', 'esbuild', 'esbuild')


def license_checker_path():
    return path.join(node_modules_path(), 'license-checker', 'bin',
                     'license-checker')


def package_json_path():
    return path.join(devtools_root_path(), 'package.json')


def downloaded_chrome_binary_path():
    machine = platform.machine().lower()
    arch = 'arm64' if machine in ('arm64', 'aarch64') else 'x64'

    paths = {
        'linux':
        path.join('chrome-linux', 'chrome-linux64', 'chrome'),
        'darwin':
        path.join(
            f'chrome-mac-{arch}',
            f'chrome-mac-{arch}',
            'Google Chrome for Testing.app',
            'Contents',
            'MacOS',
            'Google Chrome for Testing',
        ),
        'win32':
        path.join('chrome-win', 'chrome-win64', 'chrome.exe'),
    }

    current_os = sys.platform
    if current_os.startswith('linux'):
        current_os = 'linux'

    if current_os not in paths:
        raise NotImplementedError(f"OS {current_os} is not supported.")

    return path.join(devtools_root_path(), 'third_party', 'chrome',
                     paths[current_os])