# Copyright 2020 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import os
import sys


def CheckChangeOnUpload(input_api, output_api):
    return _CommonChecks(input_api, output_api)


def CheckChangeOnCommit(input_api, output_api):
    return _CommonChecks(input_api, output_api)


BASE_DIRECTORY = 'ash/webui/camera_app_ui/'
STRING_RESOURCE_FILES = [
    os.path.join(BASE_DIRECTORY, f) for f in [
        'resources.h',
        'resources/js/i18n_string.ts',
        'resources/strings/camera_strings.grd',
    ]
]


def _CommonChecks(input_api, output_api):
    results = []
    affected = input_api.AffectedFiles()
    if any(f for f in affected if f.LocalPath().endswith('.html')):
        results += _CheckHtml(input_api, output_api)
    if any(f for f in affected if f.LocalPath() in STRING_RESOURCE_FILES):
        results += _CheckStringResouce(input_api, output_api)
    if any(f for f in affected if f.LocalPath().endswith('.css')
           or f.LocalPath().endswith('.svg')):
        results += _CheckColorTokens(input_api, output_api)
    if any(f for f in affected if f.LocalPath().endswith('metrics.ts')):
        results += _CheckModifyMetrics(input_api, output_api)

    return results


def _CheckHtml(input_api, output_api):
    return input_api.canned_checks.CheckLongLines(
        input_api, output_api, 80, lambda x: x.LocalPath().endswith('.html'))


def _CheckStringResouce(input_api, output_api):
    rv = input_api.subprocess.call([
        input_api.python3_executable, './resources/utils/cca.py',
        'check-strings'
    ])

    if rv:
        return [
            output_api.PresubmitPromptWarning(
                'String resources check failed, ' +
                'please make sure the relevant string files are all modified.')
        ]

    return []


def _CheckColorTokens(input_api, output_api):
    rv = input_api.subprocess.call([
        input_api.python3_executable, './resources/utils/cca.py',
        'check-color-tokens'
    ])

    if rv:
        return [
            output_api.PresubmitPromptWarning(
                'Color token check failed, ' +
                'please only use new dynamic color tokens in new CSS rules.')
        ]

    return []


def _CheckModifyMetrics(input_api, output_api):
    if input_api.no_diffs or input_api.change.METRICS_DOCUMENTATION_UPDATED:
        return []
    return [
        output_api.PresubmitPromptWarning(
            'Metrics are modified but `METRICS_DOCUMENTATION_UPDATED=true` is '
            + 'not found in the commit messages.\n' +
            'The CL author should confirm CCA metrics are still synced in ' +
            'PDD (go/cca-metrics-pdd) and Schema (go/cca-metrics-schema).\n' +
            'Once done, the CL author should explicitly claim it by including '
            + '`METRICS_DOCUMENTATION_UPDATED=true` in the commit messages.')
    ]