#!/usr/bin/env python3

# Copyright (C) 2021 Apple Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1.  Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2.  Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# This script generates the file with CSS documentation shown in Web Inspector:
# Source/WebInspectorUI/UserInterface/External/CSSDocumentation/CSSDocumentation.js
#
# The upstream data comes from the VSCode custom data repository:
# https://github.com/microsoft/vscode-custom-data/blob/main/web-data/data/browsers.css-data.json
#
# To overwrite descriptions and other CSS documentation fields obtained from the upstream data, update the file:
# Source/WebInspectorUI/UserInterface/External/CSSDocumentation/CSSDocumentation-overrides.json

import json
import urllib.request
import urllib.error
from pathlib import Path

VSCODE_CSS_DATA_JSON_URL = "https://raw.githubusercontent.com/microsoft/vscode-custom-data/main/web-data/data/browsers.css-data.json"
ROOT_DIR = (Path(__file__).parent / ".." / ".." / "..").resolve()
OUTPUT_DIR = "Source/WebInspectorUI/UserInterface/External/CSSDocumentation"
OUTPUT_FILENAME = "CSSDocumentation.js"
CSS_DATA_OVERRIDES_JSON_PATH = Path(ROOT_DIR, OUTPUT_DIR, "CSSDocumentation-overrides.json").resolve()

try:
    print(f"Downloading: {VSCODE_CSS_DATA_JSON_URL}")
    response = urllib.request.urlopen(VSCODE_CSS_DATA_JSON_URL)
except urllib.error.URLError as err:
    print("Download failed\n{0}".format(err))
    exit()

try:
    print("Parsing")
    data = json.load(response)
except json.JSONDecodeError as err:
    print("Parsing failed\n{0}".format(err))
    exit()

try:
    print("Parsing local JSON with overrides")
    overrides = json.load(open(CSS_DATA_OVERRIDES_JSON_PATH, "r"))
except json.JSONDecodeError as err:
    print("Parsing failed\n{0}".format(err))
    exit()

print("Extracting CSS property data")

properties = {}
for prop in data["properties"]:
    name = prop.get("name")
    prop_override = overrides.get(name, {})
    description = prop_override.get("description") or prop.get("description")
    syntax = prop_override.get("syntax") or prop.get("syntax")
    references = prop_override.get("references") or prop.get("references")
    url = ""

    if (references):
        url = references[0].get("url")

    if (url and not url.startswith("https://developer.mozilla.org")):
        print(f"WARNING: Skipping unexpected MDN reference URL: {url}")
        url = ""

    # Skip properties with unsupported prefixes. Keep in sync with prefix list from WI.CSSManager.canonicalNameForPropertyName().
    if (name.startswith("-") and not name.startswith(("-webkit-", "-khtml-", "-apple-"))):
        continue

    # Skip properties lacking any meaningful content.
    if (not description and not syntax):
        continue

    properties[name] = {}

    if (description):
        properties[name]["description"] = description

    if (syntax):
        properties[name]["syntax"] = syntax

    if (url):
        properties[name]["url"] = url

try:
    file_path = Path(ROOT_DIR, OUTPUT_DIR, OUTPUT_FILENAME).resolve()
    print(f"Writing file: {file_path}")
    file = open(file_path, "w")
    file.write("// DO NOT EDIT THIS FILE. It is automatically generated by the script: Source/WebInspectorUI/Scripts/update-inspector-css-documentation.\n")
    file.write("CSSDocumentation = ")
    file.write(json.dumps(properties, indent=4, sort_keys=True))
    file.write(";\n")
    file.close()
except OSError as err:
    print("Writing failed\n{0}".format(err))
    exit()

print("Success!")