// <copyright file="DevToolsVersionInfo.cs" company="Selenium Committers">
// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC licenses this file
// to you 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.
// </copyright>

using System;
using System.Text.Json.Serialization;
using System.Text.RegularExpressions;

namespace OpenQA.Selenium.DevTools;

/// <summary>
/// Provides information about the version of DevTools components being automated.
/// </summary>
public class DevToolsVersionInfo
{
    /// <summary>
    /// Gets or sets the browser name, usually expressed as "Browser/Version" (e.g., "Chrome/86.0.0.1234".
    /// </summary>
    [JsonPropertyName("Browser")]
    [JsonInclude]
    public string? Browser { get; internal set; }

    /// <summary>
    /// Gets the browser version without the preceding browser name.
    /// </summary>
    [JsonIgnore]
    public string BrowserVersion
    {
        get
        {
            if (Browser is null)
            {
                throw new InvalidOperationException("Browser value is null");
            }

            return Regex.Match(Browser, ".*/(.*)").Groups[1].Value;
        }
    }

    /// <summary>
    /// Gets the browser major version number without the preceding browser name.
    /// </summary>
    [JsonIgnore]
    public string BrowserMajorVersion
    {
        get
        {
            if (Browser is null)
            {
                throw new InvalidOperationException("Browser value is null");
            }

            return Regex.Match(Browser, ".*/(\\d+)\\..*").Groups[1].Value;
        }
    }

    /// <summary>
    /// Gets the version of the Developer Tools Protocol.
    /// </summary>
    [JsonPropertyName("Protocol-Version")]
    [JsonInclude]
    public string? ProtocolVersion { get; internal set; }

    /// <summary>
    /// Gets the user agent string.
    /// </summary>
    [JsonPropertyName("User-Agent")]
    [JsonInclude]
    public string? UserAgent { get; internal set; }

    /// <summary>
    /// Gets the version string for the V8 script engine in use by this version of the browser.
    /// </summary>
    [JsonPropertyName("V8-Version")]
    [JsonInclude]
    public string? V8Version { get; internal set; }

    /// <summary>
    /// Gets the URL for the WebSocket connection used for communicating via the DevTools Protocol.
    /// </summary>
    [JsonPropertyName("webSocketDebuggerUrl")]
    [JsonInclude]
    public string? WebSocketDebuggerUrl { get; internal set; }

    /// <summary>
    /// Gets the version number of the V8 script engine, stripping values other than the version number.
    /// </summary>
    [JsonIgnore]
    public string V8VersionNumber
    {
        get
        {
            //Get the v8 version
            Match? v8VersionMatch = V8Version is null ? null : Regex.Match(V8Version, @"^(\d+)\.(\d+)\.(\d+)(\.\d+.*)?");
            if (v8VersionMatch is null || v8VersionMatch.Success == false || v8VersionMatch.Groups.Count < 4)
            {
                throw new InvalidOperationException($"Unable to determine v8 version number from v8 version string ({V8Version})");
            }

            return $"{v8VersionMatch.Groups[1].Value}.{v8VersionMatch.Groups[2].Value}.{v8VersionMatch.Groups[3].Value}";
        }
    }

    /// <summary>
    /// Gets the version string for the version of WebKit used to build this version of the browser.
    /// </summary>
    [JsonPropertyName("WebKit-Version")]
    [JsonInclude]
    public string? WebKitVersion { get; internal set; }

    /// <summary>
    /// Gets the hash of the version of WebKit, stripping values other than the hash.
    /// </summary>
    [JsonIgnore]
    public string WebKitVersionHash
    {
        get
        {
            //Get the webkit version hash.
            var webkitVersionMatch = WebKitVersion is null ? null : Regex.Match(WebKitVersion, @"\s\(@(\b[0-9a-f]{5,40}\b)");
            if (webkitVersionMatch is null || webkitVersionMatch.Success == false || webkitVersionMatch.Groups.Count != 2)
            {
                throw new InvalidOperationException($"Unable to determine webkit version hash from webkit version string ({WebKitVersion})");
            }

            return webkitVersionMatch.Groups[1].Value;
        }
    }
}
