// <copyright file="JavaScript.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.Threading.Tasks;

namespace OpenQA.Selenium.DevTools;

/// <summary>
/// Class representing the browser's JavaScript execution as referenced by the DevTools Protocol.
/// </summary>
public abstract class JavaScript
{
    /// <summary>
    /// Occurs when a JavaScript script binding is called.
    /// </summary>
    public event EventHandler<BindingCalledEventArgs>? BindingCalled;

    /// <summary>
    /// Occurs when the browser's JavaScript console API is called.
    /// </summary>
    public event EventHandler<ConsoleApiCalledEventArgs>? ConsoleApiCalled;

    /// <summary>
    /// Occurs when a JavaScript exception is thrown.
    /// </summary>
    public event EventHandler<ExceptionThrownEventArgs>? ExceptionThrown;

    /// <summary>
    /// Asynchronously enables the Runtime domain in the DevTools Protocol.
    /// </summary>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public abstract Task EnableRuntime();

    /// <summary>
    /// Asynchronously disables the Runtime domain in the DevTools Protocol.
    /// </summary>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public abstract Task DisableRuntime();

    /// <summary>
    /// Asynchronously enables the Page domain in the DevTools Protocol.
    /// </summary>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public abstract Task EnablePage();

    /// <summary>
    /// Asynchronously disables the Page domain in the DevTools Protocol.
    /// </summary>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public abstract Task DisablePage();

    /// <summary>
    /// Adds a binding to a specific JavaScript name.
    /// </summary>
    /// <param name="name">The name to which to bind to.</param>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public abstract Task AddBinding(string name);

    /// <summary>
    /// Removes a binding from a specific JavaScript name.
    /// </summary>
    /// <param name="name">The name to which to remove the bind from.</param>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public abstract Task RemoveBinding(string name);

    /// <summary>
    /// Adds a JavaScript snippet to evaluate when a new document is opened.
    /// </summary>
    /// <param name="script">The script to add to be evaluated when a new document is opened.</param>
    /// <returns>A task that represents the asynchronous operation. The task result contains the internal ID of the script.</returns>
    public abstract Task<string> AddScriptToEvaluateOnNewDocument(string script);

    /// <summary>
    /// Removes a JavaScript snippet from evaluate when a new document is opened.
    /// </summary>
    /// <param name="scriptId">The ID of the script to be removed.</param>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public abstract Task RemoveScriptToEvaluateOnNewDocument(string scriptId);

    /// <summary>
    /// Evaluates a JavaScript snippet. It does not return a value.
    /// </summary>
    /// <param name="script">The script to evaluate</param>
    /// <returns>A task that represents the asynchronous operation.</returns>
    /// <remarks>
    /// This method is internal to the operation of pinned scripts in Selenium, and
    /// is therefore internal by design.
    /// </remarks>
    internal abstract Task Evaluate(string script);

    /// <summary>
    /// Raises the BindingCalled event.
    /// </summary>
    /// <param name="e">An <see cref="BindingCalledEventArgs"/> that contains the event data.</param>
    protected virtual void OnBindingCalled(BindingCalledEventArgs e)
    {
        if (this.BindingCalled != null)
        {
            this.BindingCalled(this, e);
        }
    }

    /// <summary>
    /// Raises the ConsoleApiCalled event.
    /// </summary>
    /// <param name="e">An <see cref="ConsoleApiCalledEventArgs"/> that contains the event data.</param>
    protected virtual void OnConsoleApiCalled(ConsoleApiCalledEventArgs e)
    {
        if (this.ConsoleApiCalled != null)
        {
            this.ConsoleApiCalled(this, e);
        }
    }

    /// <summary>
    /// Raises the ExceptionThrown event.
    /// </summary>
    /// <param name="e">An <see cref="ExceptionThrownEventArgs"/> that contains the event data.</param>
    protected virtual void OnExceptionThrown(ExceptionThrownEventArgs e)
    {
        if (this.ExceptionThrown != null)
        {
            this.ExceptionThrown(this, e);
        }
    }
}
