// <copyright file="V136JavaScript.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 OpenQA.Selenium.DevTools.V136.Page;
using OpenQA.Selenium.DevTools.V136.Runtime;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace OpenQA.Selenium.DevTools.V136;

/// <summary>
/// Class containing the JavaScript implementation for version 136 of the DevTools Protocol.
/// </summary>
public class V136JavaScript : JavaScript
{
    private readonly RuntimeAdapter runtime;
    private readonly PageAdapter page;

    /// <summary>
    /// Initializes a new instance of the <see cref="V136JavaScript"/> class.
    /// </summary>
    /// <param name="runtime">The DevTools Protocol adapter for the Runtime domain.</param>
    /// <param name="page">The DevTools Protocol adapter for the Page domain.</param>
    /// <exception cref="ArgumentNullException">If <paramref name="runtime"/> or <paramref name="page"/> are <see langword="null"/>.</exception>
    public V136JavaScript(RuntimeAdapter runtime, PageAdapter page)
    {
        this.runtime = runtime ?? throw new ArgumentNullException(nameof(runtime));
        this.page = page ?? throw new ArgumentNullException(nameof(page));
        this.runtime.BindingCalled += OnRuntimeBindingCalled;
        this.runtime.ConsoleAPICalled += OnRuntimeConsoleApiCalled;
        this.runtime.ExceptionThrown += OnRuntimeExceptionThrown;
    }

    /// <summary>
    /// Asynchronously enables the Runtime domain in the DevTools Protocol.
    /// </summary>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public override async Task EnableRuntime()
    {
        await runtime.Enable().ConfigureAwait(false);
    }

    /// <summary>
    /// Asynchronously disables the Runtime domain in the DevTools Protocol.
    /// </summary>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public override async Task DisableRuntime()
    {
        await runtime.Disable().ConfigureAwait(false);
    }

    /// <summary>
    /// Asynchronously enables the Page domain in the DevTools Protocol.
    /// </summary>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public override async Task EnablePage()
    {
        await page.Enable(new Page.EnableCommandSettings()).ConfigureAwait(false);
    }

    /// <summary>
    /// Asynchronously disables the Page domain in the DevTools Protocol.
    /// </summary>
    /// <returns>A task that represents the asynchronous operation.</returns>
    public override async Task DisablePage()
    {
        await page.Disable().ConfigureAwait(false);
    }

    /// <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 override async Task AddBinding(string name)
    {
        await runtime.AddBinding(new AddBindingCommandSettings() { Name = name }).ConfigureAwait(false);
    }

    /// <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 override async Task RemoveBinding(string name)
    {
        await runtime.RemoveBinding(new RemoveBindingCommandSettings() { Name = name }).ConfigureAwait(false);
    }

    /// <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 override async Task<string> AddScriptToEvaluateOnNewDocument(string script)
    {
        var result = await page.AddScriptToEvaluateOnNewDocument(new AddScriptToEvaluateOnNewDocumentCommandSettings() { Source = script }).ConfigureAwait(false);
        return result.Identifier;
    }

    /// <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 override async Task RemoveScriptToEvaluateOnNewDocument(string scriptId)
    {
        await page.RemoveScriptToEvaluateOnNewDocument(new RemoveScriptToEvaluateOnNewDocumentCommandSettings() { Identifier = scriptId }).ConfigureAwait(false);
    }

    /// <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 override async Task Evaluate(string script)
    {
        await runtime.Evaluate(new EvaluateCommandSettings { Expression = script }).ConfigureAwait(false);
    }

    private void OnRuntimeBindingCalled(object? sender, Runtime.BindingCalledEventArgs e)
    {
        BindingCalledEventArgs wrapped = new BindingCalledEventArgs
        (
            executionContextId: e.ExecutionContextId,
            name: e.Name,
            payload: e.Payload
        );

        this.OnBindingCalled(wrapped);
    }

    private void OnRuntimeExceptionThrown(object? sender, Runtime.ExceptionThrownEventArgs e)
    {
        // TODO: Collect stack trace elements
        var wrapped = new ExceptionThrownEventArgs
        (
            timestamp: new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddMilliseconds(e.Timestamp),
            message: e.ExceptionDetails.Text
        );

        this.OnExceptionThrown(wrapped);
    }

    private void OnRuntimeConsoleApiCalled(object? sender, ConsoleAPICalledEventArgs e)
    {
        List<ConsoleApiArgument> args = new List<ConsoleApiArgument>(e.Args.Length);
        foreach (var arg in e.Args)
        {
            string? argValue = arg.Value?.ToString();
            args.Add(new ConsoleApiArgument(arg.Type.ToString(), argValue));
        }

        var wrapped = new ConsoleApiCalledEventArgs
        (
            timestamp: new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddMilliseconds(e.Timestamp),
            type: e.Type,
            arguments: args.AsReadOnly()
        );

        this.OnConsoleApiCalled(wrapped);
    }
}
