using DataTransfer.Client.Shared;
using Microsoft.AspNetCore.Components;
using Microsoft.JSInterop;

namespace DataTransfer.Client.Services;

/// <summary>Solves the server's proof-of-work bot check in web workers (<c>wwwroot/js/bot-check.js</c> of the server).</summary>
public sealed class BotCheckSolver(IJSRuntime js, NavigationManager navigation)
{
    /// <returns>The solution, or <c>-1</c> if none was found.</returns>
    public async Task<int> SolveAsync(BotCheckChallenge challenge)
    {
        ArgumentNullException.ThrowIfNull(challenge);

        // An absolute URL, so the module resolves relative to the app's base URI under any path base.
        await using var module = await js.InvokeAsync<IJSObjectReference>(
            "import",
            navigation.ToAbsoluteUri("js/bot-check.js").ToString());
        return await module.InvokeAsync<int>("solve", challenge.Salt, challenge.Hash, challenge.MaxNumber);
    }
}