using Microsoft.Playwright;

namespace PrismaticSync.Infrastructure;

/// <summary>
/// A headless Chromium session with a realistic desktop fingerprint (UA, viewport, locale,
/// timezone) — matching the original scraper's settings to look like a normal browser.
/// </summary>
public sealed class BrowserSession : IAsyncDisposable
{
    private IPlaywright? _pw;
    private IBrowser? _browser;
    private IBrowserContext? _context;

    public IPage Page { get; private set; } = null!;

    public static async Task<BrowserSession> CreateAsync(bool headed)
    {
        var session = new BrowserSession();
        session._pw = await Playwright.CreateAsync();
        session._browser = await session._pw.Chromium.LaunchAsync(new BrowserTypeLaunchOptions
        {
            Headless = !headed
        });
        session._context = await session._browser.NewContextAsync(new BrowserNewContextOptions
        {
            UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 " +
                        "(KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36",
            ViewportSize = new ViewportSize { Width = 1365, Height = 900 },
            Locale = "en-US",
            TimezoneId = "America/New_York"
        });
        session.Page = await session._context.NewPageAsync();
        return session;
    }

    public async ValueTask DisposeAsync()
    {
        if (_context is not null) await _context.CloseAsync();
        if (_browser is not null) await _browser.CloseAsync();
        _pw?.Dispose();
    }
}