using PuppeteerSharp;
using Microsoft.AspNetCore.Mvc.Testing;

namespace BCards.IntegrationTests.Helpers;

public class PuppeteerTestHelper : IAsyncDisposable
{
    private IBrowser? _browser;
    private IPage? _page;
    private readonly string _baseUrl;

    public PuppeteerTestHelper(WebApplicationFactory<Program> factory)
    {
        _baseUrl = factory.Server.BaseAddress?.ToString() ?? "https://localhost:49178";
    }

    public async Task InitializeAsync()
    {
        // Download Chrome if not available
        await new BrowserFetcher().DownloadAsync();

        _browser = await Puppeteer.LaunchAsync(new LaunchOptions
        {
            Headless = true, // Set to false for debugging
            Args = new[] 
            { 
                "--no-sandbox", 
                "--disable-setuid-sandbox",
                "--disable-dev-shm-usage",
                "--disable-web-security",
                "--allow-running-insecure-content",
                "--ignore-certificate-errors"
            }
        });

        _page = await _browser.NewPageAsync();
        
        // Set viewport for consistent testing
        await _page.SetViewportAsync(new ViewPortOptions
        {
            Width = 1920,
            Height = 1080
        });
    }

    public IPage Page => _page ?? throw new InvalidOperationException("PuppeteerTestHelper not initialized. Call InitializeAsync first.");

    public async Task NavigateToAsync(string relativeUrl)
    {
        var fullUrl = new Uri(new Uri(_baseUrl), relativeUrl).ToString();
        await Page.GoToAsync(fullUrl, new NavigationOptions
        {
            WaitUntil = new[] { WaitUntilNavigation.Networkidle0 }
        });
    }

    public async Task<string> GetPageContentAsync()
    {
        return await Page.GetContentAsync();
    }

    public async Task<string> GetPageTitleAsync()
    {
        return await Page.GetTitleAsync();
    }

    public async Task<bool> ElementExistsAsync(string selector)
    {
        try
        {
            await Page.WaitForSelectorAsync(selector, new WaitForSelectorOptions
            {
                Timeout = 5000
            });
            return true;
        }
        catch (WaitTaskTimeoutException)
        {
            return false;
        }
    }

    public async Task ClickAsync(string selector)
    {
        await Page.WaitForSelectorAsync(selector);
        await Page.ClickAsync(selector);
    }

    public async Task TypeAsync(string selector, string text)
    {
        await Page.WaitForSelectorAsync(selector);
        await Page.TypeAsync(selector, text);
    }

    public async Task FillFormAsync(Dictionary<string, string> formData)
    {
        foreach (var kvp in formData)
        {
            await Page.WaitForSelectorAsync(kvp.Key);
            await Page.EvaluateExpressionAsync($"document.querySelector('{kvp.Key}').value = ''");
            await Page.TypeAsync(kvp.Key, kvp.Value);
        }
    }

    public async Task SubmitFormAsync(string formSelector)
    {
        await Page.ClickAsync($"{formSelector} button[type='submit'], {formSelector} input[type='submit']");
    }

    public async Task WaitForNavigationAsync()
    {
        await Page.WaitForNavigationAsync(new NavigationOptions
        {
            WaitUntil = new[] { WaitUntilNavigation.Networkidle0 }
        });
    }

    public async Task WaitForElementAsync(string selector, int timeoutMs = 10000)
    {
        await Page.WaitForSelectorAsync(selector, new WaitForSelectorOptions
        {
            Timeout = timeoutMs
        });
    }

    public async Task<string> GetElementTextAsync(string selector)
    {
        await Page.WaitForSelectorAsync(selector);
        var element = await Page.QuerySelectorAsync(selector);
        var text = await Page.EvaluateFunctionAsync<string>("el => el.textContent", element);
        return text?.Trim() ?? string.Empty;
    }

    public async Task<string> GetElementValueAsync(string selector)
    {
        await Page.WaitForSelectorAsync(selector);
        var element = await Page.QuerySelectorAsync(selector);
        var value = await Page.EvaluateFunctionAsync<string>("el => el.value", element);
        return value ?? string.Empty;
    }

    public async Task<bool> IsElementVisibleAsync(string selector)
    {
        try
        {
            await Page.WaitForSelectorAsync(selector, new WaitForSelectorOptions
            {
                Visible = true,
                Timeout = 2000
            });
            return true;
        }
        catch (WaitTaskTimeoutException)
        {
            return false;
        }
    }

    public async Task TakeScreenshotAsync(string fileName)
    {
        await Page.ScreenshotAsync(fileName);
    }

    public async Task<string> GetCurrentUrlAsync()
    {
        return Page.Url;
    }

    public async Task<List<string>> GetAllElementTextsAsync(string selector)
    {
        var elements = await Page.QuerySelectorAllAsync(selector);
        var texts = new List<string>();
        
        foreach (var element in elements)
        {
            var text = await Page.EvaluateFunctionAsync<string>("el => el.textContent", element);
            texts.Add(text?.Trim() ?? string.Empty);
        }
        
        return texts;
    }

    public async ValueTask DisposeAsync()
    {
        if (_page != null)
        {
            await _page.CloseAsync();
        }
        
        if (_browser != null)
        {
            await _browser.CloseAsync();
        }
    }
}