using Avalonia;
using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Media.Imaging;
using Avalonia.Platform.Storage;
using Avalonia.Styling;
using Avalonia.Threading;
using Catalog.Communication.Abstractions;
using Catalog.Communication.Models;
using ImageCatalog;
using Microsoft.Extensions.Logging;
using System;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;

namespace ImageCatalog_2;

public partial class AvaloniaMainWindow : Window
{
    private const string ApiLoginKey = "ApiTest.Login";
    private const string ApiPasswordKey = "ApiTest.Password";

    private readonly DataModel _model;
    private readonly IRaceUploadCommunicationClient _apiClient;
    private readonly ParametriSetup _parametriSetup;
    private readonly ILogger<AvaloniaMainWindow> _logger;
    private bool _isDarkTheme = false;

    public AvaloniaMainWindow(
        DataModel model,
        IRaceUploadCommunicationClient apiClient,
        ParametriSetup parametriSetup,
        ILogger<AvaloniaMainWindow> logger)
    {
        InitializeComponent();
        _model = model;
        _apiClient = apiClient;
        _parametriSetup = parametriSetup;
        _logger = logger;
        DataContext = _model;

        // Provide Avalonia dispatcher so DataModel can marshal UI updates
        _model.UiInvoker = action => Dispatcher.UIThread.Invoke(action);

        // Wire dialog events
        _model.SelectSourceFolderRequested += async (_, _) =>
        {
            var folders = await StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions { Title = "Seleziona cartella sorgente" });
            if (folders.Count > 0) _model.SourcePath = folders[0].Path.LocalPath + Path.DirectorySeparatorChar;
        };

        _model.SelectDestinationFolderRequested += async (_, _) =>
        {
            var folders = await StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions { Title = "Seleziona cartella destinazione" });
            if (folders.Count > 0) _model.DestinationPath = folders[0].Path.LocalPath + Path.DirectorySeparatorChar;
        };

        _model.SelectLogoFileRequested += async (_, _) =>
        {
            var files = await StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
            {
                Title = "Seleziona logo",
                FileTypeFilter = new[] { new FilePickerFileType("Immagini") { Patterns = new[] { "*.jpg", "*.jpeg", "*.png", "*.bmp", "*.gif" } } }
            });
            if (files.Count > 0)
            {
                _model.LogoFile = files[0].Path.LocalPath;
                UpdateLogoPreview(_model.LogoFile);
            }
        };

        _model.SelectModelsFolderRequested += async (_, _) =>
        {
            var folders = await StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions { Title = "Seleziona cartella modelli" });
            if (folders.Count > 0) _model.ModelsFolderPath = folders[0].Path.LocalPath + Path.DirectorySeparatorChar;
        };

        _model.SelectCsvOutputRequested += async (_, _) =>
        {
            var file = await StorageProvider.SaveFilePickerAsync(new FilePickerSaveOptions
            {
                Title = "Salva CSV",
                DefaultExtension = "csv",
                FileTypeChoices = new[] { new FilePickerFileType("CSV") { Patterns = new[] { "*.csv" } } }
            });
            if (file != null) _model.CsvOutputPath = file.Path.LocalPath;
        };

        _model.SaveSettingsRequested += async (_, _) =>
        {
            var file = await StorageProvider.SaveFilePickerAsync(new FilePickerSaveOptions
            {
                Title = "Salva impostazioni",
                DefaultExtension = "xml",
                FileTypeChoices = new[] { new FilePickerFileType("Setup") { Patterns = new[] { "*.xml" } } }
            });
            if (file != null) await _model.SaveSettingsToFileAsync(file.Path.LocalPath);
        };

        _model.LoadSettingsRequested += async (_, _) =>
        {
            var files = await StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
            {
                Title = "Carica impostazioni",
                FileTypeFilter = new[] { new FilePickerFileType("Setup") { Patterns = new[] { "*.xml" } } }
            });
            if (files.Count > 0) await _model.LoadSettingsFromFileAsync(files[0].Path.LocalPath);
        };

        _model.SelectColorRequested += (_, _) =>
        {
            // Color is set by typing hex directly in the TextBox
        };

        _model.SelectTransparentColorRequested += (_, _) =>
        {
            // Color is set by typing hex directly in the TextBox
        };

        _model.PropertyChanged += (_, e) =>
        {
            if (e.PropertyName == nameof(_model.LogoFile))
                UpdateLogoPreview(_model.LogoFile);
        };

        LoadApiTestCredentials();
    }

    private void ToggleTheme_Click(object? sender, RoutedEventArgs e)
    {
        _isDarkTheme = !_isDarkTheme;
        if (Avalonia.Application.Current != null)
            Avalonia.Application.Current.RequestedThemeVariant = _isDarkTheme ? ThemeVariant.Dark : ThemeVariant.Light;
    }

    private void OpenSourceFolder_Click(object? sender, RoutedEventArgs e) => OpenInExplorer(_model.SourcePath);
    private void OpenDestinationFolder_Click(object? sender, RoutedEventArgs e) => OpenInExplorer(_model.DestinationPath);
    private void OpenModelsFolder_Click(object? sender, RoutedEventArgs e) => OpenInExplorer(_model.ModelsFolderPath);
    private void OpenCsvOutputFolder_Click(object? sender, RoutedEventArgs e)
    {
        var dir = Path.GetDirectoryName(_model.CsvOutputPath);
        OpenInExplorer(string.IsNullOrWhiteSpace(dir) ? _model.CsvOutputPath : dir);
    }

    private static void OpenInExplorer(string? path)
    {
        if (string.IsNullOrWhiteSpace(path)) return;
        path = path.Trim().Trim('"');
        try
        {
            if (File.Exists(path))
                System.Diagnostics.Process.Start("explorer.exe", $"/select,\"{path}\"");
            else if (Directory.Exists(path))
                System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo { FileName = path, UseShellExecute = true });
        }
        catch { }
    }

    private void UpdateLogoPreview(string? path)
    {
        var preview = this.FindControl<Avalonia.Controls.Image>("LogoPreview");
        if (preview == null) return;
        if (string.IsNullOrWhiteSpace(path) || !File.Exists(path))
        {
            preview.Source = null;
            return;
        }
        try { preview.Source = new Avalonia.Media.Imaging.Bitmap(path); }
        catch { preview.Source = null; }
    }

    private void LoadApiTestCredentials()
    {
        var loginBox = this.FindControl<Avalonia.Controls.TextBox>("ApiLoginTextBox");
        var passwordBox = this.FindControl<Avalonia.Controls.TextBox>("ApiPasswordTextBox");
        if (loginBox is null || passwordBox is null)
        {
            return;
        }

        loginBox.Text = _parametriSetup.LeggiParametroString(ApiLoginKey);
        passwordBox.Text = _parametriSetup.LeggiParametroString(ApiPasswordKey);
    }

    private void SaveApiTestCredentials()
    {
        var loginBox = this.FindControl<Avalonia.Controls.TextBox>("ApiLoginTextBox");
        var passwordBox = this.FindControl<Avalonia.Controls.TextBox>("ApiPasswordTextBox");
        if (loginBox is null || passwordBox is null)
        {
            return;
        }

        _parametriSetup.AggiornaParametro(ApiLoginKey, loginBox.Text ?? string.Empty);
        _parametriSetup.AggiornaParametro(ApiPasswordKey, passwordBox.Text ?? string.Empty);
        _parametriSetup.SalvaParametriSetup();
    }

    private async void ApiTestLoginAndGetRaces_Click(object? sender, RoutedEventArgs e)
    {
        var loginBox = this.FindControl<Avalonia.Controls.TextBox>("ApiLoginTextBox");
        var passwordBox = this.FindControl<Avalonia.Controls.TextBox>("ApiPasswordTextBox");
        var outputBox = this.FindControl<Avalonia.Controls.TextBox>("ApiOutputTextBox");
        var statusBlock = this.FindControl<TextBlock>("ApiStatusTextBlock");
        var testButton = this.FindControl<Avalonia.Controls.Button>("ApiTestButton");

        if (loginBox is null || passwordBox is null || outputBox is null || statusBlock is null || testButton is null)
        {
            return;
        }

        var login = loginBox.Text?.Trim() ?? string.Empty;
        var password = passwordBox.Text ?? string.Empty;
        if (string.IsNullOrWhiteSpace(login) || string.IsNullOrWhiteSpace(password))
        {
            statusBlock.Text = "Inserisci login e password.";
            return;
        }

        testButton.IsEnabled = false;
        statusBlock.Text = "Esecuzione test...";
        outputBox.Text = string.Empty;

        try
        {
            _logger.LogDebug("Starting API test request from Avalonia tab for user '{User}'.", login);
            SaveApiTestCredentials();

            var loginResponse = await _apiClient.LoginAdminAsync(
                new AdminLoginRequest
                {
                    Login = login,
                    Password = password,
                    Command = "check",
                },
                CancellationToken.None);

            var searchResponse = await _apiClient.ExecuteGaraCommandAsync(
                new Dictionary<string, string?>
                {
                    ["cmd"] = "search",
                    ["pageNumber"] = "1",
                },
                CancellationToken.None);

            _logger.LogDebug(
                "API test completed requests. LoginStatus={LoginStatusCode}, SearchStatus={SearchStatusCode}",
                (int)loginResponse.StatusCode,
                (int)searchResponse.StatusCode);

            var extracted = ExtractTopRaceLines(searchResponse.Body, 3);

            var sb = new StringBuilder();
            sb.AppendLine($"Login HTTP: {(int)loginResponse.StatusCode} {loginResponse.StatusCode}");
            sb.AppendLine($"Search HTTP: {(int)searchResponse.StatusCode} {searchResponse.StatusCode}");
            sb.AppendLine();

            if (extracted.Count > 0)
            {
                sb.AppendLine("Prime 3 righe gare (estrazione semplice):");
                for (var i = 0; i < extracted.Count; i++)
                {
                    sb.AppendLine($"{i + 1}. {extracted[i]}");
                }
            }
            else
            {
                sb.AppendLine("Nessuna riga gara riconosciuta in modo affidabile. Mostro anteprima raw:");
                sb.AppendLine();
                sb.AppendLine(Truncate(CollapseWhitespace(searchResponse.Body), 1500));
            }

            outputBox.Text = sb.ToString();
            statusBlock.Text = "Test completato.";
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "API test failed in Avalonia tab.");
            _logger.LogDebug("API test exception details: {ExceptionDetails}", ex.ToString());
            outputBox.Text = ex.ToString();
            statusBlock.Text = "Errore durante il test.";
        }
        finally
        {
            testButton.IsEnabled = true;
        }
    }

    private static List<string> ExtractTopRaceLines(string html, int take)
    {
        if (string.IsNullOrWhiteSpace(html))
        {
            return new List<string>();
        }

        var rowMatches = Regex.Matches(html, "<tr[^>]*>(.*?)</tr>", RegexOptions.IgnoreCase | RegexOptions.Singleline);
        var lines = new List<string>();

        foreach (Match row in rowMatches)
        {
            var cells = Regex.Matches(row.Groups[1].Value, "<t[dh][^>]*>(.*?)</t[dh]>", RegexOptions.IgnoreCase | RegexOptions.Singleline)
                .Select(m => CollapseWhitespace(WebUtility.HtmlDecode(StripTags(m.Groups[1].Value))))
                .Where(s => !string.IsNullOrWhiteSpace(s))
                .ToArray();

            if (cells.Length < 2)
            {
                continue;
            }

            var joined = string.Join(" | ", cells);
            if (IsHeaderLike(joined))
            {
                continue;
            }

            lines.Add(joined);
            if (lines.Count >= take)
            {
                break;
            }
        }

        if (lines.Count > 0)
        {
            return lines;
        }

        var textRows = Regex.Matches(html, "(?is)<li[^>]*>(.*?)</li>")
            .Select(m => CollapseWhitespace(WebUtility.HtmlDecode(StripTags(m.Groups[1].Value))))
            .Where(s => s.Length > 8)
            .Take(take)
            .ToList();

        return textRows;
    }

    private static bool IsHeaderLike(string text)
    {
        var lower = text.ToLowerInvariant();
        return lower.Contains("descrizione")
            || lower.Contains("data")
            || lower.Contains("stato")
            || lower.Contains("azioni")
            || lower.Contains("cerca");
    }

    private static string StripTags(string value)
    {
        return Regex.Replace(value, "<[^>]+>", " ", RegexOptions.Singleline);
    }

    private static string CollapseWhitespace(string? value)
    {
        if (string.IsNullOrWhiteSpace(value))
        {
            return string.Empty;
        }

        return Regex.Replace(value, "\\s+", " ").Trim();
    }

    private static string Truncate(string value, int max)
    {
        if (value.Length <= max)
        {
            return value;
        }

        return value.Substring(0, max) + "...";
    }
}