using PrintServiceTray.Models;
using PrintServiceTray.Services;

namespace PrintServiceTray.Forms;

public partial class ConfigurationForm : Form
{
    private readonly ConfigurationService _configService;
    private PrinterConfiguration _config;
    private string? _selectedDocType;
    private List<string> _installedPrinters;

    // UI Controls
    private ListBox _docTypeListBox = null!;
    private Button _newDocTypeButton = null!;
    private Button _deleteDocTypeButton = null!;
    private Panel _pageConfigPanel = null!;
    private RadioButton _saveGlobalRadio = null!;
    private RadioButton _saveLocalRadio = null!;
    private Button _saveButton = null!;
    private Button _cancelButton = null!;
    private Button _addPageButton = null!;
    private Button _removePageButton = null!;
    private Label _configLabel = null!;

    private List<PageConfigControl> _pageControls = new();

    public ConfigurationForm()
    {
        _configService = new ConfigurationService();
        _config = _configService.Load();
        _installedPrinters = _configService.GetInstalledPrinters();

        InitializeComponent();
        LoadDocumentTypes();
    }

    private void InitializeComponent()
    {
        Text = "LAAPC Printer Configuration";
        Size = new Size(900, 600);
        StartPosition = FormStartPosition.CenterScreen;
        FormBorderStyle = FormBorderStyle.FixedDialog;
        MaximizeBox = false;

        // Left panel - Document Types
        var leftPanel = new Panel
        {
            Location = new Point(10, 10),
            Size = new Size(250, 540),
            BorderStyle = BorderStyle.FixedSingle
        };

        var docTypeLabel = new Label
        {
            Text = "Document Types:",
            Location = new Point(10, 10),
            Size = new Size(230, 20),
            Font = new Font(Font, FontStyle.Bold)
        };

        _docTypeListBox = new ListBox
        {
            Location = new Point(10, 35),
            Size = new Size(230, 430)
        };
        _docTypeListBox.SelectedIndexChanged += DocTypeListBox_SelectedIndexChanged;

        _newDocTypeButton = new Button
        {
            Text = "New",
            Location = new Point(10, 475),
            Size = new Size(110, 30)
        };
        _newDocTypeButton.Click += NewDocType_Click;

        _deleteDocTypeButton = new Button
        {
            Text = "Delete",
            Location = new Point(130, 475),
            Size = new Size(110, 30)
        };
        _deleteDocTypeButton.Click += DeleteDocType_Click;

        leftPanel.Controls.AddRange(new Control[] {
            docTypeLabel, _docTypeListBox, _newDocTypeButton, _deleteDocTypeButton
        });

        // Right panel - Page Configuration
        var rightPanel = new Panel
        {
            Location = new Point(270, 10),
            Size = new Size(610, 540),
            BorderStyle = BorderStyle.FixedSingle
        };

        _configLabel = new Label
        {
            Text = "Configuration for: (Select a document type)",
            Location = new Point(10, 10),
            Size = new Size(590, 20),
            Font = new Font(Font, FontStyle.Bold)
        };

        var pageConfigLabel = new Label
        {
            Text = "Page Configuration:",
            Location = new Point(10, 40),
            Size = new Size(590, 20)
        };

        _pageConfigPanel = new Panel
        {
            Location = new Point(10, 65),
            Size = new Size(590, 350),
            AutoScroll = true,
            BorderStyle = BorderStyle.FixedSingle
        };

        _addPageButton = new Button
        {
            Text = "+ Add Page",
            Location = new Point(10, 425),
            Size = new Size(120, 30)
        };
        _addPageButton.Click += AddPage_Click;

        _removePageButton = new Button
        {
            Text = "- Remove Last",
            Location = new Point(140, 425),
            Size = new Size(120, 30)
        };
        _removePageButton.Click += RemovePage_Click;

        // Save options
        var saveToLabel = new Label
        {
            Text = "Save to:",
            Location = new Point(10, 465),
            Size = new Size(60, 20)
        };

        _saveGlobalRadio = new RadioButton
        {
            Text = "Global (All Users)",
            Location = new Point(80, 465),
            Size = new Size(150, 20)
        };

        _saveLocalRadio = new RadioButton
        {
            Text = "Local (My Computer)",
            Location = new Point(240, 465),
            Size = new Size(170, 20),
            Checked = true
        };

        _saveButton = new Button
        {
            Text = "Save",
            Location = new Point(430, 495),
            Size = new Size(80, 35)
        };
        _saveButton.Click += Save_Click;

        _cancelButton = new Button
        {
            Text = "Cancel",
            Location = new Point(520, 495),
            Size = new Size(80, 35)
        };
        _cancelButton.Click += (s, e) => Close();

        rightPanel.Controls.AddRange(new Control[] {
            _configLabel, pageConfigLabel, _pageConfigPanel,
            _addPageButton, _removePageButton,
            saveToLabel, _saveGlobalRadio, _saveLocalRadio,
            _saveButton, _cancelButton
        });

        Controls.AddRange(new Control[] { leftPanel, rightPanel });
    }

    private void LoadDocumentTypes()
    {
        _docTypeListBox.Items.Clear();
        foreach (var docType in _config.DocumentTypes.Keys.OrderBy(k => k))
        {
            _docTypeListBox.Items.Add(docType);
        }
    }

    private void DocTypeListBox_SelectedIndexChanged(object? sender, EventArgs e)
    {
        if (_docTypeListBox.SelectedItem is string docType)
        {
            _selectedDocType = docType;
            LoadPageConfiguration(docType);
        }
    }

    private void LoadPageConfiguration(string docType)
    {
        _configLabel.Text = $"Configuration for: {docType}";
        _pageConfigPanel.Controls.Clear();
        _pageControls.Clear();

        if (!_config.DocumentTypes.TryGetValue(docType, out var config))
        {
            config = new DocumentTypeConfig { Name = docType };
            _config.DocumentTypes[docType] = config;
        }

        int yPos = 10;
        foreach (var page in config.Pages.OrderBy(p => p.PageNumber))
        {
            var pageControl = new PageConfigControl(page.PageNumber, _installedPrinters, _configService);
            pageControl.Location = new Point(10, yPos);
            pageControl.LoadPage(page);
            _pageConfigPanel.Controls.Add(pageControl);
            _pageControls.Add(pageControl);
            yPos += pageControl.Height + 10;
        }

        if (config.Pages.Count == 0)
        {
            // Add first page by default
            AddPage_Click(null, EventArgs.Empty);
        }
    }

    private void AddPage_Click(object? sender, EventArgs e)
    {
        if (_selectedDocType == null) return;

        var config = _config.DocumentTypes[_selectedDocType];
        int nextPageNum = config.Pages.Count > 0 ? config.Pages.Max(p => p.PageNumber) + 1 : 1;

        var newPage = new PageConfig
        {
            PageNumber = nextPageNum,
            PrinterName = _installedPrinters.FirstOrDefault() ?? "",
            TrayNumber = 1
        };
        config.Pages.Add(newPage);

        LoadPageConfiguration(_selectedDocType);
    }

    private void RemovePage_Click(object? sender, EventArgs e)
    {
        if (_selectedDocType == null) return;

        var config = _config.DocumentTypes[_selectedDocType];
        if (config.Pages.Count > 0)
        {
            var lastPage = config.Pages.OrderByDescending(p => p.PageNumber).First();
            config.Pages.Remove(lastPage);
            LoadPageConfiguration(_selectedDocType);
        }
    }

    private void NewDocType_Click(object? sender, EventArgs e)
    {
        var dialog = new TextInputDialog("New Document Type", "Enter document type name:");
        if (dialog.ShowDialog() == DialogResult.OK && !string.IsNullOrWhiteSpace(dialog.InputText))
        {
            var docType = dialog.InputText.Trim();
            if (!_config.DocumentTypes.ContainsKey(docType))
            {
                _config.DocumentTypes[docType] = new DocumentTypeConfig { Name = docType };
                LoadDocumentTypes();
                _docTypeListBox.SelectedItem = docType;
            }
            else
            {
                MessageBox.Show($"Document type '{docType}' already exists.", "Duplicate", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
        }
    }

    private void DeleteDocType_Click(object? sender, EventArgs e)
    {
        if (_selectedDocType == null) return;

        var result = MessageBox.Show(
            $"Are you sure you want to delete '{_selectedDocType}'?",
            "Confirm Delete",
            MessageBoxButtons.YesNo,
            MessageBoxIcon.Question);

        if (result == DialogResult.Yes)
        {
            _config.DocumentTypes.Remove(_selectedDocType);
            _selectedDocType = null;
            LoadDocumentTypes();
            _pageConfigPanel.Controls.Clear();
            _configLabel.Text = "Configuration for: (Select a document type)";
        }
    }

    private void Save_Click(object? sender, EventArgs e)
    {
        try
        {
            // Save current page configurations
            if (_selectedDocType != null && _config.DocumentTypes.TryGetValue(_selectedDocType, out var config))
            {
                config.Pages.Clear();
                foreach (var pageControl in _pageControls)
                {
                    config.Pages.Add(pageControl.GetPageConfig());
                }
            }

            bool saveGlobal = _saveGlobalRadio.Checked;
            _configService.Save(_config, saveGlobal);

            MessageBox.Show(
                $"Configuration saved to {(saveGlobal ? "global" : "local")} file successfully!",
                "Success",
                MessageBoxButtons.OK,
                MessageBoxIcon.Information);

            DialogResult = DialogResult.OK;
            Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(
                $"Failed to save configuration: {ex.Message}",
                "Error",
                MessageBoxButtons.OK,
                MessageBoxIcon.Error);
        }
    }
}

// Custom control for each page configuration
public class PageConfigControl : UserControl
{
    private readonly int _pageNumber;
    private readonly List<string> _printers;
    private readonly ConfigurationService _configService;

    private ComboBox _printerCombo = null!;
    private ComboBox _trayCombo = null!;

    public PageConfigControl(int pageNumber, List<string> printers, ConfigurationService configService)
    {
        _pageNumber = pageNumber;
        _printers = printers;
        _configService = configService;

        InitializeComponent();
    }

    private void InitializeComponent()
    {
        Size = new Size(560, 60);
        BorderStyle = BorderStyle.FixedSingle;

        var pageLabel = new Label
        {
            Text = $"Page {_pageNumber}:",
            Location = new Point(10, 10),
            Size = new Size(70, 20),
            Font = new Font(Font, FontStyle.Bold)
        };

        var printerLabel = new Label
        {
            Text = "Printer:",
            Location = new Point(10, 32),
            Size = new Size(60, 20)
        };

        _printerCombo = new ComboBox
        {
            Location = new Point(75, 30),
            Size = new Size(250, 25),
            DropDownStyle = ComboBoxStyle.DropDownList
        };
        _printerCombo.Items.AddRange(_printers.ToArray());
        _printerCombo.SelectedIndexChanged += PrinterCombo_SelectedIndexChanged;

        var trayLabel = new Label
        {
            Text = "Tray:",
            Location = new Point(340, 32),
            Size = new Size(40, 20)
        };

        _trayCombo = new ComboBox
        {
            Location = new Point(385, 30),
            Size = new Size(165, 25),
            DropDownStyle = ComboBoxStyle.DropDownList
        };

        Controls.AddRange(new Control[] {
            pageLabel, printerLabel, _printerCombo, trayLabel, _trayCombo
        });
    }

    public void LoadPage(PageConfig page)
    {
        _printerCombo.SelectedItem = page.PrinterName;
        LoadTrays(page.PrinterName);
        
        // Try to find and select the tray
        for (int i = 0; i < _trayCombo.Items.Count; i++)
        {
            if (_trayCombo.Items[i] is TrayItem item && item.TrayNumber == page.TrayNumber)
            {
                _trayCombo.SelectedIndex = i;
                break;
            }
        }
    }

    private void PrinterCombo_SelectedIndexChanged(object? sender, EventArgs e)
    {
        if (_printerCombo.SelectedItem is string printer)
        {
            LoadTrays(printer);
        }
    }

    private void LoadTrays(string printerName)
    {
        _trayCombo.Items.Clear();
        var trays = _configService.GetPrinterTrays(printerName);
        foreach (var (number, name) in trays)
        {
            _trayCombo.Items.Add(new TrayItem { TrayNumber = number, TrayName = name });
        }
        if (_trayCombo.Items.Count > 0)
        {
            _trayCombo.SelectedIndex = 0;
        }
    }

    public PageConfig GetPageConfig()
    {
        var selectedTray = _trayCombo.SelectedItem as TrayItem;
        return new PageConfig
        {
            PageNumber = _pageNumber,
            PrinterName = _printerCombo.SelectedItem?.ToString() ?? "",
            TrayNumber = selectedTray?.TrayNumber ?? 1,
            TrayLabel = selectedTray?.TrayName
        };
    }

    private class TrayItem
    {
        public int TrayNumber { get; set; }
        public string TrayName { get; set; } = "";

        public override string ToString() => $"Tray {TrayNumber} - {TrayName}";
    }
}

// Simple text input dialog
public class TextInputDialog : Form
{
    private TextBox _textBox = null!;
    public string InputText => _textBox.Text;

    public TextInputDialog(string title, string prompt)
    {
        Text = title;
        Size = new Size(400, 150);
        StartPosition = FormStartPosition.CenterParent;
        FormBorderStyle = FormBorderStyle.FixedDialog;
        MaximizeBox = false;
        MinimizeBox = false;

        var promptLabel = new Label
        {
            Text = prompt,
            Location = new Point(20, 20),
            Size = new Size(360, 20)
        };

        _textBox = new TextBox
        {
            Location = new Point(20, 50),
            Size = new Size(360, 25)
        };

        var okButton = new Button
        {
            Text = "OK",
            DialogResult = DialogResult.OK,
            Location = new Point(220, 85),
            Size = new Size(75, 30)
        };

        var cancelButton = new Button
        {
            Text = "Cancel",
            DialogResult = DialogResult.Cancel,
            Location = new Point(305, 85),
            Size = new Size(75, 30)
        };

        AcceptButton = okButton;
        CancelButton = cancelButton;

        Controls.AddRange(new Control[] { promptLabel, _textBox, okButton, cancelButton });
    }
}