using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

namespace DD2Switcher {
    public partial class SettingsForm : Form {
        private TabControl tabControl;
        private TabPage windowsTab;
        private TabPage sequenceTab;
        private FlowLayoutPanel windowsPanel;
        private Label sequenceKeybindLabel;
        private TextBox sequenceKeybindTextBox;
        private Label sequenceTimerDelayLabel;
        private NumericUpDown sequenceTimerDelayNumericUpDown;

        public SettingsForm() {
            InitializeComponent();
            LoadIcon();
            RefreshWindowsList();
        }

        private void InitializeComponent() {
            this.tabControl = new System.Windows.Forms.TabControl();
            this.windowsTab = new System.Windows.Forms.TabPage();
            this.windowsPanel = new System.Windows.Forms.FlowLayoutPanel();
            this.sequenceTab = new System.Windows.Forms.TabPage();
            this.sequenceKeybindTextBox = new System.Windows.Forms.TextBox();
            this.sequenceKeybindLabel = new System.Windows.Forms.Label();
            this.sequenceTimerDelayNumericUpDown = new System.Windows.Forms.NumericUpDown();
            this.sequenceTimerDelayLabel = new System.Windows.Forms.Label();
            this.tabControl.SuspendLayout();
            this.windowsTab.SuspendLayout();
            this.sequenceTab.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.sequenceTimerDelayNumericUpDown)).BeginInit();
            this.SuspendLayout();
            //
            // tabControl
            //
            this.tabControl.Controls.Add(this.windowsTab);
            this.tabControl.Controls.Add(this.sequenceTab);
            this.tabControl.Location = new System.Drawing.Point(12, 12);
            this.tabControl.Name = "tabControl";
            this.tabControl.SelectedIndex = 0;
            this.tabControl.Size = new System.Drawing.Size(576, 396);
            this.tabControl.TabIndex = 0;
            //
            // windowsTab
            //
            this.windowsTab.Controls.Add(this.windowsPanel);
            this.windowsTab.Location = new System.Drawing.Point(4, 22);
            this.windowsTab.Name = "windowsTab";
            this.windowsTab.Padding = new System.Windows.Forms.Padding(3);
            this.windowsTab.Size = new System.Drawing.Size(568, 370);
            this.windowsTab.TabIndex = 0;
            this.windowsTab.Text = "Windows";
            this.windowsTab.UseVisualStyleBackColor = true;
            //
            // windowsPanel
            //
            this.windowsPanel.AutoScroll = true;
            this.windowsPanel.BackColor = System.Drawing.Color.White;
            this.windowsPanel.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.windowsPanel.Location = new System.Drawing.Point(6, 6);
            this.windowsPanel.Name = "windowsPanel";
            this.windowsPanel.Padding = new System.Windows.Forms.Padding(10);
            this.windowsPanel.Size = new System.Drawing.Size(556, 358);
            this.windowsPanel.TabIndex = 0;
            //
            // sequenceTab
            //
            this.sequenceTab.Controls.Add(this.sequenceTimerDelayNumericUpDown);
            this.sequenceTab.Controls.Add(this.sequenceTimerDelayLabel);
            this.sequenceTab.Controls.Add(this.sequenceKeybindTextBox);
            this.sequenceTab.Controls.Add(this.sequenceKeybindLabel);
            this.sequenceTab.Location = new System.Drawing.Point(4, 22);
            this.sequenceTab.Name = "sequenceTab";
            this.sequenceTab.Padding = new System.Windows.Forms.Padding(3);
            this.sequenceTab.Size = new System.Drawing.Size(568, 370);
            this.sequenceTab.TabIndex = 1;
            this.sequenceTab.Text = "Sequence";
            this.sequenceTab.UseVisualStyleBackColor = true;
            //
            // sequenceKeybindTextBox
            //
            this.sequenceKeybindTextBox.Location = new System.Drawing.Point(126, 17);
            this.sequenceKeybindTextBox.Name = "sequenceKeybindTextBox";
            this.sequenceKeybindTextBox.Size = new System.Drawing.Size(111, 20);
            this.sequenceKeybindTextBox.TabIndex = 1;
            this.sequenceKeybindTextBox.Text = Program.SequenceKeybind.ToString();
            this.sequenceKeybindTextBox.Leave += new System.EventHandler(this.sequenceKeybindTextBox_Leave);
            //
            // sequenceKeybindLabel
            //
            this.sequenceKeybindLabel.AutoSize = true;
            this.sequenceKeybindLabel.Location = new System.Drawing.Point(20, 20);
            this.sequenceKeybindLabel.Name = "sequenceKeybindLabel";
            this.sequenceKeybindLabel.Size = new System.Drawing.Size(100, 13);
            this.sequenceKeybindLabel.TabIndex = 0;
            this.sequenceKeybindLabel.Text = "Sequence Keybind:";
            //
            // sequenceTimerDelayLabel
            //
            this.sequenceTimerDelayLabel.AutoSize = true;
            this.sequenceTimerDelayLabel.Location = new System.Drawing.Point(20, 50);
            this.sequenceTimerDelayLabel.Name = "sequenceTimerDelayLabel";
            this.sequenceTimerDelayLabel.Size = new System.Drawing.Size(100, 13);
            this.sequenceTimerDelayLabel.TabIndex = 2;
            this.sequenceTimerDelayLabel.Text = "Timer Delay (ms):";
            //
            // sequenceTimerDelayNumericUpDown
            //
            this.sequenceTimerDelayNumericUpDown.Location = new System.Drawing.Point(126, 47);
            this.sequenceTimerDelayNumericUpDown.Name = "sequenceTimerDelayNumericUpDown";
            this.sequenceTimerDelayNumericUpDown.Size = new System.Drawing.Size(111, 20);
            this.sequenceTimerDelayNumericUpDown.TabIndex = 3;
            this.sequenceTimerDelayNumericUpDown.Minimum = 10;
            this.sequenceTimerDelayNumericUpDown.Maximum = 10000;
            this.sequenceTimerDelayNumericUpDown.Value = Program.SequenceTimerDelay;
            this.sequenceTimerDelayNumericUpDown.ValueChanged +=
                new System.EventHandler(this.sequenceTimerDelayNumericUpDown_ValueChanged);
            //
            // SettingsForm
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(600, 420);
            this.Controls.Add(this.tabControl);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
            this.MaximizeBox = false;
            this.MinimizeBox = false;
            this.Name = "SettingsForm";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "DD2Switcher Settings";
            this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.SettingsForm_FormClosing);
            this.tabControl.ResumeLayout(false);
            this.windowsTab.ResumeLayout(false);
            this.sequenceTab.ResumeLayout(false);
            this.sequenceTab.PerformLayout();
            ((System.ComponentModel.ISupportInitialize)(this.sequenceTimerDelayNumericUpDown)).EndInit();
            this.ResumeLayout(false);
        }

        private void closeButton_Click(object sender, EventArgs e) {
            this.Close();
        }

        private void refreshButton_Click(object sender, EventArgs e) {
            RefreshWindowsList();
        }

        private void RefreshWindowsList() {
            windowsPanel.Controls.Clear();

            // Get tracked windows from Program
            var trackedWindows = GetTrackedWindows();

            if (trackedWindows.Count == 0) {
                var noWindowsLabel = new Label();
                noWindowsLabel.Text = "No windows currently tracked";
                noWindowsLabel.AutoSize = true;
                noWindowsLabel.ForeColor = Color.Gray;
                noWindowsLabel.Font = new Font("Segoe UI", 10F);
                windowsPanel.Controls.Add(noWindowsLabel);
                return;
            }

            for (int i = 0; i < trackedWindows.Count; i++) {
                var window = trackedWindows[i];
                if (window == null)
                    continue;

                var windowPanelForm = new WindowPanelForm();
                windowPanelForm.WindowIndex = i;
                windowPanelForm.WindowProcess = window;
                windowPanelForm.IsFirst = (i == Program.FirstIndex);
                windowPanelForm.IsLast = (i == Program.LastIndex);
                windowPanelForm.UpdateDisplay();

                windowPanelForm.PickClicked += (sender, index) => {
                    // If clicking on a window that's already first or last, remove that setting
                    if (index == Program.FirstIndex) {
                        Program.FirstIndex = -1;
                        Console.WriteLine($"Removed first index: {index}");
                    } else if (index == Program.LastIndex) {
                        Program.LastIndex = -1;
                        Console.WriteLine($"Removed last index: {index}");
                    } else if (Program.FirstIndex == -1) {
                        // First pick - set both first and last
                        Program.FirstIndex = index;
                        Program.LastIndex = index;
                        Console.WriteLine($"Set first and last index: {index}");
                    } else if (Program.LastIndex == -1) {
                        // Second pick - set last (must be >= first)
                        if (index >= Program.FirstIndex) {
                            Program.LastIndex = index;
                        } else {
                            Program.LastIndex = Program.FirstIndex;
                            Program.FirstIndex = index;
                        }
                        Console.WriteLine($"Set last index: {Program.LastIndex}");
                    } else {
                        // Subsequent picks - determine which becomes first
                        int distanceToFirst = Math.Abs(index - Program.FirstIndex);
                        int distanceToLast = Math.Abs(index - Program.LastIndex);

                        if (distanceToFirst <= distanceToLast) {
                            // New index is closer to first, so first moves
                            if (index <= Program.LastIndex) {
                                Program.FirstIndex = index;
                            } else {
                                Program.LastIndex = Program.FirstIndex;
                                Program.FirstIndex = index;
                            }
                        } else {
                            // New index is closer to last, so last moves
                            if (index >= Program.FirstIndex) {
                                Program.LastIndex = index;
                            } else {
                                Program.FirstIndex = Program.LastIndex;
                                Program.LastIndex = index;
                            }
                        }
                        Console.WriteLine($"Updated indices: First={Program.FirstIndex}, Last={Program.LastIndex}");
                    }

                    // Ensure last >= first
                    if (Program.LastIndex < Program.FirstIndex) {
                        int tmp = Program.LastIndex;
                        Program.LastIndex = Program.FirstIndex;
                        Program.FirstIndex = tmp;
                    }

                    RefreshWindowsList();
                };
                windowPanelForm.UntrackClicked += (sender, index) => {
                    UntrackWindow(index);
                    RefreshWindowsList();
                };

                windowsPanel.Controls.Add(windowPanelForm);
            }
        }

        private string GetFirstLastText(int index) {
            if (index == Program.FirstIndex && index == Program.LastIndex) {
                return "First & Last";
            } else if (index == Program.FirstIndex) {
                return "First";
            } else if (index == Program.LastIndex) {
                return "Last";
            }
            return "";
        }

        private List<Process> GetTrackedWindows() {
            var windows = Program.GetTrackedWindows();
            return windows.ToList();
        }

        private void UntrackWindow(int index) {
            Program.UntrackWindow(index);
        }

        private void LoadIcon() {
            try {
                this.Icon = new Icon(System.IO.Path.Combine(
                    System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location),
                    "app.ico"));
            } catch {
                // Use default icon if custom icon not found
            }
        }

        private void sequenceKeybindTextBox_Leave(object sender, EventArgs e) {
            Console.WriteLine($"sequenceKeybindTextBox_Leave called with text: {sequenceKeybindTextBox.Text}");
            try {
                KeysConverter converter = new KeysConverter();
                Keys newKey = (Keys)converter.ConvertFromString(sequenceKeybindTextBox.Text);
                Console.WriteLine($"Converted key: {newKey} (code: {(int)newKey})");
                Program.UpdateSequenceHotkey(newKey);
                Console.WriteLine("Keybind updated successfully!");
            } catch (Exception ex) {
                Console.WriteLine($"Error converting key: {ex.Message}");
                sequenceKeybindTextBox.Text = Program.SequenceKeybind.ToString();
            }
        }

        private void sequenceTimerDelayNumericUpDown_ValueChanged(object sender, EventArgs e) {
            Console.WriteLine(
                $"sequenceTimerDelayNumericUpDown_ValueChanged called with value: {sequenceTimerDelayNumericUpDown.Value}");
            try {
                int newDelay = (int)sequenceTimerDelayNumericUpDown.Value;
                Program.SequenceTimerDelay = newDelay;
                Program.SaveSettings();
                Console.WriteLine($"Timer delay updated to: {newDelay}ms");
            } catch (Exception ex) {
                Console.WriteLine($"Error updating timer delay: {ex.Message}");
            }
        }

        private void SettingsForm_FormClosing(object sender, FormClosingEventArgs e) {
            Console.WriteLine("SettingsForm closing - saving keybind");
            try {
                KeysConverter converter = new KeysConverter();
                Keys newKey = (Keys)converter.ConvertFromString(sequenceKeybindTextBox.Text);
                Console.WriteLine($"Saving keybind on close: {newKey}");
                Program.UpdateSequenceHotkey(newKey);
            } catch (Exception ex) {
                Console.WriteLine($"Error saving keybind on close: {ex.Message}");
            }
        }
    }
}