using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Net;
using System.Windows.Forms;

namespace Flyby11
{
    public class FAQHandler
    {
        // Reference to the panel that will display the FAQ
        private readonly Panel _faqPanel;

        // Delegate to update the app's status label (from main form)
        private readonly Action<string> _updateStatus;

        private FlowLayoutPanel _faqContentPanel;

        // List of individual FAQ entry steps (to add one by one)
        private readonly List<Action<FlowLayoutPanel>> _faqSteps = new List<Action<FlowLayoutPanel>>();

        private int _currentFaqStep = 0;

        public FAQHandler(Panel faqPanel, Action<string> updateStatus)
        {
            _faqPanel = faqPanel;
            _updateStatus = updateStatus;
        }

        // Initializes the FAQ view with basic content only
        public void InitializeFAQ()
        {
            _faqPanel.AutoScroll = true;
            _faqPanel.Controls.Clear();

            _faqContentPanel = new FlowLayoutPanel
            {
                Dock = DockStyle.Fill,
                AutoScroll = true,
                Padding = new Padding(10),
                FlowDirection = FlowDirection.TopDown,

                WrapContents = false
            };

            // Add static FAQ content (header, ISO info, etc.)
            AddTitle(_faqContentPanel);
            AddISOFAQ(_faqContentPanel);

            _faqPanel.Controls.Add(_faqContentPanel);


            PrepareOtherFAQSteps();  // Prepare additional entries without adding them yet
            AddNextFAQStep(); // Show second FAQ entry , Donate
        }

        // Adds the next FAQ item from the list
        public void AddNextFAQStep()
        {
            if (_currentFaqStep < _faqSteps.Count)
            {
                _faqSteps[_currentFaqStep](_faqContentPanel);
                _currentFaqStep++;

                // Scroll to the newly added element
                var last = _faqContentPanel.Controls[_faqContentPanel.Controls.Count - 1];
                _faqContentPanel.ScrollControlIntoView(last);
                // Add some space below the last element
                var m =last.Margin;
               last.Margin = new Padding(m.Left, m.Top, m.Right, 20);
            }
            else
            {
                _updateStatus("Well, it looks like I've done all I can here. If you need more help, you might want to reach out to the developer, Belim.");
            }
        }

        // Fill list with FAQ methods – each step adds one block of content
        private void PrepareOtherFAQSteps()
        {
            _faqSteps.Clear();
            _currentFaqStep = 0;

            _faqSteps.Add(AddFaq2);
            _faqSteps.Add(AddFaq3);
            _faqSteps.Add(AddFaq4);
            _faqSteps.Add(AddFaq5);
            _faqSteps.Add(AddFaq6);
            _faqSteps.Add(AddFaq7);
        }

        // Adds the title section
        private void AddTitle(FlowLayoutPanel parent)
        {
            AddLabel(parent, Locales.Strings.faq_header, new Font("Segoe UI Variable Display", 10.5f, FontStyle.Bold), DockStyle.Top, ContentAlignment.MiddleCenter, 11);
        }

        // Adds the ISO download information (Q1/A1)
        private void AddISOFAQ(FlowLayoutPanel parent)
        {
            AddLabel(parent, Locales.Strings.faq_q1, new Font("Segoe UI Variable Display", 10.5f, FontStyle.Bold), ContentAlignment.TopLeft, 11);
            AddLabel(parent, Locales.Strings.faq_a1, new Font("Segoe UI Variable Display", 11), ContentAlignment.TopLeft, 11);

            // Links below the answer
            var linkPanel = new FlowLayoutPanel
            {
                AutoSize = true,
                FlowDirection = FlowDirection.LeftToRight,
                WrapContents = true
            };

            AddFAQItem(linkPanel, Locales.Strings.faq_downloadMS, "https://www.microsoft.com/software-download/windows11");
            AddFAQItemWithScript(linkPanel, Locales.Strings.faq_downloadFido, "or", "https://raw.githubusercontent.com/pbatard/Fido/refs/heads/master/Fido.ps1");

            parent.Controls.Add(linkPanel);
        }


        // Simple link-only FAQ entry
        private void AddFAQItem(FlowLayoutPanel parent, string linkText, string linkUrl)
        {
            var linkLabel = new LinkLabel
            {
                Text = linkText,
                Font = new Font("Segoe UI Variable Display", 10.5f, FontStyle.Underline),
                LinkColor = Color.Blue,
                AutoSize = true,
                Padding = new Padding(10),
                TextAlign = ContentAlignment.TopLeft,
                UseCompatibleTextRendering = true
            };

            linkLabel.LinkClicked += (sender, e) => Process.Start(linkUrl);
            parent.Controls.Add(linkLabel);
        }

        // Adds a downloadable script link (e.g., Fido.ps1)
        private void AddFAQItemWithScript(FlowLayoutPanel parent, string linkText, string description, string scriptUrl)
        {
            AddLabel(parent, description, new Font("Segoe UI Variable Display", 9), ContentAlignment.TopLeft, 11);

            var linkLabel = new LinkLabel
            {
                Text = linkText,
                Font = new Font("Segoe UI Variable Display", 10.5f, FontStyle.Underline),
                LinkColor = Color.Blue,
                AutoSize = true,
                Padding = new Padding(10),
                TextAlign = ContentAlignment.TopLeft,
                UseCompatibleTextRendering = true
            };

            linkLabel.Click += (sender, e) =>
            {
                string tempScriptPath = Path.Combine(Path.GetTempPath(), "Fido.ps1");

                try
                {
                    using (var client = new WebClient())
                    {
                        // Download script to temp folder
                        client.DownloadFile(new Uri(scriptUrl), tempScriptPath);
                        _updateStatus("Fido downloaded successfully! Now running the script...");

                        // Run script using elevated PowerShell
                        Process.Start(new ProcessStartInfo
                        {
                            FileName = "powershell.exe",
                            Arguments = $"-ExecutionPolicy Bypass -File \"{tempScriptPath}\"",
                            Verb = "runas",
                            CreateNoWindow = true,
                            UseShellExecute = true
                        });
                    }
                }
                catch (Exception ex)
                {
                    _updateStatus("Error downloading or running the script: " + ex.Message);
                }
            };

            parent.Controls.Add(linkLabel);
        }

        // Adds any generic label to the flow panel
        private void AddLabel(FlowLayoutPanel parent, string text, Font font, ContentAlignment alignment, int padding = 0)
        {
            var label = new Label
            {
                Text = text,
                Font = font,
                Padding = new Padding(padding),
                TextAlign = alignment,
                AutoSize = true,
                UseCompatibleTextRendering = true
            };
            parent.Controls.Add(label);
        }

        // Overload for labels with DockStyle
        private void AddLabel(FlowLayoutPanel parent, string text, Font font, DockStyle dock, ContentAlignment alignment, int padding = 0)
        {
            var label = new Label
            {
                Text = text,
                Font = font,
                Padding = new Padding(padding),
                Dock = dock,
                TextAlign = alignment,
                AutoSize = true,
                UseCompatibleTextRendering = true,
            };
            parent.Controls.Add(label);
        }

        // Adds FAQ entry with question + answer + link
        private void AddFAQItem(FlowLayoutPanel parent, string question, string answer, string linkText, string linkUrl)
        {
            AddLabel(parent, question, new Font("Segoe UI Variable Display", 10.5f, FontStyle.Bold), ContentAlignment.TopLeft, 11);
            AddLabel(parent, answer, new Font("Segoe UI Variable Display", 11), ContentAlignment.TopLeft, 11);

            var linkLabel = new LinkLabel
            {
                Text = linkText,
                Font = new Font("Segoe UI Variable Display", 10.5f, FontStyle.Underline),
                LinkColor = Color.Blue,
                AutoSize = true,
                Padding = new Padding(10),
                TextAlign = ContentAlignment.TopLeft,
                UseCompatibleTextRendering = true,
            };

            linkLabel.LinkClicked += (sender, e) => Process.Start(linkUrl);
            parent.Controls.Add(linkLabel);
        }

        // -- Individual FAQ entries --

        private void AddFaq2(FlowLayoutPanel panel)
        {
            AddFAQItem(panel, Locales.Strings.faq_q2, Locales.Strings.faq_a2, Locales.Strings.faq_a2Link, "https://www.paypal.com/donate?hosted_button_id=MY7HX4QLYR4KG");
        }

        private void AddFaq3(FlowLayoutPanel panel)
        {
            AddLabel(panel, Locales.Strings.faq_q3, new Font("Segoe UI Variable Display", 10.5f, FontStyle.Bold), ContentAlignment.TopLeft, 11);
            AddLabel(panel, Locales.Strings.faq_a3, new Font("Segoe UI Variable Display", 11), ContentAlignment.TopLeft, 11);
        }

        private void AddFaq4(FlowLayoutPanel panel)
        {
            AddLabel(panel, Locales.Strings.faq_q4, new Font("Segoe UI Variable Display", 10.5f, FontStyle.Bold), ContentAlignment.TopLeft, 11);
            AddLabel(panel, Locales.Strings.faq_a4, new Font("Segoe UI Variable Display", 11), ContentAlignment.TopLeft, 11);
        }

        private void AddFaq5(FlowLayoutPanel panel)
        {
            AddLabel(panel, Locales.Strings.faq_q5, new Font("Segoe UI Variable Display", 10.5f, FontStyle.Bold), ContentAlignment.TopLeft, 11);
            AddLabel(panel, Locales.Strings.faq_a5, new Font("Segoe UI Variable Display", 11), ContentAlignment.TopLeft, 11);
        }

        private void AddFaq6(FlowLayoutPanel panel)
        {
            AddLabel(panel, Locales.Strings.faq_q6, new Font("Segoe UI Variable Display", 10.5f, FontStyle.Bold), ContentAlignment.TopLeft, 11);
            AddLabel(panel, Locales.Strings.faq_a6, new Font("Segoe UI Variable Display", 11), ContentAlignment.TopLeft, 11);
        }

        private void AddFaq7(FlowLayoutPanel panel)
        {
            AddFAQItem(panel, Locales.Strings.faq_q7, Locales.Strings.faq_a7, Locales.Strings.faq_a7Link, "https://github.com/BuiltByBel");
        }
    }
}