using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Drawing;
using System.Windows.Forms;

namespace SlideCombine
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            // 设置窗体图标 - 使用嵌入资源
            try
            {
                var stream = GetType().Assembly.GetManifestResourceStream("SlideCombine.app.ico");
                if (stream != null)
                {
                    this.Icon = new Icon(stream);
                }
            }
            catch
            {
                // 如果图标加载失败，使用默认图标
                // this.Icon = SystemIcons.Application;
            }
        }

        private void btnBrowseSource_Click(object sender, EventArgs e)
        {
            string selectedPath = ShowModernFolderBrowser("请选择包含PDF文件夹的路径（含FreePic2Pdf_bkmk.txt文件）", txtSourcePath.Text);
            if (!string.IsNullOrEmpty(selectedPath))
            {
                txtSourcePath.Text = selectedPath;
                LogInfo($"已选择PDF路径: {selectedPath}");
            }
        }

        private void btnBrowseText_Click(object sender, EventArgs e)
        {
            string selectedPath = ShowModernFolderBrowser("请选择包含元数据TXT文件的路径", txtTextPath.Text);
            if (!string.IsNullOrEmpty(selectedPath))
            {
                txtTextPath.Text = selectedPath;
                LogInfo($"已选择TXT源路径: {selectedPath}");
            }
        }

        private void btnBrowseOutput_Click(object sender, EventArgs e)
        {
            string selectedPath = ShowModernFolderBrowser("请选择合并后TXT文件的输出路径", txtOutputPath.Text);
            if (!string.IsNullOrEmpty(selectedPath))
            {
                txtOutputPath.Text = selectedPath;
                LogInfo($"已选择最终输出路径: {selectedPath}");
            }
        }

        private void btnPasteSource_Click(object sender, EventArgs e)
        {
            if (Clipboard.ContainsText())
            {
                var pastedPath = Clipboard.GetText().Trim();
                if (!string.IsNullOrEmpty(pastedPath))
                {
                    txtSourcePath.Text = pastedPath;
                    LogInfo($"已粘贴PDF路径: {pastedPath}");
                }
            }
            else
            {
                MessageBox.Show("剪贴板中没有文本内容", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void btnPasteText_Click(object sender, EventArgs e)
        {
            if (Clipboard.ContainsText())
            {
                var pastedPath = Clipboard.GetText().Trim();
                if (!string.IsNullOrEmpty(pastedPath))
                {
                    txtTextPath.Text = pastedPath;
                    LogInfo($"已粘贴TXT源路径: {pastedPath}");
                }
            }
            else
            {
                MessageBox.Show("剪贴板中没有文本内容", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void btnPasteOutput_Click(object sender, EventArgs e)
        {
            if (Clipboard.ContainsText())
            {
                var pastedPath = Clipboard.GetText().Trim();
                if (!string.IsNullOrEmpty(pastedPath))
                {
                    txtOutputPath.Text = pastedPath;
                    LogInfo($"已粘贴输出路径: {pastedPath}");
                }
            }
            else
            {
                MessageBox.Show("剪贴板中没有文本内容", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void btnClear_Click(object sender, EventArgs e)
        {
            txtSourcePath.Clear();
            txtTextPath.Clear();
            txtOutputPath.Clear();
            txtLog.Clear();
            progressBar.Value = 0;
            LogInfo("界面已清空");
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            LogInfo("程序即将退出");
            Application.Exit();
        }

        private void btnMerge_Click(object sender, EventArgs e)
        {
            try
            {
                // 验证输入
                if (string.IsNullOrWhiteSpace(txtSourcePath.Text) ||
                    string.IsNullOrWhiteSpace(txtTextPath.Text) ||
                    string.IsNullOrWhiteSpace(txtOutputPath.Text))
                {
                    MessageBox.Show("请选择所有三个路径：PDF路径、TXT源路径和输出路径", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    return;
                }

                if (!Directory.Exists(txtSourcePath.Text))
                {
                    MessageBox.Show("指定的PDF文件夹路径不存在", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }

                if (!Directory.Exists(txtTextPath.Text))
                {
                    MessageBox.Show("指定的TXT源文件路径不存在", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }

                // 禁用按钮，防止重复点击
                btnMerge.Enabled = false;
                btnClear.Enabled = false;

                // 重置进度条和日志
                progressBar.Value = 0;
                txtLog.Clear();
                Log("开始处理PDF书签文件...");

                // 处理文件
                var results = FileMerger.ProcessAllFolders(txtSourcePath.Text, txtTextPath.Text, txtOutputPath.Text);

                // 显示进度
                progressBar.Value = 50;
                Log($"找到 {results.Count} 个文件组需要处理");

                // 保存结果
                FileMerger.SaveResults(results, txtOutputPath.Text);

                progressBar.Value = 100;

                // 统计成功和失败的数量
                int successCount = 0;
                int failCount = 0;
                var sb = new StringBuilder();

                foreach (var result in results)
                {
                    if (result.Success)
                    {
                        successCount++;
                        Log($"✓ 成功处理: {result.BaseFileName} (合并了 {result.SourceFiles.Count} 个文件)");
                    }
                    else
                    {
                        failCount++;
                        Log($"✗ 处理失败: {result.ErrorMessage}");
                    }
                }

                Log($"处理完成! 成功: {successCount}, 失败: {failCount}");

                if (successCount > 0)
                {
                    MessageBox.Show($"书签合并完成！\n成功处理 {successCount} 个文件\n输出路径: {txtOutputPath.Text}",
                        "处理完成", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                else
                {
                    MessageBox.Show("没有成功处理任何文件，请检查输入路径和文件格式。",
                        "处理失败", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }
            }
            catch (Exception ex)
            {
                Log($"错误: {ex.Message}");
                MessageBox.Show($"处理过程中发生错误:\n{ex.Message}",
                    "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {
                // 重新启用按钮
                btnMerge.Enabled = true;
                btnClear.Enabled = true;
            }
        }

        private void Log(string msg)
        {
            string timestamp = DateTime.Now.ToString("HH:mm:ss");
            txtLog.AppendText($"[{timestamp}] {msg}\r\n");
            txtLog.ScrollToCaret();
            Application.DoEvents();
        }

        private void LogSuccess(string msg)
        {
            string timestamp = DateTime.Now.ToString("HH:mm:ss");
            txtLog.SelectionStart = txtLog.TextLength;
            txtLog.SelectionColor = Color.Green;
            txtLog.AppendText($"[{timestamp}] ✅ {msg}\r\n");
            txtLog.SelectionColor = txtLog.ForeColor;
            txtLog.ScrollToCaret();
            Application.DoEvents();
        }

        private void LogError(string msg)
        {
            string timestamp = DateTime.Now.ToString("HH:mm:ss");
            txtLog.SelectionStart = txtLog.TextLength;
            txtLog.SelectionColor = Color.Red;
            txtLog.AppendText($"[{timestamp}] ❌ {msg}\r\n");
            txtLog.SelectionColor = txtLog.ForeColor;
            txtLog.ScrollToCaret();
            Application.DoEvents();
        }

        private void LogInfo(string msg)
        {
            string timestamp = DateTime.Now.ToString("HH:mm:ss");
            txtLog.SelectionStart = txtLog.TextLength;
            txtLog.SelectionColor = Color.Blue;
            txtLog.AppendText($"[{timestamp}] ℹ️ {msg}\r\n");
            txtLog.SelectionColor = txtLog.ForeColor;
            txtLog.ScrollToCaret();
            Application.DoEvents();
        }

        private string ShowModernFolderBrowser(string title, string initialPath)
        {
            using (var form = new Form())
            {
                form.Text = title;
                form.Size = new Size(600, 450);
                form.StartPosition = FormStartPosition.CenterParent;
                form.FormBorderStyle = FormBorderStyle.FixedDialog;
                form.MaximizeBox = false;
                form.MinimizeBox = false;
                form.BackColor = Color.White;

                // 标题标签
                var titleLabel = new Label();
                titleLabel.Text = title;
                titleLabel.Location = new Point(20, 20);
                titleLabel.Size = new Size(540, 30);
                titleLabel.Font = new Font("Microsoft YaHei", 11F, FontStyle.Bold);
                titleLabel.ForeColor = Color.FromArgb(51, 51, 51);
                form.Controls.Add(titleLabel);

                // 路径输入框
                var pathTextBox = new TextBox();
                pathTextBox.Location = new Point(20, 60);
                pathTextBox.Size = new Size(460, 30);
                pathTextBox.Font = new Font("Microsoft YaHei", 10F);
                pathTextBox.Text = initialPath ?? string.Empty;
                pathTextBox.BorderStyle = BorderStyle.FixedSingle;
                form.Controls.Add(pathTextBox);

                // 浏览按钮
                var browseButton = new Button();
                browseButton.Text = "浏览";
                browseButton.Location = new Point(490, 60);
                browseButton.Size = new Size(70, 30);
                browseButton.Font = new Font("Microsoft YaHei", 9F);
                browseButton.BackColor = Color.FromArgb(66, 139, 202);
                browseButton.ForeColor = Color.White;
                browseButton.FlatStyle = FlatStyle.Flat;
                browseButton.FlatAppearance.BorderSize = 0;
                form.Controls.Add(browseButton);

                // 文件列表
                var fileList = new ListView();
                fileList.Location = new Point(20, 100);
                fileList.Size = new Size(540, 250);
                fileList.View = View.Details;
                fileList.FullRowSelect = true;
                fileList.GridLines = true;
                fileList.Font = new Font("Microsoft YaHei", 9F);
                fileList.BorderStyle = BorderStyle.FixedSingle;
                fileList.Columns.Add("名称", 300);
                fileList.Columns.Add("修改日期", 140);
                fileList.Columns.Add("类型", 80);
                form.Controls.Add(fileList);

                // 状态标签
                var statusLabel = new Label();
                statusLabel.Text = "当前路径: ";
                statusLabel.Location = new Point(20, 360);
                statusLabel.Size = new Size(540, 20);
                statusLabel.Font = new Font("Microsoft YaHei", 9F);
                statusLabel.ForeColor = Color.FromArgb(102, 102, 102);
                form.Controls.Add(statusLabel);

                // 确定按钮
                var okButton = new Button();
                okButton.Text = "确定";
                okButton.Location = new Point(380, 380);
                okButton.Size = new Size(80, 35);
                okButton.Font = new Font("Microsoft YaHei", 10F, FontStyle.Bold);
                okButton.BackColor = Color.FromArgb(92, 184, 92);
                okButton.ForeColor = Color.White;
                okButton.FlatStyle = FlatStyle.Flat;
                okButton.FlatAppearance.BorderSize = 0;
                form.AcceptButton = okButton;
                form.Controls.Add(okButton);

                // 取消按钮
                var cancelButton = new Button();
                cancelButton.Text = "取消";
                cancelButton.Location = new Point(480, 380);
                cancelButton.Size = new Size(80, 35);
                cancelButton.Font = new Font("Microsoft YaHei", 10F);
                cancelButton.BackColor = Color.FromArgb(217, 83, 79);
                cancelButton.ForeColor = Color.White;
                cancelButton.FlatStyle = FlatStyle.Flat;
                cancelButton.FlatAppearance.BorderSize = 0;
                cancelButton.CancelButton = cancelButton;
                form.Controls.Add(cancelButton);

                // 当前路径
                string currentPath = string.IsNullOrEmpty(initialPath) ?
                    Environment.GetFolderPath(Environment.SpecialFolder.Desktop) : initialPath;

                // 加载文件夹内容的方法
                void LoadFolderContent(string path)
                {
                    try
                    {
                        fileList.Items.Clear();
                        statusLabel.Text = $"当前路径: {path}";

                        if (!string.IsNullOrEmpty(path) && Directory.Exists(path))
                        {
                            // 添加返回上级目录
                            if (Path.GetDirectoryName(path) != null)
                            {
                                var parentItem = new ListViewItem(new[] { "..", "上级目录", "文件夹" });
                                parentItem.Tag = Path.GetDirectoryName(path);
                                parentItem.ForeColor = Color.FromArgb(66, 139, 202);
                                fileList.Items.Add(parentItem);
                            }

                            // 添加子文件夹
                            foreach (var dir in Directory.GetDirectories(path))
                            {
                                var dirInfo = new DirectoryInfo(dir);
                                var item = new ListViewItem(new[]
                                {
                                    dirInfo.Name,
                                    dirInfo.LastWriteTime.ToString("yyyy-MM-dd HH:mm"),
                                    "文件夹"
                                });
                                item.Tag = dirInfo.FullName;
                                item.ForeColor = Color.FromArgb(51, 51, 51);
                                fileList.Items.Add(item);
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show($"无法访问该路径: {ex.Message}", "错误",
                            MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    }
                }

                // 浏览按钮点击事件
                browseButton.Click += (s, e) =>
                {
                    using (var dialog = new FolderBrowserDialog())
                    {
                        dialog.Description = title;
                        if (!string.IsNullOrEmpty(currentPath))
                        {
                            dialog.SelectedPath = currentPath;
                        }

                        if (dialog.ShowDialog() == DialogResult.OK)
                        {
                            currentPath = dialog.SelectedPath;
                            pathTextBox.Text = currentPath;
                            LoadFolderContent(currentPath);
                        }
                    }
                };

                // 文件列表双击事件
                fileList.DoubleClick += (s, e) =>
                {
                    if (fileList.SelectedItems.Count > 0)
                    {
                        var selectedItem = fileList.SelectedItems[0];
                        if (selectedItem.Tag is string selectedPath && Directory.Exists(selectedPath))
                        {
                            currentPath = selectedPath;
                            pathTextBox.Text = currentPath;
                            LoadFolderContent(currentPath);
                        }
                    }
                };

                // 确定按钮点击事件
                okButton.Click += (s, e) =>
                {
                    if (Directory.Exists(pathTextBox.Text))
                    {
                        form.DialogResult = DialogResult.OK;
                        form.Close();
                    }
                    else
                    {
                        MessageBox.Show("请输入有效的文件夹路径", "提示",
                            MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    }
                };

                // 取消按钮点击事件
                cancelButton.Click += (s, e) =>
                {
                    form.DialogResult = DialogResult.Cancel;
                    form.Close();
                };

                // 初始加载
                LoadFolderContent(currentPath);

                // 显示对话框
                if (form.ShowDialog() == DialogResult.OK)
                {
                    return pathTextBox.Text;
                }
            }

            return null;
        }
    }
}