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 = ShowOpenFileDialogForFolder("请选择包含PDF文件夹的路径", 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 = ShowOpenFileDialogForFolder("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 = ShowOpenFileDialogForFolder("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 string ShowOpenFileDialogForFolder(string title, string initialPath)
        {
            using (OpenFileDialog dialog = new OpenFileDialog())
            {
                dialog.Title = title;
                dialog.Filter = "文件夹|*.|所有文件|*.*";
                dialog.FileName = "选择文件夹";
                dialog.CheckFileExists = false;
                dialog.CheckPathExists = true;
                dialog.Multiselect = false;
                dialog.ValidateNames = false;

                // 设置初始目录
                if (!string.IsNullOrEmpty(initialPath) && Directory.Exists(initialPath))
                {
                    dialog.InitialDirectory = initialPath;
                }
                else
                {
                    dialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyComputer);
                }

                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    string selectedPath = Path.GetDirectoryName(dialog.FileName);

                    // 如果用户选择了文件，返回文件所在目录
                    if (!string.IsNullOrEmpty(selectedPath))
                    {
                        return selectedPath;
                    }

                    // 如果用户只选择了目录（这可能在某些情况下发生）
                    if (Directory.Exists(dialog.FileName))
                    {
                        return dialog.FileName;
                    }
                }
            }

            return null;
        }

        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();
        }
    }
}