using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace DataOrganizer
{
    public partial class FileViewer : Form
    {
        private Dictionary<string, DB.Profile> Profiles { get; } = new Dictionary<string, DB.Profile>();
        private Dictionary<string, DB.FolderGroup> FolderGroups { get; } = new Dictionary<string, DB.FolderGroup>();

        public FileViewer()
        {
            InitializeComponent();
            var db = new DB();

            var profiles = db.GetProfiles();

            foreach(var profile in profiles)
            {
                ProfileComboBox.Items.Add(profile.Name);
                Profiles.Add(profile.Name, profile);
            }

            ProfileComboBox.SelectedIndexChanged += ProfileComboBox_SelectedIndexChanged;

            ProfileComboBox.SelectedIndex = 0;
        }

        private void ProfileComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            var profile = Profiles[ProfileComboBox.Text];

            RootFolderComboBox.Items.Clear();
            FolderGroups.Clear();

            if (profile.FolderGroups.Count > 0)
            {
                foreach (var folder in profile.FolderGroups)
                {
                    RootFolderComboBox.Items.Add(folder.Name);
                    FolderGroups.Add(folder.Name, folder);
                }

                RootFolderComboBox.SelectedIndex = 0;
            }

            RootFolderComboBox.Enabled = true;
        }

        private void FolderSelectButton_Click(object sender, EventArgs e)
        {
            var folder = FolderGroups[RootFolderComboBox.Text];
            var db = new DB();

            StatusLabel.Text = $"{db.GetNamingPatternById(folder.PatternId)}";
            StatusStrip.Refresh();
        }

        private void ScanRootFolderButton_Click(object sender, EventArgs e)
        {
            var folder = FolderGroups[RootFolderComboBox.Text];
            var db = new DB();
            var pattern = db.GetNamingPatternById(folder.PatternId);
            var regex = new Regex(pattern);
            PrimaryFilesTreeView.Nodes.Clear();

            var dirs = Directory.EnumerateDirectories(folder.Path);

            foreach (var dir in dirs)
            {
                var dirInfo = new DirectoryInfo(dir);
                PrimaryFilesTreeView.Nodes.Add(CreateNode(dirInfo, pattern));
            }

            foreach(var file in Directory.EnumerateFiles(folder.Path))
            {
                var fileInfo = new FileInfo(file);
                var fileNode = new TreeNode(fileInfo.Name) { Name = fileInfo.FullName };

                if (!regex.IsMatch(fileInfo.Name))
                {
                    fileNode.ForeColor = Color.DarkOrange;
                }

                PrimaryFilesTreeView.Nodes.Add(fileNode);
            }
        }

        private TreeNode CreateNode(DirectoryInfo dir, string pattern)
        {
            var namingViolation = false;
            var node = new TreeNode(dir.Name) { Name = dir.FullName };
            var regex = new Regex(pattern);

            var files = Directory.EnumerateFiles(dir.FullName);

            foreach (var file in files)
            {
                var fileInfo = new FileInfo(file);
                var fileNode = new TreeNode(fileInfo.Name) { Name = fileInfo.FullName };
                //var match = regex.Match(fileInfo.Name);
                //var stringBuilder = new StringBuilder();

                //if (!match.Groups[1].Success)
                //    stringBuilder.Append($"Failed to match {regex.GroupNameFromNumber(1)} ");//match.Groups[0].Name}");
                //if (!match.Groups[2].Success)
                //    stringBuilder.Append($"Failed to match {regex.GroupNameFromNumber(2)} ");

                if (!regex.IsMatch(fileInfo.Name))
                {
                    namingViolation = true;
                    fileNode.ForeColor = Color.DarkOrange;
                }

                node.Nodes.Add(fileNode);
            }

            if (namingViolation) node.ForeColor = Color.DarkOrange;

            var dirs = Directory.EnumerateDirectories(dir.FullName);

            foreach(var folder in dirs)
            {
                var child = CreateNode(new DirectoryInfo(folder), pattern);
                node.ForeColor = child.ForeColor;
                node.Nodes.Add(child);
            }

            return node;
        }

        private struct Folder
        {

        }
    }
}