using System;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Ookii.Dialogs.Wpf;

using NonaBGS.Journal;
using NonaBGS.BGS;
using NonaBGS.Util;

namespace NonaBGS {
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window {
        private PlayerJournal journal = null;
        private Report report = new Report();
        private Config config = new Config();
        private EDDB eddb = null;

        public Config Config => config;

        public Report Report => report;

        public MainWindow() {
            InitializeComponent();

            try {
                config.LoadGlobal();
            } catch (Exception) {
                /* ignored */
            }

            report.OnLog += Report_OnLog;

            eddb = new EDDB(config.ConfigPath);
            journal = new PlayerJournal(config.Global.JournalLocation);

            // Set both to now
            startdate.SelectedDate = DateTime.Now;
            enddate.SelectedDate = DateTime.Now;
            journallocation.Text = Config.Global.JournalLocation;
            useeddb.IsChecked = Config.Global.UseEDDB;

            try {
                config.LoadObjectives(Report);
                RefreshObjectives();

                SyncDatabases();
            } catch (Exception) {
                /* ignored */
            }
        }

        private void Report_OnLog(string message) {
            StringBuilder builder = new StringBuilder();

            builder.Append(DateTime.Now.ToString());
            builder.Append(": ");
            builder.Append(message);
            builder.Append("\n");

            log.AppendText(builder.ToString());
        }

        private void SyncDatabases() {
            if (!config.Global.UseEDDB) {
                return;
            }
            
            eddb.Download();
        }

        private void RefreshObjectives() {
            entries.Items.Clear();

            if (report.Objectives == null) {
                return;
            }

            foreach (var obj in report.Objectives) {
                var item_objective = new TreeViewItem {
                    Header = obj.ToString(),
                    Tag = obj
                };

                foreach (var log in obj.LogEntries) {
                    var log_objective = new TreeViewItem {
                        Header = log.ToString(),
                        Tag = log
                    };
                    item_objective.Items.Add(log_objective);
                }

                item_objective.IsExpanded = true;
                entries.Items.Add(item_objective);
            }
        }

        private void ParseJournal_Click(object sender, RoutedEventArgs e) {
            journal.Open(); // Load all files

            var start = startdate.SelectedDate ?? DateTime.Now;
            var end = startdate.SelectedDate ?? DateTime.Now;

            report.Scan(journal, start, end);

            RefreshObjectives();
        }

        private void AddObjective() {
            Objective objective = new Objective {
                System = system.Text,
                Faction = faction.Text,
                Station = station.Text
            };

            if (!objective.IsValid) {
                return;
            }

            if (report.AddObjective(objective)) {
                RefreshObjectives();
                config.SaveObjectives(Report);
            }
        }

        private void AddFilter_Click(object sender, RoutedEventArgs e) {
            AddObjective();
        }

        private void GenerateDiscord_Click(object sender, RoutedEventArgs e) {
            NonaDiscordLog discord = new NonaDiscordLog();
            string report = discord.GenerateDiscordLog(Report);

            DiscordLog.Text = report;
        }

        private void RemoveCurrentObjective() {
            if (entries.SelectedItem == null) {
                return;
            }

            TreeViewItem item = entries.SelectedItem as TreeViewItem;
            var obj = item.Tag;
            bool removed = false;

            if (obj.GetType() == typeof(Objective)) {
                removed = report.Objectives.Remove(obj as Objective);
            } else if (obj.GetType() == typeof(LogEntry) ||
                obj.GetType().IsSubclassOf(typeof(LogEntry))) {
                var parent = (item.Parent as TreeViewItem).Tag as Objective;
                removed = parent.LogEntries.Remove(obj as LogEntry);
            }

            if (removed) {
                RefreshObjectives();
                config.SaveObjectives(Report);
            }
        }

        private void entries_KeyUp(object sender, KeyEventArgs e) {
            if (e.Key == Key.Delete) {
                RemoveCurrentObjective();
            }
        }

        private void browsejournallocation_Click(object sender, RoutedEventArgs e) {
            var dialog = new VistaFolderBrowserDialog();

            if ((bool)!dialog.ShowDialog()) {
                return;
            }

            Config.Global.JournalLocation = dialog.SelectedPath;
            journallocation.Text = Config.Global.JournalLocation;
            journal = new PlayerJournal(config.Global.JournalLocation);
        }

        private void useeddb_Click(object sender, RoutedEventArgs e) {
            Config.Global.UseEDDB = (bool)useeddb.IsChecked;
            SyncDatabases();
        }

        private void Filter_KeyDown(object sender, KeyEventArgs e) {
            if (e.Key == Key.Enter) {
                AddObjective();
            }
        }
    }
}