using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Windows.Forms;
using TaikoSoundEditor.Commons.Controls;
using TaikoSoundEditor.Commons.Utils;
using TaikoSoundEditor.Data;

namespace TaikoSoundEditor
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
            //Init button event handlers
            MusicAttributePathSelector.PathChanged += MusicAttributePathSelector_PathChanged;
            MusicOrderPathSelector.PathChanged += MusicOrderPathSelector_PathChanged;
            MusicInfoPathSelector.PathChanged += MusicInfoPathSelector_PathChanged;
            WordListPathSelector.PathChanged += WordListPathSelector_PathChanged;
            DirSelector.PathChanged += DirSelector_PathChanged;

            UseEncryptionBox.Checked = Config.UseEncryption;
            UseEncryptionBox_CheckedChanged(null, null); // update state of the key two text boxes

            //If path is set for the datatable folder, update paths for all the files.
            if (Config.DatatablesPath != "") DirSelector.Path = Config.DatatablesPath;
            

            DatatableKeyBox.Text = Config.DatatableKey;
            FumenKeyBox.Text = Config.FumenKey;

            DatatableDef.Path = Config.DatatableDefPath;

            //Other stuff
            AddedMusicBinding.DataSource = AddedMusic;
            NewSoundsBox.DataSource = AddedMusicBinding;
            TabControl.SelectedIndexChanged += TabControl_SelectedIndexChanged;

            SimpleGenreBox.DataSource = Enum.GetValues(typeof(Genre));
            LoadPreferences();
        }

        private void TabControl_SelectedIndexChanged(object sender, EventArgs e) =>
            Logger.Info($"Commuted to tab {TabControl.SelectedIndex}.{TabControl.Name}");


        #region Editor

        private void LoadMusicInfo(IMusicInfo item)
        {
            Logger.Info($"Showing properties for MusicInfo: {item}");

            if (item == null)
            {
                MusicInfoGrid.SelectedObject = null;
                MusicAttributesGrid.SelectedObject = null;
                MusicOrderGrid.SelectedObject = null;
                WordsGrid.SelectedObject = null;
                WordSubGrid.SelectedObject = null;
                WordDetailGrid.SelectedObject = null;
                return;
            }

            MusicInfoGrid.SelectedObject = item;
            MusicAttributesGrid.SelectedObject = MusicAttributes.GetByUniqueId(item.UniqueId);
            MusicOrderGrid.SelectedObject = MusicOrders.GetByUniqueId(item.UniqueId);
            WordsGrid.SelectedObject = WordList.GetBySong(item.Id);
            WordSubGrid.SelectedObject = WordList.GetBySongSub(item.Id);
            WordDetailGrid.SelectedObject = WordList.GetBySongDetail(item.Id);

            simpleBoxLoading = true;
            SimpleIdBox.Text = item.Id;
            SimpleTitleBox.Text = WordList.GetBySong(item.Id)?.JapaneseText ?? throw new ArgumentNullException($"Title for '{item.Id}' not found in wordlist");
            SimpleSubtitleBox.Text = WordList.GetBySongSub(item.Id)?.JapaneseText ?? throw new ArgumentNullException($"Subtitle for '{item.Id}' not found in wordlist");
            SimpleDetailBox.Text = WordList.GetBySongDetail(item.Id)?.JapaneseText ?? throw new ArgumentNullException($"Detail for '{item.Id}' not found in wordlist");
            SimpleGenreBox.SelectedItem = MusicOrders.GetByUniqueId(item.UniqueId)?.Genre ?? throw new ArgumentNullException($"Music order entry #{item.UniqueId} could not be found");
            SimpleStarEasyBox.Value = item.StarEasy;
            SimpleStarNormalBox.Value = item.StarNormal;
            SimpleStarHardBox.Value = item.StarHard;
            SimpleStarManiaBox.Value = item.StarMania;
            SimpleStarUraBox.Value = item.StarUra;
            SimpleStarUraBox.Enabled = MusicAttributes.GetByUniqueId(item.UniqueId).CanPlayUra;
            simpleBoxLoading = false;
        }

        private void LoadNewSongData(NewSongData item)
        {
            Logger.Info($"Selection Changed NewSongData: {item}");
            Logger.Info($"Showing properties for NewSongData: {item}");
            MusicInfoGrid.SelectedObject = item?.MusicInfo;
            MusicAttributesGrid.SelectedObject = item?.MusicAttribute;
            MusicOrderGrid.SelectedObject = item?.MusicOrder;
            WordsGrid.SelectedObject = item?.Word;
            WordSubGrid.SelectedObject = item?.WordSub;
            WordDetailGrid.SelectedObject = item?.WordDetail;
            indexChanging = false;

            if (item == null) return;

            simpleBoxLoading = true;
            SimpleIdBox.Text = item.MusicInfo.Id;
            SimpleTitleBox.Text = item.Word.JapaneseText;
            SimpleSubtitleBox.Text = item.WordSub.JapaneseText;
            SimpleDetailBox.Text = item.WordDetail.JapaneseText;
            SimpleGenreBox.SelectedItem = item.MusicOrder.Genre;
            SimpleStarEasyBox.Value = item.MusicInfo.StarEasy;
            SimpleStarNormalBox.Value = item.MusicInfo.StarNormal;
            SimpleStarHardBox.Value = item.MusicInfo.StarHard;
            SimpleStarManiaBox.Value = item.MusicInfo.StarMania;
            SimpleStarUraBox.Value = item.MusicInfo.StarUra;
            SimpleStarUraBox.Enabled = item.MusicAttribute.CanPlayUra;
            simpleBoxLoading = false;
        }

        private bool indexChanging = false;

        private void LoadedMusicBox_SelectedIndexChanged(object sender, EventArgs e) => ExceptionGuard.Run(() =>
        {
            if (indexChanging) return;
            indexChanging = true;
            NewSoundsBox.SelectedItem = null;
            var item = LoadedMusicBox.SelectedItem as IMusicInfo;
            Logger.Info($"Selection Changed MusicItem: {item}");
            LoadMusicInfo(item);
            indexChanging = false;
            SoundViewTab.SelectedTab = SoundViewerSimple;
        });

        private void EditorTable_Resize(object sender, EventArgs e) => ExceptionGuard.Run(() =>
        {
            WordsGB.Height = WordSubGB.Height = WordDetailGB.Height = EditorTable.Height / 3;
        });

        private void NewSoundsBox_SelectedIndexChanged(object sender, EventArgs e) => ExceptionGuard.Run(() =>
        {
            if (indexChanging) return;
            indexChanging = true;
            LoadedMusicBox.SelectedItem = null;
            var item = NewSoundsBox.SelectedItem as NewSongData;
            LoadNewSongData(item);
            SoundViewTab.SelectedTab = SoundViewerSimple;
        });

        #endregion        

        private void RemoveNewSong(NewSongData ns)
        {
            AddedMusic.Remove(ns);
            Logger.Info("Refreshing list");
            AddedMusicBinding.ResetBindings(false);
            MusicOrderViewer.RemoveAllSongs(ns.MusicOrder.UniqueId);

            Logger.Info("Removing from wordlist & music_attributes");
            WordList.Items.Remove(ns.Word);
            WordList.Items.Remove(ns.WordDetail);
            WordList.Items.Remove(ns.WordSub);
            MusicAttributes.Items.Remove(ns.MusicAttribute);
        }

        private void RemoveExistingSong(IMusicInfo mi)
        {
            var ma = MusicAttributes.GetByUniqueId(mi.UniqueId);
            var mo = MusicOrders.GetByUniqueId(mi.UniqueId);
            var w = WordList.GetBySong(mi.Id);
            var ws = WordList.GetBySongSub(mi.Id);
            var wd = WordList.GetBySongDetail(mi.Id);

            Logger.Info("Removing music info");
            MusicInfos.Items.RemoveAll(x => x.UniqueId == mi.UniqueId);
            Logger.Info("Removing music attribute");
            MusicAttributes.Items.Remove(ma);
            Logger.Info("Removing music order");
            MusicOrders.Items.Remove(mo);
            Logger.Info("Removing word");
            WordList.Items.Remove(w);
            Logger.Info("Removing word sub");
            WordList.Items.Remove(ws);
            Logger.Info("Removing word detail");
            WordList.Items.Remove(wd);

            Logger.Info("Refreshing list");
            RefreshExistingSongsListView();

            var sel = LoadedMusicBox.SelectedIndex;

            if (sel >= MusicInfos.Items.Count)
                sel = MusicInfos.Items.Count - 1;

            LoadedMusicBox.SelectedItem = null;
            LoadedMusicBox.SelectedIndex = sel;

            Logger.Info("Removing from music orders");
            MusicOrderViewer.RemoveAllSongs(mo.UniqueId);
        }

        private void RemoveSongButton_Click(object sender, EventArgs e) => ExceptionGuard.Run(() =>
        {
            Logger.Info("Clicked remove song");
            if (NewSoundsBox.SelectedItem != null)
            {
                Logger.Info("Removing newly added song");
                var ns = NewSoundsBox.SelectedItem as NewSongData;
                RemoveNewSong(ns);
                return;
            }

            if (LoadedMusicBox.SelectedItem != null)
            {
                Logger.Info("Removing existing song");
                var mi = LoadedMusicBox.SelectedItem as IMusicInfo;
                RemoveExistingSong(mi);
                return;
            }
        });

        private void SoundViewTab_SelectedIndexChanged(object sender, EventArgs e) => ExceptionGuard.Run(() =>
        {
            if (SoundViewTab.SelectedTab == MusicOrderTab)
            {
                MusicOrderViewer.Invalidate();
                return;
            }

            if (!(SoundViewTab.SelectedTab == SoundViewerExpert || SoundViewTab.SelectedTab == SoundViewerSimple))
                return;

            if (LoadedMusicBox.SelectedItem != null)
            {
                var item = LoadedMusicBox.SelectedItem as IMusicInfo;
                Logger.Info($"Tab switched, reloading MusicItem: {item}");
                LoadMusicInfo(item);
                return;
            }

            if (NewSoundsBox.SelectedItem != null)
            {
                var item = NewSoundsBox.SelectedItem as NewSongData;
                Logger.Info($"Tab switched, reloading NewSongData: {item}");
                LoadNewSongData(item);
                return;
            }
        });

        private bool simpleBoxLoading = false;
        private void SimpleBoxChanged(object sender, EventArgs e) => ExceptionGuard.Run(() =>
        {
            if (simpleBoxLoading) return;

            if (LoadedMusicBox.SelectedItem != null)
            {
                var item = LoadedMusicBox.SelectedItem as IMusicInfo;

                Logger.Info($"Simple Box changed : {(sender as Control).Name} to value {(sender as Control).Text}");


                WordList.GetBySong(item.Id).JapaneseText = SimpleTitleBox.Text;
                WordList.GetBySongSub(item.Id).JapaneseText = SimpleSubtitleBox.Text;
                WordList.GetBySongDetail(item.Id).JapaneseText = SimpleDetailBox.Text;
                MusicOrders.GetByUniqueId(item.UniqueId).Genre = item.Genre = (Genre)(SimpleGenreBox.SelectedItem ?? Genre.Pop);
                item.StarEasy = (int)SimpleStarEasyBox.Value;
                item.StarNormal = (int)SimpleStarNormalBox.Value;
                item.StarHard = (int)SimpleStarHardBox.Value;
                item.StarMania = (int)SimpleStarManiaBox.Value;
                item.StarUra = (int)SimpleStarUraBox.Value;
                return;
            }
            else if (NewSoundsBox.SelectedItem != null)
            {
                var item = NewSoundsBox.SelectedItem as NewSongData;

                Logger.Info($"Simple Box changed : {(sender as Control).Name} to value {(sender as Control).Text}");

                item.Word.JapaneseText = SimpleTitleBox.Text;
                item.WordSub.JapaneseText = SimpleSubtitleBox.Text;
                item.WordDetail.JapaneseText = SimpleDetailBox.Text;
                item.MusicOrder.Genre = item.MusicInfo.Genre = (Genre)(SimpleGenreBox.SelectedItem ?? Genre.Pop);
                item.MusicInfo.StarEasy = (int)SimpleStarEasyBox.Value;
                item.MusicInfo.StarNormal = (int)SimpleStarNormalBox.Value;
                item.MusicInfo.StarHard = (int)SimpleStarHardBox.Value;
                item.MusicInfo.StarMania = (int)SimpleStarManiaBox.Value;
                item.MusicInfo.StarUra = (int)SimpleStarUraBox.Value;
                return;
            }
        });

        private void MusicOrderViewer_SongRemoved(MusicOrderViewer sender, IMusicOrder mo) => ExceptionGuard.Run(() =>
        {
            var uniqId = mo.UniqueId;
            if (MusicOrderViewer.SongExists(uniqId))
                return;

            var mi = MusicInfos.Items.Where(x => x.UniqueId == uniqId).FirstOrDefault();

            if (mi != null)
            {
                RemoveExistingSong(mi);
                return;
            }

            var ns = AddedMusic.Where(x => x.UniqueId == uniqId).FirstOrDefault();
            if (ns != null)
            {
                RemoveNewSong(ns);
                return;
            }
            throw new InvalidOperationException("Nothing to remove.");
        });

        private void LocateInMusicOrderButton_Click(object sender, EventArgs e) => ExceptionGuard.Run(() =>
        {
            if (LoadedMusicBox.SelectedItem != null)
            {
                var item = LoadedMusicBox.SelectedItem as IMusicInfo;
                var mo = MusicOrders.GetByUniqueId(item.UniqueId);
                if (MusicOrderViewer.Locate(mo))
                {
                    SoundViewTab.SelectedTab = MusicOrderTab;
                }
                return;
            }
            else if (NewSoundsBox.SelectedItem != null)
            {
                var item = NewSoundsBox.SelectedItem as NewSongData;
                if (MusicOrderViewer.Locate(item.MusicOrder))
                {
                    SoundViewTab.SelectedTab = MusicOrderTab;
                }
                return;
            }
        });

        private void MusicOrderViewer_SongDoubleClick(MusicOrderViewer sender, IMusicOrder mo)
        {
            var uid = mo.UniqueId;
            var mi = LoadedMusicBox.Items.Cast<IMusicInfo>().Where(_ => _.UniqueId == uid).FirstOrDefault();
            if (mi != null)
            {
                LoadedMusicBox.SelectedItem = mi;
                return;
            }
            var ns = AddedMusic.Where(_ => _.UniqueId == uid).FirstOrDefault();
            if (ns != null)
            {
                NewSoundsBox.SelectedItem = ns;
                return;
            }

        }

        private void SearchBox_TextChanged(object sender, EventArgs e) => RefreshExistingSongsListView();

        private void RefreshExistingSongsListView()
        {
            var list = MusicInfos.Items.Where(mi => mi.UniqueId != 0)
                .Where(mi =>
                {
                    if (string.IsNullOrEmpty(SearchBox.Text))
                        return true;
                    if (int.TryParse(SearchBox.Text, out int uid) && mi.UniqueId == uid)
                    {
                        return true;
                    }
                    return mi.Id.Contains(SearchBox.Text)
                        || WordList.GetBySong(mi.Id).JapaneseText.Contains(SearchBox.Text)
                        || WordList.GetBySongSub(mi.Id).JapaneseText.Contains(SearchBox.Text);
                })
                .ToList();
            LoadedMusicBox.DataSource = list;
            LoadedMusicBinding.ResetBindings(false);
        }

        private void MusicOrderSortToolStripMenuItem_Click(object sender, EventArgs e)
        {
            SortByGenreToolStripMenuItem.Checked = SortByIdToolStripMenuItem.Checked = NoSortToolStripMenuItem.Checked = false;

            if (sender == SortByGenreToolStripMenuItem)
            {
                SortByGenreToolStripMenuItem.Checked = true;
                Config.SetMusicOrderSortByGenre();
            }
            else if (sender == SortByIdToolStripMenuItem)
            {
                SortByIdToolStripMenuItem.Checked = true;
                Config.SetMusicOrderSortById();
            }
            else //if (sender == NoSortToolStripMenuItem)
            {
                NoSortToolStripMenuItem.Checked = true;
                Config.SetMusicOrderNoSort();
            }
        }

        private void LoadPreferences()
        {
            var musicOrderSort = Config.IniFile.Read(Config.MusicOrderSortProperty);
            if (musicOrderSort == Config.MusicOrderSortValueGenre)
            {
                SortByGenreToolStripMenuItem.PerformClick();
            }
            else if (musicOrderSort == Config.MusicOrderSortValueId)
            {
                SortByIdToolStripMenuItem.PerformClick();
            }
            else
            {
                NoSortToolStripMenuItem.PerformClick();
            }
        }

        private void checkForUpdatesToolStripMenuItem_Click(object sender, EventArgs e) => ExceptionGuard.Run(() =>
        {
            //var rel = await Updates.GetLatestTja2Fumen();
        });

        private void DatatableKeyBox_TextChanged(object sender, EventArgs e) => Config.DatatableKey = DatatableKeyBox.Text;

        private void FumenKeyBox_TextChanged(object sender, EventArgs e) => Config.FumenKey = FumenKeyBox.Text;

        private void LoadedMusicBox_DrawItem(object sender, DrawItemEventArgs e)
        {
            e.DrawBackground();
            if (e.Index < 0 || e.Index >= LoadedMusicBox.Items.Count)
                return;
            var selItem = LoadedMusicBox.Items[e.Index] as IMusicInfo;
            TextRenderer.DrawText(e.Graphics, $"{selItem.UniqueId}. {selItem.Id}", Font, e.Bounds, e.ForeColor, e.BackColor, TextFormatFlags.Left | TextFormatFlags.VerticalCenter);
            e.DrawFocusRectangle();
        }

        private void DatatableDef_PathChanged(object sender, EventArgs args)
        {
            try
            {
                var json = File.ReadAllText(DatatableDef.Path);
                DatatableTypes.LoadFromJson(json);
                Config.DatatableDefPath = DatatableDef.Path;
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
            }
        }

        private void UseEncryptionBox_CheckedChanged(object sender, EventArgs e)
        {
            Config.UseEncryption = UseEncryptionBox.Checked;
            FumenKeyBox.Enabled = UseEncryptionBox.Checked;
            DatatableKeyBox.Enabled = UseEncryptionBox.Checked;
        }
    }
}