using System;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Text.Json;
using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Controls;

namespace QuikDawEditor;

public partial class ViewJsonWindow : Window, INotifyPropertyChanged
{

    public event PropertyChangedEventHandler PropertyChanged;
    private void NotifyPropertyChanged([CallerMemberName] String propertyName = "") { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } }


    public string _JsonText;
    public string JsonText { 
        get { return _JsonText; } 
        set 
        {
            int firstLinePoint = value.IndexOf(Environment.NewLine);
            //string beatsPerMinute = Double.Parse(value.Substring(0, firstLinePoint));
            JsonDocument jdoc = JsonDocument.Parse(value.Substring(firstLinePoint));
            _JsonText = JsonSerializer.Serialize(jdoc, new JsonSerializerOptions { WriteIndented = true });
            NotifyPropertyChanged(nameof(JsonText));  
        }
    }

    public ViewJsonWindow(string jsonText)
    {
        InitializeComponent();
        JsonText = jsonText;
    }

    MatchCollection trackMatches;
    MatchCollection clipMatches;
    bool addingClips = false;


    private void GoToTrackCB_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        if (GoToTrackCB.SelectedIndex == -1) return;

        int trackTextStart = trackMatches[GoToTrackCB.SelectedIndex].Index;
        asdfTB.Select(trackTextStart, 10);
        asdfTB.ScrollToLine(asdfTB.GetLineIndexFromCharacterIndex(trackTextStart) - 2);
        asdfTB.Focus();

        int trackTextEnd = GoToTrackCB.SelectedIndex == GoToTrackCB.Items.Count - 1 ? JsonText.Length : trackMatches[GoToTrackCB.SelectedIndex + 1].Index;
        string trackText = JsonText.Substring(trackMatches[GoToTrackCB.SelectedIndex].Index, trackTextEnd - trackTextStart);
        clipMatches = Regex.Matches(trackText, "\"ClipSourceFileName\"");

        addingClips = true;
        GoToClipCB.Items.Clear();
        for (int clipid = 0; clipid < clipMatches.Count; clipid++)
            GoToClipCB.Items.Add("ClipNo " + clipid.ToString());

        addingClips = false;


    }


    private void GoToClipCB_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        if (addingClips) return;

        int selCharIdx = trackMatches[GoToTrackCB.SelectedIndex].Index + clipMatches[GoToClipCB.SelectedIndex].Index;
        asdfTB.Select(selCharIdx, 10);
        asdfTB.ScrollToLine(asdfTB.GetLineIndexFromCharacterIndex(selCharIdx) - 3);
        asdfTB.Focus();

    }

    private void JsonWindow_ContentRendered(object sender, EventArgs e)
    {
        trackMatches = Regex.Matches(JsonText, "\"trackIndex\"");
        for (int trkid = 0; trkid < trackMatches.Count; trkid++)
            GoToTrackCB.Items.Add("TrackNo " + trkid.ToString());
    }
}