package de.danoeh.antennapod.dialog;

import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.fragment.app.DialogFragment;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.google.android.material.chip.Chip;
import com.google.android.material.snackbar.Snackbar;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.core.preferences.UserPreferences;
import de.danoeh.antennapod.core.util.playback.PlaybackController;
import de.danoeh.antennapod.view.ItemOffsetDecoration;
import de.danoeh.antennapod.view.PlaybackSpeedSeekBar;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Locale;

public class VariableSpeedDialog extends DialogFragment {
    private SpeedSelectionAdapter adapter;
    private final DecimalFormat speedFormat;
    private PlaybackController controller;
    private final List<Float> selectedSpeeds;
    private PlaybackSpeedSeekBar speedSeekBar;
    private Chip addCurrentSpeedChip;

    public VariableSpeedDialog() {
        DecimalFormatSymbols format = new DecimalFormatSymbols(Locale.US);
        format.setDecimalSeparator('.');
        speedFormat = new DecimalFormat("0.00", format);
        selectedSpeeds = new ArrayList<>(UserPreferences.getPlaybackSpeedArray());
    }

    public static void showGetPluginDialog(final Context context) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setTitle(R.string.no_playback_plugin_title);
        builder.setMessage(R.string.no_playback_plugin_or_sonic_msg);
        builder.setPositiveButton(R.string.enable_sonic, (dialog, which) -> {
            UserPreferences.enableSonic();
        });
        builder.setNeutralButton(R.string.close_label, null);
        builder.show();
    }

    @Override
    public void onStart() {
        super.onStart();
        controller = new PlaybackController(getActivity()) {
            @Override
            public void setupGUI() {
                updateSpeed();
            }

            @Override
            public void onPlaybackSpeedChange() {
                updateSpeed();
            }
        };
        controller.init();
        speedSeekBar.setController(controller);
    }

    private void updateSpeed() {
        speedSeekBar.updateSpeed();
        addCurrentSpeedChip.setText(speedFormat.format(controller.getCurrentPlaybackSpeedMultiplier()));
    }

    @Override
    public void onStop() {
        super.onStop();
        controller.release();
        controller = null;
    }

    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
        builder.setPositiveButton(R.string.close_label, null);

        View root = View.inflate(getContext(), R.layout.speed_select_dialog, null);
        speedSeekBar = root.findViewById(R.id.speed_seek_bar);
        RecyclerView selectedSpeedsGrid = root.findViewById(R.id.selected_speeds_grid);
        selectedSpeedsGrid.setLayoutManager(new GridLayoutManager(getContext(), 3));
        selectedSpeedsGrid.addItemDecoration(new ItemOffsetDecoration(getContext(), 4));
        adapter = new SpeedSelectionAdapter();
        adapter.setHasStableIds(true);
        selectedSpeedsGrid.setAdapter(adapter);

        addCurrentSpeedChip = root.findViewById(R.id.add_current_speed_chip);
        addCurrentSpeedChip.setCloseIconVisible(true);
        addCurrentSpeedChip.setCloseIconResource(R.drawable.ic_add_black);
        addCurrentSpeedChip.setOnCloseIconClickListener(v -> addCurrentSpeed());
        addCurrentSpeedChip.setOnClickListener(v -> addCurrentSpeed());

        builder.setView(root);
        return builder.create();
    }

    private void addCurrentSpeed() {
        float newSpeed = controller.getCurrentPlaybackSpeedMultiplier();
        if (selectedSpeeds.contains(newSpeed)) {
            Snackbar.make(addCurrentSpeedChip,
                    getString(R.string.preset_already_exists, newSpeed), Snackbar.LENGTH_LONG).show();
        } else {
            selectedSpeeds.add(newSpeed);
            Collections.sort(selectedSpeeds);
            UserPreferences.setPlaybackSpeedArray(selectedSpeeds);
            adapter.notifyDataSetChanged();
        }
    }

    public class SpeedSelectionAdapter extends RecyclerView.Adapter<SpeedSelectionAdapter.ViewHolder> {

        @Override
        @NonNull
        public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
            Chip chip = new Chip(getContext());
            chip.setCloseIconVisible(true);
            chip.setCloseIconResource(R.drawable.ic_delete_black);
            return new ViewHolder(chip);
        }

        @Override
        public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
            float speed = selectedSpeeds.get(position);

            holder.chip.setText(speedFormat.format(speed));
            holder.chip.setOnCloseIconClickListener(v -> {
                selectedSpeeds.remove(speed);
                UserPreferences.setPlaybackSpeedArray(selectedSpeeds);
                notifyDataSetChanged();
            });
            holder.chip.setOnClickListener(v -> {
                if (controller != null) {
                    controller.setPlaybackSpeed(speed);
                    notifyDataSetChanged();
                }
            });
        }

        @Override
        public int getItemCount() {
            return selectedSpeeds.size();
        }

        @Override
        public long getItemId(int position) {
            return selectedSpeeds.get(position).hashCode();
        }

        public class ViewHolder extends RecyclerView.ViewHolder {
            Chip chip;

            ViewHolder(Chip itemView) {
                super(itemView);
                chip = itemView;
            }
        }
    }
}