package eu.faircode.email;

/*
    This file is part of FairEmail.

    FairEmail is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    FairEmail is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with FairEmail.  If not, see <http://www.gnu.org/licenses/>.

    Copyright 2018-2024 by Marcel Bokhorst (M66B)
*/

import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.res.ColorStateList;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.os.Bundle;
import android.view.HapticFeedbackConstants;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.core.content.ContextCompat;
import androidx.core.widget.TextViewCompat;
import androidx.preference.PreferenceManager;

import java.text.Collator;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;

public class FragmentMoveAsk extends FragmentDialogBase {
    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
        String notagain = getArguments().getString("notagain");
        ArrayList<FragmentMessages.MessageTarget> result = getArguments().getParcelableArrayList("result");

        final Context context = getContext();
        View dview = LayoutInflater.from(context).inflate(R.layout.dialog_ask_move, null);
        TextView tvMessages = dview.findViewById(R.id.tvMessages);
        TextView tvSourceFolders = dview.findViewById(R.id.tvSourceFolders);
        TextView tvTargetFolders = dview.findViewById(R.id.tvTargetFolders);
        CheckBox cbNotAgain = dview.findViewById(R.id.cbNotAgain);
        TextView tvJunkLearn = dview.findViewById(R.id.tvJunkLearn);

        String question = context.getResources()
                .getQuantityString(R.plurals.title_moving_messages,
                        result.size(), result.size());

        tvMessages.setText(question);
        tvSourceFolders.setText(getNames(result, false));
        tvTargetFolders.setText(getNames(result, true));

        List<String> sources = new ArrayList<>();
        List<String> targets = new ArrayList<>();
        Integer sourceColor = null;
        Integer targetColor = null;
        boolean junk = false;
        for (FragmentMessages.MessageTarget t : result) {
            if (!sources.contains(t.sourceFolder.type))
                sources.add(t.sourceFolder.type);
            if (!targets.contains(t.targetFolder.type))
                targets.add(t.targetFolder.type);
            if (sourceColor == null)
                sourceColor = t.sourceFolder.color;
            if (targetColor == null)
                targetColor = t.targetFolder.color;
            if (!junk &&
                    (EntityFolder.JUNK.equals(t.sourceFolder.type) ||
                            EntityFolder.JUNK.equals(t.targetFolder.type)))
                junk = true;
        }

        Drawable source = null;
        if (sources.size() == 1) {
            source = ContextCompat.getDrawable(context, EntityFolder.getIcon(sources.get(0)));
            if (source != null)
                source.setBounds(0, 0, source.getIntrinsicWidth(), source.getIntrinsicHeight());
            if (sourceColor == null)
                sourceColor = EntityFolder.getDefaultColor(sources.get(0), context);
        } else {
            source = ContextCompat.getDrawable(context, R.drawable.twotone_folders_24);
            source.setBounds(0, 0, source.getIntrinsicWidth(), source.getIntrinsicHeight());
            sourceColor = null;
        }

        Drawable target = null;
        if (targets.size() == 1) {
            target = ContextCompat.getDrawable(context, EntityFolder.getIcon(targets.get(0)));
            if (target != null)
                target.setBounds(0, 0, target.getIntrinsicWidth(), target.getIntrinsicHeight());
            if (targetColor == null)
                targetColor = EntityFolder.getDefaultColor(targets.get(0), context);
        } else
            targetColor = null;

        tvSourceFolders.setCompoundDrawablesRelative(source, null, null, null);
        tvTargetFolders.setCompoundDrawablesRelative(target, null, null, null);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (sourceColor != null)
                TextViewCompat.setCompoundDrawableTintList(tvSourceFolders, ColorStateList.valueOf(sourceColor));
            if (targetColor != null)
                TextViewCompat.setCompoundDrawableTintList(tvTargetFolders, ColorStateList.valueOf(targetColor));
        }

        if (notagain != null)
            cbNotAgain.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(buttonView.getContext());
                    prefs.edit().putBoolean(notagain, isChecked).apply();
                }
            });

        tvJunkLearn.setVisibility(junk ? View.VISIBLE : View.GONE);

        return new AlertDialog.Builder(context)
                .setView(dview)
                .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Helper.performHapticFeedback(dview, HapticFeedbackConstants.CONFIRM);
                        sendResult(Activity.RESULT_OK);
                    }
                })
                .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        sendResult(Activity.RESULT_CANCELED);
                    }
                })
                .create();
    }

    static String getNames(ArrayList<FragmentMessages.MessageTarget> result, boolean dest) {
        boolean across = false;
        for (FragmentMessages.MessageTarget target : result)
            if (target.isAcross())
                across = true;

        Map<String, Integer> nameCount = new HashMap<>();
        for (FragmentMessages.MessageTarget target : result) {
            String name = "";
            if (across)
                name += (dest ? target.targetAccount.name : target.sourceAccount.name) + "/";
            name += (dest ? target.targetFolder.display : target.sourceFolder.display);
            if (!nameCount.containsKey(name))
                nameCount.put(name, 0);
            nameCount.put(name, nameCount.get(name) + 1);
        }

        List<String> keys = new ArrayList(nameCount.keySet());

        Collator collator = Collator.getInstance(Locale.getDefault());
        collator.setStrength(Collator.SECONDARY); // Case insensitive, process accents etc
        Collections.sort(keys, collator);

        NumberFormat NF = NumberFormat.getNumberInstance();

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < keys.size(); i++) {
            if (i > 0)
                sb.append(", ");
            sb.append(keys.get(i));
            if (!dest && keys.size() > 1) {
                int count = nameCount.get(keys.get(i));
                sb.append('(').append(NF.format(count)).append(')');
            }
        }

        return sb.toString();
    }
}