/*
 * mygram-droid: Android TV client for Foldergram.
 * Copyright (C) 2026 Danilo M. <danix@danix.xyz>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * This program 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.
 */

package mygram.droid;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.InputType;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.Toast;

/** Viewer password, durations, app PIN, change instance. */
public final class SettingsActivity extends Activity {
	private static final int PIN_INPUT = InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_VARIATION_PASSWORD;

	@Override
	protected void onCreate(Bundle state) {
		super.onCreate(state);
		LinearLayout box = Ui.column(this);
		box.addView(Ui.text(this, Prefs.server(), 18));
		box.addView(Ui.text(this, "Viewer password", 14));
		EditText pw = Ui.field(this, "Password", Ui.password());
		pw.setText(Prefs.password());
		box.addView(pw);
		box.addView(Ui.text(this, "Photo duration, seconds", 14));
		EditText photo = Ui.field(this, "8", InputType.TYPE_CLASS_NUMBER);
		photo.setText(String.valueOf(Prefs.photoSeconds()));
		box.addView(photo);
		box.addView(Ui.text(this, "Background change, seconds", 14));
		EditText bg = Ui.field(this, "15", InputType.TYPE_CLASS_NUMBER);
		bg.setText(String.valueOf(Prefs.backgroundSeconds()));
		box.addView(bg);
		box.addView(Ui.text(this, Prefs.hasPin() ? "New app PIN, 4 to 8 digits (empty keeps it)"
				: "App PIN, 4 to 8 digits (empty for none)", 14));
		EditText pin = Ui.field(this, "PIN", PIN_INPUT);
		box.addView(pin);
		EditText again = Ui.field(this, "Repeat PIN", PIN_INPUT);
		box.addView(again);
		LinearLayout row = Ui.row(this);
		row.addView(Ui.iconButton(this, R.drawable.ic_check, "Save", v -> save(pw.getText().toString(),
				photo.getText().toString(), bg.getText().toString(), pin.getText().toString(),
				again.getText().toString())));
		if (Prefs.hasPin())
			row.addView(Ui.iconButton(this, R.drawable.ic_lock_open, "Remove PIN", v -> {
				Prefs.setPin(null);
				Toast.makeText(this, "PIN removed", Toast.LENGTH_SHORT).show();
				finish();
			}));
		row.addView(Ui.iconButton(this, R.drawable.ic_swap, "Change instance",
				v -> startActivity(new Intent(this, SetupActivity.class))));
		box.addView(row);

		// Taller than the screen with the PIN fields; the scroll view follows focus.
		ScrollView scroll = new ScrollView(this);
		scroll.addView(box);
		LinearLayout column = new LinearLayout(this);
		column.setOrientation(LinearLayout.VERTICAL);
		column.addView(Ui.header(this, "Settings"));
		column.addView(scroll, new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 0, 1));
		setContentView(column);
		row.getChildAt(0).requestFocus();
	}

	private void save(String password, String photo, String background, String pin, String again) {
		int p = seconds(photo), b = seconds(background);
		if (p < 1 || b < 1) {
			toast("Durations must be 1 to 600 seconds");
			return;
		}
		if (!pin.isEmpty() || !again.isEmpty()) {
			if (!Prefs.validPin(pin)) {
				toast("The PIN must be 4 to 8 digits");
				return;
			}
			if (!pin.equals(again)) {
				toast("The two PINs differ");
				return;
			}
		}
		Prefs.setTimes(p, b);
		if (!pin.isEmpty()) {
			Prefs.setPin(pin);
			App.locked = false; // just typed it; ask from the next time the app leaves the screen
		}
		if (password.equals(Prefs.password())) {
			finish();
			return;
		}
		Api.async(() -> {
			Api.login(Prefs.server(), password);
			return true;
		}, ok -> {
			Prefs.setPassword(password);
			finish();
		}, e -> toast("Login failed: " + e.getMessage()));
	}

	private void toast(String s) {
		Toast.makeText(this, s, Toast.LENGTH_LONG).show();
	}

	private static int seconds(String s) {
		try {
			int v = Integer.parseInt(s.trim());
			return v <= 600 ? v : -1;
		} catch (NumberFormatException e) {
			return -1;
		}
	}
}