package com.evsuite.abrp;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import java.util.Arrays;
import java.util.Collections;

import org.junit.Test;

public class NowPlayingTest {

    private static NowPlaying.Session session(String pkg, int state, String title, String artist, long updatedAt) {
        NowPlaying.Session s = new NowPlaying.Session();
        s.packageName = pkg;
        s.state = state;
        s.title = title;
        s.artist = artist;
        s.positionUpdatedAt = updatedAt;
        return s;
    }

    @Test
    public void nothingToShow() {
        assertNull(NowPlaying.pick(null));
        assertNull(NowPlaying.pick(Collections.emptyList()));
        // Bluetooth's empty session after the phone stopped, and one that only connects.
        assertNull(NowPlaying.pick(Arrays.asList(
                session("com.android.bluetooth", 1, "", "", 5),
                session("com.android.car.radio", 8, "Radio", null, 6),
                session("com.android.bluetooth", NowPlaying.STATE_PLAYING, " ", null, 7))));
    }

    @Test
    public void whatPlaysWinsOverWhatIsPaused() {
        // As on the car on 2026-10-28: CarPlay paused, Bluetooth playing.
        NowPlaying.Track t = NowPlaying.pick(Arrays.asList(
                session("com.allgo.remoteui.mediabrowserservice", NowPlaying.STATE_PAUSED, "A Mix", "Bass Bangers", 900),
                session("com.android.bluetooth", NowPlaying.STATE_PLAYING, "Paramount", "Mark Petrie & Andrew Prahlow", 100)));
        assertEquals(NowPlaying.Source.BLUETOOTH, t.source);
        assertEquals("Paramount", t.title);
        assertEquals("Mark Petrie & Andrew Prahlow", t.subtitle);
        assertTrue(t.playing);
    }

    @Test
    public void ofTwoPlayingTheNewerWins() {
        NowPlaying.Track t = NowPlaying.pick(Arrays.asList(
                session("com.android.bluetooth", NowPlaying.STATE_PLAYING, "Old", null, 100),
                session("com.allgo.remoteui.mediabrowserservice", NowPlaying.STATE_BUFFERING, "New", null, 200)));
        assertEquals(NowPlaying.Source.CARPLAY, t.source);
        assertEquals("New", t.title);
    }

    @Test
    public void withNothingPlayingThePausedOneShows() {
        NowPlaying.Track t = NowPlaying.pick(Arrays.asList(
                session("com.android.bluetooth", NowPlaying.STATE_PAUSED, "Earlier", null, 100),
                session("com.allgo.remoteui.mediabrowserservice", NowPlaying.STATE_PAUSED, "Later", null, 300)));
        assertEquals("Later", t.title);
        assertFalse(t.playing);
    }

    @Test
    public void theRadioShowsItsTextWithTheStationBelow() {
        NowPlaying.Track t = NowPlaying.pick(Collections.singletonList(
                session("com.saicmotor.radio", NowPlaying.STATE_PLAYING, "Brillux Radio", "BLIND MELON - NO RAIN", 1)));
        assertEquals(NowPlaying.Source.RADIO, t.source);
        assertEquals("BLIND MELON - NO RAIN", t.title);
        assertEquals("Brillux Radio", t.subtitle);
        NowPlaying.Track station = NowPlaying.pick(Collections.singletonList(
                session("com.saicmotor.radio", NowPlaying.STATE_PLAYING, "Brillux Radio", "", 1)));
        assertEquals("Brillux Radio", station.title);
        assertNull(station.subtitle);
        assertEquals(-1f, station.progressAt(5), 0f);
    }

    @Test
    public void textIsCleaned() {
        assertEquals("A Letter to the Past (A Seasonal Feels Mix) Ft. Porter Robinson & Friends By SAINT",
                NowPlaying.clean("A Letter to the Past (A Seasonal Feels Mix) Ft. Porter Robinson & Friends By SAINT [X4nayMeMBuQ]"));
        assertEquals("Live [Remastered 2011]", NowPlaying.clean("Live [Remastered 2011]"));
        assertEquals("two lines", NowPlaying.clean("  two\n  lines "));
        assertNull(NowPlaying.clean("   "));
        assertNull(NowPlaying.clean(null));
        StringBuilder longText = new StringBuilder();
        for (int i = 0; i < 300; i++) longText.append('x');
        assertEquals(200, NowPlaying.clean(longText.toString()).length());
    }

    @Test
    public void onlyAnArtistStillShows() {
        NowPlaying.Track t = NowPlaying.pick(Collections.singletonList(
                session("com.example.player", NowPlaying.STATE_PLAYING, null, "Someone", 1)));
        assertEquals(NowPlaying.Source.OTHER, t.source);
        assertEquals("Someone", t.title);
        assertNull(t.subtitle);
    }

    @Test
    public void thePositionRunsOnWhilePlayingAndStopsAtTheEnd() {
        NowPlaying.Session s = session("com.android.bluetooth", NowPlaying.STATE_PLAYING, "Paramount", "M", 10_000);
        s.positionMs = 3_000;
        s.durationMs = 215_000;
        NowPlaying.Track t = NowPlaying.pick(Collections.singletonList(s));
        assertEquals(3_000, t.positionAt(10_000));
        assertEquals(8_000, t.positionAt(15_000));
        assertEquals(215_000, t.positionAt(10_000_000));
        assertEquals(1f, t.progressAt(10_000_000), 0f);
        assertEquals(8_000 / 215_000f, t.progressAt(15_000), 1e-6f);
    }

    @Test
    public void aPausedPositionStaysPut() {
        NowPlaying.Session s = session("com.android.bluetooth", NowPlaying.STATE_PAUSED, "Paramount", null, 10_000);
        s.positionMs = 3_000;
        s.durationMs = 215_000;
        assertEquals(3_000, NowPlaying.pick(Collections.singletonList(s)).positionAt(99_000));
    }

    @Test
    public void noPositionNoBar() {
        NowPlaying.Session s = session("com.android.bluetooth", NowPlaying.STATE_PLAYING, "Paramount", null, 10_000);
        s.durationMs = 215_000;
        assertEquals(-1f, NowPlaying.pick(Collections.singletonList(s)).progressAt(20_000), 0f);
    }

    @Test
    public void sourcesAreKnownByTheirApps() {
        assertEquals(NowPlaying.Source.BLUETOOTH, NowPlaying.source("com.android.bluetooth"));
        assertEquals(NowPlaying.Source.CARPLAY, NowPlaying.source("com.allgo.remoteui.mediabrowserservice"));
        assertEquals(NowPlaying.Source.RADIO, NowPlaying.source("com.saicmotor.radio"));
        assertEquals(NowPlaying.Source.OTHER, NowPlaying.source("com.android.music"));
        assertEquals(NowPlaying.Source.OTHER, NowPlaying.source(null));
    }
}