package ch.zhaw.pm2.racetrack;

import ch.zhaw.pm2.racetrack.given.ConfigSpecification;
import org.junit.jupiter.api.*;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;


public class TrackTest {
    Track trackObj;

    @Nested
    @DisplayName("Positiv Test Cases")
    class positivClass {

        @BeforeEach
        void setup() {
            File file = new File(".\\tracks\\challenge.txt");
            try {
                trackObj = new Track(file);
            } catch (FileNotFoundException | InvalidTrackFormatException e) {
                e.printStackTrace();
                Assertions.fail();
            }

        }

        @Test
        @DisplayName("Create correct amount of Car instance")
        void checkCars() {
            Assertions.assertEquals(2, trackObj.getCarCount());
        }

        @Test
        @DisplayName("Create Car instance with correct Symbols / Id")
        void checkCarId() {
            Assertions.assertEquals('a', trackObj.getCarId(0));
            Assertions.assertEquals('b', trackObj.getCarId(1));
        }


        @Test
        @DisplayName("Check getSpaceTyp")
        void getSpaceTyp() {
            Assertions.assertEquals(ConfigSpecification.SpaceType.FINISH_RIGHT, trackObj.getSpaceType(new PositionVector(22, 24)));
        }

        @Test
        @DisplayName("Find FinishLine")
        void findFinish() {
            List<PositionVector> expected = new ArrayList<>();
            expected.add(new PositionVector(22, 22));
            expected.add(new PositionVector(22, 23));
            expected.add(new PositionVector(22, 24));
            Assertions.assertEquals(expected, trackObj.getFinishLine());
        }

        @Test
        @DisplayName("Converts Trackfile correctly to List<String>")
        void checkTrack() {
            Track trackObj;
            try {
                trackObj = new Track(new File(".\\tracks\\oval-anticlock-right.txt"));
                List<String> track = new ArrayList<>();
                track.add("##################################################");
                track.add("##################################################");
                track.add("##############                       #############");
                track.add("##########                              ##########");
                track.add("#######                                    #######");
                track.add("######          #################           ######");
                track.add("#####          ###################           #####");
                track.add("#####          ###################           #####");
                track.add("######          #################           ######");
                track.add("#######             > a                    #######");
                track.add("##########          >                   ##########");
                track.add("##############      > b             ##############");
                track.add("##################################################");
                track.add("##################################################");
                Assertions.assertLinesMatch(track, trackObj.getTrack());
            } catch (FileNotFoundException | InvalidTrackFormatException e) {
                e.printStackTrace();
            }
        }

        @Test
        @DisplayName("Make Car move down on track")
        void makeCarMoveDown() {
            PositionVector beforeMove = trackObj.getCarPos(0);
            trackObj.getCar(0).accelerate(PositionVector.Direction.DOWN);
            trackObj.moveCar(0);
            PositionVector afterMove = trackObj.getCarPos(0);
            Assertions.assertEquals(beforeMove.getY() + 1, afterMove.getY());
            Assertions.assertEquals(beforeMove.getX(), afterMove.getX());
        }

        @Test
        @DisplayName("Make Car move with (0,0) acceleration on track")
        void makeCarStay() {
            PositionVector beforeMove = trackObj.getCarPos(0);
            trackObj.moveCar(0);
            PositionVector afterMove = trackObj.getCarPos(0);
            Assertions.assertEquals(beforeMove.getY(), afterMove.getY());
            Assertions.assertEquals(beforeMove.getX(), afterMove.getX());
        }

        @Test
        @DisplayName("Will Car Crash")
        void willCarCrash() {
            //Car will Crash
            Assertions.assertTrue(trackObj.willCrashAtPosition(0, new PositionVector(25, 21)));
            //Car will not Crash and is on track
            Assertions.assertFalse(trackObj.willCrashAtPosition(0, new PositionVector(7, 22)));
            //Car will not Crash and is on finishLine
            Assertions.assertFalse(trackObj.willCrashAtPosition(0, trackObj.getFinishLine().get(0)));

        }

        @Test
        @DisplayName("Make Car Crash")
        void makeCarCrash() {
            trackObj.carDoesCrash(0, new PositionVector(6, 22));
            Assertions.assertEquals(Track.CRASH_INDICATOR, trackObj.getTrack().get(22).charAt(6));
            Assertions.assertTrue(trackObj.getCar(0).isCrashed());
        }
    }

    @Nested
    @DisplayName("Negative TestCase")
    class negativeClass {
        File file;
        @BeforeEach
        void setup() {
            file = new File(".\\tracks\\challenge.txt");
            try {
                trackObj = new Track(file);

            } catch (InvalidTrackFormatException | FileNotFoundException e) {
                System.err.println("Error in Test compareTrack" + e.getMessage());
            }
        }

        @Test
        @DisplayName("Throw error if File not found")
        void canReadFile() {
            file = new File(".\\tracks\\NotExisting.txt");
            Assertions.assertThrows(FileNotFoundException.class, () -> new Track(file));
        }

        @Test
        @DisplayName("Throw error if File is invalid")
        void invalidTrackFile() {
            File testfile = new File(".\\src\\test\\InvalidTracks\\sameCar.txt");
            Assertions.assertThrows(InvalidTrackFormatException.class, () -> new Track(testfile));
        }
    }
}