package ch.zhaw.pm2.racetrack;

import org.beryx.textio.TextIO;
import org.beryx.textio.TextIoFactory;
import org.beryx.textio.TextTerminal;

import java.util.List;

public class UserInterface {

    private final TextIO textIO;
    private final TextTerminal<?> textTerminal;

    /**
     * Opens a new Terminal Window and prints the welcome Text
     * @param welcomeText The Text which will be printed after the windows is opened.
     */
    public UserInterface(String welcomeText) {
        textIO = TextIoFactory.getTextIO();
        textTerminal = textIO.getTextTerminal();

        textTerminal.println(welcomeText + "\n");
    }

    /**
     * asks the user to choose one of the options given.
     * @param text Text which is printed befor the options are printed. Example: "Select Track file:"
     * @param options List with the options which can be selected.
     * @return the list index of the selected option
     */
    public int selectOption(String text, List<String> options) {
        textTerminal.println(text + ":\n");
        for(int option = 0; option < options.size(); option ++) {
            textTerminal.println(" " + (option + 1) +  ": " + options.get(option));
        }
        return textIO.newIntInputReader().withMinVal(1).withMaxVal(options.size()).read("Enter your choice: ") - 1;
    }

    /**
     * gives information which player's turn it is and asks for the direction to accelerate
     * @param playingCarIndex the index of the player
     * @param playingCarID the ID of the player
     * @return the direction which is selected by the player. If null -> quit game
     */
    public PositionVector.Direction selectDirection(int playingCarIndex, char playingCarID) {
        PositionVector.Direction direction = null;
        textTerminal.println("Playing Car " + playingCarIndex + ": " + playingCarIndex);
        textTerminal.println("Directions are based on the number pad:");
        textTerminal.println("7 8 9    7=up-left,    8=up,               9=up-right");
        textTerminal.println("4 5 6    4=left,       5=no acceleration,  6=right");
        textTerminal.println("1 2 3    1=down-left,  2=down,             3=down-right");
        textTerminal.println("\n10 = quit \n");

        while (direction == null) { //asks until a valid input in entered
            int number = textIO.newIntInputReader().withMinVal(1).withMaxVal(10).read("choose your Acceleration direction: ");
            if (number == 10) { //quit game
                return null;
            }
            direction = getDirection(number);
        }
        return direction;
    }

    /**
     * returns the the associated direction Object
     * @param number the number which was typed by the user
     * @return the associated direction. If null -> unknown number
     */
    private PositionVector.Direction getDirection(int number) {
        return switch (number) {
            case 1 -> PositionVector.Direction.DOWN_LEFT;
            case 2 -> PositionVector.Direction.DOWN;
            case 3 -> PositionVector.Direction.DOWN_RIGHT;
            case 4 -> PositionVector.Direction.LEFT;
            case 5 -> PositionVector.Direction.NONE;
            case 6 -> PositionVector.Direction.RIGHT;
            case 7 -> PositionVector.Direction.UP_LEFT;
            case 8 -> PositionVector.Direction.UP;
            case 9 -> PositionVector.Direction.UP_RIGHT;
            default -> null;
        };
    }

    /**
     * prints the given Track in the terminal
     * @param track the track which should be printed
     */
    public void printTrack(Track track) {
            textTerminal.println(track.toString());
    }



}