package de.ctdo.crashtest;

import java.util.ArrayList;
import java.util.List;

public class Statemachine {
    private final char BLUE_BUTTON = 'd';
    private final char LIGHT_BARRIER = 'k';
    private final char TABLE_ONE = 'c';
    private final char TABLE_TWO = 'v';
    private final char TABLE_THREE = 'b';
    private long lastHandleInput = 0;
    private final List<StateChangeListener> stateChangeListenerList = new ArrayList<StateChangeListener>();
    private int stateChangeCounter = 0;

    public void addStateChangedListener(StateChangeListener listener) {
        stateChangeListenerList.add(listener);
    }

    public enum state {
        IDLE,
        ENTERED_ROOM,
        TABLE_GAME_ONE,
        TABLE_GAME_TWO,
        TABLE_GAME_THREE,
        TABLE_GAME_FOUR,
        TABLE_GAME_FIVE,
        TABLE_GAME_SIX,
        TABLE_GAME_SEVEN,
        FINISH,
    }

    private state currentState = state.IDLE;


    public state getCurrentState() {
        return currentState;
    }

    public int getStateChangeCounter() {
        return stateChangeCounter;
    }

    public void reset() {
        stateChangeCounter = 0;
        currentState = state.IDLE;
    }

    public void handleInput(char input) {
        if(System.currentTimeMillis() - lastHandleInput < 200 ) return;

        state newState = getNewState(input);

        if( newState != currentState ) {
            stateChangeCounter++;
            System.out.println("newState = " + newState);

            workForState(newState);


            currentState = newState;
            onStateChanged();
        }


        lastHandleInput = System.currentTimeMillis();
    }

    private void onStateChanged() {
        for(StateChangeListener listener: stateChangeListenerList) {
            listener.stateChanged(currentState);
        }
    }

    private void workForState(state newState) {
        switch (newState) {
            case IDLE:
                break;
            case ENTERED_ROOM:


                break;
            case TABLE_GAME_ONE:
                break;
            case TABLE_GAME_TWO:
                break;
            case TABLE_GAME_THREE:
                break;
            case TABLE_GAME_FOUR:
                break;
            case TABLE_GAME_FIVE:
                break;
            case TABLE_GAME_SIX:
                break;
            case TABLE_GAME_SEVEN:
                break;
        }
    }

    private state getNewState(char input) {
        state retVal = currentState;
        
        switch (currentState) {
            case IDLE:
                if(input == LIGHT_BARRIER) {
                    retVal = state.ENTERED_ROOM;
                }
                break;
            case ENTERED_ROOM:
                if(input == TABLE_ONE) {
                    retVal = state.TABLE_GAME_ONE;
                }
                break;
            case TABLE_GAME_ONE:
                if(input == TABLE_TWO) {
                    retVal = state.TABLE_GAME_TWO;
                } else {
                    retVal = state.TABLE_GAME_ONE;
                }
                break;
            case TABLE_GAME_TWO:
                if(input == TABLE_THREE) {
                    retVal = state.TABLE_GAME_THREE;
                } else {
                    retVal = state.TABLE_GAME_ONE;
                }
                break;
            case TABLE_GAME_THREE:
                if(input == TABLE_TWO) {
                    retVal = state.TABLE_GAME_FOUR;
                } else {
                    retVal = state.TABLE_GAME_ONE;
                }
                break;
            case TABLE_GAME_FOUR:
                if(input == TABLE_THREE) {
                    retVal = state.TABLE_GAME_FIVE;
                } else {
                    retVal = state.TABLE_GAME_ONE;
                }
                break;
            case TABLE_GAME_FIVE:
                if(input == TABLE_ONE) {
                    retVal = state.TABLE_GAME_SIX;
                } else {
                    retVal = state.TABLE_GAME_ONE;
                }
                break;
            case TABLE_GAME_SIX:
                if(input == TABLE_THREE) {
                    retVal = state.TABLE_GAME_SEVEN;
                } else {
                    retVal = state.TABLE_GAME_ONE;
                }
                break;
            case TABLE_GAME_SEVEN:
                if(input == BLUE_BUTTON) {
                    retVal = state.FINISH;
                } else {
                    retVal = state.TABLE_GAME_ONE;
                }
                break;


        }


        return retVal;
    }
}