package com.rubenvandeven.emotionhero;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;

import com.affectiva.android.affdex.sdk.Frame;
import com.affectiva.android.affdex.sdk.detector.Face;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Timer;
import java.util.TimerTask;

/**
 * Created by ruben on 16/08/16.
 */

public class Scenario {

    public int id;

    public Bitmap currentFrameBitmap;

    public static final int LVL_NONE = 0;
    public static final int LVL_ANGER = 1;
    public static final int LVL_JOY = 2;
    public static final int LVL_SURPRISE = 3;

    // the levels in the right order.
    public static final ArrayList<Integer> SCENARIOS = new ArrayList<Integer>() {{
        add(LVL_ANGER);
        add(LVL_JOY);
        add(LVL_SURPRISE);
    }};

    static int DESIRED_FPS = 25;

    float duration = 0;

    /**
     * @deprecated
     */
    long startTime = 0;

    /**
     * The timer that provides the tick
     */
    Timer timer;

    /**
     * Increment on each tick
     */
    float runningTime = -1;


    boolean isRunning = false;

    private GamingActivity _activity;

    /**
     * The scorres in this moment, as to draw them on the screen.
     * Indexes are Emotion ordinals
     */
    private Face currentFace;

    ArrayList<Target> targets = new ArrayList<>();

    class Target {
        public Emotion emotion;
        public float value;
        public float timestamp;
        public Score score;
    }

    ArrayList<Score> scores = new ArrayList<>();

    class Score {
        public float value;
        /**
         * Extra bonus given
         */
        public boolean isSpotOn = false;
//        public Bitmap image; //image at time of score
        public Face face; // face at time of score
    }

    /**
     * Constructor
     */
    public Scenario(int lvl_id, GamingActivity activity)
    {
        // go to first scenario if unexisting is given
        if(!SCENARIOS.contains(lvl_id)) {
            lvl_id = SCENARIOS.get(0);
        }

        this.id = lvl_id;
        _activity = activity;
        createTargets();
        init();
    }

    public void init() {

        timer = new Timer("ScenarioTimer");
        TimerTask tickTask;
        tickTask = new TimerTask() {
            @Override
            public void run() {
                //                if (System.currentTimeMillis() - scheduledExecutionTime() >=
                //                        MAX_TARDINESS)
                //                    return;  // Too late; skip this execution.
                tick();
            }
        };
        timer.schedule(tickTask, 0, 1000/DESIRED_FPS);

    }

    /**
     * To be called on each timer tick
     */
    public void tick()
    {
        if(!isRunning)
            return;

        runningTime += 1.0f/DESIRED_FPS;

        if(isFinished()) {
            stop();
            return;
        }

        for (int i = targets.size() - 1; i >= 0; i--) {
            Target target = targets.get(i);
            // skip targets that are already scored
            if(target.score != null) {
                continue;
            }
            if(target.timestamp <= runningTime) {
                float scored_value = target.emotion.getValueFromFace(currentFace);
                float required_value = target.value;
                Score score = new Score();
                score.value = Math.round(100 - Math.abs(scored_value-required_value));
                score.face = currentFace;
                scores.add(score);

                //
                _activity.sound.play(_activity.soundIds.get(_activity.SOUND_SCORE), 1, 1,
                                        1,0, score.value / 200f + 0.5f ); // play back the sound slower
                                                                        // depending on score value
                target.score = score;
            }
        }

    }


    /**
     * Add a target on given timestamp
     * @param emotion
     * @param value
     * @param timestamp
     */
    public void setTarget(Emotion emotion, float value, float timestamp)
    {
//        Log.e(GamingActivity.LOG_TAG, "Set target:" + Float.toString(timestamp) + " " + Float.toString(duration));
        if((timestamp + 1) > duration)
        {
            duration = timestamp + 1; // always a bit onger than last target, as it otherwise the game does not finish pretty
        }
        Target target = new Target();
        target.timestamp = timestamp;
        target.value = value;
        target.emotion = emotion;
        targets.add(target);
    }

    /**
     * Add target after existing targets, give delta with last item instead of absolute time.
     * @param emotion
     * @param value
     * @param interval
     */
    public void addTarget(Emotion emotion, float value, float interval)
    {
        float timestamp;
        if(targets.isEmpty()) {
            timestamp = interval;
        } else {
            timestamp = targets.get(targets.size() - 1).timestamp + interval;
        }
        setTarget(emotion, value, timestamp);
    }

    /**
     * @deprecated use @see tick()
     * @param face
     * @param timestamp
     */
    public void validateFaceOnTime(Face face, float timestamp)
    {
//        TODO: interpolation of time
        for (int i = targets.size() - 1; i >= 0; i--) {
            Target target = targets.get(i);
            if(target.timestamp > timestamp - 0.2 && target.timestamp < timestamp + 0.2) {
                float scored_value = target.emotion.getValueFromFace(face);
                float required_value = target.value;
                Score score = new Score();
                score.value = 100 - Math.abs(scored_value-required_value);
                target.score = score;
                scores.add(score);
            }
        }
    }

    public float getTotalScore()
    {
        float value = 0;
        for (Score score : scores) {
            value += score.value;
        }
        return value;
    }

    /**
     * Check whether given timestamp is within duration of the scenario
     * @param timestamp
     * @return
     */
    public boolean isWithinTime(float timestamp)
    {
        return timestamp <= duration;
    }

    public ArrayList<Target> getTargets() {
        return targets;
    }


    /**
     * Get the time within the scenario (so since start() has been called)
     */
    public float getTime() {
        return runningTime;
        // if not started, don't move the labels, if started, move them by diff_y
//        if(startTime == 0) {
//            return 0;
//        } else {
//            float diff_t = ((System.currentTimeMillis() - startTime)) / (float) 1000;
//            if(diff_t > duration) { // never larger than scenario duration
//                return duration;
//            }
//            return diff_t;
//        }
    }

    public void start()
    {
        startTime = System.currentTimeMillis();
        isRunning = true;
    }

    public void pause() {
        isRunning = false;
    }

    public void stop()
    {
        isRunning = false;
    }


    //  TODO: create AttributeScoreCollection class, with this method.
    public void setCurrentFace(Face face)
    {
        currentFace = face;
    }

    public boolean isFinished()
    {
        return runningTime > duration;
    }

    public Highscore getHighscore() {
        if(!isFinished()) {
            return null;
        }

        return new Highscore("Levelname!", getTotalScore());
    }

    public int getMaxScore() {
        return targets.size() * 100;
    }

    public void createTargets() {
        switch(id) {
            case LVL_ANGER:
                setTarget(Emotion.ANGER, 10, 1);
                setTarget(Emotion.ANGER, 20, 2);
                setTarget(Emotion.ANGER, 40, 3);
                setTarget(Emotion.ANGER, 70, 4);
                setTarget(Emotion.ANGER, 100, 5);
                setTarget(Emotion.JOY, 100, 8);
                setTarget(Emotion.ANGER, 100, 10);
                setTarget(Emotion.JOY, 100, 15);
                setTarget(Emotion.ANGER, 100, 20);
                break;
            case LVL_JOY:
                break;
            case LVL_SURPRISE:
                setTarget(Emotion.SURPRISE, 20, 1);
                setTarget(Emotion.SURPRISE, 50, 2);
                setTarget(Emotion.SURPRISE, 80, 3);
                setTarget(Emotion.SURPRISE, 100, 4);
                break;
        }

    }

    public int getNextLevelId() {
        int nextIdx = SCENARIOS.indexOf(id) + 1;
        if(SCENARIOS.size() <= nextIdx) {
            return SCENARIOS.get(0);
        }
        return SCENARIOS.get(nextIdx);
    }

    public boolean isFinalLevel() {
        if(SCENARIOS.get(SCENARIOS.size()-1) == id)
            return true;
        return false;
    }

}