package com.rubenvandeven.emotionhero;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.PointF;
import android.graphics.Rect;
import android.util.Log;

import com.google.gson.Gson;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.JsonHttpResponseHandler;
import com.loopj.android.http.RequestHandle;
import com.loopj.android.http.RequestParams;
import com.loopj.android.http.SyncHttpClient;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Locale;
import java.util.TimeZone;

import cz.msebera.android.httpclient.Header;
import cz.msebera.android.httpclient.HeaderElement;
import cz.msebera.android.httpclient.ParseException;
import cz.msebera.android.httpclient.entity.StringEntity;

/**
 * Created by ruben on 01/09/16.
 *
 * A way to interact with api.emotionhero.com
 */

public class ApiRestClient {
    private static final String BASE_URL = "https://api.emotionhero.com";

    /**
     * For some reason validation of SSL certificate needs to be disabled (using true).
     * Otherwise async-http-client tries to validate other virtualhost (rubenvandeven.com) with api.emotionhero.com
     * which obviously is not the same domain. For some reason the connection is handles properly
     * by apache (so it detects the right VirtualHost...) ... odd :-(
     */
    private static AsyncHttpClient client = new AsyncHttpClient(true, 80, 443);

    private String jwt;

    private Player player;

    public ApiRestClient(Player player) {
        this.player = player;
    }

    public void registerIfNeeded() {
        if(player.getJWT() == null) {
            requestWithJWT(null, null, null, null, null);
        }
    }

    /**
     * For now call register endpoint. Given JWT should have a long enough lifetime (for now)
     * @todo However, custom token endpoint should be used eventually
     * @param method
     * @param url
     * @param postBody
     * @param getParams
     * @param responseHandler
     */
    public void requestWithJWT(final String method, final String url, final StringEntity postBody, final RequestParams getParams, final AsyncHttpResponseHandler responseHandler) {
        // sync call, so we can return a value!
        Log.v("API", "register");
        client.post(BASE_URL + "/api/register", null, new JsonHttpResponseHandler() {
            @Override
            public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
                // If the response is JSONObject instead of expected JSONArray
                try {
                    String token = response.getString("jwt");
                    String remoteId = response.getString("id");
                    Log.d("API", "Token " + token);
                    Log.d("API", "RemoteId" + remoteId);
                    getPlayer().setJWT(token);
                    getPlayer().setRemoteId(remoteId);

                    if(method != null) {
                        ApiRestClient.this.request( method, url, postBody, getParams, responseHandler);
                    }
                } catch (JSONException e) {
//                    responseHandler.sendFailureMessage(500, null, null);
                    // failure!!
                    // retrying later probably....
                    Log.e("API", "Failed request");
                    e.printStackTrace();
                }
            }

            @Override
            public void onFailure(int statusCode, Header[] headers, String responseString, Throwable throwable) {
                handleOnFailure(statusCode, headers, responseString, throwable);
            }

            @Override
            public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject response) {
                onFailure(statusCode, headers, response == null ? null:response.toString(), throwable);
            }
        });
    }

    public Player getPlayer() {
        return player;
    }

    class TokenHeader implements Header {
        /**
         * Get the name of the Header.
         *
         * @return the name of the Header,  never {@code null}
         */
        @Override
        public String getName() {
            return "X-Access-Token";
        }

        /**
         * Get the value of the Header.
         *
         * @return the value of the Header,  may be {@code null}
         */
        @Override
        public String getValue() {
            return "Bearer " + player.getJWT();
        }

        /**
         * Parses the value.
         *
         * @return an array of {@link HeaderElement} entries, may be empty, but is never {@code null}
         * @throws ParseException
         */
        @Override
        public HeaderElement[] getElements() throws ParseException {
            return new HeaderElement[]{};
        }
    }

    public void request(String method, String url, StringEntity postBody, RequestParams requestParams, AsyncHttpResponseHandler responseHandler) {
        Header[] headers = new Header[]{new TokenHeader()};
        Log.d("API", "Do request to: " + url);
        if(method == "post") {
            if(postBody != null) {
                client.post(player.getContext(), url, headers, postBody,"application/json", responseHandler);
            } else {
                // let content type be determinded by sender
                client.post(player.getContext(), url, headers, requestParams, null, responseHandler);
            }
        } else {
            client.get(player.getContext(), url, headers, requestParams, responseHandler);
        }
    }

    public void get(String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {
        String jwt = player.getJWT();
        if(jwt != null) {
            request("get", getAbsoluteUrl(url), null, params, responseHandler);
        } else {
            requestWithJWT("get", getAbsoluteUrl(url), null, params, responseHandler);
        }
    }

    /**
     * Post string body with JWT (stringentity can be json-data)
     * @param url
     * @param postBody
     * @param responseHandler
     */
    public void post(String url, StringEntity postBody, AsyncHttpResponseHandler responseHandler) {
        String jwt = player.getJWT();
        if(jwt != null) {
            request("post", getAbsoluteUrl(url), postBody, null, responseHandler);
        } else {
            requestWithJWT("post", getAbsoluteUrl(url), postBody, null, responseHandler);
        }
    }

    /**
     * Post params (ie. multipart) with JWT (stringentity can be json-data)
     * @param url
     * @param params
     * @param responseHandler
     */
    public void post(String url, RequestParams params,  AsyncHttpResponseHandler responseHandler) {
        String jwt = player.getJWT();
        if(jwt != null) {
            request("post", getAbsoluteUrl(url), null, params, responseHandler);
        } else {
            requestWithJWT("post", getAbsoluteUrl(url), null, params, responseHandler);
        }
    }

    private static String getAbsoluteUrl(String relativeUrl) {
        return BASE_URL + relativeUrl;
    }

    public void syncGame(final Game game) {
        if(game.remoteId != null)
            return;

        RequestParams params = new RequestParams();

        JSONObject j = new JSONObject();
        try {
            j.put("lvl_id", game.scenario.id);
            j.put("score", game.score);
            j.put("bonus", game.bonus);
            TimeZone tz = TimeZone.getTimeZone("UTC");
            DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
            df.setTimeZone(tz);
            j.put("time", df.format(game.time));
            j.put("lost_face_time", game.lostFaceTime);

            JSONArray jHits = new JSONArray();
            j.put("hits", jHits);

            for(Hit hit: game.hits.values()) {
                JSONObject jHit = new JSONObject();
                jHit.put("id", hit.id);
                jHit.put("target_index", hit.target.index);
                jHit.put("score", hit.score);
                jHit.put("bonus", hit.bonus);
                jHit.put("glasses", hit.glasses);
                jHit.put("ethnicity", hit.ethnicity);
                jHit.put("age", hit.age);
                jHit.put("gender", hit.gender);

                JSONObject jExpressions = new JSONObject();
                jHit.put("expressions", jExpressions);
                JSONObject jEmotions = new JSONObject();
                jHit.put("emotions", jEmotions);
                JSONObject jPoints = new JSONObject();
                jHit.put("points", jPoints);

                for(Expression e: Expression.values()) {
                    jExpressions.put(e.getDbName(), hit.expressions.get(e));
                }
                for(Emotion e: Emotion.values()) {
                    jEmotions.put(e.getDbName(), hit.emotions.get(e));
                }
                int i=0;
                for(PointF p: hit.points) {
                    JSONObject jPoint = new JSONObject();
                    jPoint.put("x", p.x);
                    jPoint.put("y", p.y);
                    jPoints.put(""+i, jPoint);
                    i++;
                }
                jHits.put(jHit);
            }


            JSONArray jAchievements = new JSONArray();
            j.put("achievements", jAchievements);
            for(Achievement achievement: game.achievements) {
                jAchievements.put(achievement.getId());
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }

        StringEntity postBody = null;

        try {
            postBody = new StringEntity(j.toString());
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        this.post("/games", postBody, new JsonHttpResponseHandler(){

            @Override
            public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
                Log.d("API",response.toString());
                GameOpenHelper gameHelper = new GameOpenHelper(player.getContext());
                // set remote ids on hits and game.
                try {
                    game.remoteId = response.getString("id");
                    JSONObject hits = response.getJSONObject("hits");
                    gameHelper.saveRemoteId(game);
                    for(Hit hit: game.hits.values()) {
                        hit.remoteId = hits.getString(Long.toString(hit.id));
                        gameHelper.saveRemoteId(hit);
                    }
                    // Achievement checking now in-game.
                    /*JSONArray jAchievements = response.getJSONArray("achievements");
                    if(jAchievements.length() > 0){
                        ArrayList<Achievement> achievements = new ArrayList<Achievement>(jAchievements.length());
                        for (int ai = 0; ai < jAchievements .length(); ai++) {
                            achievements.add(AchievementCollection.getInstance().get(jAchievements.getInt(ai)));
                        }
                        game.achievements = achievements;
                        gameHelper.saveAchievementsForGame(game);
                    }*/

                } catch (JSONException e) {
                    Log.e("API","Invalid data: " + response.toString());
                    e.printStackTrace();
                }
            }

            @Override
            public void onFailure(int statusCode, Header[] headers, String responseString, Throwable throwable) {
                handleOnFailure(statusCode, headers, responseString, throwable);
            }

            @Override
            public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject response) {
                onFailure(statusCode, headers, response == null ? null:response.toString(), throwable);
            }

        });
    }

    /**
     * 1. Cut out the essential parts of the image (privacy)
     * 2. send to server in one batch
     * 3. if successful, remove from device to save storage.
     * @param hits
     */
    public void sendHitImages(final Collection<Hit> hits) {
        // 1. Cut out the essential parts
        GameOpenHelper gameHelper = player.getGameOpenHelper();
        if(hits == null || hits.size() < 1) {
            return;
        }

        RequestParams params = new RequestParams();

        boolean noImages = true;

        for(Hit hit: hits) {
            Bitmap img = gameHelper.getImageForHit(hit);

            if(img == null) {
                Log.e("API", "no image for hit " + hit.id);
                continue;
            }

            noImages = false;

//          Crop: http://stackoverflow.com/a/31698091
            int margin = (int) ((hit.points[10].x - hit.points[5].x) * 0.05);
            int left = (int) (hit.points[5].x) - margin;
            int right = (int) (hit.points[10].x) + margin;
            int top = (int) (hit.points[6].y < hit.points[9].y ? hit.points[6].y : hit.points[9].y) - 2*margin; // a bit of forehead
            int bottom = (int) (hit.points[5].y > hit.points[10].y ? hit.points[5].y : hit.points[10].y) + margin;
            Rect rect = new Rect(left, top, right, bottom);
//          Be sure that there is at least 1px to slice.
            if(!(rect.left < rect.right && rect.top < rect.bottom)) {
                Log.e("API", "Error in point positions."+" left: " + rect.left + " right: " + rect.right + " top: " + rect.top + " bottom: " + rect.bottom );
                continue; // strange bug... skip it and drop the file anyway
            }
//          Create our resulting image (150--50),(75--25) = 200x100px
            Bitmap croppedBmp = Bitmap.createBitmap(rect.right-rect.left, rect.bottom-rect.top, Bitmap.Config.ARGB_8888);
//          draw source bitmap into resulting image at given position:
            new Canvas(croppedBmp).drawBitmap(img, -rect.left, -rect.top, null);

            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            croppedBmp.compress(Bitmap.CompressFormat.JPEG, 90, stream);
            byte[] imageBytes = stream.toByteArray();

            params.put(hit.remoteId + ":brows", new ByteArrayInputStream(imageBytes), hit.remoteId + "-brows.jpg", "image/jpeg");
            Log.v("API", "add param: " + hit.remoteId + ":brows - length:" + imageBytes.length );

//            NOSE
//          Crop: http://stackoverflow.com/a/31698091
            // reuse margin of brows
            left = (int) hit.points[13].x - margin;
            right = (int) hit.points[15].x + margin;
            top = (int) hit.points[11].y  - margin;
            bottom = (int) hit.points[14].y + margin;
            Rect rect2 = new Rect(left, top, right, bottom);
//          Be sure that there is at least 1px to slice.
            if(!(rect2.left < rect2.right && rect2.top < rect2.bottom)) {
                Log.e("API", "Error in point positions."+" left: " + rect2.left + " right: " + rect2.right + " top: " + rect2.top + " bottom: " + rect2.bottom );
                continue; // strange bug... skip it and drop the file anyway
            }
//          Create our resulting image (150--50),(75--25) = 200x100px
            croppedBmp = Bitmap.createBitmap(rect2.right-rect2.left, rect2.bottom-rect2.top, Bitmap.Config.ARGB_8888);
//          draw source bitmap into resulting image at given position:
            new Canvas(croppedBmp).drawBitmap(img, -rect2.left, -rect2.top, null);

            ByteArrayOutputStream stream2 = new ByteArrayOutputStream();
            croppedBmp.compress(Bitmap.CompressFormat.JPEG, 90, stream2);
            byte[] imageBytes2 = stream2.toByteArray();

            params.put(hit.remoteId + ":nose", new ByteArrayInputStream(imageBytes2), hit.remoteId + "-nose.jpg", "image/jpeg");
            Log.v("API", "add param: " + hit.remoteId + ":nose - length:" + imageBytes.length );

//          RIGHT MOUTH CORNER
//          Crop: http://stackoverflow.com/a/31698091
            // reuse margin of brows to make a square image
//            left = (int) hit.points[24].x - margin;
//            right = (int) hit.points[24].x + 3 * margin;
//            top = (int) hit.points[24].y  - 2 * margin;
//            bottom = (int) hit.points[24].y + 2 * margin;
//            Rect rect3 = new Rect(left, top, right, bottom);
////          Be sure that there is at least 1px to slice.
//            if(!(rect3.left < rect3.right && rect3.top < rect3.bottom)) {
//                Log.e("API", "Error in point positions."+" left: " + rect3.left + " right: " + rect3.right + " top: " + rect3.top + " bottom: " + rect3.bottom );
//                continue; // strange bug... skip it and drop the file anyway
//            }
//
//            croppedBmp = Bitmap.createBitmap(rect3.right-rect3.left, rect3.bottom-rect3.top, Bitmap.Config.ARGB_8888);
////          draw source bitmap into resulting image at given position:
//            new Canvas(croppedBmp).drawBitmap(img, -rect3.left, -rect3.top, null);
//
//            ByteArrayOutputStream stream3 = new ByteArrayOutputStream();
//            croppedBmp.compress(Bitmap.CompressFormat.JPEG, 90, stream3);
//            byte[] imageBytes3 = stream3.toByteArray();
//
//            params.put(hit.remoteId + ":mouth_right", new ByteArrayInputStream(imageBytes3), hit.remoteId + "-mouth_right.jpg", "image/jpeg");
//            Log.v("API", "add param: " + hit.remoteId + ":mouth_right - length:" + imageBytes.length );


//          LEFT MOUTH CORNER (doing whole mouth :-)
//          Crop: http://stackoverflow.com/a/31698091
            // reuse margin of brows to make a square image
            left = (int) hit.points[20].x - margin;
            right = (int) hit.points[24].x + margin;
            top = (int) (hit.points[21].y < hit.points[23].y ? hit.points[21].y : hit.points[23].y)  - margin;
            bottom = (int) hit.points[26].y + margin;
            Rect rect4 = new Rect(left, top, right, bottom);
//          Be sure that there is at least 1px to slice.
            if(!(rect4.left < rect4.right && rect4.top < rect4.bottom)) {
                Log.e("API", "Error in point positions."+" left: " + rect4.left + " right: " + rect4.right + " top: " + rect4.top + " bottom: " + rect4.bottom );
                continue; // strange bug... skip it and drop the file anyway
            }

            croppedBmp = Bitmap.createBitmap(rect4.right-rect4.left, rect4.bottom-rect4.top, Bitmap.Config.ARGB_8888);
//          draw source bitmap into resulting image at given position:
            new Canvas(croppedBmp).drawBitmap(img, -rect4.left, -rect4.top, null);

            ByteArrayOutputStream stream4 = new ByteArrayOutputStream();
            croppedBmp.compress(Bitmap.CompressFormat.JPEG, 90, stream4);
            byte[] imageBytes4 = stream4.toByteArray();

            params.put(hit.remoteId + ":mouth_left", new ByteArrayInputStream(imageBytes4), hit.remoteId + "-mouth_left.jpg", "image/jpeg");
            Log.v("API", "add param: " + hit.remoteId + ":mouth_left - length:" + imageBytes.length );
        }

        // don't post if there are no images
        // this happens ie. when images are all successfully send
        if(noImages) {
            return;
        }

        post("/images", params,new JsonHttpResponseHandler(){
            @Override
            public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
//                 3. remove images :-)
                for(Hit hit: hits) {
                    Log.v("API", "clear image for hit: "+ hit.id);
                    player.getGameOpenHelper().clearImageForHit(hit);
                }
            }

            @Override
            public void onFailure(int statusCode, Header[] headers, String responseString, Throwable throwable) {
                handleOnFailure(statusCode, headers, responseString, throwable);
            }

            @Override
            public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject response) {
                onFailure(statusCode, headers, response == null ? null:response.toString(), throwable);
            }
        });
    }

    public static void handleOnFailure(int statusCode, Header[] headers, String responseString, Throwable throwable) {
        Log.e("API", "FAILURE ON REQUEST!");
        Log.e("API", throwable.getMessage());
        Log.e("API", "Status: "+statusCode);
        if(headers == null){
            Log.e("API", "\tNULL");
        } else {
            for(Header header: headers) {
                Log.e("API", "\t" + header.getName() + ": " + header.getValue());
            }
        }
        Log.e("API", "Response:");
        if(responseString == null) {
            Log.e("API", "\tNULL!");
        }
        else {
            int maxLogSize = 1000;
            for(int i = 0; i <= responseString.length() / maxLogSize; i++) {
                int start = i * maxLogSize;
                int end = (i+1) * maxLogSize;
                end = end > responseString.length() ? responseString.length() : end;
                Log.e("API", responseString.substring(start, end));
            }
        }
    }
}