package com.reactlibrary;

import com.facebook.react.bridge.WritableArray;
import com.facebook.react.bridge.WritableMap;
import com.facebook.react.bridge.WritableNativeArray;
import com.facebook.react.bridge.WritableNativeMap;

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

import java.util.Iterator;

import javax.annotation.Nullable;

/**
 * Created by alvin on 21/02/2017.
 */

public class RNUtils {

    @Nullable
    public static WritableMap jsonToWritableMap(JSONObject jsonObject) {
        WritableMap writableMap = new WritableNativeMap();

        if (jsonObject == null) {
            return null;
        }


        Iterator<String> iterator = jsonObject.keys();
        if (!iterator.hasNext()) {
            return null;
        }

        while (iterator.hasNext()) {
            String key = iterator.next();

            try {
                Object value = jsonObject.get(key);

                if (value == null) {
                    writableMap.putNull(key);
                } else if (value instanceof Boolean) {
                    writableMap.putBoolean(key, (Boolean) value);
                } else if (value instanceof Integer) {
                    writableMap.putInt(key, (Integer) value);
                } else if (value instanceof Double) {
                    writableMap.putDouble(key, (Double) value);
                } else if (value instanceof String) {
                    writableMap.putString(key, (String) value);
                } else if (value instanceof JSONObject) {
                    writableMap.putMap(key, jsonToWritableMap((JSONObject) value));
                } else if (value instanceof JSONArray) {
                    writableMap.putArray(key, jsonArrayToWritableArray((JSONArray) value));
                }
            } catch (JSONException ex) {
                // Do nothing and fail silently
            }
        }

        return writableMap;
    }

    @Nullable
    public static WritableArray jsonArrayToWritableArray(JSONArray jsonArray) {
        WritableArray writableArray = new WritableNativeArray();

        if (jsonArray == null) {
            return null;
        }

        if (jsonArray.length() <= 0) {
            return null;
        }

        for (int i = 0; i < jsonArray.length(); i++) {
            try {
                Object value = jsonArray.get(i);
                if (value == null) {
                    writableArray.pushNull();
                } else if (value instanceof Boolean) {
                    writableArray.pushBoolean((Boolean) value);
                } else if (value instanceof Integer) {
                    writableArray.pushInt((Integer) value);
                } else if (value instanceof Double) {
                    writableArray.pushDouble((Double) value);
                } else if (value instanceof String) {
                    writableArray.pushString((String) value);
                } else if (value instanceof JSONObject) {
                    writableArray.pushMap(jsonToWritableMap((JSONObject) value));
                } else if (value instanceof JSONArray) {
                    writableArray.pushArray(jsonArrayToWritableArray((JSONArray) value));
                }
            } catch (JSONException e) {
                // Do nothing and fail silently
            }
        }

        return writableArray;
    }

}