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package org.glassfish.json;

import org.glassfish.json.api.BufferPool;

import javax.json.JsonArrayBuilder;
import javax.json.JsonObjectBuilder;
import javax.json.JsonValue;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Collection;
import java.util.Map;

/**
 * Util for transforming a Map to a Json objects.
 *
 * @author asotobu
 */
public final class MapUtil {

    private MapUtil() {
        super();
    }

    static JsonValue handle(Object value, BufferPool bufferPool) {

        if (value == null) {
            return JsonValue.NULL;
        }

        if (value instanceof BigDecimal) {
            return JsonNumberImpl.getJsonNumber((BigDecimal) value);
        } else {
            if (value instanceof BigInteger) {
                return JsonNumberImpl.getJsonNumber((BigInteger) value);
            } else {
                if ( value instanceof Boolean) {
                    Boolean b = (Boolean) value;
                    return b ? JsonValue.TRUE : JsonValue.FALSE;
                } else {
                    if (value instanceof Double) {
                        return JsonNumberImpl.getJsonNumber((Double) value);
                    } else {
                        if (value instanceof Integer) {
                            return JsonNumberImpl.getJsonNumber((Integer) value);
                        } else {
                            if (value instanceof Long) {
                                return JsonNumberImpl.getJsonNumber((Long) value);
                            } else {
                                if (value instanceof String) {
                                    return new JsonStringImpl((String) value);
                                } else {
                                    if (value instanceof Collection) {
                                        @SuppressWarnings("unchecked")
                                        Collection<?> collection = (Collection<?>) value;
                                        JsonArrayBuilder jsonArrayBuilder = new JsonArrayBuilderImpl(collection, bufferPool);
                                        return jsonArrayBuilder.build();
                                    } else {
                                        if (value instanceof Map) {
                                            @SuppressWarnings("unchecked")
                                            JsonObjectBuilder object = new JsonObjectBuilderImpl((Map<String, Object>) value, bufferPool);
                                            return object.build();
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }

        throw new IllegalArgumentException(String.format("Type %s is not supported.", value.getClass()));
    }

}