/*
 * Copyright (C) 2017/2021 e-voyageurs technologies
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ai.tock.duckling.client

import io.vertx.core.json.JsonArray
import io.vertx.core.json.JsonObject

internal class JSONValue(val value: Any?) {

    companion object {
        val NULL_VALUE = JSONValue(null)
    }

    operator fun get(i: Int): JSONValue = if (isNull()) NULL_VALUE else if (value is JsonArray) JSONValue(value.getValue(i)) else throw IllegalArgumentException("supported only for array but is $value")

    operator fun get(name: String): JSONValue = if (isNull()) NULL_VALUE else if (value is JsonObject) JSONValue(value.getValue(name)) else if (value is Map<*, *>) JSONValue(value.get(name)) else throw IllegalArgumentException("supported only for map but is $value")

    fun string(): String = value.toString()

    fun int(): Int = value as Int

    fun number(): Number = value as Number

    fun array(): JsonArray = value as JsonArray

    fun isEmpty(): Boolean = (value as JsonArray).isEmpty

    fun isNull(): Boolean = value == null

    fun isNotNull(): Boolean = value != null

    fun iterable(): Iterable<JSONValue> = (value as JsonArray).list.map { JSONValue(it) }

    override fun toString(): String = string()
}
