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/*
 * @author Constantin Chelban ([email protected])
 * Copyright (c) 2020 Salt Edge.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.saltedge.connector.sdk.tools;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.saltedge.connector.sdk.SDKConstants;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.jackson.io.JacksonSerializer;

import java.security.PrivateKey;
import java.time.Instant;
import java.time.temporal.ChronoUnit;
import java.util.Date;

public class JsonTools {
    /**
     * Creates mapper with deserialization option to fail on unknown property
     * and serialization option to skip NULL values
     *
     * @return Jackson's ObjectMapper
     */
    public static ObjectMapper createDefaultMapper() {
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        objectMapper.registerModule(new JavaTimeModule());
        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
        return objectMapper;
    }

    /**
     * Convert to JWT encoded and signed string for Authorization header
     *
     * @param requestData to encode
     * @param key RSA private key for signing
     * @return jwt string
     */
    public static String createAuthorizationHeaderValue(Object requestData, PrivateKey key) {
        if (key == null) return "";
        return "Bearer " + Jwts.builder()
                .serializeToJsonWith(new JacksonSerializer<>(createDefaultMapper()))
                .claim(SDKConstants.KEY_DATA, requestData)
                .signWith(key)
                .setExpiration(Date.from(Instant.now().plus(1, ChronoUnit.MINUTES)))
                .compact();
    }
}