package com.mattrixwv.cipherstream.controller.polysubstitution;


import org.slf4j.MDC;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.mattrixwv.cipherstream.aspect.CipherStreamLoggingAspect;
import com.mattrixwv.cipherstream.polysubstitution.Hill;
import com.mattrixwv.cipherstream.utils.CipherInfoUtil;
import com.mattrixwv.cipherstream.utils.CipherParameterUtil;

import lombok.extern.slf4j.Slf4j;


@Slf4j
@RestController
@RequestMapping("/cipherStream/hill")
public class HillCipherController{
	@GetMapping
	public ObjectNode getCipherInfo(){
		MDC.put(CipherStreamLoggingAspect.CIPHER_NAME_LOGGING, CipherInfoUtil.HILL_CIPHER_NAME);
		log.info("Getting info for {}", CipherInfoUtil.HILL_CIPHER_NAME);


		return CipherInfoUtil.buildInfoNode(CipherInfoUtil.HILL_CIPHER_NAME, CipherInfoUtil.HILL_CIPHER_DESCRIPTION);
	}

	@GetMapping("/encode")
	public ObjectNode encodeHill(@RequestBody ObjectNode cipherParams) throws JsonProcessingException{
		MDC.put(CipherStreamLoggingAspect.CIPHER_NAME_LOGGING, CipherInfoUtil.HILL_CIPHER_NAME);
		log.info("Encoding {}", CipherInfoUtil.HILL_CIPHER_NAME);


		CipherParameterUtil.verifyHillParams(cipherParams);
		boolean preserveCapitals = cipherParams.get(CipherParameterUtil.PRESERVE_CAPITALS).asBoolean();
		boolean preserveWhitespace = cipherParams.get(CipherParameterUtil.PRESERVE_WHITESPACE).asBoolean();
		boolean preserveSymbols = cipherParams.get(CipherParameterUtil.PRESERVE_SYMBOLS).asBoolean();
		int[][] key = new ObjectMapper().treeToValue(cipherParams.get(CipherParameterUtil.HILL_KEY), int[][].class);
		String inputString = cipherParams.get(CipherParameterUtil.INPUT_STRING).asText();


		Hill hill = new Hill(preserveCapitals, preserveWhitespace, preserveSymbols);
		String outputString = hill.encode(key, inputString);

		cipherParams.put(CipherParameterUtil.OUTPUT_STRING, outputString);


		return cipherParams;
	}

	@GetMapping("/decode")
	public ObjectNode decodeHill(@RequestBody ObjectNode cipherParams) throws JsonProcessingException{
		MDC.put(CipherStreamLoggingAspect.CIPHER_NAME_LOGGING, CipherInfoUtil.HILL_CIPHER_NAME);
		log.info("Decoding {}", CipherInfoUtil.HILL_CIPHER_NAME);


		CipherParameterUtil.verifyHillParams(cipherParams);
		boolean preserveCapitals = cipherParams.get(CipherParameterUtil.PRESERVE_CAPITALS).asBoolean();
		boolean preserveWhitespace = cipherParams.get(CipherParameterUtil.PRESERVE_WHITESPACE).asBoolean();
		boolean preserveSymbols = cipherParams.get(CipherParameterUtil.PRESERVE_SYMBOLS).asBoolean();
		int[][] key = new ObjectMapper().treeToValue(cipherParams.get(CipherParameterUtil.HILL_KEY), int[][].class);
		String inputString = cipherParams.get(CipherParameterUtil.INPUT_STRING).asText();


		Hill hill = new Hill(preserveCapitals, preserveWhitespace, preserveSymbols);
		String outputString = hill.decode(key, inputString);

		cipherParams.put(CipherParameterUtil.OUTPUT_STRING, outputString);


		return cipherParams;
	}
}