package com.mattrixwv.cipherstream.controller.polysubstitution;


import static org.junit.jupiter.api.Assertions.*;

import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.InjectMocks;
import org.mockito.junit.jupiter.MockitoExtension;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.mattrixwv.cipherstream.exception.InvalidCipherParameterException;
import com.mattrixwv.cipherstream.utils.CipherInfoUtil;
import com.mattrixwv.cipherstream.utils.CipherParameterUtil;


@Tag("unit-test")
@ExtendWith(MockitoExtension.class)
public class RailFenceControllerTest{
	@InjectMocks
	private RailFenceController railFenceController;
	//Fields
	private static final ObjectMapper mapper = new ObjectMapper();
	private static final String RAIL_FENCE_INPUT_STRING = "Message to^encode";
	private static final String RAIL_FENCE_OUTPUT_STRING = "Moetese ne^sgcdao";
	private static final int RAIL_FENCE_RAILS = 5;
	private static final ObjectNode blankNode = mapper.createObjectNode();


	@Test
	public void tetGetCipherInfo(){
		ObjectNode infoNode = CipherInfoUtil.buildInfoNode(CipherInfoUtil.RAIL_FENCE_CIPHER_NAME, CipherInfoUtil.RAIL_FENCE_CIPHER_DESCRIPTION);


		ObjectNode returnedJson = railFenceController.getCipherInfo();


		assertEquals(infoNode, returnedJson);
	}

	@Test
	public void testEncodeRailFence(){
		ObjectNode cipherParams = generateParams(RAIL_FENCE_RAILS, RAIL_FENCE_INPUT_STRING);


		ObjectNode returnedJson = railFenceController.encodeRailFence(cipherParams);


		assertEquals(cipherParams, returnedJson);
		assertEquals(RAIL_FENCE_OUTPUT_STRING, returnedJson.get(CipherParameterUtil.OUTPUT_STRING).asText());
	}

	@Test
	public void testEncodeRailFence_invalidParameters(){
		assertThrows(InvalidCipherParameterException.class, () -> {
			railFenceController.encodeRailFence(blankNode);
		});
	}

	@Test
	public void testDecodeRailFence(){
		ObjectNode cipherParams = generateParams(RAIL_FENCE_RAILS, RAIL_FENCE_OUTPUT_STRING);


		ObjectNode returnedJson = railFenceController.decodeRailFence(cipherParams);


		assertEquals(cipherParams, returnedJson);
		assertEquals(RAIL_FENCE_INPUT_STRING, returnedJson.get(CipherParameterUtil.OUTPUT_STRING).asText());
	}

	@Test
	public void testDecodeRailFence_invalidParameters(){
		assertThrows(InvalidCipherParameterException.class, () -> {
			railFenceController.encodeRailFence(blankNode);
		});
	}

	private ObjectNode generateParams(int rails, String inputString){
		ObjectNode cipherParams = mapper.createObjectNode();

		cipherParams.put(CipherParameterUtil.PRESERVE_CAPITALS, true);
		cipherParams.put(CipherParameterUtil.PRESERVE_WHITESPACE, true);
		cipherParams.put(CipherParameterUtil.PRESERVE_SYMBOLS, true);
		cipherParams.put(CipherParameterUtil.RAIL_FENCE_RAILS, rails);
		cipherParams.put(CipherParameterUtil.INPUT_STRING, inputString);

		return cipherParams;
	}
}