package com.mattrixwv.cipherstream.controller.monosubstitution;


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

import java.util.List;

import org.junit.jupiter.api.BeforeEach;
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 org.springframework.test.util.ReflectionTestUtils;

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 SubstitutionCipherControllerTest{
	@InjectMocks
	private SubstitutionCipherController substitutionCipherController;
	//Fields
	private static final ObjectMapper mapper = new ObjectMapper();
	private static final ObjectNode blankNode = mapper.createObjectNode();
	private static final String SUBSTITUTION_KEYWORD = "cdefghijklmnopqrstuvwxyzab9876543210";
	private static final String SUBSTITUTION_INPUT_STRING = "Message to&encode 123";
	private static final String SUBSTITUTION_OUTPUT_STRING = "Oguucig vq&gpeqfg 876";
	private static final String substitutionName = "substitutionName";
	private static final String substitutionDescription = "substitutionDescription";
	private static final List<String> substitutionExplanation = List.of("substitutionExplanation1", "substitutionExplanation2", "substitutionExplanation3");
	private static final List<String> substitutionFacts = List.of("substitutionFact1", "substitutionFact2", "substitutionFact3");


	@BeforeEach
	public void setup(){
		ReflectionTestUtils.setField(substitutionCipherController, "substitutionName", substitutionName);
		ReflectionTestUtils.setField(substitutionCipherController, "substitutionDescription", substitutionDescription);
		ReflectionTestUtils.setField(substitutionCipherController, "substitutionExplanation", substitutionExplanation);
		ReflectionTestUtils.setField(substitutionCipherController, "substitutionFacts", substitutionFacts);
	}

	@Test
	public void tetGetCipherInfo(){
		ObjectNode infoNode = CipherInfoUtil.buildInfoNode(substitutionName, substitutionDescription, substitutionExplanation, substitutionFacts);


		ObjectNode returnedJson = substitutionCipherController.getCipherInfo();


		assertEquals(infoNode, returnedJson);
	}

	@Test
	public void testEncodeSubstitution(){
		ObjectNode cipherParams = generateParams(SUBSTITUTION_KEYWORD, SUBSTITUTION_INPUT_STRING);


		ObjectNode returnedJson = substitutionCipherController.encodeSubstitution(cipherParams);


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

	@Test
	public void testEncodeSubstitution_invalidParameters(){
		assertThrows(InvalidCipherParameterException.class, () -> {
			substitutionCipherController.encodeSubstitution(blankNode);
		});
	}

	@Test
	public void testDecodeSubstitution(){
		ObjectNode cipherParams = generateParams(SUBSTITUTION_KEYWORD, SUBSTITUTION_OUTPUT_STRING);


		ObjectNode returnedJson = substitutionCipherController.decodeSubstitution(cipherParams);


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

	@Test
	public void testDecodeSubstitution_invalidParameters(){
		assertThrows(InvalidCipherParameterException.class, () -> {
			substitutionCipherController.decodeSubstitution(blankNode);
		});
	}

	private ObjectNode generateParams(String keyword, 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.KEYWORD, keyword);
		cipherParams.put(CipherParameterUtil.INPUT_STRING, inputString);

		return cipherParams;
	}
}