package com.ufund.api.ufundapi.persistence;

import java.io.File;
import java.io.IOException;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.ufund.api.ufundapi.model.User;

@Tag("Persistence-tier")
public class UserFileDAOTest {
    UserFileDAO userFileDAO;
    User[] testUsers;
    ObjectMapper mockObjectMapper;

    @BeforeEach
    public void setupHeroFileDAO() throws IOException {
        mockObjectMapper = mock(ObjectMapper.class);
        testUsers = new User[3];
        testUsers[0] = new User("bob");
		testUsers[1] = new User("admin");
		testUsers[2] = new User("jelly12");

        // When the object mapper is supposed to read from the file
        // the mock object mapper will return the hero array above
        when(mockObjectMapper
            .readValue(new File("doesnt_matter.txt"),User[].class))
                .thenReturn(testUsers);
        userFileDAO = new UserFileDAO("doesnt_matter.txt",mockObjectMapper);
    }

    @Test
    public void getUsersTest() {
        User[] users = userFileDAO.getUsers();

        assertEquals(users.length,testUsers.length);
		
        for (int i = 0; i < testUsers.length;++i) {
			boolean isInArray = false;
            for (User user : testUsers) {
                if (users[i].getUsername().equals(user.getUsername())) {
                    isInArray = true;
                    break;
                }
			}
			assertTrue(isInArray);
		}
    }

    @Test
    public void findUsersTest() {
		User realUser1 = userFileDAO.getUser("bob");
		User realUser2 = userFileDAO.getUser("admin");

		assertEquals(testUsers[0], realUser1);
		assertEquals(testUsers[1], realUser2);
    }

	@Test
    public void findUsersNullTest() {
		User fakeUser = userFileDAO.getUser("phil.n.thropist");

		assertNull(fakeUser);
    }

	@Test
	public void createUserTest() throws IOException {
		User newUser = new User("keshey");
		userFileDAO.addUser(newUser);

		User actualUser = userFileDAO.getUser("keshey");
		assertNotNull(actualUser);

		assertEquals(actualUser.getUsername(), newUser.getUsername());
	}

	@Test
	public void deleteUserTest() throws IOException {
		User notDeletedUser = userFileDAO.getUser("jelly12");
		assertNotNull(notDeletedUser);

		boolean isDeleted = userFileDAO.deleteUser("jelly12");
		assertTrue(isDeleted);

		User deletedUser = userFileDAO.getUser("jelly12");
		assertNull(deletedUser);
	}

	@Test
	public void updateUserTest() throws IOException {
		User toBeUpdatedUser = userFileDAO.getUser("admin");
		assertNotNull(toBeUpdatedUser);

		User updatedUser = User.create("admin", "newPass");

		updatedUser = userFileDAO.updateUser(updatedUser);
		assertNotEquals(toBeUpdatedUser, updatedUser);
		assertEquals("admin", updatedUser.getUsername());
	}

}