package com.plannaplan.services;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.annotation.DirtiesContext;
import org.springframework.test.annotation.DirtiesContext.MethodMode;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;

import static org.junit.Assert.assertTrue;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.UUID;
import java.util.stream.IntStream;

import com.plannaplan.entities.Assignment;
import com.plannaplan.entities.Commision;
import com.plannaplan.entities.Groups;
import com.plannaplan.entities.User;
import com.plannaplan.types.UserRoles;
import com.plannaplan.types.WeekDay;

import org.junit.Ignore;
import org.junit.Test;

import org.junit.runner.RunWith;

@RunWith(SpringRunner.class)
@SpringBootTest
@ContextConfiguration
public class AssignmentServiceTest {

    @Autowired
    private AssignmentService service;
    @Autowired
    private CommisionService comServie;
    @Autowired
    private UserService userService;
    @Autowired
    private GroupService groupService;

    @Test
    public void shouldSaveAssignment() {
        final User user = new User("Gibi", "Kovalsky", "shouldSaveAssignment@assignmentservice.test",
                UserRoles.STUDENT);
        this.userService.save(user);

        long beginState = this.service.getAssignmentsAmmount();
        Commision com = new Commision(user);
        this.comServie.save(com);
        this.addAssignmentToCommision(com);
        assertTrue("Assign ammount should increase", this.service.getAssignmentsAmmount() > beginState);
    }

    @Test
    public void shouldGetCommisionAssignments() {
        final User user = new User("Gibi", "Kovalsky", "shouldGetCommisionAssignments@assignmentservice.test",
                UserRoles.STUDENT);
        this.userService.save(user);
        Commision com = new Commision(user);
        this.comServie.save(com);
        this.addAssignmentToCommision(com);

        final List<Assignment> response = this.service.getCommisionAssignments(com);
        assertTrue("Returned list size should be 1", response.size() == 1);
    }

    @Test
    @Ignore
    @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
    public void shouldPerformAcceptAlgorythm() {
        final Random generator = new Random();

        final List<Groups> groups = new ArrayList<>();

        IntStream.range(0, 418).forEach(i -> {
            groups.add(this.groupService.save(new Groups(generator.nextInt(80) + 20, null, null,
                    generator.nextInt(9) * 30 + 9 * 30, WeekDay.getDay(generator.nextInt(5)), null)));
        });

        IntStream.range(0, 1700).forEach(i -> {
            final User user = this.userService.save(new User(null, null,
                    "shouldPerformAcceptAlgorythm-" + UUID.randomUUID().toString() + "@AssignmentService.test", null,
                    UserRoles.STUDENT, generator.nextInt(400) + 100));
            final Commision com = this.comServie.save(new Commision(user));
            IntStream.range(0, 5).forEach(j -> {
                this.service.save(new Assignment(groups.get(generator.nextInt(groups.size())), com));
            });
        });
        this.service.callAcceptAlgorythm();
    }

    /**
     * This test will also sand a mail to users as a side effect. U can check them
     * in mailcater
     */
    @Test
    @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
    public void shouldNotAcceptForOnePerson() {
        final Random generator = new Random();
        final Groups group = this.groupService.save(new Groups(5, null, null, 840, WeekDay.MONDAY, null));

        IntStream.range(0, 6).forEach(i -> {
            final User user = this.userService.save(new User(null, null,
                    "shouldNotAcceptForOnePerson-" + UUID.randomUUID().toString() + "@AssignmentService.test", null,
                    UserRoles.STUDENT, generator.nextInt(400) + 100));

            final Commision com = this.comServie.save(new Commision(user));

            this.service.save(new Assignment(group, com));
        });

        this.service.callAcceptAlgorythm();

        final List<User> users = this.userService.getStudentsSortedByRanking();
        final User loser = users.get(users.size() - 1);

        assertTrue(loser.getStudentRegisteredGrups().size() == 0);

        users.forEach(u -> {
            final Commision com = this.comServie.getNewestCommision(u).get();
            final List<Assignment> assignments = com.getAssignments();
            if (u.getId() == loser.getId()) {
                assertTrue(!assignments.get(0).isAccepted());
            } else {
                assertTrue(assignments.get(0).isAccepted());
            }
        });

    }

    @Test
    @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
    public void shouldAcceptTwoTours() throws InterruptedException {
        final Groups group = this.groupService.save(new Groups(5, null, null, 840, WeekDay.MONDAY, null));
        final Groups group2 = this.groupService.save(new Groups(5, null, null, 840, WeekDay.MONDAY, null));

        User user = this.userService.save(new User(null, null,
                "shouldNotAcceptForOnePerson-" + UUID.randomUUID().toString() + "@AssignmentService.test", null,
                UserRoles.STUDENT, 234));

        final Commision com = this.comServie.save(new Commision(user));

        this.service.save(new Assignment(group, com));

        this.service.callAcceptAlgorythm();

        user = this.userService.getById(user.getId()).get();
        assertTrue(user.getStudentRegisteredGrups().size() == 1);

        this.service.save(new Assignment(group2, com));

        this.service.callAcceptAlgorythm();

        user = this.userService.getById(user.getId()).get();
        assertTrue(user.getStudentRegisteredGrups().size() == 2);

    }

    private void addAssignmentToCommision(Commision com) {
        Assignment a = new Assignment(null, com);
        this.service.save(a);
    }

}