package com.kodilla.testing.forum.statistics;
import org.junit.*;
import org.mockito.Mock;
import java.util.ArrayList;
import java.util.List;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class ForumStatisticsTestSuiteCustom1 {

    Statistics statisticsMockPostZero = mock(Statistics.class);
    Statistics statisticsMockPost1000 = mock(Statistics.class);
    Statistics statisticsMockCommentsZero = mock(Statistics.class);
    Statistics statisticsMockCommentsLessThanPosts = mock(Statistics.class);
    Statistics statisticsMockCommentsMoreThanPosts = mock(Statistics.class);
    Statistics getStatisticsMockUsersZero = mock(Statistics.class);
    Statistics getGetStatisticsMockUsers100 = mock(Statistics.class);
    ForumStatistics forumStatistics = new ForumStatistics();

    private ArrayList<String> createCustomSizeArray(int size){
        ArrayList<String> userNamesList = new ArrayList<>();
        for(int i=0; i<size; i++){
            userNamesList.add("User " + i);
        }
        return  userNamesList;
    }

    private void mockStatistics(Statistics statistics, List<String> userList, int commentsCount, int postCount){
        when(statistics.usersNames()).thenReturn(userList);
        when(statistics.commentsCount()).thenReturn(commentsCount);
        when(statistics.postsCount()).thenReturn(postCount);
    }

    @Before
    public void beforeTest() {
        mockStatistics(statisticsMockPostZero,createCustomSizeArray(5),15,0);
        mockStatistics(statisticsMockPost1000,createCustomSizeArray(5),15,1000);
        mockStatistics(statisticsMockCommentsZero,createCustomSizeArray(5),0,1000);
        mockStatistics(statisticsMockCommentsLessThanPosts,createCustomSizeArray(5),100,1000);
        mockStatistics(statisticsMockCommentsMoreThanPosts,createCustomSizeArray(5),1000,100);
        mockStatistics(getStatisticsMockUsersZero,createCustomSizeArray(0),15,100);
        mockStatistics(getGetStatisticsMockUsers100,createCustomSizeArray(100),15,1000);
    }

    @Test //gdy liczba postów = 0,
    public void testCalculateAdvStatisticsPostZero() {
        //When
        forumStatistics.calculateAdvStatistics(statisticsMockPostZero);
        //Then
        Assert.assertEquals(0, forumStatistics.getTotalPosts());
        Assert.assertEquals(new Double(0), forumStatistics.getPostPerUser(), 0);
        Assert.assertEquals(new Double(0), forumStatistics.getCommentsPerPost(), 0);

    }

    @Test //gdy liczba postów = 1000
    public void testCalculateAdvStatisticsPost1000() {
        //When
        forumStatistics.calculateAdvStatistics(statisticsMockPost1000);
        //Then
        Assert.assertEquals(1000, forumStatistics.getTotalPosts());
        Assert.assertEquals(new Double(200), forumStatistics.getPostPerUser(), 0);
        Assert.assertEquals(new Double(0.015), forumStatistics.getCommentsPerPost(), 0);
    }

    @Test //gdy liczba komentarzy = 0,
    public void testCalculateAdvStatisticsCommentsZero() {
        //When
        forumStatistics.calculateAdvStatistics(statisticsMockCommentsZero);
        //Then
        Assert.assertEquals(0, forumStatistics.getTotalComments());
        Assert.assertEquals(new Double(0), forumStatistics.getPostPerUser(), 0);
        Assert.assertEquals(new Double(0), forumStatistics.getCommentsPerPost(), 0);
    }

    @Test //gdy liczba komentarzy < liczba postów
    public void testCalculateAdvStatisticsCommentsLessThanPosts() {
        //When
        forumStatistics.calculateAdvStatistics(statisticsMockCommentsLessThanPosts);
        //Then
        Assert.assertEquals(100, forumStatistics.getTotalComments());
        Assert.assertEquals(1000, forumStatistics.getTotalPosts());
        Assert.assertEquals(new Double(20), forumStatistics.getCommentsPerUser(), 0);
        Assert.assertEquals(new Double(0.1), forumStatistics.getCommentsPerPost(), 0);
    }

    @Test //gdy liczba komentarzy > liczba postów,
    public void testCalculateAdvStatisticsCommentsMoreThanPosts() {
        //When
        forumStatistics.calculateAdvStatistics(statisticsMockCommentsMoreThanPosts);
        //Then
        Assert.assertEquals(1000, forumStatistics.getTotalComments());
        Assert.assertEquals(100, forumStatistics.getTotalPosts());
        Assert.assertEquals(new Double(200), forumStatistics.getCommentsPerUser(), 0);
        Assert.assertEquals(new Double(10), forumStatistics.getCommentsPerPost(), 0);
    }

    @Test //gdy liczba użytkowników = 0
    public void testCalculateAdvStatisticsUsersZero() {
        //When
        forumStatistics.calculateAdvStatistics(getStatisticsMockUsersZero);
        //Then
        Assert.assertEquals(0, forumStatistics.getTotalUsers());
        Assert.assertEquals(new Double(0), forumStatistics.getPostPerUser(), 0);
        Assert.assertEquals(new Double(0), forumStatistics.getCommentsPerUser(), 0);
    }

    @Test //gdy liczba użytkowników = 100
    public void testCalculateAdvStatisticsUsers100() {
        //When
        forumStatistics.calculateAdvStatistics(getGetStatisticsMockUsers100);
        //Then
        Assert.assertEquals(100, forumStatistics.getTotalUsers());
        Assert.assertEquals(new Double(10), forumStatistics.getPostPerUser(), 0);
        Assert.assertEquals(new Double(0.15), forumStatistics.getCommentsPerUser(), 0);
    }
}