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package com.google.refine.expr.functions.date;

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import java.util.Date;
import java.util.Properties;
import java.util.TimeZone;

import org.slf4j.LoggerFactory;
import org.testng.Assert;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

import com.google.refine.RefineTest;
import com.google.refine.util.TestUtils;


public class DatePartTests extends RefineTest {

    static Properties bindings;
    
    @Override
    @BeforeTest
    public void init() {
        logger = LoggerFactory.getLogger(this.getClass());
    }
    
    private  DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd-HH:mm:ss.SSSSSSSSSX");
    
    @Test
    public void testOffsetDateTimeDatePart() {        
        // 2018-4-30 23:55:44
        OffsetDateTime source = OffsetDateTime.parse("20180430-23:55:44.000789000Z",
                formatter);
        
        // hours
        Assert.assertEquals(invoke("datePart", source, "hours"), 23);
        Assert.assertEquals(invoke("datePart", source, "hour"), 23);
        Assert.assertEquals(invoke("datePart", source, "h"), 23);
        
        // minutes
        Assert.assertEquals(invoke("datePart", source, "minutes"), 55);
        Assert.assertEquals(invoke("datePart", source, "minute"), 55);
        Assert.assertEquals(invoke("datePart", source, "min"), 55);
        
        // seconds
        Assert.assertEquals(invoke("datePart", source, "seconds"), 44);
        Assert.assertEquals(invoke("datePart", source, "sec"), 44);
        Assert.assertEquals(invoke("datePart", source, "s"), 44);
        
        // milliseconds
        Assert.assertEquals(invoke("datePart", source, "milliseconds"), 789);
        Assert.assertEquals(invoke("datePart", source, "ms"), 789);
        Assert.assertEquals(invoke("datePart", source, "S"), 789);
        
        // nanos
        Assert.assertEquals(invoke("datePart", source, "nanos"), 789000);
        Assert.assertEquals(invoke("datePart", source, "nano"), 789000);
        Assert.assertEquals(invoke("datePart", source, "n"), 789000);
        
        // years
        Assert.assertEquals(invoke("datePart", source, "years"), 2018);
        Assert.assertEquals(invoke("datePart", source, "year"), 2018);
        
        // months
        Assert.assertEquals(invoke("datePart", source, "months"), 4);
        Assert.assertEquals(invoke("datePart", source, "month"), 4);
        
        // weeks
        Assert.assertEquals(invoke("datePart", source, "weeks"), 5);
        Assert.assertEquals(invoke("datePart", source, "week"), 5);
        Assert.assertEquals(invoke("datePart", source, "w"), 5);
        
        // days, day, d
        Assert.assertEquals(invoke("datePart", source, "days"), 30);
        Assert.assertEquals(invoke("datePart", source, "day"), 30);
        Assert.assertEquals(invoke("datePart", source, "d"), 30);
        
        // weekday
        Assert.assertEquals(invoke("datePart", source, "weekday"), "MONDAY");
        
        // time
        Assert.assertEquals(invoke("datePart", source, "time"), 1525132544000l);
    }
    
    // Convert Date to Calendar
    private Calendar dateToCalendar(Date date) {
        Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
        calendar.setTime(date);
        return calendar;
    }
    
    @Test
    public void serializeDatePart() {
        String json = "{\"description\":\"Returns part of a date\",\"params\":\"date d, string part\",\"returns\":\"date\"}";
        TestUtils.isSerializedTo(new DatePart(), json);
    }

}
