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

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;

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.expr.EvalError;
import com.google.refine.util.TestUtils;


public class IncTests extends RefineTest {
    private  DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd-HH:mm:ss.SSSSSSSSSX");
    
    @Override
    @BeforeTest
    public void init() {
        logger = LoggerFactory.getLogger(this.getClass());
    }

    @Test
    public void testInc() {        
        OffsetDateTime source = OffsetDateTime.parse("20180510-23:55:44.000789000Z",
                formatter);
        
        // add hours
        Assert.assertTrue(invoke("inc",  source, 2, "hours") instanceof OffsetDateTime);
        Assert.assertEquals(invoke("inc",  source, 2, "hours"), source.plus(2, ChronoUnit.HOURS));
        Assert.assertEquals(invoke("inc",  source, 2, "hour"), source.plus(2, ChronoUnit.HOURS));
        Assert.assertEquals(invoke("inc",  source, 2, "h"), source.plus(2, ChronoUnit.HOURS));
        
        // add years
        Assert.assertTrue(invoke("inc",  source, 2, "year") instanceof OffsetDateTime);
        Assert.assertEquals(invoke("inc",  source, 2, "years"), source.plus(2, ChronoUnit.YEARS));
        Assert.assertEquals(invoke("inc",  source, 2, "year"), source.plus(2, ChronoUnit.YEARS));
        
        // add months
        Assert.assertTrue(invoke("inc",  source, 2, "months") instanceof OffsetDateTime);
        Assert.assertEquals(invoke("inc",  source, 2, "months"), source.plus(2, ChronoUnit.MONTHS));
        Assert.assertEquals(invoke("inc",  source, 2, "month"), source.plus(2, ChronoUnit.MONTHS));
        
        // add minutes
        Assert.assertTrue(invoke("inc",  source, 2, "minutes") instanceof OffsetDateTime);
        Assert.assertEquals(invoke("inc",  source, 2, "minutes"), source.plus(2, ChronoUnit.MINUTES));
        Assert.assertEquals(invoke("inc",  source, 2, "minute"), source.plus(2, ChronoUnit.MINUTES));
        Assert.assertEquals(invoke("inc",  source, 2, "min"), source.plus(2, ChronoUnit.MINUTES));
        
        // add weeks
        Assert.assertTrue(invoke("inc",  source, 2, "weeks") instanceof OffsetDateTime);
        Assert.assertEquals(invoke("inc",  source, 2, "weeks"), source.plus(2, ChronoUnit.WEEKS));
        Assert.assertEquals(invoke("inc",  source, 2, "week"), source.plus(2, ChronoUnit.WEEKS));
        Assert.assertEquals(invoke("inc",  source, 2, "w"), source.plus(2, ChronoUnit.WEEKS));
        
        // add seconds
        Assert.assertTrue(invoke("inc",  source, 2, "seconds") instanceof OffsetDateTime);
        Assert.assertEquals(invoke("inc",  source, 2, "seconds"), source.plus(2, ChronoUnit.SECONDS));
        Assert.assertEquals(invoke("inc",  source, 2, "sec"), source.plus(2, ChronoUnit.SECONDS));
        Assert.assertEquals(invoke("inc",  source, 2, "s"), source.plus(2, ChronoUnit.SECONDS));
        
        // add milliseconds
        Assert.assertTrue(invoke("inc",  source, 2, "milliseconds") instanceof OffsetDateTime);
        Assert.assertEquals(invoke("inc",  source, 2, "milliseconds"), source.plus(2, ChronoUnit.MILLIS));
        Assert.assertEquals(invoke("inc",  source, 2, "ms"), source.plus(2, ChronoUnit.MILLIS));
        Assert.assertEquals(invoke("inc",  source, 2, "S"), source.plus(2, ChronoUnit.MILLIS));
        
        // add nanos
        Assert.assertTrue(invoke("inc",  source, 2, "nanos") instanceof OffsetDateTime);
        Assert.assertEquals(invoke("inc",  source, 2, "nanos"), source.plus(2, ChronoUnit.NANOS));
        Assert.assertEquals(invoke("inc",  source, 2, "nano"), source.plus(2, ChronoUnit.NANOS));
        Assert.assertEquals(invoke("inc",  source, 2, "n"), source.plus(2, ChronoUnit.NANOS));
        
        // exception
        Assert.assertTrue(invoke("inc", source, 99) instanceof EvalError);
        Assert.assertTrue(invoke("inc", source.toInstant().toEpochMilli(), 99, "h") instanceof EvalError);
    }
    
    @Test
    public void serializeInc() {
        String json = "{\"description\":\"Returns a date changed by the given amount in the given unit of time\",\"params\":\"date d, number value, string unit (default to 'hour')\",\"returns\":\"date\"}";
        TestUtils.isSerializedTo(new Inc(), json);
    }

}
