/*

Copyright 2018, Owen Stephens
All rights reserved.

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modification, are permitted provided that the following conditions are
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    * Redistributions of source code must retain the above copyright
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    * Redistributions in binary form must reproduce the above
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,           
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*/

package com.google.refine.browsing.util;

import java.io.IOException;
import java.io.Serializable;
import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Properties;

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

import com.google.refine.RefineTest;
import com.google.refine.expr.Evaluable;
import com.google.refine.model.Cell;
import com.google.refine.model.ModelException;
import com.google.refine.model.Project;
import com.google.refine.model.Record;
import com.google.refine.model.Row;

public class ExpressionNominalValueGrouperTests extends RefineTest {

    // dependencies
    // Variables
    private static Project project;
    private static Properties bindings;

    private static OffsetDateTime dateTimeValue = OffsetDateTime.parse("2017-05-12T05:45:00+00:00", DateTimeFormatter.ISO_OFFSET_DATE_TIME);
    private static String dateTimeStringValue = "2017-05-12T05:45:00Z";
    private static int integerValue = 1;
    private static String integerStringValue = "1";
    private static String stringStringValue = "a";

    private static ExpressionNominalValueGrouper grouper;
    private static Evaluable eval = new Evaluable() {

        @Override
        public Object evaluate(Properties bindings) {
            return bindings.get("value");
        }

        @Override
        public String getSource() {
            return "value";
        }

        @Override
        public String getLanguagePrefix() {
            return "grel";
        }

    };
    private static final int cellIndex = 0;
    private static final String columnName = "Col1";
    private static final int numberOfRows = 5;
    private static final String projectName = "ExpressionNominalValueGrouper";

    @Override
    @BeforeTest
    public void init() {
        logger = LoggerFactory.getLogger(this.getClass());
    }

    @BeforeMethod
    public void setUp() throws IOException, ModelException {
        project = createProjectWithColumns(projectName, columnName);
        bindings = new Properties();
        bindings.put("project", project);
    }

    @AfterMethod
    public void tearDown() {
        project = null;
    }

    @Test
    public void expressionNominalValueGrouperStrings() throws Exception {
        // populate project
        // Five rows of a's
        for (int i = 0; i < numberOfRows; i++) {
            Row row = new Row(1);
            row.setCell(0, new Cell(stringStringValue, null));
            project.rows.add(row);
        }
        // create grouper
        grouper = new ExpressionNominalValueGrouper(eval, columnName, cellIndex);
        try {
            grouper.start(project);
            for (int rowIndex = 0; rowIndex < numberOfRows; rowIndex++) {
                Row row = project.rows.get(rowIndex);
                grouper.visit(project, rowIndex, rowIndex, row);
            }
        } finally {
            grouper.end(project);
        }

        Assert.assertEquals(grouper.choices.size(), 1);

        Assert.assertTrue(grouper.choices.containsKey(stringStringValue));
        Assert.assertEquals(grouper.choices.get(stringStringValue).decoratedValue.label, stringStringValue);
        Assert.assertEquals(grouper.choices.get(stringStringValue).decoratedValue.value.toString(), stringStringValue);
    }

    @Test
    public void expressionNominalValueGrouperInts() throws Exception {
        // populate project
        for (int i = 0; i < numberOfRows; i++) {
            Row row = new Row(1);
            row.setCell(0, new Cell(integerValue, null));
            project.rows.add(row);
        }
        // create grouper
        grouper = new ExpressionNominalValueGrouper(eval, columnName, cellIndex);
        try {
            grouper.start(project);
            for (int rowIndex = 0; rowIndex < numberOfRows; rowIndex++) {
                Row row = project.rows.get(rowIndex);
                grouper.visit(project, rowIndex, rowIndex, row);
            }
        } finally {
            grouper.end(project);
        }

        Assert.assertEquals(grouper.choices.size(), 1);

        Assert.assertTrue(grouper.choices.containsKey(integerStringValue));
        Assert.assertEquals(grouper.choices.get(integerStringValue).decoratedValue.label, integerStringValue);
        Assert.assertEquals(grouper.choices.get(integerStringValue).decoratedValue.value.toString(), integerStringValue);
    }

    @Test
    public void expressionNominalValueGrouperDates() throws Exception {
        // populate project
        for (int i = 0; i < numberOfRows; i++) {
            Row row = new Row(1);
            row.setCell(0, new Cell(dateTimeValue, null));
            project.rows.add(row);
        }
        // create grouper
        grouper = new ExpressionNominalValueGrouper(eval, columnName, cellIndex);
        try {
            grouper.start(project);
            for (int rowIndex = 0; rowIndex < numberOfRows; rowIndex++) {
                Row row = project.rows.get(rowIndex);
                grouper.visit(project, rowIndex, rowIndex, row);
            }
        } finally {
            grouper.end(project);
        }

        Assert.assertEquals(grouper.choices.size(), 1);

        Assert.assertTrue(grouper.choices.containsKey(dateTimeStringValue));
        Assert.assertEquals(grouper.choices.get(dateTimeStringValue).decoratedValue.label, dateTimeStringValue);
        Assert.assertEquals(grouper.choices.get(dateTimeStringValue).decoratedValue.value.toString(), dateTimeStringValue);
    }

    @Test
    public void expressionNominalValueGrouperRecords() throws Exception {
        project = createProject(
                new String[] { "col1", "col2", "col3" },
                new Serializable[][] {
                        { "record1", "1", "a" },
                        { null, null, "a" },
                        { null, null, "a" },
                        { "record2", null, "a" },
                        { null, "1", "a" }
                });
        bindings = new Properties();
        bindings.put("project", project);

        grouper = new ExpressionNominalValueGrouper(eval, "col2", 1);
        try {
            grouper.start(project);
            int c = project.recordModel.getRecordCount();
            for (int r = 0; r < c; r++) {
                Record record = project.recordModel.getRecord(r);
                grouper.visit(project, record.fromRowIndex, record);
            }
        } finally {
            grouper.end(project);
        }

        Assert.assertEquals(grouper.blankCount, 3);
        Assert.assertEquals(grouper.choices.size(), 1);
        Assert.assertTrue(grouper.choices.containsKey(integerStringValue));
        Assert.assertEquals(grouper.choices.get(integerStringValue).count, 2);
    }
}
