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package org.zwobble.mammoth.tests.docx;

import org.junit.Test;
import org.zwobble.mammoth.internal.docx.Styles;
import org.zwobble.mammoth.internal.xml.XmlElement;

import java.util.Optional;

import static org.junit.Assert.assertEquals;
import static org.zwobble.mammoth.internal.docx.StylesXml.readStylesXmlElement;
import static org.zwobble.mammoth.internal.util.MammothLists.list;
import static org.zwobble.mammoth.internal.util.MammothMaps.map;
import static org.zwobble.mammoth.internal.xml.XmlNodes.element;

public class StylesXmlTests {
    @Test
    public void paragraphStyleIsNoneIfNoStyleWithThatIdExists() {
        XmlElement element = element("w:styles");

        Styles styles = readStylesXmlElement(element);

        assertEquals(Optional.empty(), styles.findParagraphStyleById("Heading1"));
    }

    @Test
    public void paragraphStyleCanBeFoundById() {
        XmlElement element = element("w:styles", list(
            element("w:style", map("w:type", "paragraph", "w:styleId", "Heading1"), list(
                nameElement("Heading 1")))));

        Styles styles = readStylesXmlElement(element);

        assertEquals(Optional.of("Heading 1"), styles.findParagraphStyleById("Heading1").get().getName());
    }

    @Test
    public void characterStyleCanBeFoundById() {
        XmlElement element = element("w:styles", list(
            element("w:style", map("w:type", "character", "w:styleId", "Heading1Char"), list(
                nameElement("Heading 1 Char")))));

        Styles styles = readStylesXmlElement(element);

        assertEquals(Optional.of("Heading 1 Char"), styles.findCharacterStyleById("Heading1Char").get().getName());
    }

    @Test
    public void paragraphAndCharacterStylesAreDistinct() {
        XmlElement element = element("w:styles", list(
            element("w:style", map("w:type", "paragraph", "w:styleId", "Heading1"), list(
                nameElement("Heading 1"))),
            element("w:style", map("w:type", "character", "w:styleId", "Heading1Char"), list(
                nameElement("Heading 1 Char")))));

        Styles styles = readStylesXmlElement(element);

        assertEquals(Optional.empty(), styles.findCharacterStyleById("Heading1"));
        assertEquals(Optional.empty(), styles.findParagraphStyleById("Heading1Char"));
    }

    @Test
    public void styleNameIsNoneIfNameElementDoesNotExist() {
        XmlElement element = element("w:styles", list(
            element("w:style", map("w:type", "paragraph", "w:styleId", "Heading1")),
            element("w:style", map("w:type", "character", "w:styleId", "Heading1Char"))));

        Styles styles = readStylesXmlElement(element);

        assertEquals(Optional.empty(), styles.findParagraphStyleById("Heading1").get().getName());
        assertEquals(Optional.empty(), styles.findCharacterStyleById("Heading1Char").get().getName());
    }

    private XmlElement nameElement(String name) {
        return element("w:name", map("w:val", name));
    }
}