var assert = require("assert");
var path = require("path");
var fs = require("fs");

var mammoth = require("../");
var promises = require("../lib/promises");

var testing = require("./testing");
var test = testing.test;
var testData = testing.testData;
var createFakeDocxFile = testing.createFakeDocxFile;


describe('mammoth', function() {
    test('should convert docx containing one paragraph to single p element', function() {
        var docxPath = path.join(__dirname, "test-data/single-paragraph.docx");
        return mammoth.convertToHtml({path: docxPath}).then(function(result) {
            assert.equal(result.value, "<p>Walking on imported air</p>");
            assert.deepEqual(result.messages, []);
        });
    });
    
    test('should convert docx represented by a Buffer', function() {
        var docxPath = path.join(__dirname, "test-data/single-paragraph.docx");
        return promises.nfcall(fs.readFile, docxPath)
            .then(function(buffer) {
                return mammoth.convertToHtml({buffer: buffer});
            })
            .then(function(result) {
                assert.equal(result.value, "<p>Walking on imported air</p>");
                assert.deepEqual(result.messages, []);
            });
    });
    
    test('should read docx xml files with unicode byte order mark', function() {
        var docxPath = path.join(__dirname, "test-data/utf8-bom.docx");
        return mammoth.convertToHtml({path: docxPath}).then(function (result) {
            assert.equal(result.value, "<p>This XML has a byte order mark.</p>");
            assert.deepEqual(result.messages, []);
        });
    });
    
    test('empty paragraphs are ignored by default', function() {
        var docxPath = path.join(__dirname, "test-data/empty.docx");
        return mammoth.convertToHtml({path: docxPath}).then(function(result) {
            assert.equal(result.value, "");
            assert.deepEqual(result.messages, []);
        });
    });
    
    test('empty paragraphs are preserved if ignoreEmptyParagraphs is false', function() {
        var docxPath = path.join(__dirname, "test-data/empty.docx");
        return mammoth.convertToHtml({path: docxPath}, {ignoreEmptyParagraphs: false}).then(function(result) {
            assert.equal(result.value, "<p></p>");
            assert.deepEqual(result.messages, []);
        });
    });
    
    test('style map can be expressed as string', function() {
        var docxFile = createFakeDocxFile({
            "word/document.xml": testData("simple/word/document.xml")
        });
        var options = {
            styleMap: "p => h1"
        };
        return mammoth.convertToHtml({file: docxFile}, options).then(function(result) {
            assert.equal("<h1>Hello.</h1>", result.value);
        });
    });
    
    test('style map can be expressed as array of style mappings', function() {
        var docxFile = createFakeDocxFile({
            "word/document.xml": testData("simple/word/document.xml")
        });
        var options = {
            styleMap: ["p => h1"]
        };
        return mammoth.convertToHtml({file: docxFile}, options).then(function(result) {
            assert.equal("<h1>Hello.</h1>", result.value);
        });
    });
    
    test('options are passed to document converter when calling mammoth.convertToHtml', function() {
        var docxFile = createFakeDocxFile({
            "word/document.xml": testData("simple/word/document.xml")
        });
        var options = {
            styleMap: "p => h1"
        };
        return mammoth.convertToHtml({file: docxFile}, options).then(function(result) {
            assert.equal("<h1>Hello.</h1>", result.value);
        });
    });
    
    test('options.transformDocument is used to transform document if set', function() {
        var docxFile = createFakeDocxFile({
            "word/document.xml": testData("simple/word/document.xml")
        });
        var options = {
            transformDocument: function(document) {
                document.children[0].styleId = "Heading1";
                return document;
            }
        };
        return mammoth.convertToHtml({file: docxFile}, options).then(function(result) {
            assert.equal("<h1>Hello.</h1>", result.value);
        });
    });
    
    test('mammoth.transforms.paragraph only transforms paragraphs', function() {
        var docxFile = createFakeDocxFile({
            "word/document.xml": testData("simple/word/document.xml")
        });
        var options = {
            transformDocument: mammoth.transforms.paragraph(function(paragraph) {
                paragraph.styleId = "Heading1";
                return paragraph;
            })
        };
        return mammoth.convertToHtml({file: docxFile}, options).then(function(result) {
            assert.equal("<h1>Hello.</h1>", result.value);
        });
    });
    
    test('inline images are included in output', function() {
        var docxPath = path.join(__dirname, "test-data/tiny-picture.docx");
        return mammoth.convertToHtml({path: docxPath}).then(function(result) {
            assert.equal(result.value, '<p><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAIAAAACUFjqAAAAAXNSR0IArs4c6QAAAAlwSFlzAAAOvgAADr4B6kKxwAAAABNJREFUKFNj/M+ADzDhlWUYqdIAQSwBE8U+X40AAAAASUVORK5CYII=" /></p>');
        });
    });
    
    test('src of inline images can be changed', function() {
        var docxPath = path.join(__dirname, "test-data/tiny-picture.docx");
        var convertImage = mammoth.images.inline(function(element) {
            return element.read("base64").then(function(encodedImage) {
                return {src: encodedImage.substring(0, 2) + "," + element.contentType};
            });
        });
        return mammoth.convertToHtml({path: docxPath}, {convertImage: convertImage}).then(function(result) {
            assert.equal(result.value, '<p><img src="iV,image/png" /></p>');
        });
    });
    
    test('simple list is converted to list elements', function() {
        var docxPath = path.join(__dirname, "test-data/simple-list.docx");
        return mammoth.convertToHtml({path: docxPath}).then(function(result) {
            assert.equal(result.value, '<ul><li>Apple</li><li>Banana</li></ul>');
        });
    });
    
    test('word tables are converted to html tables', function() {
        var docxPath = path.join(__dirname, "test-data/tables.docx");
        return mammoth.convertToHtml({path: docxPath}).then(function(result) {
            var expectedHtml = "<p>Above</p>" +
                "<table>" +
                "<tr><td><p>Top left</p></td><td><p>Top right</p></td></tr>" +
                "<tr><td><p>Bottom left</p></td><td><p>Bottom right</p></td></tr>" +
                "</table>" +
                "<p>Below</p>";
            assert.equal(result.value, expectedHtml);
            assert.deepEqual(result.messages, []);
        });
    });
    
    test('footnotes are appended to text', function() {
        // TODO: don't duplicate footnotes with multiple references
        var docxPath = path.join(__dirname, "test-data/footnotes.docx");
        var options = {
            idPrefix: "doc-42"
        };
        return mammoth.convertToHtml({path: docxPath}, options).then(function(result) {
            var expectedOutput = '<p>Ouch' +
                '<sup><a href="#doc-42-footnote-1" id="doc-42-footnote-ref-1">[1]</a></sup>.' +
                '<sup><a href="#doc-42-footnote-2" id="doc-42-footnote-ref-2">[2]</a></sup></p>' +
                '<ol><li id="doc-42-footnote-1"><p> A tachyon walks into a bar. <a href="#doc-42-footnote-ref-1">↑</a></p></li>' +
                '<li id="doc-42-footnote-2"><p> Fin. <a href="#doc-42-footnote-ref-2">↑</a></p></li></ol>';
            assert.equal(result.value, expectedOutput);
            assert.deepEqual(result.messages, []);
        });
    });
    
    test('endnotes are appended to text', function() {
        var docxPath = path.join(__dirname, "test-data/endnotes.docx");
        var options = {
            idPrefix: "doc-42"
        };
        return mammoth.convertToHtml({path: docxPath}, options).then(function(result) {
            var expectedOutput = '<p>Ouch' +
                '<sup><a href="#doc-42-endnote-2" id="doc-42-endnote-ref-2">[1]</a></sup>.' +
                '<sup><a href="#doc-42-endnote-3" id="doc-42-endnote-ref-3">[2]</a></sup></p>' +
                '<ol><li id="doc-42-endnote-2"><p> A tachyon walks into a bar. <a href="#doc-42-endnote-ref-2">↑</a></p></li>' +
                '<li id="doc-42-endnote-3"><p> Fin. <a href="#doc-42-endnote-ref-3">↑</a></p></li></ol>';
            assert.equal(result.value, expectedOutput);
            assert.deepEqual(result.messages, []);
        });
    });
    
    test('indentation is used if prettyPrint is true', function() {
        var docxPath = path.join(__dirname, "test-data/single-paragraph.docx");
        return mammoth.convertToHtml({path: docxPath}, {prettyPrint: true}).then(function(result) {
            assert.equal(result.value, "<p>\n  Walking on imported air\n</p>");
            assert.deepEqual(result.messages, []);
        });
    });
    
    test('using styleMapping throws error', function() {
        try {
            mammoth.styleMapping();
        } catch (error) {
            assert.equal(
                error.message,
                'Use a raw string instead of mammoth.styleMapping e.g. "p[style-name=\'Title\'] => h1" instead of mammoth.styleMapping("p[style-name=\'Title\'] => h1")'
            );
        }
    });
    
    test('can convert single paragraph to markdown', function() {
        var docxPath = path.join(__dirname, "test-data/single-paragraph.docx");
        return mammoth.convertToMarkdown({path: docxPath}).then(function(result) {
            assert.equal(result.value, "Walking on imported air\n\n");
            assert.deepEqual(result.messages, []);
        });
    });

    test('extractRawText only retains raw text', function() {
        var docxPath = path.join(__dirname, "test-data/simple-list.docx");
        return mammoth.extractRawText({path: docxPath}).then(function(result) {
            assert.equal(result.value, 'Apple\n\nBanana\n\n');
        });
    });
    
    test('extractRawText can use .docx files represented by a Buffer', function() {
        var docxPath = path.join(__dirname, "test-data/single-paragraph.docx");
        return promises.nfcall(fs.readFile, docxPath)
            .then(function(buffer) {
                return mammoth.extractRawText({buffer: buffer});
            })
            .then(function(result) {
                assert.equal(result.value, "Walking on imported air\n\n");
                assert.deepEqual(result.messages, []);
            });
    });
});