import assert from 'assert';
import EpubCFI from '../src/epubcfi.js';
// var fs = require('fs');
if (typeof DOMParser === "undefined") {
	global.DOMParser = require('xmldom').DOMParser;
}

describe('EpubCFI', function() {

	it('parse a cfi on init', function() {
		var cfi = new EpubCFI("epubcfi(/6/2[cover]!/6)");

		assert.equal( cfi.spinePos, 0, "spinePos is parsed as the first item" );
	});

	it('parse a cfi and ignore the base if present', function() {
		var cfi = new EpubCFI("epubcfi(/6/2[cover]!/6)", "/6/6[end]");

		assert.equal( cfi.spinePos, 0, "base is ignored and spinePos is parsed as the first item" );
	});

	describe('#parse()', function() {
		var cfi = new EpubCFI();

		it('parse a cfi on init', function() {
			var parsed = cfi.parse("epubcfi(/6/2[cover]!/6)");

			assert.equal( parsed.spinePos, 0, "spinePos is parsed as the first item" );
		});

		it('parse a cfi and ignore the base if present', function() {
			var parsed = cfi.parse("epubcfi(/6/2[cover]!/6)", "/6/6[end]");

			assert.equal( parsed.spinePos, 0, "base is ignored and spinePos is parsed as the first item" );
		});

		it('parse a cfi with a charecter offset', function() {
			var parsed = cfi.parse("epubcfi(/6/4[chap01ref]!/4[body01]/10[para05]/2/1:3)");

			assert.equal( parsed.path.terminal.offset, 3, "Path has a terminal offset of 3" );
		});

		it('parse a cfi with a range', function() {
			var parsed = cfi.parse("epubcfi(/6/4[chap01ref]!/4[body01]/10[para05],/2/1:1,/3:4)");

			assert.equal( parsed.range, true, "Range is true" );
			assert.equal( parsed.start.steps.length, 2, "Start steps are present" );
			assert.equal( parsed.end.steps.length, 1, "End steps are present" );
			assert.equal( parsed.start.terminal.offset, 1, "Start has a terminal offset of 1" );
			assert.equal( parsed.end.terminal.offset, 4, "End has a terminal offset of 4" );

		});

	});

	describe('#toString()', function() {
		it('parse a cfi and write it back', function() {

			assert.equal(new EpubCFI("epubcfi(/6/2[cover]!/6)").toString(), "epubcfi(/6/2[cover]!/6)", "output cfi string is same as input" );
			assert.equal(new EpubCFI("epubcfi(/6/4[chap01ref]!/4[body01]/10[para05]/2/1:3)").toString(), "epubcfi(/6/4[chap01ref]!/4[body01]/10[para05]/2/1:3)", "output cfi string is same as input" );
			assert.equal(new EpubCFI("epubcfi(/6/4[chap01ref]!/4[body01]/10[para05],/2/1:1,/3:4)").toString(), "epubcfi(/6/4[chap01ref]!/4[body01]/10[para05],/2/1:1,/3:4)", "output cfi string is same as input" );

		});
	});

	describe('#checkType()', function() {
		it('determine the type of a cfi string', function() {
			var cfi = new EpubCFI();

			assert.equal( cfi.checkType('epubcfi(/6/2[cover]!/6)'), 'string' );
			assert.equal( cfi.checkType('/6/2[cover]!/6'), false );

		});

		it('determine the type of a cfi', function() {
			var ogcfi = new EpubCFI("epubcfi(/6/4[chap01ref]!/4[body01]/10[para05]/2/1:3)");
			var cfi = new EpubCFI();

			assert.equal( cfi.checkType(ogcfi), 'EpubCFI' );

		});

		it('determine the type of a node', function() {
			var cfi = new EpubCFI();
			var el = document.createElement('div');

			assert.equal( cfi.checkType(el), 'node' );

		});

		it('determine the type of a range', function() {
			var cfi = new EpubCFI();
			var range = document.createRange();

			assert.equal( cfi.checkType(range), 'range' );

		});

	});

	describe('#compare()', function() {
		it('compare CFIs', function() {
			var epubcfi = new EpubCFI();

			// Spines
			assert.equal(epubcfi.compare("epubcfi(/6/4[cover]!/4)", "epubcfi(/6/2[cover]!/4)"), 1, "First spine is greater");
			assert.equal(epubcfi.compare("epubcfi(/6/4[cover]!/4)", "epubcfi(/6/6[cover]!/4)"), -1, "Second spine is greater");

			// First is deeper
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/8/2)", "epubcfi(/6/2[cover]!/6)"), 1, "First Element is after Second");
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/4/2)", "epubcfi(/6/2[cover]!/6)"), -1, "First Element is before Second");

			// Second is deeper
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/8/2)", "epubcfi(/6/2[cover]!/6/4/2/2)"), 1, "First Element is after Second");
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/4/4)", "epubcfi(/6/2[cover]!/6/4/2/2)"), -1, "First Element is before Second");
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/4/6)", "epubcfi(/6/2[cover]!/4/6/8/1:0)"), -1, "First is less specific, so is before Second");

			// Same Depth
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/6/8)", "epubcfi(/6/2[cover]!/6/2)"), 1, "First Element is after Second");
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/4/20)", "epubcfi(/6/2[cover]!/6/10)"), -1, "First Element is before Second");

			// Text nodes
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/4/5)", "epubcfi(/6/2[cover]!/4/3)"), 1, "First TextNode is after Second");
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/4/7)", "epubcfi(/6/2[cover]!/4/13)"), -1, "First TextNode is before Second");

			// Char offset
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/4/5:1)", "epubcfi(/6/2[cover]!/4/5:0)"), 1, "First Char Offset after Second");
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/4/5:2)", "epubcfi(/6/2[cover]!/4/5:30)"), -1, "Second Char Offset before Second");

			// Normal example
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/4/8/5:1)", "epubcfi(/6/2[cover]!/4/6/15:2)"), 1, "First Element after Second");
			assert.equal(epubcfi.compare("epubcfi(/6/2[cover]!/4/8/1:0)", "epubcfi(/6/2[cover]!/4/8/1:0)"), 0, "All Equal");

			// Different Lengths
			assert.equal(epubcfi.compare(
				'epubcfi(/6/16[id42]!/4[5N3C0-8c483216e03a4ff49927fc1a97dc7b2c]/10/1:317)',
				'epubcfi(/6/16[id42]!/4[5N3C0-8c483216e03a4ff49927fc1a97dc7b2c]/10/2[page18]/1:0)'
			), -1, "First CFI is before Second");
			assert.equal(epubcfi.compare(
				'epubcfi(/6/16[id42]!/4[5N3C0-8c483216e03a4ff49927fc1a97dc7b2c]/12/1:0)',
				'epubcfi(/6/16[id42]!/4[5N3C0-8c483216e03a4ff49927fc1a97dc7b2c]/12/2/1:9)'
			), -1, "First CFI is before Second");
			assert.equal(epubcfi.compare(
				'epubcfi(/6/16!/4/12/1:0)',
				'epubcfi(/6/16!/4/12/2/1:9)'
			), -1, "First CFI is before Second");


		});
	});

	describe('#fromNode()', function() {
		var base = "/6/4[chap01ref]";
		// var contents = fs.readFileSync(__dirname + '/fixtures/chapter1-highlights.xhtml', 'utf8');
		var contents = require('./fixtures/chapter1-highlights.xhtml').default;

		// var serializer = new XMLSerializer();
		// var doc = serializer.serializeToString(contents);
		var doc = new DOMParser().parseFromString(contents, "application/xhtml+xml");

		it('get a cfi from a p node', function() {
			var span = doc.getElementById('c001p0004');
			var cfi = new EpubCFI(span, base);

			assert.equal(span.nodeType, Node.ELEMENT_NODE, "provided a element node");
			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/10/2[c001p0004])" );

		});

		it('get a cfi from a text node', function() {
			var t = doc.getElementById('c001p0004').childNodes[0];
			var cfi = new EpubCFI(t, base);

			assert.equal(t.nodeType, Node.TEXT_NODE, "provided a text node");
			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/10/2[c001p0004]/1)" );


		});

		it('get a cfi from a text node inside a highlight', function() {
			var t = doc.getElementById('highlight-1').childNodes[0];
			var cfi = new EpubCFI(t, base, 'annotator-hl');

			assert.equal(t.nodeType, Node.TEXT_NODE, "provided a text node");
			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/32/2[c001p0017]/1)" );

		});

		it('get a cfi from a highlight node', function() {
			var t = doc.getElementById('highlight-1');
			var cfi = new EpubCFI(t, base, 'annotator-hl');

			assert.equal(t.nodeType, Node.ELEMENT_NODE, "provided a highlight node");
			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/32/2[c001p0017])" );

		});

	});

	describe('#fromRange()', function() {
		var base = "/6/4[chap01ref]";

		// var contentsClean = fs.readFileSync(__dirname + '/fixtures/chapter1.xhtml', 'utf8');
		var contentsClean = require('./fixtures/chapter1.xhtml').default;

		var doc = new DOMParser().parseFromString(contentsClean, "application/xhtml+xml");

		// var contentsHighlights = fs.readFileSync(__dirname + '/fixtures/chapter1-highlights.xhtml', 'utf8');
		var contentsHighlights = require('./fixtures/chapter1-highlights.xhtml').default;
		var docHighlights = new DOMParser().parseFromString(contentsHighlights, "application/xhtml+xml");

		// var highlightContents = fs.readFileSync(__dirname + '/fixtures/highlight.xhtml', 'utf8');
		var highlightContents = require('./fixtures/highlight.xhtml').default;
		var docHighlightsAlice = new DOMParser().parseFromString(highlightContents, "application/xhtml+xml");

		it('get a cfi from a collapsed range', function() {
			var t1 = doc.getElementById('c001p0004').childNodes[0];
			var t2 = doc.getElementById('c001p0007').childNodes[0];
			var range = doc.createRange();
			var cfi;

			range.setStart(t1, 6);

			cfi = new EpubCFI(range, base);

			assert.equal( cfi.range, false);
			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/10/2[c001p0004]/1:6)" );

		});

		it('get a cfi from a range', function() {
			var t1 = doc.getElementById('c001p0004').childNodes[0];
			var t2 = doc.getElementById('c001p0007').childNodes[0];
			var range = doc.createRange();
			var cfi;

			range.setStart(t1, 6);
			range.setEnd(t2, 27);

			cfi = new EpubCFI(range, base);

			assert.equal( cfi.range, true);
			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2,/10/2[c001p0004]/1:6,/16/2[c001p0007]/1:27)" );

		});

		it('get a cfi from a range with offset 0', function() {
			var t1 = doc.getElementById('c001p0004').childNodes[0];
			var range = doc.createRange();
			var cfi;

			range.setStart(t1, 0);
			range.setEnd(t1, 1);

			cfi = new EpubCFI(range, base);

			assert.equal( cfi.range, true);
			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/10/2[c001p0004],/1:0,/1:1)" );

		});

		it('get a cfi from a range inside a highlight', function() {
			var t1 = docHighlights.getElementById('highlight-1').childNodes[0];
			var range = docHighlights.createRange();
			var cfi;

			range.setStart(t1, 6);

			cfi = new EpubCFI(range, base, 'annotator-hl');

			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/32/2[c001p0017]/1:43)" );

		});
		// TODO: might need to have double ranges in front
		it('get a cfi from a range past a highlight', function() {
			var t1 = docHighlights.getElementById('c001s0001').childNodes[1];
			var range = docHighlights.createRange();
			var cfi;

			range.setStart(t1, 25);

			cfi = new EpubCFI(range, base, 'annotator-hl');

			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/4/2[c001s0001]/1:41)" );

		});

		it('get a cfi from a range inbetween two highlights', function() {
			var t1 = docHighlightsAlice.getElementById('p2').childNodes[1];
			var range = docHighlightsAlice.createRange();
			var cfi;

			range.setStart(t1, 4);

			cfi = new EpubCFI(range, base, 'annotator-hl');

			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/4[p2]/1:123)" );

		});

		it('correctly count text nodes, independent of any elements present inbetween', function() {
			var t1 = docHighlightsAlice.getElementById('p3').childNodes[2];
			var range = docHighlightsAlice.createRange();
			var cfi;

			range.setStart(t1, 4);

			cfi = new EpubCFI(range, base);

			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/6[p3]/3:4)" );

		});

	});


	describe('#toRange()', function() {
		var base = "/6/4[chap01ref]";
		// var contents = fs.readFileSync(__dirname + '/fixtures/chapter1-highlights.xhtml', 'utf8');
		var contents = require('./fixtures/chapter1-highlights.xhtml').default;

		var doc = new DOMParser().parseFromString(contents, "application/xhtml+xml");

		// var serializer = new XMLSerializer();
		// console.log(serializer.serializeToString(doc));

		it('get a range from a cfi', function() {
			var t1 = doc.getElementById('c001p0004').childNodes[0];
			var t2 = doc.getElementById('c001p0007').childNodes[0];
			var ogRange = doc.createRange();
			var cfi;
			var newRange;

			ogRange.setStart(t1, 6);

			cfi = new EpubCFI(ogRange, base);

			// Check it was parse correctly
			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/10/2[c001p0004]/1:6)" );

			// Check the range
			newRange = cfi.toRange(doc);

			assert.equal( newRange.startContainer, t1);
			assert.equal( newRange.startOffset, 6);
			assert.equal( newRange.collapsed, true);

		});

		it('get a range from a cfi with a range', function() {
			var t1 = doc.getElementById('c001p0004').childNodes[0];
			var t2 = doc.getElementById('c001p0007').childNodes[0];
			var ogRange = doc.createRange();
			var cfi;
			var newRange;

			ogRange.setStart(t1, 6);
			ogRange.setEnd(t2, 27);

			cfi = new EpubCFI(ogRange, base);

			// Check it was parse correctly
			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2,/10/2[c001p0004]/1:6,/16/2[c001p0007]/1:27)" );

			// Check the range
			newRange = cfi.toRange(doc);

			assert.equal( newRange.startContainer, t1);
			assert.equal( newRange.startOffset, 6);

			assert.equal( newRange.endContainer, t2);
			assert.equal( newRange.endOffset, 27);

			assert.equal( newRange.collapsed, false);

		});

		it('get a cfi from a range inside a highlight', function() {
			var t1 = doc.getElementById('highlight-1').childNodes[0];
			var ogRange = doc.createRange();
			var cfi;
			var newRange;

			ogRange.setStart(t1, 6);

			cfi = new EpubCFI(ogRange, base, 'annotator-hl');

			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/32/2[c001p0017]/1:43)" );

			// Check the range
			newRange = cfi.toRange(doc, 'annotator-hl');

			assert.ok(newRange.startContainer);

			assert.equal( newRange.startContainer, t1);
			assert.equal( newRange.startOffset, 6);

		});

		it('get a cfi from a range inside a highlight range', function() {
			var t1 = doc.getElementById('highlight-2').childNodes[0];
			var t2 = doc.getElementById('c001s0001').childNodes[1];
			var ogRange = doc.createRange();
			var cfi;
			var newRange;

			ogRange.setStart(t1, 5);
			ogRange.setEnd(t2, 25);

			cfi = new EpubCFI(ogRange, base, 'annotator-hl');

			assert.equal( cfi.toString(), "epubcfi(/6/4[chap01ref]!/4/2/4/2[c001s0001],/1:5,/1:41)" );

			// Check the range
			newRange = cfi.toRange(doc, 'annotator-hl');

			assert.strictEqual( newRange.startContainer.textContent, t1.textContent);
			// assert.strictEqual( newRange.startContainer, t1);
			// assert.equal( newRange.startOffset, 5);

		});

	});

});