var gulp = require('gulp');
var metadata = require('./metadata');
var es = require('event-stream');
var path = require('path');
var fs = require('fs');
var rimraf = require('rimraf');
var cp = require('child_process');
var httpServer = require('http-server');

var SAMPLES_MDOC_PATH = path.join(__dirname, 'website/playground/playground.mdoc');
var WEBSITE_GENERATED_PATH = path.join(__dirname, 'website/playground/samples');

gulp.task('clean-release', function(cb) { rimraf('release', { maxBusyTries: 1 }, cb); });
gulp.task('release', ['clean-release'], function() {
	return es.merge(

		// dev folder
		releaseOne('dev'),

		// min folder
		releaseOne('min'),

		// package.json
		gulp.src('package.json')
			.pipe(es.through(function(data) {
				var json = JSON.parse(data.contents.toString());
				json.private = false;
				data.contents = new Buffer(JSON.stringify(json, null, '  '));
				this.emit('data', data);
			}))
			.pipe(gulp.dest('release')),

		// min-maps folder
		gulp.src('node_modules/monaco-editor-core/min-maps/**/*').pipe(gulp.dest('release/min-maps')),

		// other files
		gulp.src([
			'node_modules/monaco-editor-core/LICENSE',
			'node_modules/monaco-editor-core/CHANGELOG.md',
			'node_modules/monaco-editor-core/monaco.d.ts',
			'node_modules/monaco-editor-core/ThirdPartyNotices.txt',
			'README.md'
		])
		.pipe(es.through(function(data) {
			if (/CHANGELOG\.md$/.test(data.path)) {
				fs.writeFileSync('CHANGELOG.md', data.contents);
			}
			this.emit('data', data);
		}))
		.pipe(addPluginDTS())
		.pipe(addPluginThirdPartyNotices())
		.pipe(gulp.dest('release'))
	)
});

function releaseOne(type) {
	return es.merge(
		gulp.src('node_modules/monaco-editor-core/' + type + '/**/*')
			.pipe(addPluginContribs())
			.pipe(gulp.dest('release/' + type)),
		pluginStreams('release/' + type + '/')
	)
}

function pluginStreams(destinationPath) {
	return es.merge(
		metadata.METADATA.PLUGINS.map(function(plugin) {
			return pluginStream(plugin, destinationPath);
		})
	);
}

function pluginStream(plugin, destinationPath) {
	var contribPath = path.join(plugin.path, plugin.contrib.substr(plugin.modulePrefix.length)) + '.js';
	return (
		gulp.src([
			plugin.path + '/**/*',
			'!' + contribPath,
			'!' + plugin.path + '/**/monaco.d.ts'
		])
		.pipe(gulp.dest(destinationPath + plugin.modulePrefix))
	);
}

/**
 * Edit editor.main.js:
 * - rename the AMD module 'vs/editor/editor.main' to 'vs/editor/edcore.main'
 * - append contribs from plugins
 * - append new AMD module 'vs/editor/editor.main' that stiches things together
 */
function addPluginContribs() {
	return es.through(function(data) {
		if (!/editor\.main\.js$/.test(data.path)) {
			this.emit('data', data);
			return;
		}
		var contents = data.contents.toString();

		// Rename the AMD module 'vs/editor/editor.main' to 'vs/editor/edcore.main'
		contents = contents.replace(/"vs\/editor\/editor\.main\"/, '"vs/editor/edcore.main"');

		var extraContent = [];
		var allPluginsModuleIds = [];

		metadata.METADATA.PLUGINS.forEach(function(plugin) {
			allPluginsModuleIds.push(plugin.contrib);
			var contribPath = path.join(__dirname, plugin.path, plugin.contrib.substr(plugin.modulePrefix.length)) + '.js';
			var contribContents = fs.readFileSync(contribPath).toString();

			var contribDefineIndex = contribContents.indexOf('define("' + plugin.contrib);
			if (contribDefineIndex === -1) {
				console.error('(1) CANNOT DETERMINE AMD define location for contribution', plugin);
				process.exit(-1);
			}

			var depsEndIndex = contribContents.indexOf(']', contribDefineIndex);
			if (contribDefineIndex === -1) {
				console.error('(2) CANNOT DETERMINE AMD define location for contribution', plugin);
				process.exit(-1);
			}

			contribContents = contribContents.substring(0, depsEndIndex) + ',"vs/editor/edcore.main"' + contribContents.substring(depsEndIndex);

			extraContent.push(contribContents);
		});

		extraContent.push(`define("vs/editor/editor.main", ["vs/editor/edcore.main","${allPluginsModuleIds.join('","')}"], function() {});`);
		var insertIndex = contents.lastIndexOf('//# sourceMappingURL=');
		if (insertIndex === -1) {
			insertIndex = contents.length;
		}
		contents = contents.substring(0, insertIndex) + '\n' + extraContent.join('\n') + '\n' + contents.substring(insertIndex);

		data.contents = new Buffer(contents);
		this.emit('data', data);
	});
}

/**
 * Edit monaco.d.ts:
 * - append monaco.d.ts from plugins
 */
function addPluginDTS() {
	return es.through(function(data) {
		if (!/monaco\.d\.ts$/.test(data.path)) {
			this.emit('data', data);
			return;
		}
		var contents = data.contents.toString();

		var extraContent = [];
		metadata.METADATA.PLUGINS.forEach(function(plugin) {
			var dtsPath = path.join(plugin.path, 'monaco.d.ts');
			try {
				extraContent.push(fs.readFileSync(dtsPath).toString());
			} catch (err) {
				return;
			}
		});

		contents += '\n' + extraContent.join('\n');
		data.contents = new Buffer(contents);

		fs.writeFileSync('website/playground/monaco.d.ts.txt', contents);
		this.emit('data', data);
	});
}

/**
 * Edit ThirdPartyNotices.txt:
 * - append ThirdPartyNotices.txt from plugins
 */
function addPluginThirdPartyNotices() {
	return es.through(function(data) {
		if (!/ThirdPartyNotices\.txt$/.test(data.path)) {
			this.emit('data', data);
			return;
		}
		var contents = data.contents.toString();

		var extraContent = [];
		metadata.METADATA.PLUGINS.forEach(function(plugin) {
			var thirdPartyNoticePath = path.join(path.dirname(plugin.path), 'ThirdPartyNotices.txt');
			try {
				var thirdPartyNoticeContent = fs.readFileSync(thirdPartyNoticePath).toString();
				thirdPartyNoticeContent = thirdPartyNoticeContent.split('\n').slice(8).join('\n');
				extraContent.push(thirdPartyNoticeContent);
			} catch (err) {
				return;
			}
		});

		contents += '\n' + extraContent.join('\n');
		data.contents = new Buffer(contents);

		this.emit('data', data);
	});
}


// --- website

gulp.task('clean-playground-samples', function(cb) { rimraf(WEBSITE_GENERATED_PATH, { maxBusyTries: 1 }, cb); });
gulp.task('playground-samples', ['clean-playground-samples'], function() {
	function toFolderName(name) {
		var result = name.toLowerCase().replace(/[^a-z0-9\-_]/g, '-');

		while (result.indexOf('--') >= 0) {
			result = result.replace(/--/, '-');
		}

		while (result.charAt(result.length - 1) === '-') {
			result = result.substring(result, result.length - 1);
		}

		return result;
	}

	function parse(txt) {
		function startsWith(haystack, needle) {
			return haystack.substring(0, needle.length) === needle;
		}

		var CHAPTER_MARKER = "=";
		var SAMPLE_MARKER = "==";
		var SNIPPET_MARKER = "=======================";

		var lines = txt.split(/\r\n|\n|\r/);
		var result = [];
		var currentChapter = null;
		var currentSample = null;
		var currentSnippet = null;

		for (var i = 0; i < lines.length; i++) {
			var line = lines[i];

			if (startsWith(line, SNIPPET_MARKER)) {
				var snippetType = line.substring(SNIPPET_MARKER.length).trim();

				if (snippetType === 'HTML' || snippetType === 'JS' || snippetType === 'CSS') {
					currentSnippet = currentSample[snippetType];
				} else {
					currentSnippet = null;
				}
				continue;
			}

			if (startsWith(line, SAMPLE_MARKER)) {
				currentSnippet = null;
				currentSample = {
					name: line.substring(SAMPLE_MARKER.length).trim(),
					JS: [],
					HTML: [],
					CSS: []
				};
				currentChapter.samples.push(currentSample);
				continue;
			}

			if (startsWith(line, CHAPTER_MARKER)) {
				currentSnippet = null;
				currentSample = null;
				currentChapter = {
					name: line.substring(CHAPTER_MARKER.length).trim(),
					samples: []
				};
				result.push(currentChapter);
				continue;
			}

			if (currentSnippet) {
				currentSnippet.push(line);
				continue;
			}

			if (line === '') {
				continue;
			}

			// ignore inter-sample content
			console.warn('IGNORING INTER-SAMPLE CONTENT: ' + line);
		}

		return result;
	}

	var chapters = parse(fs.readFileSync(SAMPLES_MDOC_PATH).toString());

	var allSamples = [];

	fs.mkdirSync(WEBSITE_GENERATED_PATH);

	chapters.forEach(function(chapter) {
		var chapterFolderName = toFolderName(chapter.name);

		chapter.samples.forEach(function(sample) {
			var sampleId = toFolderName(chapter.name + '-' + sample.name);

			sample.sampleId = sampleId;

			var js = [
				'//---------------------------------------------------',
				'// ' + chapter.name + ' > ' + sample.name,
				'//---------------------------------------------------',
				'',
			].concat(sample.JS)
			var sampleOut = {
				id: sampleId,
				js: js.join('\n'),
				html: sample.HTML.join('\n'),
				css: sample.CSS.join('\n')
			};

			allSamples.push({
				chapter: chapter.name,
				name: sample.name,
				sampleId: sampleId
			});

			var content =
`// This is a generated file. Please do not edit directly.
var SAMPLES = this.SAMPLES || [];
SAMPLES.push(${JSON.stringify(sampleOut)});
`

			fs.writeFileSync(path.join(WEBSITE_GENERATED_PATH, sampleId + '.js'), content);
		});
	});

	var content =
`// This is a generated file. Please do not edit directly.
this.SAMPLES = [];
this.ALL_SAMPLES = ${JSON.stringify(allSamples)};`

	fs.writeFileSync(path.join(WEBSITE_GENERATED_PATH, 'all.js'), content);

});

gulp.task('clean-website', function(cb) { rimraf('../monaco-editor-website', { maxBusyTries: 1 }, cb); });
gulp.task('website', ['clean-website', 'playground-samples'], function() {

	return (
		gulp.src('website/**/*', { dot: true })
		.pipe(es.through(function(data) {
			if (!data.contents || !/\.(js|html)$/.test(data.path)) {
				return this.emit('data', data);
			}

			var contents = data.contents.toString();
			contents = contents.replace(/\.\.\/release\/min/g, 'node_modules/monaco-editor/min');
			// contents = contents.replace('&copy; 2016 Microsoft', '&copy; 2016 Microsoft [' + builtTime + ']');

			data.contents = new Buffer(contents);

			this.emit('data', data);
		}))
		.pipe(gulp.dest('../monaco-editor-website'))
		.pipe(es.through(function(data) {
			this.emit('data', data);
		}, function() {
			cp.execSync('npm install monaco-editor', {
				cwd: path.join(__dirname, '../monaco-editor-website')
			});
			cp.execSync('git init', {
				cwd: path.join(__dirname, '../monaco-editor-website')
			});
			cp.execSync('git checkout -b gh-pages', {
				cwd: path.join(__dirname, '../monaco-editor-website')
			});
			cp.execSync('git add .', {
				cwd: path.join(__dirname, '../monaco-editor-website')
			});
			cp.execSync('git commit -m "Publish website"', {
				cwd: path.join(__dirname, '../monaco-editor-website')
			});
			cp.execSync('git remote add origin https://github.com/Microsoft/monaco-editor.git', {
				cwd: path.join(__dirname, '../monaco-editor-website')
			});
			console.log('RUN monaco-editor-website>git push origin gh-pages --force')
			this.emit('end');
		}))
	);

});

gulp.task('simpleserver', function(cb) {
	httpServer.createServer({ root: '../', cache: 5 }).listen(8080);
	httpServer.createServer({ root: '../', cache: 5 }).listen(8088);
	console.log('LISTENING on 8080 and 8088');
});