const CleanCSS = require("clean-css");
// const is_production = typeof process.env.NODE_ENV === "string" && process.env.NODE_ENV === "production";
const is_production = true;

function do_minifycss(source, output_path) {
	if(!output_path.endsWith(".css") || !is_production) return source;

	const result = new CleanCSS({
			level: 2
	}).minify(source).styles.trim();
	console.log(`MINIFY ${output_path}`, source.length, `→`, result.length, `(${((1 - (result.length / source.length)) * 100).toFixed(2)}% reduction)`);
	return result;
}

module.exports = function (eleventyConfig) {
	// eleventyConfig.addPlugin(EleventyHtmlBasePlugin);

	eleventyConfig.addFilter("cssmin", function (code) {
		return new CleanCSS({}).minify(code).styles;
	});

	eleventyConfig.addTransform("cssmin", do_minifycss);

	eleventyConfig.addTransform("log", async function (content) {
		console.log(this.page.inputPath);
		console.log(this.page.outputPath);

		return content; // no changes made.
	});

	eleventyConfig.setNunjucksEnvironmentOptions({
		// throwOnUndefined: true,
		trimBlocks: true
	});

	eleventyConfig.addGlobalData("permalink", () => {
		return (data) => `${data.page.filePathStem}.${data.page.outputFileExtension}`;
	});

	let demoMode = false;
	let pageBase = demoMode ? './demo/' : './';

	eleventyConfig.addGlobalData("hippie", {
		pageBase: pageBase,
		brand: 'hippie',
		titlePrefix: '',
		titlePostfix: ' - HIPPIE',
		debugMode: true,
		legacyMode: false
	});

	eleventyConfig.addPassthroughCopy({"source/art/images": "art"});

	eleventyConfig.addPassthroughCopy({"source/art/favicons/**/*.+(ico|png|svg)": "."});

	eleventyConfig.addPassthroughCopy({"source/code/**/*.js": "js"});

	eleventyConfig.addPassthroughCopy({"source/data/**/*.json": "json"});

	eleventyConfig.addPassthroughCopy("vendor");

	eleventyConfig.addWatchTarget("./source/style/");

	return {
		dir: {
			input: "source/screens",
			output: "build",
			includes: "../templates",
			data: "../data"
		},
		markdownTemplateEngine: "njk",
		htmlTemplateEngine: "njk",
		templateFormats: ["html", "njk", "md"],
		// pathPrefix: './demo/'
	}
};