import {
	IdAttributePlugin,
	InputPathToUrlTransformPlugin,
	HtmlBasePlugin
} from "@11ty/eleventy";
import { feedPlugin } from "@11ty/eleventy-plugin-rss";
import pluginSyntaxHighlight from "@11ty/eleventy-plugin-syntaxhighlight";
import pluginNavigation from "@11ty/eleventy-navigation";
import { eleventyImageTransformPlugin } from "@11ty/eleventy-img";

import pluginFilters from "./_config/filters.js";

/** @param {import("@11ty/eleventy").UserConfig} eleventyConfig */
export default async function (eleventyConfig) {
	// Drafts, see also _data/eleventyDataSchema.js
	eleventyConfig.addPreprocessor("drafts", "*", (data, content) => {
		if (data.draft && process.env.ELEVENTY_RUN_MODE === "build") {
			return false;
		}
	});

	// Copy the contents of the `public` folder to the output folder
	// For example, `./public/css/` ends up in `_site/css/`
	eleventyConfig
		.addPassthroughCopy({
			"./public/": "/"
		})
		.addPassthroughCopy("./content/feed/pretty-atom-feed.xsl")
		.addPassthroughCopy("./content/blog/**/images/*");

	// Run Eleventy when these files change:
	// https://www.11ty.dev/docs/watch-serve/#add-your-own-watch-targets

	// Watch content images for the image pipeline.
	eleventyConfig.addWatchTarget("content/blog/**/*.md");
	eleventyConfig.addWatchTarget("content/blog/**/*.{svg,webp,png,jpeg}");

	// Per-page bundles, see https://github.com/11ty/eleventy-plugin-bundle
	// Adds the {% css %} paired shortcode
	eleventyConfig.addBundle("css", {
		toFileDirectory: "dist"
	});
	// Adds the {% js %} paired shortcode
	eleventyConfig.addBundle("js", {
		toFileDirectory: "dist"
	});

	eleventyConfig.setFrontMatterParsingOptions({
		excerpt: true,
		excerpt_separator: "<!-- excerpt -->"
	});

	// Official plugins
	eleventyConfig.addPlugin(pluginSyntaxHighlight, {
		preAttributes: { tabindex: 0 }
	});
	eleventyConfig.addPlugin(pluginNavigation);
	eleventyConfig.addPlugin(HtmlBasePlugin);
	eleventyConfig.addPlugin(InputPathToUrlTransformPlugin);

	eleventyConfig.addPlugin(feedPlugin, {
		type: "atom", // or "rss", "json"
		outputPath: "/feed/feed.xml",
		stylesheet: "pretty-atom-feed.xsl",
		templateData: {
			eleventyNavigation: {
				key: "Feed",
				order: 4
			}
		},
		collection: {
			name: "posts",
			limit: 10
		},
		metadata: {
			language: "en",
			title: "Chris Kaczor",
			subtitle: "Code, Critters, and whatever I feel like writing about.",
			base: "https://chriskaczor.com/",
			author: {
				name: "Chris Kaczor"
			}
		}
	});

	// Image optimization: https://www.11ty.dev/docs/plugins/image/#eleventy-transform
	eleventyConfig.addPlugin(eleventyImageTransformPlugin, {
		// File extensions to process in _site folder
		extensions: "html",

		// Output formats for each image.
		formats: ["avif", "webp", "auto"],

		// widths: ["auto"],

		defaultAttributes: {
			// e.g. <img loading decoding> assigned on the HTML tag will override these values.
			loading: "lazy",
			decoding: "async"
		}
	});

	// Filters
	eleventyConfig.addPlugin(pluginFilters);

	eleventyConfig.addPlugin(IdAttributePlugin, {
		// by default we use Eleventy’s built-in `slugify` filter:
		// slugify: eleventyConfig.getFilter("slugify"),
		// selector: "h1,h2,h3,h4,h5,h6", // default
	});

	eleventyConfig.addShortcode("currentBuildDate", () => {
		return new Date().toISOString();
	});

	eleventyConfig.amendLibrary("md", (mdLib) => {
		var defaultImageRender = mdLib.renderer.rules.image;

		mdLib.renderer.rules.image = function (
			tokens,
			idx,
			options,
			env,
			self
		) {
			const token = tokens[idx];
			const aIndex = token.attrIndex("src");
			const link = token.attrs[aIndex][1];

			if (/(http(s?)):\/\//i.test(link)) {
				// Ignore
			} else {
				tokens[idx].attrs[aIndex][1] = env.page.url + link;
			}

			return defaultImageRender(tokens, idx, options, env, self);
		};

		var defaultLinkOpenRender =
			mdLib.renderer.rules.link_open ||
			function (tokens, idx, options, env, self) {
				return self.renderToken(tokens, idx, options);
			};

		mdLib.renderer.rules.link_open = function (
			tokens,
			idx,
			options,
			env,
			self
		) {
			const token = tokens[idx];
			const aIndex = token.attrIndex("href");
			const link = token.attrs[aIndex][1];

			if (/(http(s?)):\/\//i.test(link)) {
				// Ignore
			} else {
				tokens[idx].attrs[aIndex][1] = env.page.url + link;
			}

			return defaultLinkOpenRender(tokens, idx, options, env, self);
		};
	});

	// Features to make your build faster (when you need them)

	// If your passthrough copy gets heavy and cumbersome, add this line
	// to emulate the file copy on the dev server. Learn more:
	// https://www.11ty.dev/docs/copy/#emulate-passthrough-copy-during-serve

	// eleventyConfig.setServerPassthroughCopyBehavior("passthrough");
}

export const config = {
	// Control which files Eleventy will process
	// e.g.: *.md, *.njk, *.html, *.liquid
	templateFormats: ["md", "njk", "html", "liquid", "11ty.js"],

	// Pre-process *.md files with: (default: `liquid`)
	markdownTemplateEngine: "njk",

	// Pre-process *.html files with: (default: `liquid`)
	htmlTemplateEngine: "njk",

	// These are all optional:
	dir: {
		input: "content", // default: "."
		includes: "../_includes", // default: "_includes" (`input` relative)
		data: "../_data", // default: "_data" (`input` relative)
		output: "_site"
	}

	// -----------------------------------------------------------------
	// Optional items:
	// -----------------------------------------------------------------

	// If your site deploys to a subdirectory, change `pathPrefix`.
	// Read more: https://www.11ty.dev/docs/config/#deploy-to-a-subdirectory-with-a-path-prefix

	// When paired with the HTML <base> plugin https://www.11ty.dev/docs/plugins/html-base/
	// it will transform any absolute URLs in your HTML to include this
	// folder name and does **not** affect where things go in the output folder.

	// pathPrefix: "/",
};