const { EleventyHtmlBasePlugin } = require("@11ty/eleventy");

module.exports = function (eleventyConfig) {
	// Static passthrough — note src/assets/logos/ (raw design source files) is
	// intentionally excluded; only the cropped, web-sized exports in
	// src/assets/images/ ship to the built site.
	eleventyConfig.addPassthroughCopy({ "src/assets/css": "assets/css" });
	eleventyConfig.addPassthroughCopy({ "src/assets/js": "assets/js" });
	eleventyConfig.addPassthroughCopy({ "src/assets/images": "assets/images" });
	eleventyConfig.addPassthroughCopy({ "src/assets/fonts": "assets/fonts" });
	eleventyConfig.addPassthroughCopy({ "src/robots.txt": "robots.txt" });
	eleventyConfig.addPassthroughCopy({ "src/favicon.ico": "favicon.ico" });

	eleventyConfig.addPlugin(EleventyHtmlBasePlugin);

	eleventyConfig.addWatchTarget("src/assets/css/");

	// Currency formatter — all prices are CAD, whole dollars.
	eleventyConfig.addFilter("cad", (value) => {
		if (value === null || value === undefined || value === "") return "";
		return new Intl.NumberFormat("en-CA", {
			style: "currency",
			currency: "CAD",
			maximumFractionDigits: 0,
		}).format(value);
	});

	// Prepay pricing: 3yr = 2.5x annual, 5yr = 4x annual (applied to "every year after" fees).
	eleventyConfig.addFilter("prepay", (annual, years) => {
		const multiplier = years === 5 ? 4 : years === 3 ? 2.5 : 1;
		return Math.round(annual * multiplier);
	});

	eleventyConfig.addFilter("sum", (values) => values.reduce((a, b) => a + b, 0));

	eleventyConfig.addFilter("findByKey", (arr, value) => (arr || []).find((item) => item.key === value));

	eleventyConfig.addShortcode("year", () => `${new Date().getFullYear()}`);

	return {
		dir: {
			input: "src",
			output: "_site",
			includes: "_includes",
			data: "_data",
		},
		templateFormats: ["njk", "md", "11ty.js"],
		htmlTemplateEngine: "njk",
		markdownTemplateEngine: "njk",
	};
};