import { describe, expect, it, spyOn } from "bun:test";

import * as fs from "node:fs/promises";

import { DEFAULT_PUBLISHER_CONFIG, loadConfig } from "../src/lib/config";

const REQUIRED_FIELDS = {

	siteUrl: "https://example.com",

	contentDir: "./content",

	publicationUri: "at://did:plc:abc123/site.standard.publication/main",

};

describe("loadConfig", () => {

	it("applies DEFAULT_PUBLISHER_CONFIG when optional fields are absent", async () => {

		spyOn(fs, "readFile").mockResolvedValue(

			JSON.stringify(REQUIRED_FIELDS) as unknown as Buffer,

		);

		const config = await loadConfig("/fake/sequoia.json");

		expect(config.publicDir).toBe(DEFAULT_PUBLISHER_CONFIG.publicDir);

		expect(config.outputDir).toBe(DEFAULT_PUBLISHER_CONFIG.outputDir);

		expect(config.pathPrefix).toBe(DEFAULT_PUBLISHER_CONFIG.pathPrefix);

		expect(config.publishContent).toBe(DEFAULT_PUBLISHER_CONFIG.publishContent);

		expect(config.removeIndexFromSlug).toBe(

			DEFAULT_PUBLISHER_CONFIG.removeIndexFromSlug,

		);

		expect(config.stripDatePrefix).toBe(

			DEFAULT_PUBLISHER_CONFIG.stripDatePrefix,

		);

		expect(config.autoSync).toBe(DEFAULT_PUBLISHER_CONFIG.autoSync);

	});

	it("uses explicit values when all defaultable fields are set", async () => {

		const custom = {

			...REQUIRED_FIELDS,

			publicDir: "./static",

			outputDir: "./build",

			pathPrefix: "/articles",

			publishContent: false,

			removeIndexFromSlug: true,

			stripDatePrefix: true,

			autoSync: false,

		};

		spyOn(fs, "readFile").mockResolvedValue(

			JSON.stringify(custom) as unknown as Buffer,

		);

		const config = await loadConfig("/fake/sequoia.json");

		expect(config.publicDir).toBe("./static");

		expect(config.outputDir).toBe("./build");

		expect(config.pathPrefix).toBe("/articles");

		expect(config.publishContent).toBe(false);

		expect(config.removeIndexFromSlug).toBe(true);

		expect(config.stripDatePrefix).toBe(true);

		expect(config.autoSync).toBe(false);

	});

});