import { existsSync, readFileSync } from "node:fs";
import { describe, expect, it } from "vitest";

const CANONICAL_ENTRYPOINTS = [
	"src/app/ase/layout.tsx",
	"src/app/ase/page.tsx",
	"src/app/ase/[domain]/layout.tsx",
	"src/app/ase/[domain]/[[...segments]]/page.tsx",
	"src/features/housekeeping/route-handlers.ts",
] as const;

const REMOVED_UI_ROOTS = [
	"src/app/admin",
	"src/app/admin-next",
	"src/app/ase-next",
	"src/app/mod",
] as const;

const CANONICAL_GLOBAL_SOURCES = [
	"src/features/housekeeping/foundation/routing/href.ts",
	"src/lib/admin/guard.ts",
	"src/lib/proxy-access.ts",
	"src/components/navigation.tsx",
	"src/components/top-header.tsx",
] as const;

const REMOVED_UI_PATH = /\/(?:admin(?:-next)?|ase-next|mod)(?:[/?"'`]|$)/;

describe("atomic Housekeeping route cutover", () => {
	it("publishes the canonical /ase entrypoints and dispatcher", () => {
		for (const path of CANONICAL_ENTRYPOINTS) {
			expect(existsSync(path), path).toBe(true);
		}
	});

	it("removes every legacy UI tree while preserving internal admin APIs", () => {
		for (const path of REMOVED_UI_ROOTS) {
			expect(existsSync(path), path).toBe(false);
		}

		expect(existsSync("src/app/api/admin/csrf/route.ts")).toBe(true);
	});

	it("uses /ase for global links, proxy access, and authorization fallbacks", () => {
		for (const path of CANONICAL_GLOBAL_SOURCES) {
			const source = readFileSync(path, "utf8");
			expect(source, path).toContain("/ase");
			expect(source, path).not.toMatch(REMOVED_UI_PATH);
		}
	});

	it("removes the preview gate and environment flag", () => {
		expect(
			existsSync("src/features/housekeeping/foundation/preview-gate.ts"),
		).toBe(false);
		for (const path of ["src/env.ts", ".env.example"] as const) {
			expect(readFileSync(path, "utf8"), path).not.toContain(
				"HOUSEKEEPING_NEXT_PREVIEW_ENABLED",
			);
		}
	});

	it("does not add redirects for removed UI paths", () => {
		for (const path of ["next.config.ts", "src/proxy.ts"] as const) {
			const source = readFileSync(path, "utf8");
			expect(source, path).not.toMatch(
				/(?:source|destination|redirect)\s*[:(][^\n]*(?:\/admin|\/admin-next|\/ase-next|\/mod)/,
			);
		}
	});
});