import { readdir, readFile } from "node:fs/promises";
import { join } from "node:path";
import { describe, expect, it } from "@suaveplan/testing/runner";

const SRC_DIR = join(import.meta.dirname, "../src");

const DISALLOWED = [
    "node:fs",
    "node:path",
    "process.env",
    "Buffer",
    "document",
    "window",
];

async function collectTsFiles(dir: string): Promise<string[]> {
    const entries = await readdir(dir, { withFileTypes: true });
    const files: string[] = [];
    for (const e of entries) {
        if (e.name === "__benchmarks__") continue;
        if (e.isDirectory()) {
            files.push(...(await collectTsFiles(join(dir, e.name))));
        } else if (
            e.name.endsWith(".ts") &&
            !e.name.endsWith(".test.ts") &&
            !e.name.endsWith(".bench.ts")
        ) {
            files.push(join(dir, e.name));
        }
    }
    return files;
}

describe("no-disallowed", () => {
    it("source files must not use disallowed APIs", {
        timeout: 5000,
    }, async () => {
        const files = await collectTsFiles(SRC_DIR);
        const violations: string[] = [];

        for (const file of files) {
            const content = await readFile(file, "utf-8");
            for (const banned of DISALLOWED) {
                if (content.includes(banned)) {
                    violations.push(`${file}: contains "${banned}"`);
                }
            }
        }

        expect(violations).toEqual([]);
    });
});