import { readdirSync, readFileSync, statSync } from "node:fs";
import { join } from "node:path";
import { describe, expect, it } from "@suaveplan/testing/runner";

const SRC_ROOT = join(__dirname, "..", "src");

function walkTypescript(dir: string): string[] {
    const entries = readdirSync(dir);
    const files: string[] = [];
    for (const entry of entries) {
        const full = join(dir, entry);
        const st = statSync(full);
        if (st.isDirectory()) {
            files.push(...walkTypescript(full));
        } else if (
            entry.endsWith(".ts") &&
            !entry.endsWith(".test.ts") &&
            !entry.endsWith(".spec.ts")
        ) {
            files.push(full);
        }
    }
    return files;
}

describe("universal dep graph", () => {
    it("src contains no node/bun/fs/path/stream/net/http/crypto imports", {
        timeout: 5000,
    }, () => {
        const banned =
            /from\s+['"](node:|bun:|fs|path|stream|net|http|crypto)['"]/;
        const offenders: string[] = [];
        for (const file of walkTypescript(SRC_ROOT)) {
            const text = readFileSync(file, "utf8");
            if (banned.test(text)) {
                offenders.push(file);
            }
        }
        expect(offenders).toEqual([]);
    });
});