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

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

function walk(dir: string, out: string[] = []): string[] {
    for (const entry of readdirSync(dir, { withFileTypes: true })) {
        const p = join(dir, entry.name);
        if (entry.isDirectory()) {
            if (entry.name === "node_modules" || entry.name === "dist")
                continue;
            walk(p, out);
        } else if (
            entry.name.endsWith(".ts") &&
            !entry.name.endsWith(".test.ts") &&
            !entry.name.endsWith(".bench.ts")
        ) {
            out.push(p);
        }
    }
    return out;
}

describe("source-tree hygiene", () => {
    it("src tree contains zero Math.random references", {
        timeout: 5000,
    }, () => {
        const files = walk(SRC_ROOT);
        const hits: string[] = [];
        for (const f of files) {
            const content = readFileSync(f, "utf8");
            if (/\bMath\.random\b/.test(content)) hits.push(f);
        }
        expect(hits).toEqual([]);
    });

    it("src tree contains zero biome-ignore directives", {
        timeout: 5000,
    }, () => {
        const files = walk(SRC_ROOT);
        const hits: string[] = [];
        for (const f of files) {
            const content = readFileSync(f, "utf8");
            if (/biome-ignore/.test(content)) hits.push(f);
        }
        expect(hits).toEqual([]);
    });
});