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

const here = dirname(fileURLToPath(import.meta.url));
const srcRoot = resolve(here, "..", "src");

function walk(dir: string): string[] {
    const out: string[] = [];
    for (const name of readdirSync(dir)) {
        const full = join(dir, name);
        const st = statSync(full);
        if (st.isDirectory()) out.push(...walk(full));
        else if (full.endsWith(".ts")) out.push(full);
    }
    return out;
}

describe("zod import discipline", () => {
    it("every src file uses default-import z (never named { z })", {
        timeout: 5000,
    }, () => {
        const offenders: string[] = [];
        for (const file of walk(srcRoot)) {
            const text = readFileSync(file, "utf8");
            // Named-form: import { z } from "zod"
            if (/import\s*\{\s*z\s*\}\s*from\s*["']zod["']/.test(text)) {
                offenders.push(file);
            }
        }
        expect(offenders).toEqual([]);
    });
});