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

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

describe("zod import form", () => {
    it("every src file uses default-import z", { timeout: 5000 }, () => {
        const root = join(__dirname, "..", "src");
        const offenders: string[] = [];
        for (const file of walk(root)) {
            const text = readFileSync(file, "utf8");
            // Forbid `import { z } from "zod"` and `import { z, ... } from "zod"`.
            if (
                /import\s*\{[^}]*\bz\b[^}]*\}\s*from\s*["']zod["']/.test(text)
            ) {
                offenders.push(file);
            }
        }
        expect(offenders).toEqual([]);
    });
});