import assert from "node:assert/strict";
import fs from "node:fs";
import path from "node:path";
import { spawnSync } from "node:child_process";
import test from "node:test";

const repoRoot = path.join(__dirname, "../../../..");
const generatedPath = path.join(
    repoRoot,
    "frontend/src/generated/inference-config.json",
);
const exportScript = path.join(
    repoRoot,
    "backend/scripts/export-inference-frontend-config.mjs",
);

function runExport(): void {
    const result = spawnSync("node", [exportScript], {
        cwd: path.join(repoRoot, "backend"),
        encoding: "utf8",
    });
    assert.equal(
        result.status,
        0,
        `frontend inference export failed: ${result.stderr || result.stdout}`,
    );
}

test("frontend inference config matches the canonical manifest", () => {
    const committed = fs.readFileSync(generatedPath, "utf8");
    runExport();
    assert.equal(
        fs.readFileSync(generatedPath, "utf8"),
        committed,
        "run npm run export:inference-config and commit the generated artifact",
    );
});

test("frontend inference config export is deterministic", () => {
    runExport();
    const first = fs.readFileSync(generatedPath, "utf8");
    runExport();
    assert.equal(fs.readFileSync(generatedPath, "utf8"), first);
});