import assert from "node:assert/strict";
import { test } from "node:test";
import { bindParameters, exportOf, validateComposition } from "./index.js";
import { checkBound } from "./params.js";

const manifest = () => ({
	instances: [{ name: "vm", module: "m", input: { cpus: { $param: "cpus" }, who: [{ $param: "who" }], key: { $host: "sshKey" }, token: { $param: "token" } } }],
	parameters: [
		{ key: "cpus", type: "integer", minimum: 1, maximum: 4, values: { default: 2 } },
		{ key: "who", values: { enum: ["a", "b"] } },
		{ key: "token", secret: true, required: true },
	],
	exports: [{ nsid: "computer.socialweb.machine.provision", instance: "vm", entry: "contract" }],
});

test("parameters bind, validate and export as rust/host/src/params.rs does", () => {
	const m = manifest();
	validateComposition(m);
	const host = { sshKey: "ssh-ed25519 K" };
	const secrets = { token: "t" };
	const bound = bindParameters(m, { secrets, host });
	assert.deepEqual(bound.instances[0].input, { cpus: 2, who: [null], key: "ssh-ed25519 K", token: "t" });
	checkBound(bound);
	assert.throws(() => checkBound(m), { message: "composition: parameter cpus is not bound" });
	for (const [inputs, err] of [
		[{ cpus: 9 }, "parameter cpus must be at most 4"],
		[{ cpus: "2" }, "parameter cpus must be of type integer"],
		[{ who: "c" }, 'parameter who must be one of ["a","b"]'],
		[{ token: "t" }, "parameter token is a secret: give it in secrets, not inputs"],
		[{ nope: 1 }, "parameter nope is not declared"],
	]) {
		assert.throws(() => bindParameters(m, { inputs, secrets, host }), { message: `composition: ${err}` });
	}
	assert.throws(() => bindParameters(m, { host }), { message: "composition: parameter token is required" });
	assert.throws(() => bindParameters(m, { secrets }), { message: "composition: host value sshKey is not given by this host" });
	assert.equal(exportOf(m, "computer.socialweb.machine.provision").entry, "contract");
	const bad = manifest();
	bad.parameters[0].values.default = 7;
	assert.throws(() => validateComposition(bad), { message: "composition: parameter cpus: 7 must be at most 4" });
});