import { describe, expect, test } from "bun:test";
import { parseKdbxHeader } from "../../src/kdbx/header";

function createHeaderBuffer(major: number, minor: number): Uint8Array {
	const buffer = new Uint8Array(12);
	buffer[0] = 0x03;
	buffer[1] = 0xd9;
	buffer[2] = 0xa2;
	buffer[3] = 0x9a;
	buffer[4] = 0x67;
	buffer[5] = 0xfb;
	buffer[6] = 0x4b;
	buffer[7] = 0xb5;
	buffer[8] = minor & 0xff;
	buffer[9] = (minor >> 8) & 0xff;
	buffer[10] = major & 0xff;
	buffer[11] = (major >> 8) & 0xff;
	return buffer;
}

describe("parseKdbxHeader", () => {
	test("reads a valid KDBX signature and version", () => {
		const parsed = parseKdbxHeader(createHeaderBuffer(4, 1));
		expect(parsed.header).toEqual({ version: { major: 4, minor: 1 } });
	});

	test("rejects invalid signatures", () => {
		const buffer = createHeaderBuffer(4, 1);
		buffer[0] = 0x00;
		expect(() => parseKdbxHeader(buffer)).toThrow("Invalid KDBX signature");
	});
});