import { expect, describe, it } from 'vitest';
import { hexToBase64, base64ToHex } from './base64';
import { generateKey } from './tmp-secret';

describe('base64 utility', () => {
  it('should convert hex to base64', () => {
    const input = '0x48656c6c6f2c20576f726c6421';
    const expectedOutput = 'SGVsbG8sIFdvcmxkIQ';
    const encoded = hexToBase64(input);
    expect(encoded).toBe(expectedOutput);
  });

  it('should convert base64 to hex', () => {
    const input = 'SGVsbG8sIFdvcmxkIQ';
    const expectedOutput = '0x48656c6c6f2c20576f726c6421';
    const decoded = base64ToHex(input);
    expect(decoded).toBe(expectedOutput);
  });

  it('should handle empty hex string conversion to base64', () => {
    const input = '0x';
    const expectedOutput = '';
    const encoded = hexToBase64(input);
    expect(encoded).toBe(expectedOutput);
  });

  it('should handle empty base64 string conversion to hex', () => {
    const input = '';
    const expectedOutput = '0x';
    const decoded = base64ToHex(input);
    expect(decoded).toBe(expectedOutput);
  });

  it('should handle special characters in hex to base64 conversion', () => {
    const input = '0xe79fbce6b8a3e5ad97e7acac';
    const expectedOutput = '55-85rij5a2X56ys';
    const encoded = hexToBase64(input);
    expect(encoded).toBe(expectedOutput);
  });

  it('should handle special characters in base64 to hex conversion', () => {
    const input = '55-85rij5a2X56ys';
    const expectedOutput = '0xe79fbce6b8a3e5ad97e7acac';
    const decoded = base64ToHex(input);
    expect(decoded).toBe(expectedOutput);
  });

  it('fuzz', () => {
    const hex = generateKey();
    const base64 = hexToBase64(hex);
    const decoded = base64ToHex(base64);
    expect(decoded).toBe(hex);
  });

  it('zero prefix', () => {
    const hex = '0x000123456789abcdef';
    const base64 = hexToBase64(hex);
    const decoded = base64ToHex(base64);
    expect(decoded).toBe(hex);
  });

  it('zero suffix', () => {
    const hex = '0x123456789abcdef000';
    const base64 = hexToBase64(hex);
    const decoded = base64ToHex(base64);
    expect(decoded).toBe(hex);
  });

  it('0.5 byte', () => {
    const hex = '0x000123456789abcde';
    expect(() => hexToBase64(hex)).toThrow(Error);
  });
});