import { describe, it, expect } from 'vitest'
import { generatePassword } from '../../../src/lib/crypto/crypto.js'

describe('generatePassword', () => {
  it('should produce different passwords on consecutive calls', () => {
    const passwords = new Set()
    for (let i = 0; i < 50; i++) {
      passwords.add(generatePassword({ length: 16 }))
    }
    // With 50 calls and 94^16 possible values, all should be unique
    expect(passwords.size).toBe(50)
  })

  it('should respect the length option', () => {
    for (let len of [4, 8, 16, 32, 64]) {
      const pw = generatePassword({ length: len })
      expect(pw.length).toBe(len)
    }
  })

  it('should only use allowed character types', () => {
    const pw = generatePassword({ uppercase: true, lowercase: false, digits: false, symbols: false })
    expect(pw).toMatch(/^[A-Z]+$/)

    const pw2 = generatePassword({ uppercase: false, lowercase: true, digits: false, symbols: false })
    expect(pw2).toMatch(/^[a-z]+$/)

    const pw3 = generatePassword({ uppercase: false, lowercase: false, digits: true, symbols: false })
    expect(pw3).toMatch(/^[0-9]+$/)
  })

  it('should exclude specified characters', () => {
    const pw = generatePassword({ length: 32, exclude: '0OIl1' })
    for (const ch of '0OIl1') {
      expect(pw).not.toContain(ch)
    }
  })

  it('should throw when charset is empty', () => {
    expect(() => generatePassword({ uppercase: false, lowercase: false, digits: false, symbols: false }))
      .toThrow()
  })
})