import { describe, it, expect } from 'vitest'
import { isCotFirstByte, COT_FIRST_BYTE_TAK, COT_FIRST_BYTE_XML } from '../../server/utils/cotRouter.js'

describe('cotRouter', () => {
  describe('isCotFirstByte', () => {
    it('returns true for TAK Protocol (0xBF)', () => {
      expect(isCotFirstByte(0xBF)).toBe(true)
      expect(isCotFirstByte(COT_FIRST_BYTE_TAK)).toBe(true)
    })

    it('returns true for traditional XML (<)', () => {
      expect(isCotFirstByte(0x3C)).toBe(true)
      expect(isCotFirstByte(COT_FIRST_BYTE_XML)).toBe(true)
    })

    it('returns false for HTTP-like first bytes', () => {
      expect(isCotFirstByte(0x47)).toBe(false) // 'G' GET
      expect(isCotFirstByte(0x50)).toBe(false) // 'P' POST
      expect(isCotFirstByte(0x48)).toBe(false) // 'H' HEAD
    })

    it('returns false for other bytes', () => {
      expect(isCotFirstByte(0x00)).toBe(false)
      expect(isCotFirstByte(0x16)).toBe(false) // TLS client hello
    })
  })
})