import { describe, it, expect } from 'vitest'
import { parseHash, viewToHash, VALID_VIEWS, DEFAULT_VIEW } from '../../src/lib/router.js'

describe('parseHash', () => {
  it('parses a standard hash route', () => {
    expect(parseHash('#/hourly')).toBe('hourly')
    expect(parseHash('#/radar')).toBe('radar')
  })

  it('handles a bare segment without a leading slash', () => {
    expect(parseHash('daily')).toBe('daily')
    expect(parseHash('#daily')).toBe('daily')
  })

  it('falls back to the default view for empty or unknown hashes', () => {
    expect(parseHash('')).toBe(DEFAULT_VIEW)
    expect(parseHash('#')).toBe(DEFAULT_VIEW)
    expect(parseHash('#/nope')).toBe(DEFAULT_VIEW)
    expect(parseHash('#/current')).toBe('current')
  })

  it('ignores a trailing path after the view segment', () => {
    expect(parseHash('#/detail/sub')).toBe('detail')
  })
})

describe('viewToHash', () => {
  it('round-trips a valid view', () => {
    for (const v of VALID_VIEWS) {
      expect(viewToHash(v)).toBe(`#/${v}`)
      expect(parseHash(viewToHash(v))).toBe(v)
    }
  })
})