web/src/utils/errors.test.ts

import { describe, it, expect } from 'vitest'
import { localizeError } from './errors'
import { ApiRequestError } from '../api/client'
import type { MessageKey } from '../i18n/en'

// Echo translator: returns the key (with vars) so we can assert which key was chosen.
const t = ((key: MessageKey, vars?: Record<string, string | number>) =>
  vars ? `${key}:${JSON.stringify(vars)}` : key) as (
  key: MessageKey, vars?: Record<string, string | number>,
) => string

describe('localizeError', () => {
  it('maps network error to error.network', () => {
    const e = new ApiRequestError({ status: 0, message: 'network error' })
    expect(localizeError(e, t, 'error.paymentCreate')).toBe('error.network')
  })

  it('maps timeout to error.timeout', () => {
    const e = new ApiRequestError({ status: 0, message: 'request timed out' })
    expect(localizeError(e, t, 'error.paymentCreate')).toBe('error.timeout')
  })

  it('uses localized fallback + request id, NOT raw backend text', () => {
    const e = new ApiRequestError({ status: 422, message: 'cannot cancel a succeeded payment', requestId: 'req1' })
    const out = localizeError(e, t, 'error.cancel')
    expect(out).toContain('error.withRef')
    expect(out).toContain('error.cancel')
    expect(out).toContain('req1')
    expect(out).not.toContain('cannot cancel') // raw backend text never shown
  })

  it('falls back to the operation key when no request id', () => {
    const e = new ApiRequestError({ status: 500, message: 'boom' })
    expect(localizeError(e, t, 'error.refund')).toBe('error.refund')
  })

  it('handles non-API errors with the fallback', () => {
    expect(localizeError(new Error('x'), t, 'error.generic')).toBe('error.generic')
  })
})