import type { Field, NumberField, NumberFieldSingleValidation } from 'payload'
import { describe, expect, it } from 'vitest'

import { Partners } from '@/collections/Partners'

function partnerField(name: string): Field {
  const field = Partners.fields.find((candidate) => 'name' in candidate && candidate.name === name)
  if (!field) throw new Error(`Missing Partners field: ${name}`)
  return field
}

describe('Partners admin ordering contract', () => {
  it('shows the title and ordering state needed for content operations', () => {
    expect(Partners.admin?.useAsTitle).toBe('name')
    expect(Partners.admin?.defaultColumns).toEqual([
      'name',
      'tier',
      'sortOrder',
      '_status',
      'active',
      'showOnHomepage',
      'updatedAt',
    ])
  })

  it('accepts only numeric tiers 1, 2, and 3', async () => {
    const tierField = partnerField('tier')

    expect(tierField).toMatchObject({
      type: 'number',
      min: 1,
      max: 3,
      required: true,
      admin: { step: 1 },
    })

    const validate = (tierField as NumberField).validate as NumberFieldSingleValidation | undefined
    expect(validate).toBeTypeOf('function')

    for (const value of [1, 2, 3]) {
      expect(await validate?.(value, {} as never)).toBe(true)
    }

    for (const value of [0, 1.5, 4, Number.NaN, null, undefined]) {
      expect(await validate?.(value, {} as never)).toBe('Tier must be one of 1, 2, or 3.')
    }
  })
})