import { evaluateFieldLinkage } from '@/utils/fieldLinkage'

const fields = [
  { id: 1, name: 'need_invoice', type: 'select', multiple: 0 },
  {
    id: 2,
    name: 'invoice_address',
    type: 'text',
    visibility_rule: { mode: 'show_when', control_field_id: 1, values: ['是'] }
  }
]

describe('evaluateFieldLinkage', () => {
  it('disables a writable controlled field when its control value does not match', () => {
    const result = evaluateFieldLinkage({ fields, form: { need_invoice: '否' }, writeable: [1, 2] })

    expect(result.disabledFieldIds.has(2)).toBe(true)
    expect(result.disabledFieldNames.has('invoice_address')).toBe(true)
  })

  it('keeps the field enabled when the control value matches', () => {
    const result = evaluateFieldLinkage({ fields, form: { need_invoice: '是' }, writeable: [1, 2] })

    expect(result.disabledFieldIds.has(2)).toBe(false)
    expect(result.states[2].reason).toBe('value_matched')
  })

  it('does not activate the rule unless both fields are writable', () => {
    const result = evaluateFieldLinkage({ fields, form: { need_invoice: '否' }, writeable: [2] })

    expect(result.disabledFieldIds.size).toBe(0)
    expect(result.states[2].reason).toBe('not_both_writable')
  })

  it('fails open for unsupported multi-select controls', () => {
    const multiFields = [
      { ...fields[0], multiple: 1 },
      fields[1]
    ]
    const result = evaluateFieldLinkage({ fields: multiFields, form: { need_invoice: '否' }, writeable: [1, 2] })

    expect(result.disabledFieldIds.size).toBe(0)
    expect(result.states[2].reason).toBe('invalid_rule')
  })
})