import { beforeEach, describe, expect, it } from 'vitest'
import {
  hasSettings,
  loadSettings,
  setSettings,
  settings,
  settingsEntry,
  settingsGroups,
  settingsLinkFor,
  settingsPath,
  settingsSectionOf,
  useSettings,
} from '../../src/state/useSettings'
import { settingsFixture } from '../fixtures/typed'
import { API, mockApi, resetState } from '../helpers'

beforeEach(() => {
  resetState()
})

describe('useSettings (D-21)', () => {
  it('is hidden until at least one settings page is permitted', async () => {
    expect(hasSettings.value).toBe(false)
    mockApi({ [`GET ${API}/settings`]: { body: settingsFixture.list } })
    expect(await loadSettings()).toHaveLength(3)
    expect(hasSettings.value).toBe(true)
    expect(useSettings().settings).toBe(settings)
  })

  it('hides settings again when the request fails', async () => {
    setSettings(settingsFixture.list.data)
    mockApi({ [`GET ${API}/settings`]: { status: 403, body: { error: { code: 'forbidden', message: 'x', details: {} } } } })
    expect(await loadSettings()).toEqual([])
    expect(hasSettings.value).toBe(false)
  })

  it('finds an entry by code', () => {
    setSettings(settingsFixture.list.data)
    expect(settingsEntry('mail')?.label).toBe('Mail')
    expect(settingsEntry('nope')).toBeNull()
  })

  it('groups by category in first-seen order after sorting by order', () => {
    setSettings(settingsFixture.list.data)
    expect(settingsGroups.value.map((group) => [group.category, group.entries.map((entry) => entry.code)])).toEqual([
      ['Appearance', ['branding']],
      ['System', ['mail', 'search']],
    ])
  })

  it('links a singleton to its form and a controller link to the controller route', () => {
    const singleton = settingsFixture.list.data[0]!
    expect(settingsPath({ ...singleton, code: 'a b' })).toBe('/settings/a%20b')
    expect(settingsPath({ ...singleton, code: 'locales', model: '', controller: 'acme.demo.locales' })).toBe('/acme/demo/locales')
    expect(settingsPath({ ...singleton, code: 'broken', model: '', controller: 'acme.demo' })).toBe('/settings')
    expect(useSettings().settingsPath).toBe(settingsPath)
  })

  it('finds the link entry that opens a controller, never a singleton', () => {
    const link = { ...settingsFixture.list.data[0]!, code: 'locales', model: '', controller: 'acme.demo.locales' }
    setSettings([...settingsFixture.list.data, link])
    expect(settingsLinkFor('acme.demo.locales')?.code).toBe('locales')
    expect(settingsLinkFor('acme.demo.widgets')).toBeNull()
    expect(settingsLinkFor('')).toBeNull()
    expect(settingsLinkFor(null)).toBeNull()
    expect(useSettings().settingsLinkFor).toBe(settingsLinkFor)
  })
})

describe('settingsSectionOf (quick-261022-imo)', () => {
  const link = (code: string, order: number, controller: string) => ({
    ...settingsFixture.list.data[0]!,
    code,
    label: code,
    model: '',
    controller,
    order,
  })

  it('is null without a current entry or for a one-entry category', () => {
    setSettings(settingsFixture.list.data)
    expect(settingsSectionOf(null)).toBeNull()
    expect(settingsSectionOf(settingsEntry('branding'))).toBeNull()
  })

  it('returns the current category in settingsGroups order', () => {
    setSettings(settingsFixture.list.data)
    const section = settingsSectionOf(settingsEntry('mail'))
    expect(section?.category).toBe('System')
    expect(section?.current.code).toBe('mail')
    expect(section?.entries.map((entry) => entry.code)).toEqual(['mail', 'search'])
  })

  it('places a link entry by its order and never lists another category', () => {
    setSettings([...settingsFixture.list.data, link('locales', 15, 'acme.lang.locales')])
    const section = settingsSectionOf(settingsLinkFor('acme.lang.locales'))
    expect(section?.current.code).toBe('locales')
    expect(section?.entries.map((entry) => entry.code)).toEqual(['mail', 'locales', 'search'])
    expect(section?.entries.some((entry) => entry.category === 'Appearance')).toBe(false)
    expect(settingsSectionOf(settingsEntry('search'))?.entries.map((entry) => entry.code)).not.toContain('branding')
  })

  it('is exposed through useSettings', () => {
    expect(useSettings().settingsSectionOf).toBe(settingsSectionOf)
  })
})