import {describe, it, expect} from 'vitest'
import {filterVersions, getFilterStats} from '../version-utils.js'

// Usine à versions pour les tests
const makeVersion = (id, overrides = {}) => ({
  id,
  name: `Version ${id}`,
  date_created: '2024-03-15T10:00:00Z',
  user_created: `user-${id}-suffix`,
  delta: {contenu: `Contenu de la version ${id}`},
  ...overrides,
})

describe('filterVersions', () => {
  it('renvoie un tableau vide si versions est vide', () => {
    expect(filterVersions([], '', {})).toEqual([])
  })

  it('renvoie un tableau vide si versions est null', () => {
    expect(filterVersions(null, '', {})).toEqual([])
  })

  it('renvoie toutes les versions sans filtre ni recherche', () => {
    const versions = [makeVersion(1), makeVersion(2)]

    expect(filterVersions(versions, '', {})).toHaveLength(2)
  })

  describe('recherche textuelle (searchTerm)', () => {
    it('filtre par contenu', () => {
      const versions = [
        makeVersion(1, {delta: {contenu: 'liberté égalité fraternité'}}),
        makeVersion(2, {delta: {contenu: 'droits fondamentaux'}}),
      ]
      const result = filterVersions(versions, 'liberté', {})

      expect(result).toHaveLength(1)
      expect(result[0].id).toBe(1)
    })

    it('filtre par nom de version', () => {
      const versions = [
        makeVersion(1, {name: 'Proposition Dupont'}),
        makeVersion(2, {name: 'Version Martin'}),
      ]
      const result = filterVersions(versions, 'dupont', {})

      expect(result).toHaveLength(1)
      expect(result[0].id).toBe(1)
    })

    it('filtre par auteur (préfixe du user_created)', () => {
      const versions = [
        makeVersion(1, {user_created: 'alice-uuid'}),
        makeVersion(2, {user_created: 'bob-uuid'}),
      ]
      const result = filterVersions(versions, 'alice', {})

      expect(result).toHaveLength(1)
      expect(result[0].id).toBe(1)
    })

    it('est insensible à la casse', () => {
      const versions = [makeVersion(1, {name: 'Proposition Alpha'})]

      expect(filterVersions(versions, 'ALPHA', {})).toHaveLength(1)
    })

    it('renvoie vide si aucune correspondance', () => {
      const versions = [makeVersion(1), makeVersion(2)]

      expect(filterVersions(versions, 'zzz-inexistant', {})).toHaveLength(0)
    })
  })

  describe('filtre par auteur (filters.author)', () => {
    it('ne retient que les versions de l\'auteur indiqué', () => {
      const versions = [
        makeVersion(1, {user_created: 'alice-uuid'}),
        makeVersion(2, {user_created: 'bob-uuid'}),
      ]
      const result = filterVersions(versions, '', {author: 'alice'})

      expect(result).toHaveLength(1)
      expect(result[0].id).toBe(1)
    })

    it('renvoie vide si aucune version de cet auteur', () => {
      const versions = [makeVersion(1, {user_created: 'alice-uuid'})]

      expect(filterVersions(versions, '', {author: 'bob'})).toHaveLength(0)
    })
  })

  describe('filtre par plage de dates', () => {
    const versions = [
      makeVersion(1, {date_created: '2024-01-10T00:00:00Z'}),
      makeVersion(2, {date_created: '2024-03-15T00:00:00Z'}),
      makeVersion(3, {date_created: '2024-06-20T00:00:00Z'}),
    ]

    it('filtre les versions antérieures à dateFrom', () => {
      const result = filterVersions(versions, '', {dateFrom: '2024-03-01'})

      expect(result.map(v => v.id)).toEqual([2, 3])
    })

    it('filtre les versions postérieures à dateTo', () => {
      const result = filterVersions(versions, '', {dateTo: '2024-04-01'})

      expect(result.map(v => v.id)).toEqual([1, 2])
    })

    it('combine dateFrom et dateTo', () => {
      const result = filterVersions(versions, '', {dateFrom: '2024-02-01', dateTo: '2024-05-01'})

      expect(result.map(v => v.id)).toEqual([2])
    })
  })
})

describe('getFilterStats', () => {
  it('calcule les totaux correctement', () => {
    const original = [makeVersion(1), makeVersion(2), makeVersion(3)]
    const filtered = [makeVersion(1)]

    expect(getFilterStats(original, filtered)).toEqual({
      total: 3,
      filtered: 1,
      hidden: 2,
    })
  })

  it('renvoie hidden: 0 quand rien n\'est filtré', () => {
    const versions = [makeVersion(1), makeVersion(2)]

    expect(getFilterStats(versions, versions)).toEqual({
      total: 2,
      filtered: 2,
      hidden: 0,
    })
  })

  it('gère les tableaux vides', () => {
    expect(getFilterStats([], [])).toEqual({total: 0, filtered: 0, hidden: 0})
  })
})