/**
 * utils/indicator-favorite 关注指标收藏单测（T04 方案A：后端持久化 + 本地降级）
 * 规则来源：design §8.1 / §8.3（F4）、§11.3 T04
 * 隔离维度：userId × familyId × memberId × sourceType → 不同 key，防串号
 * 后端契约：/api/indicator/favorite/{toggle,list,remove}，见
 *          specs/2026-10-30-indicator-favorite-backend-design.md §4
 */
jest.mock('@/utils/api.js', () => ({
  listIndicatorFavorites: jest.fn(),
  toggleIndicatorFavorite: jest.fn(),
  removeIndicatorFavorite: jest.fn()
}))

import { buildFavoriteKey, readFavorites, writeFavorites, toggleFavorite, removeFavorite } from '@/utils/indicator-favorite'
import { listIndicatorFavorites, toggleIndicatorFavorite, removeIndicatorFavorite } from '@/utils/api'

/** 后端成功响应包装（api.js 的 request() resolve 的是整个 Result） */
function ok(data) {
  return Promise.resolve({ code: 200, message: 'success', data: data })
}

const SCOPE = { userId: 1, familyId: 1, memberId: 1, sourceType: 'gut_flora' }

describe('indicator-favorite 关注指标收藏（方案A：后端持久化 + 本地降级）', () => {
  beforeEach(function() {
    jest.clearAllMocks()
    // 每个用例前清空 storage，避免用例间污染
    if (global.uni && global.uni._storage) {
      Object.keys(global.uni._storage).filter(function(k) { return k.indexOf('cfc:indicator:fav:') === 0 }).forEach(function(k) { delete global.uni._storage[k] })
    }
  })

  describe('buildFavoriteKey', () => {
    test('默认维度全部填充占位符', () => {
      var key = buildFavoriteKey({})
      expect(key).toMatch(/cfc:indicator:fav:anon:nofamily:nomember:all$/)
    })
    test('全维度隔离', () => {
      var k1 = buildFavoriteKey({ userId: 1, familyId: 2, memberId: 3, sourceType: 'gut_flora' })
      var k2 = buildFavoriteKey({ userId: 1, familyId: 2, memberId: 4, sourceType: 'gut_flora' })
      expect(k2).not.toBe(k1)
      expect(k2).toContain(':4:')
    })
    test('sourceType 隔离', () => {
      var k1 = buildFavoriteKey({ userId: 1, familyId: 2, memberId: 3, sourceType: 'gut_flora' })
      var k2 = buildFavoriteKey({ userId: 1, familyId: 2, memberId: 3, sourceType: 'food_recommend' })
      expect(k2).not.toBe(k1)
    })
    test('不同 familyId 隔离', () => {
      var k1 = buildFavoriteKey({ userId: 1, familyId: 2, memberId: 3 })
      var k2 = buildFavoriteKey({ userId: 1, familyId: 5, memberId: 3 })
      expect(k2).not.toBe(k1)
    })
  })

  describe('readFavorites（后端优先）', () => {
    test('后端返回 definitionIds → 原样返回并回写本地缓存', async () => {
      listIndicatorFavorites.mockReturnValue(ok({ memberId: 1, sourceType: 'gut_flora', definitionIds: [456, 789] }))

      var ids = await readFavorites(SCOPE)

      expect(ids).toEqual([456, 789])
      expect(listIndicatorFavorites).toHaveBeenCalledWith({ memberId: 1, sourceType: 'gut_flora' })
      // 回写本地：下次离线可降级读
      expect(global.uni._storage[buildFavoriteKey(SCOPE)]).toEqual([456, 789])
    })

    test('后端返回空集合 → []', async () => {
      listIndicatorFavorites.mockReturnValue(ok({ memberId: 1, sourceType: 'gut_flora', definitionIds: [] }))

      expect(await readFavorites(SCOPE)).toEqual([])
    })

    test('后端 reject → 降级读本地 Storage', async () => {
      writeFavorites(SCOPE, [101, 102])
      listIndicatorFavorites.mockReturnValue(Promise.reject({ code: 500, message: 'boom' }))

      expect(await readFavorites(SCOPE)).toEqual([101, 102])
    })

    test('后端返回无 data（如 401 未登录）→ 降级读本地', async () => {
      writeFavorites(SCOPE, [101])
      listIndicatorFavorites.mockReturnValue(Promise.resolve({ code: 401, message: '请先登录', data: null }))

      expect(await readFavorites(SCOPE)).toEqual([101])
    })

    test('本地无缓存且后端不可用 → []', async () => {
      listIndicatorFavorites.mockReturnValue(Promise.reject(new Error('network')))

      expect(await readFavorites(SCOPE)).toEqual([])
    })

    test('缺 memberId/sourceType（未登录/无视角）→ 不调后端，直接读本地', async () => {
      writeFavorites({}, [101])

      expect(await readFavorites({})).toEqual([101])
      expect(listIndicatorFavorites).not.toHaveBeenCalled()
    })

    test('非法本地数据容错返回 []', async () => {
      var key = buildFavoriteKey(SCOPE)
      listIndicatorFavorites.mockReturnValue(Promise.reject(new Error('network')))
      global.uni._storage[key] = 'not-a-json'
      expect(await readFavorites(SCOPE)).toEqual([])
      global.uni._storage[key] = 123
      expect(await readFavorites(SCOPE)).toEqual([])
    })

    test('跨 scope 隔离：不同 memberId 读到各自缓存', async () => {
      var s2 = { userId: 1, familyId: 1, memberId: 2, sourceType: 'gut_flora' }
      var s3 = { userId: 1, familyId: 1, memberId: 3, sourceType: 'gut_flora' }
      writeFavorites(s2, [101])
      listIndicatorFavorites.mockReturnValue(Promise.reject(new Error('network')))

      expect(await readFavorites(s2)).toEqual([101])
      expect(await readFavorites(s3)).toEqual([])
    })
  })

  describe('toggleFavorite（异步 + 乐观更新 + 失败回滚）', () => {
    test('首次收藏 → 调后端，added=true，本地写入', async () => {
      toggleIndicatorFavorite.mockReturnValue(ok({ definitionId: 101, added: true }))

      var res = await toggleFavorite(SCOPE, 101)

      expect(res.added).toBe(true)
      expect(res.ids).toEqual([101])
      expect(toggleIndicatorFavorite).toHaveBeenCalledWith({ memberId: 1, sourceType: 'gut_flora', definitionId: 101 })
      expect(global.uni._storage[buildFavoriteKey(SCOPE)]).toEqual([101])
    })

    test('已收藏再点 → added=false，从本地移除', async () => {
      writeFavorites(SCOPE, [101])
      toggleIndicatorFavorite.mockReturnValue(ok({ definitionId: 101, added: false }))

      var res = await toggleFavorite(SCOPE, 101)

      expect(res.added).toBe(false)
      expect(res.ids).toEqual([])
      expect(global.uni._storage[buildFavoriteKey(SCOPE)]).toEqual([])
    })

    test('后端失败 → 回滚本地，added=false', async () => {
      writeFavorites(SCOPE, [101])
      toggleIndicatorFavorite.mockReturnValue(Promise.reject({ code: 500, message: 'boom' }))

      var res = await toggleFavorite(SCOPE, 102)

      expect(res.added).toBe(false)
      expect(res.ids).toEqual([101]) // 回滚到调用前
      expect(global.uni._storage[buildFavoriteKey(SCOPE)]).toEqual([101])
    })

    test('后端失败且原本为空 → 回滚为空', async () => {
      toggleIndicatorFavorite.mockReturnValue(Promise.reject(new Error('network')))

      var res = await toggleFavorite(SCOPE, 101)

      expect(res.ids).toEqual([])
      expect(global.uni._storage[buildFavoriteKey(SCOPE)]).toEqual([])
    })

    test('后端返回 added=false（服务端已有该收藏）→ 本地缓存同步为未收藏', async () => {
      // 本地缓存过期（空），但服务端判定「已存在→删除」
      toggleIndicatorFavorite.mockReturnValue(ok({ definitionId: 101, added: false }))

      var res = await toggleFavorite(SCOPE, 101)

      expect(res.added).toBe(false)
      expect(res.ids).toEqual([])
    })

    test('定义 id 非法（NaN）→ 不改变存储、不调后端', async () => {
      writeFavorites(SCOPE, [101])

      var res = await toggleFavorite(SCOPE, 'not-a-number')

      expect(res.ids).toEqual([101])
      expect(res.added).toBe(false)
      expect(toggleIndicatorFavorite).not.toHaveBeenCalled()
    })

    test('缺 memberId（未登录）→ 本地模式，不调后端', async () => {
      var res = await toggleFavorite({}, 101)

      expect(res.added).toBe(true)
      expect(res.ids).toEqual([101])
      expect(toggleIndicatorFavorite).not.toHaveBeenCalled()
    })

    test('跨 sourceType 收藏隔离', async () => {
      var s2 = { userId: 1, familyId: 1, memberId: 1, sourceType: 'food_recommend' }
      toggleIndicatorFavorite.mockReturnValue(ok({ definitionId: 101, added: true }))

      await toggleFavorite(SCOPE, 101)

      expect(global.uni._storage[buildFavoriteKey(SCOPE)]).toEqual([101])
      expect(global.uni._storage[buildFavoriteKey(s2)]).toBeUndefined()
      expect(await readFavorites(s2)).toEqual([])
    })
  })

  describe('removeFavorite（显式删除，幂等）', () => {
    test('移除已收藏 → removed=true，本地删除', async () => {
      writeFavorites(SCOPE, [101, 102])
      removeIndicatorFavorite.mockReturnValue(ok({ definitionId: 101, removed: true }))

      var res = await removeFavorite(SCOPE, 101)

      expect(res.removed).toBe(true)
      expect(res.ids).toEqual([102])
      expect(removeIndicatorFavorite).toHaveBeenCalledWith({ memberId: 1, sourceType: 'gut_flora', definitionId: 101 })
    })

    test('移除不存在的项（后端幂等）→ removed=true，本地不变', async () => {
      writeFavorites(SCOPE, [102])
      removeIndicatorFavorite.mockReturnValue(ok({ definitionId: 999, removed: true }))

      var res = await removeFavorite(SCOPE, 999)

      expect(res.removed).toBe(true)
      expect(res.ids).toEqual([102])
    })

    test('后端失败 → 回滚本地，removed=false', async () => {
      writeFavorites(SCOPE, [101])
      removeIndicatorFavorite.mockReturnValue(Promise.reject(new Error('network')))

      var res = await removeFavorite(SCOPE, 101)

      expect(res.removed).toBe(false)
      expect(res.ids).toEqual([101])
      expect(global.uni._storage[buildFavoriteKey(SCOPE)]).toEqual([101])
    })

    test('定义 id 非法 → 不调后端', async () => {
      writeFavorites(SCOPE, [101])

      var res = await removeFavorite(SCOPE, 'x')

      expect(res.removed).toBe(false)
      expect(res.ids).toEqual([101])
      expect(removeIndicatorFavorite).not.toHaveBeenCalled()
    })
  })
})