/**
 * i18n 统一维护纯函数测试：
 * 覆盖 index.vue 上移后的受管键收集、扁平行→透视、reconcile（补齐/跟名/失效清理）与保存 diff，
 * 守护「ModuleI18nPanel 受控化」后数据编排逻辑不回退。
 */
import { describe, expect, it } from 'vitest'
import {
  buildI18nChangeRequest,
  buildI18nPivot,
  collectManagedI18nItems,
  reconcileI18nRows,
} from '@/views/module/module-management/utils'

const languages = [
  { code: 'zh-CN', name: '简体中文', default: true },
  { code: 'en-US', name: 'English', default: false },
]
const defaultLocale = 'zh-CN'

function demoModule(over = {}) {
  return {
    b_id: '9',
    b_code: 'demo',
    b_module_type: 'data',
    b_name: '演示模块',
    b_i18n: null,
    ...over,
  }
}

describe('collectManagedI18nItems 受管键收集', () => {
  it('收集模块名与字段名的受管键', () => {
    const items = collectManagedI18nItems({
      module: demoModule(),
      fields: [{ b_id: '1', b_field: 'name', b_name: '姓名', b_i18n: null }],
      groups: [],
    })
    expect(items.map((i) => i.key)).toEqual(['module.demo', 'field.demo.name'])
    expect(items[0].id).toBe('module:module.demo')
    expect(items[1].id).toBe('field:field.demo.name')
    expect(items[0].defaultValue).toBe('演示模块')
    expect(items[1].defaultValue).toBe('姓名')
  })

  it('模块编码为空时不产出受管键（新建未填编码）', () => {
    const items = collectManagedI18nItems({
      module: demoModule({ b_code: '' }),
      fields: [{ b_id: '1', b_field: 'name', b_name: '姓名', b_i18n: null }],
      groups: [],
    })
    expect(items).toEqual([])
  })
})

describe('buildI18nPivot / reconcileI18nRows', () => {
  it('扁平行转透视后 reconcile 补齐受管行并跟随默认语言', () => {
    const flat = [{ b_id: '100', b_key: 'field.demo.name', b_locale: 'en-US', b_value: 'Name' }]
    const pivot = buildI18nPivot(flat)
    const items = collectManagedI18nItems({
      module: demoModule(),
      fields: [{ b_id: '1', b_field: 'name', b_name: '姓名', b_i18n: null }],
      groups: [],
    })
    const rows = reconcileI18nRows(pivot, items, { defaultLocale, languages })

    const byKey = new Map(rows.map((r) => [r.b_key, r]))
    expect(byKey.size).toBe(2)
    // 手工翻译保留
    expect(byKey.get('field.demo.name')['en-US']).toBe('Name')
    // 受管默认语言跟随当前名称
    expect(byKey.get('field.demo.name')['zh-CN']).toBe('姓名')
    expect(byKey.get('module.demo')['zh-CN']).toBe('演示模块')
    expect(byKey.get('field.demo.name')._managedId).toBe('field:field.demo.name')
  })

  it('名称变化后 reconcile 自动跟名，人工翻译不被覆盖', () => {
    const fields = [{ b_id: '1', b_field: 'name', b_name: '姓名', b_i18n: null }]
    const flat = [{ b_id: '100', b_key: 'field.demo.name', b_locale: 'en-US', b_value: 'Name' }]
    let rows = reconcileI18nRows(
      buildI18nPivot(flat),
      collectManagedI18nItems({ module: demoModule(), fields, groups: [] }),
      { defaultLocale, languages },
    )
    // 改名后再次 reconcile
    rows = reconcileI18nRows(
      rows,
      collectManagedI18nItems({
        module: demoModule({ b_name: '演示模块V2' }),
        fields: [{ ...fields[0], b_name: '姓名V2' }],
        groups: [],
      }),
      { defaultLocale, languages },
    )
    const byKey = new Map(rows.map((r) => [r.b_key, r]))
    expect(byKey.get('module.demo')['zh-CN']).toBe('演示模块V2')
    expect(byKey.get('field.demo.name')['zh-CN']).toBe('姓名V2')
    expect(byKey.get('field.demo.name')['en-US']).toBe('Name')
  })

  it('字段删除后：无翻译的自动补齐行被清理，带翻译的保留为普通行', () => {
    const field = { b_id: '1', b_field: 'name', b_name: '姓名', b_i18n: null }
    const items = collectManagedI18nItems({ module: demoModule(), fields: [field], groups: [] })
    const rows = reconcileI18nRows(buildI18nPivot([]), items, { defaultLocale, languages })
    expect(rows.some((r) => r._managedId === 'field:field.demo.name')).toBe(true)

    // 字段消失：受管行无持久翻译，应被清理
    const next = reconcileI18nRows(rows, items.slice(0, 1), { defaultLocale, languages })
    expect(next.some((r) => r.b_key === 'field.demo.name')).toBe(false)
  })
})

describe('buildI18nChangeRequest 保存 diff', () => {
  const originalFlat = [
    { b_id: '100', b_key: 'field.demo.name', b_locale: 'en-US', b_value: 'Name' },
  ]

  function draftRows() {
    const items = collectManagedI18nItems({
      module: demoModule(),
      fields: [{ b_id: '1', b_field: 'name', b_name: '姓名', b_i18n: null }],
      groups: [],
    })
    return reconcileI18nRows(buildI18nPivot(originalFlat), items, { defaultLocale, languages })
  }

  it('首存新增受管默认语言 cell，已存在值不重复插入', () => {
    const req = buildI18nChangeRequest({
      draftRows: draftRows(),
      originalFlat,
      moduleId: '9',
      languages,
    })
    expect(req).not.toBeNull()
    const keys = (req.inserts || []).map((r) => `${r.b_key}|${r.b_locale}`).sort()
    expect(keys).toEqual(['field.demo.name|zh-CN', 'module.demo|zh-CN'])
    // 新增行 b_id 为负数临时 id（保存编排统一换真实主键）
    expect((req.inserts || []).every((r) => /^-\d+$/.test(String(r.b_id)))).toBe(true)
    // en-US 有主键且未变化 → 不产生 update
    expect(req.updates || []).toHaveLength(0)
  })

  it('修改语言值只产生对应 cell 的 update', () => {
    const rows = draftRows()
    rows.find((r) => r.b_key === 'field.demo.name')['en-US'] = 'NewName'
    const req = buildI18nChangeRequest({
      draftRows: rows,
      originalFlat,
      moduleId: '9',
      languages,
    })
    expect(req.updates.some((r) => r.b_id === '100' && r.b_value === 'NewName')).toBe(true)
  })

  it('与基线完全一致时不产生请求', () => {
    const originalAll = [
      ...originalFlat,
      { b_id: '101', b_key: 'module.demo', b_locale: 'zh-CN', b_value: '演示模块' },
      { b_id: '102', b_key: 'field.demo.name', b_locale: 'zh-CN', b_value: '姓名' },
    ]
    const items = collectManagedI18nItems({
      module: demoModule(),
      fields: [{ b_id: '1', b_field: 'name', b_name: '姓名', b_i18n: null }],
      groups: [],
    })
    const rows = reconcileI18nRows(buildI18nPivot(originalAll), items, {
      defaultLocale,
      languages,
    })
    const req = buildI18nChangeRequest({
      draftRows: rows,
      originalFlat: originalAll,
      moduleId: '9',
      languages,
    })
    expect(req).toBeNull()
  })
})