/**
 * dataChanges.diffRow（单条记录字段级差异比对）测试：
 * 语义对齐旧系统 diffData 的单表分支 —— 无基线视为新建（整行 insert），
 * 修改时 updates 只携带「变化字段 + 主键」，内置 null/''/undefined 等价、
 * 数字型等价与 _/v_/ignoreFields 过滤；主键默认 'b_id'，可自定义。
 */
import { describe, expect, it } from 'vitest'
import { diffRow } from '@/utils/dataChanges'

describe('diffRow 单条记录', () => {
  it('无基线时视为新建，返回整行 insert', () => {
    const changes = diffRow({
      current: { b_id: '1', b_code: 'demo', b_name: '演示模块' },
      original: null,
    })
    expect(changes.hasChanges).toBe(true)
    expect(changes.inserts).toEqual([{ b_id: '1', b_code: 'demo', b_name: '演示模块' }])
    expect(changes.updates).toHaveLength(0)
  })

  it('与基线完全一致时 hasChanges 为 false（不产生仅主键的空 update）', () => {
    const original = { b_id: '1', b_code: 'demo', b_name: '演示模块' }
    const changes = diffRow({ current: { ...original }, original })
    expect(changes.hasChanges).toBe(false)
    expect(changes.updates).toHaveLength(0)
  })

  it('修改只提交变化字段 + 主键', () => {
    const original = { b_id: '1', b_code: 'demo', b_name: '演示模块', b_xh: 10 }
    const changes = diffRow({
      current: { b_id: '1', b_code: 'demo', b_name: '改名后', b_xh: 10 },
      original,
    })
    expect(changes.updates).toEqual([{ b_id: '1', b_name: '改名后' }])
  })

  it('null/undefined/空串 与数字型（40 vs "40.00"）归一后不误报变更', () => {
    const original = { b_id: '1', b_name: '演示', b_code: null, b_xh: 40 }
    const changes = diffRow({
      current: { b_id: '1', b_name: '演示', b_code: '', b_xh: '40.00' },
      original,
    })
    expect(changes.hasChanges).toBe(false)
  })

  it('跳过 _ 前缀与 v_ 前缀字段，ignoreFields 不参与比较', () => {
    const original = {
      b_id: '1',
      b_name: '演示',
      _treeKey: 'x',
      v_customer_name: 'A',
      b_currentperiod: '2026-01',
    }
    const changes = diffRow({
      current: {
        b_id: '1',
        b_name: '演示',
        _treeKey: 'y', // 内部字段变化不影响
        v_customer_name: 'B', // 视图字段变化不影响
        b_currentperiod: '2026-02', // ignoreFields 内，不影响
      },
      original,
      ignoreFields: ['b_currentperiod'],
    })
    expect(changes.hasChanges).toBe(false)
  })

  it('insert 行剔除 _/v_/ignoreFields 前缀字段', () => {
    const changes = diffRow({
      current: { b_id: '1', b_name: '新', _ui: true, v_view: 'x', b_xh: 10 },
      original: null,
      ignoreFields: ['b_xh'],
    })
    expect(changes.inserts).toEqual([{ b_id: '1', b_name: '新' }])
  })

  it('支持非默认主键（primaryKey）', () => {
    const original = { gid: '7', b_name: '旧' }
    const changes = diffRow({
      current: { gid: '7', b_name: '新' },
      original,
      primaryKey: 'gid',
    })
    expect(changes.updates).toEqual([{ gid: '7', b_name: '新' }])
  })
})