// 机构数据以扁平列表存储,前端/mock均通过 parentId 自行组装树
// org001 为一级机构(内置根机构),不可删除;admin 用户归属于此
export const orgs = [
  { id: 'org001', name: '总行', parentId: null, level: 1, remark: '内置根机构,不可删除', builtin: true, createdAt: '2026-01-01 00:00:00' },
  { id: 'org002', name: '华东分行', parentId: 'org001', level: 2, remark: '', builtin: false, createdAt: '2026-01-02 00:00:00' },
  { id: 'org003', name: '华南分行', parentId: 'org001', level: 2, remark: '', builtin: false, createdAt: '2026-01-02 00:00:00' },
  { id: 'org004', name: '上海分部', parentId: 'org002', level: 3, remark: '', builtin: false, createdAt: '2026-01-03 00:00:00' }
]

let seq = orgs.length

export function nextOrgId() {
  seq += 1
  return `org${String(seq).padStart(3, '0')}`
}

export function buildOrgTree(list) {
  const map = new Map(list.map((o) => [o.id, { ...o, children: [] }]))
  const roots = []
  map.forEach((node) => {
    if (node.parentId && map.has(node.parentId)) {
      map.get(node.parentId).children.push(node)
    } else {
      roots.push(node)
    }
  })
  return roots
}

export function collectDescendantIds(list, id) {
  const result = []
  const children = list.filter((o) => o.parentId === id)
  children.forEach((c) => {
    result.push(c.id)
    result.push(...collectDescendantIds(list, c.id))
  })
  return result
}