import { ref, computed } from 'vue'

export interface PlatformUser {
  userId: string
  userName: string
  userRole: string
  tenantId: string
  orgId: string
}

const ROLES = [
  { key: 'ADMIN', label: '系统管理员' },
  { key: 'RECEPTIONIST', label: '受理员' },
  { key: 'ASSESSOR', label: '评估员' },
  { key: 'PLANNER', label: '方案制定员' },
  { key: 'DISPATCHER', label: '调度员' },
  { key: 'STAFF', label: '服务人员' },
  { key: 'SETTLER', label: '结算员' },
  { key: 'SUPERVISOR', label: '监管员' },
  { key: 'REVIEWER', label: '复核员' },
]

const PRESET_USERS: Record<string, PlatformUser> = {
  admin: { userId: '1', userName: '系统管理员', userRole: 'ADMIN', tenantId: '1', orgId: '1' },
  receptionist: { userId: '2', userName: '受理员小王', userRole: 'RECEPTIONIST', tenantId: '1', orgId: '1' },
  assessor: { userId: '3', userName: '评估员老张', userRole: 'ASSESSOR', tenantId: '1', orgId: '1' },
  planner: { userId: '4', userName: '方案员小李', userRole: 'PLANNER', tenantId: '1', orgId: '1' },
  dispatcher: { userId: '5', userName: '调度员老赵', userRole: 'DISPATCHER', tenantId: '1', orgId: '1' },
  staff: { userId: '6', userName: '护理员老陈', userRole: 'STAFF', tenantId: '1', orgId: '1' },
  settler: { userId: '7', userName: '结算员小周', userRole: 'SETTLER', tenantId: '1', orgId: '1' },
  supervisor: { userId: '8', userName: '监管员老刘', userRole: 'SUPERVISOR', tenantId: '1', orgId: '1' },
}

const STORAGE_KEY = 'hss_platform_user'

const currentUser = ref<PlatformUser | null>(null)

function loadUser(): PlatformUser | null {
  try {
    const stored = localStorage.getItem(STORAGE_KEY)
    return stored ? JSON.parse(stored) : null
  } catch { return null }
}

function saveUser(user: PlatformUser) {
  localStorage.setItem(STORAGE_KEY, JSON.stringify(user))
  currentUser.value = user
}

function clearUser() {
  localStorage.removeItem(STORAGE_KEY)
  currentUser.value = null
}

export function usePlatformAuth() {
  if (!currentUser.value) {
    currentUser.value = loadUser()
  }

  const isLoggedIn = computed(() => !!currentUser.value)
  const user = computed(() => currentUser.value)

  function login(username: string): PlatformUser | null {
    const u = PRESET_USERS[username.toLowerCase()]
    if (u) { saveUser(u); return u }
    return null
  }

  function logout() { clearUser() }

  function switchRole(roleKey: string) {
    if (!currentUser.value) return
    const updated = { ...currentUser.value, userRole: roleKey }
    saveUser(updated)
  }

  function getAuthHeaders(): Record<string, string> {
    const u = currentUser.value
    if (!u) return {}
    return {
      'X-User-Id': u.userId,
      'X-User-Role': u.userRole,
      'X-Tenant-Id': u.tenantId,
      'X-Org-Id': u.orgId,
      'Content-Type': 'application/json',
    }
  }

  return { isLoggedIn, user, login, logout, switchRole, getAuthHeaders, ROLES, PRESET_USERS }
}