import type { SystemLabelTemplate, SystemTemplateElementBase } from '../print/types/printer'

function normalizePaletteSlug (raw: string): string {
  return String(raw ?? '').trim().toLowerCase().replace(/[^a-z0-9]+/g, '')
}

function readTypeAdd (el: SystemTemplateElementBase): string {
  return String((el as SystemTemplateElementBase & { typeAdd?: string }).typeAdd ?? '').trim().toLowerCase()
}

/** 当前登录用户展示名（与侧栏 / Profile 一致） */
export function getLoggedInEmployeeDisplayName (): string {
  const name = String(uni.getStorageSync('userName') || '').trim()
  if (name) return name
  const email = String(uni.getStorageSync('user_email') || '').trim()
  if (email) {
    const at = email.indexOf('@')
    return at > 0 ? email.slice(0, at) : email
  }
  return 'Employee'
}

/** 是否为模板「Entered Automatically → Employee」控件 */
export function isEmployeeTemplateElement (el: SystemTemplateElementBase): boolean {
  const typeAdd = readTypeAdd(el)
  if (typeAdd.startsWith('auto_') && typeAdd.includes('employee')) return true

  const en = normalizePaletteSlug(String(el.elementName ?? ''))
  if (/^employee\d*$/.test(en)) return true

  const vst = String(el.valueSourceType ?? '').toUpperCase()
  const type = String(el.type ?? '').toUpperCase()
  if (vst === 'AUTO_DB' && type === 'TEXT_STATIC' && /^employee/.test(en)) return true

  return false
}

export function templateIncludesEmployeeElement (
  template: SystemLabelTemplate | null | undefined,
): boolean {
  return !!(template?.elements?.some(isEmployeeTemplateElement))
}

/** 将当前登录人姓名写入 Employee AUTO 控件（预览/出纸同源） */
export function applyEmployeeDisplayToTemplate (
  template: SystemLabelTemplate,
  employeeName?: string | null,
): SystemLabelTemplate {
  const name = String(employeeName ?? '').trim() || getLoggedInEmployeeDisplayName()
  const elements = (template.elements || []).map((el) => {
    if (!isEmployeeTemplateElement(el)) return el
    const cfg = { ...(el.config || {}) } as Record<string, unknown>
    return {
      ...el,
      config: { ...cfg, text: name, Text: name },
    }
  })
  return { ...template, elements }
}