export type KnowledgeCategory =
  | 'exam_policy'
  | 'school_intro'
  | 'major_guide'
  | 'study_method'
  | 'experience'
  | 'policy'
  | 'company'
  | 'guide'
  | 'announcement'

export interface KnowledgeArticle {
  id: string
  title: string
  summary: string
  content: string
  category: KnowledgeCategory
  tags: string[]
  coverImage?: string
  author?: string
  isTop?: boolean
  publishedAt?: string
  createdAt?: string
  updatedAt?: string
  viewCount: number
}

export const categoryLabel: Record<string, string> = {
  exam_policy: '考试政策',
  school_intro: '院校介绍',
  major_guide: '专业指南',
  study_method: '复习规划',
  experience: '学长经验',
  policy: '政策解读',
  company: '集团新闻',
  guide: '备考指南',
  announcement: '公告通知',
}

export const categories: { key: KnowledgeCategory | ''; label: string }[] = [
  { key: '', label: '全部' },
  { key: 'exam_policy', label: '考试政策' },
  { key: 'school_intro', label: '院校专业' },
  { key: 'major_guide', label: '专业指南' },
  { key: 'study_method', label: '复习规划' },
  { key: 'experience', label: '学长经验' },
]

export function formatDate(dateStr?: string) {
  if (!dateStr) return ''
  return new Date(dateStr).toLocaleDateString('zh-CN', { year: 'numeric', month: 'long', day: 'numeric' })
}

export function formatViewCount(count: number) {
  if (count >= 10000) return `${(count / 10000).toFixed(1)}w+`
  if (count >= 1000) return `${(count / 1000).toFixed(1)}k`
  return String(count)
}