import { useAppStore } from '@/stores/app'

async function parseErrorMessage(response: Response): Promise<string> {
  try {
    const contentType = response.headers.get('content-type') || ''
    if (contentType.includes('application/json')) {
      const body = await response.json().catch(() => null)
      if (body?.detail) {
        if (Array.isArray(body.detail)) {
          const lines = body.detail
            .map((e: { loc?: string[]; msg?: string }) => {
              const loc = Array.isArray(e?.loc) ? e.loc.join('.') : ''
              const msg = e?.msg ? String(e.msg) : '校验失败'
              return loc ? `${loc}: ${msg}` : msg
            })
            .filter(Boolean)
          return lines.length ? lines.join('\n') : '请求校验失败'
        }
        if (typeof body.detail === 'object') return JSON.stringify(body.detail)
        return String(body.detail)
      }
      if (body?.message) return String(body.message)
      return '请求失败'
    }
    const text = await response.text().catch(() => '')
    const normalized = (text || '').trim()
    if (!normalized) return '请求失败'
    return normalized.length > 200 ? normalized.slice(0, 200) + '...' : normalized
  } catch {
    return '请求失败'
  }
}

export async function apiRequest<T = any>(url: string, options: RequestInit = {}): Promise<T> {
  const store = useAppStore()
  const headers: Record<string, string> = {
    'Content-Type': 'application/json',
    ...(options.headers as Record<string, string> || {}),
  }

  if (store.token) {
    headers['Authorization'] = `Bearer ${store.token}`
  }

  const response = await fetch(url, { ...options, headers })

  if (response.status === 401) {
    store.user = null
    store.token = null
    localStorage.removeItem('token')
    localStorage.removeItem('user')
    throw new Error('登录已过期，请重新登录')
  }

  if (!response.ok) {
    const message = await parseErrorMessage(response)
    throw new Error(message)
  }

  return response.json()
}