export type JsonBody = Record<string, unknown> | unknown[]

const corsHeaders = {
  'Access-Control-Allow-Origin': '*',
  'Access-Control-Allow-Headers': 'Content-Type, Authorization',
  'Access-Control-Allow-Methods': 'GET, POST, PUT, PATCH, DELETE, OPTIONS'
}

export const json = (body: JsonBody, init: ResponseInit = {}) =>
  Response.json(body, {
    ...init,
    headers: {
      'Content-Type': 'application/json',
      ...corsHeaders,
      ...(init.headers || {})
    }
  })

export const ok = (data: unknown = null) => json({ success: true, data })

export const fail = (message: string, status = 400, code = 'BAD_REQUEST') =>
  json({ success: false, error: { code, message } }, { status })

export const methodNotAllowed = (allowedMethods: string[]) =>
  json(
    { success: false, error: { code: 'METHOD_NOT_ALLOWED', message: '请求方式不支持' } },
    {
      status: 405,
      headers: {
        ...corsHeaders,
        Allow: allowedMethods.join(', ')
      }
    }
  )

export const handleOptions = () =>
  new Response(null, {
    status: 204,
    headers: corsHeaders
  })