import { existsSync, readFileSync } from 'node:fs'
import { join } from 'node:path'
import { defineEventHandler, getRequestURL, send, setResponseHeader } from 'h3'

const FAVICON_PATHS = [
  '/favicon.ico',
  '/favicon.png',
  '/landing/favicon.ico',
  '/landing/favicon.png',
]

function resolveFaviconFile() {
  const candidates = [
    join(process.cwd(), 'src', 'public', 'favicon.png'),
    join(process.cwd(), 'public', 'favicon.png'),
  ]
  for (const path of candidates) {
    if (existsSync(path)) return path
  }
  return null
}

/**
 * سرو مستقیم favicon تا درخواست‌های روت و /landing
 * وارد Vue Router نشوند و هشدار No match ندهند.
 */
export default defineEventHandler((event) => {
  const { pathname } = getRequestURL(event)
  if (!FAVICON_PATHS.includes(pathname)) return

  const file = resolveFaviconFile()
  if (!file) return

  setResponseHeader(event, 'Content-Type', 'image/png')
  setResponseHeader(event, 'Cache-Control', 'public, max-age=86400')
  return send(event, readFileSync(file))
})