import { defineStore } from 'pinia'
import { ref } from 'vue'

/** Apps that set X-Frame-Options and/or don't support subpath proxy - open in new tab for correct display */
function mustOpenInNewTab(url: string): boolean {
  try {
    const u = new URL(url)
    return (
      u.port === '23000' || // BTCPay
      u.port === '8123' || // Home Assistant
      u.port === '8085' || // Nextcloud (subpath breaks CSS/assets)
      u.port === '2283'    // Immich (subpath breaks SPA)
    )
  } catch {
    return false
  }
}

/** Rewrite to same-origin proxy so iframe can embed (nginx strips X-Frame-Options) */
function toEmbeddableUrl(url: string): string {
  try {
    const u = new URL(url)
    const origin = window.location.origin
    // Only Vaultwarden and Penpot support subpath proxy; Nextcloud/Immich open in new tab
    if (u.port === '8082') return `${origin}/app/vaultwarden/`
    if (u.port === '9001') return `${origin}/app/penpot/`
  } catch {
    /* ignore */
  }
  return url
}

export const useAppLauncherStore = defineStore('appLauncher', () => {
  const isOpen = ref(false)
  const url = ref('')
  const title = ref('')
  let previousActiveElement: HTMLElement | null = null

  function open(payload: { url: string; title: string; openInNewTab?: boolean }) {
    if (payload.openInNewTab || mustOpenInNewTab(payload.url)) {
      window.open(payload.url, '_blank', 'noopener,noreferrer')
      return
    }
    previousActiveElement = (document.activeElement as HTMLElement) || null
    url.value = toEmbeddableUrl(payload.url)
    title.value = payload.title
    isOpen.value = true
  }

  function close() {
    const toRestore = previousActiveElement
    previousActiveElement = null
    isOpen.value = false
    url.value = ''
    title.value = ''
    if (toRestore && typeof toRestore.focus === 'function') {
      requestAnimationFrame(() => {
        toRestore.focus()
      })
    }
  }

  return {
    isOpen,
    url,
    title,
    open,
    close,
  }
})