import { defineStore } from 'pinia'
import { ref, watch } from 'vue'
import { rpcClient } from '@/api/rpc-client'

/** Apps that set X-Frame-Options or CSP frame-ancestors, blocking iframe embedding.
 *  Verified by checking response headers from each app container.
 *  These always open in a new tab. Other apps load in the iframe overlay.
 */
/** Hostnames of external sites that block iframes via X-Frame-Options or CSP.
 *  Sites listed here that also appear in EXTERNAL_PROXY will be proxied (not blocked).
 */
const IFRAME_BLOCKED_HOSTS: string[] = []

/** External sites proxied through nginx path-based locations (strips X-Frame-Options).
 *  Uses /ext/{key}/ paths on the main nginx port so it works over Tailscale too. */
const EXTERNAL_PROXY_PATH: Record<string, string> = {
  'botfights.net': '/ext/botfights/',
  '484.kitchen': '/ext/484-kitchen/',
  'present.l484.com': '/ext/arch-presentation/',
}

function mustOpenInNewTab(url: string): boolean {
  try {
    const u = new URL(url)
    // External sites that block iframes
    if (IFRAME_BLOCKED_HOSTS.some(h => u.hostname === h || u.hostname.endsWith(`.${h}`))) {
      return true
    }
    // Local apps with X-Frame-Options or CSP frame-ancestors blocking iframes
    if (
      u.port === '23000' || // BTCPay — X-Frame-Options: DENY
      u.port === '3000' ||  // Grafana — X-Frame-Options: deny
      u.port === '8082' ||  // Vaultwarden — X-Frame-Options: SAMEORIGIN + CSP frame-ancestors
      u.port === '2342' ||  // PhotoPrism — X-Frame-Options: DENY + CSP frame-ancestors: 'none'
      u.port === '8085' ||  // Nextcloud — X-Frame-Options: SAMEORIGIN
      u.port === '3001' ||  // Uptime Kuma — X-Frame-Options: SAMEORIGIN
      u.port === '8123'     // Home Assistant — X-Frame-Options: SAMEORIGIN
    ) {
      return true
    }
    return false
  } catch {
    return false
  }
}

/** Port → proxy path for apps (nginx strips X-Frame-Options + avoids mixed content) */
const PORT_TO_PROXY: Record<string, string> = {
  '81': '/app/nginx-proxy-manager/',
  '3000': '/app/grafana/',
  '3001': '/app/uptime-kuma/',
  '8080': '/app/endurain/',
  '8081': '/app/lnd/',
  '8082': '/app/vaultwarden/',
  '8083': '/app/filebrowser/',
  '8085': '/app/nextcloud/',
  '8096': '/app/jellyfin/',
  '8123': '/app/homeassistant/',
  '8240': '/app/tailscale/',
  '8334': '/app/bitcoin-ui/',
  '8888': '/app/searxng/',
  '9000': '/app/portainer/',
  '9001': '/app/penpot/',
  '9980': '/app/onlyoffice/',
  '11434': '/app/ollama/',
  '2283': '/app/immich/',
  '23000': '/app/btcpay/',
  '2342': '/app/photoprism/',
  '4080': '/app/mempool/',
  '50002': '/app/electrs/',
  '8175': '/app/fedimint/',
  '8176': '/app/fedimint-gateway/',
  '3100': '/app/dwn/',
  '18081': '/app/nostr-rs-relay/',
}

/** Rewrite to same-origin proxy ONLY when needed for HTTPS mixed-content.
 *  On HTTP, direct port URLs are used — they avoid subpath routing issues
 *  (apps' root-relative asset paths like /static/main.js break under /app/xxx/).
 *  On HTTPS, must proxy to avoid mixed-content blocks; nginx also strips X-Frame-Options.
 */
function toEmbeddableUrl(url: string): string {
  try {
    const u = new URL(url)
    const origin = window.location.origin

    // External sites proxied through nginx path-based locations
    const extPath = EXTERNAL_PROXY_PATH[u.hostname]
    if (extPath) {
      return `${origin}${extPath}`
    }

    const proxyPath = PORT_TO_PROXY[u.port]
    const sameHost = u.hostname === window.location.hostname
    const needsProxy = window.location.protocol === 'https:' && u.protocol === 'http:'
    if (proxyPath && sameHost && needsProxy) {
      return `${origin}${proxyPath}`
    }
  } 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)) {
      // New tab: always use direct port URL so app assets load correctly
      window.open(payload.url, '_blank', 'noopener,noreferrer')
      return
    }
    const embeddableUrl = toEmbeddableUrl(payload.url)
    previousActiveElement = (document.activeElement as HTMLElement) || null
    url.value = embeddableUrl
    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()
      })
    }
  }

  // NIP-07 postMessage handler — responds to nostr-request from iframe apps
  async function handleNostrRequest(event: MessageEvent) {
    if (!event.data || event.data.type !== 'nostr-request') return
    const { id, method, params } = event.data
    const source = event.source as Window | null
    if (!source) return

    try {
      let result: unknown
      if (method === 'getPublicKey') {
        const res = await rpcClient.call<{ nostr_pubkey: string }>({ method: 'node.nostr-pubkey' })
        result = res.nostr_pubkey
      } else if (method === 'signEvent') {
        const res = await rpcClient.call<unknown>({ method: 'identity.nostr-sign', params: { event: params.event } })
        result = res
      } else if (method === 'getRelays') {
        result = {}
      } else {
        throw new Error(`Unsupported NIP-07 method: ${method}`)
      }
      source.postMessage({ type: 'nostr-response', id, result }, '*')
    } catch (err) {
      const message = err instanceof Error ? err.message : 'Unknown error'
      source.postMessage({ type: 'nostr-response', id, error: message }, '*')
    }
  }

  // Listen for NIP-07 requests only while an app is open
  watch(isOpen, (open) => {
    if (open) {
      window.addEventListener('message', handleNostrRequest)
    } else {
      window.removeEventListener('message', handleNostrRequest)
    }
  })

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