// RPC Client for connecting to Archipelago backend

export interface RPCOptions {
  method: string
  params?: Record<string, unknown>
  timeout?: number
}

export interface RPCResponse<T> {
  result?: T
  error?: {
    code: number
    message: string
    data?: unknown
  }
}

function getCsrfToken(): string | null {
  const match = document.cookie.match(/(?:^|;\s*)csrf_token=([^;]+)/)
  if (match) return match[1]!
  // Fallback: check for a meta tag (useful when cookies are blocked or not yet set)
  return document.querySelector('meta[name="csrf-token"]')?.getAttribute('content') ?? null
}

class RPCClient {
  private static _sessionExpiredRedirecting = false
  private baseUrl: string

  constructor(baseUrl: string = '/rpc/v1') {
    this.baseUrl = baseUrl
  }

  async call<T>(options: RPCOptions): Promise<T> {
    const { method, params = {}, timeout = 15000 } = options
    const maxRetries = 3

    for (let attempt = 0; attempt < maxRetries; attempt++) {
      const controller = new AbortController()
      const timeoutId = setTimeout(() => controller.abort(), timeout)

      try {
        const headers: Record<string, string> = {
          'Content-Type': 'application/json',
        }
        const csrfToken = getCsrfToken()
        if (csrfToken) {
          headers['X-CSRF-Token'] = csrfToken
        }

        const response = await fetch(this.baseUrl, {
          method: 'POST',
          credentials: 'include', // Important for session cookies
          headers,
          body: JSON.stringify({ method, params }),
          signal: controller.signal,
        })

        clearTimeout(timeoutId)

        if (!response.ok) {
          // Session expired — debounced redirect to login
          // Use a single shared timeout to prevent redirect storms when
          // multiple parallel requests all get 401 at once
          if (response.status === 401 && method !== 'auth.login') {
            if (!RPCClient._sessionExpiredRedirecting) {
              RPCClient._sessionExpiredRedirecting = true
              setTimeout(() => {
                window.location.href = '/login'
              }, 300)
            }
            throw new Error('Session expired')
          }
          // CSRF 403: retry once after short delay (cookie may have been
          // updated by a concurrent Set-Cookie response not yet visible to JS)
          if (response.status === 403 && attempt < maxRetries - 1) {
            await new Promise((r) => setTimeout(r, 300))
            continue
          }
          const err = new Error(`HTTP ${response.status}: ${response.statusText}`)
          const isRetryable = response.status === 502 || response.status === 503
          if (isRetryable && attempt < maxRetries - 1) {
            const delay = 600 * (attempt + 1)
            await new Promise((r) => setTimeout(r, Math.floor(delay * (0.5 + Math.random() * 0.5))))
            continue
          }
          throw err
        }

        const data: RPCResponse<T> = await response.json()

        if (data.error) {
          throw new Error(data.error.message || 'RPC Error')
        }

        return data.result as T
      } catch (error) {
        clearTimeout(timeoutId)
        if (error instanceof Error) {
          if (error.name === 'AbortError') {
            const timeoutErr = new Error('Request timeout')
            if (attempt < maxRetries - 1) {
              const delay = 600 * (attempt + 1)
              await new Promise((r) => setTimeout(r, Math.floor(delay * (0.5 + Math.random() * 0.5))))
              continue
            }
            throw timeoutErr
          }
          const msg = error.message
          const isRetryable = /502|503|Bad Gateway|fetch|network/i.test(msg)
          if (isRetryable && attempt < maxRetries - 1) {
            const delay = 600 * (attempt + 1)
            await new Promise((r) => setTimeout(r, Math.floor(delay * (0.5 + Math.random() * 0.5))))
            continue
          }
          throw error
        }
        throw new Error('Unknown error occurred')
      }
    }

    throw new Error('Request failed after retries')
  }

  // Convenience methods
  async login(password: string): Promise<{ requires_totp?: boolean } | null> {
    return this.call({
      method: 'auth.login',
      params: {
        password,
      },
    })
  }

  async loginTotp(code: string): Promise<{ success: boolean }> {
    return this.call({ method: 'auth.login.totp', params: { code } })
  }

  async loginBackup(code: string): Promise<{ success: boolean }> {
    return this.call({ method: 'auth.login.backup', params: { code } })
  }

  async totpSetupBegin(password: string): Promise<{
    qr_svg: string
    secret_base32: string
    pending_token: string
  }> {
    return this.call({ method: 'auth.totp.setup.begin', params: { password } })
  }

  async totpSetupConfirm(params: {
    code: string
    password: string
    pendingToken: string
  }): Promise<{ enabled: boolean; backup_codes: string[] }> {
    return this.call({ method: 'auth.totp.setup.confirm', params })
  }

  async totpDisable(password: string, code: string): Promise<{ disabled: boolean }> {
    return this.call({ method: 'auth.totp.disable', params: { password, code } })
  }

  async totpStatus(): Promise<{ enabled: boolean }> {
    return this.call({ method: 'auth.totp.status', params: {} })
  }

  async changePassword(params: {
    currentPassword: string
    newPassword: string
    alsoChangeSsh?: boolean
  }): Promise<{ success: boolean }> {
    return this.call({
      method: 'auth.changePassword',
      params: {
        currentPassword: params.currentPassword,
        newPassword: params.newPassword,
        alsoChangeSsh: params.alsoChangeSsh ?? true,
      },
    })
  }

  async logout(): Promise<void> {
    return this.call({
      method: 'auth.logout',
      params: {},
    })
  }

  async completeOnboarding(): Promise<boolean> {
    return this.call({
      method: 'auth.onboardingComplete',
      params: {},
    })
  }

  async isOnboardingComplete(): Promise<boolean> {
    return this.call({
      method: 'auth.isOnboardingComplete',
      params: {},
    })
  }

  async resetOnboarding(): Promise<boolean> {
    return this.call({
      method: 'auth.resetOnboarding',
      params: {},
    })
  }

  async getNodeDid(): Promise<{ did: string; pubkey: string }> {
    return this.call({
      method: 'node.did',
      params: {},
    })
  }

  async signChallenge(challenge: string): Promise<{ signature: string }> {
    return this.call({
      method: 'node.signChallenge',
      params: { challenge },
    })
  }

  async createBackup(passphrase: string): Promise<{
    version: number
    did: string
    pubkey: string
    kid: string
    encrypted: boolean
    blob: string
    timestamp: string
  }> {
    return this.call({
      method: 'node.createBackup',
      params: { passphrase },
    })
  }

  async resolveDid(did?: string): Promise<Record<string, unknown>> {
    return this.call({
      method: 'identity.resolve-did',
      params: did ? { did } : {},
    })
  }

  async createPresentation(params: {
    holderId: string
    credentialIds: string[]
  }): Promise<Record<string, unknown>> {
    return this.call({
      method: 'identity.create-presentation',
      params: { holder_id: params.holderId, credential_ids: params.credentialIds },
    })
  }

  async verifyPresentation(presentation: Record<string, unknown>): Promise<{
    valid: boolean
    holder_valid: boolean
    credentials: Array<{ id: string; valid: boolean; revoked: boolean }>
  }> {
    return this.call({
      method: 'identity.verify-presentation',
      params: { presentation },
    })
  }

  async createPsbt(params: {
    outputs: Array<{ address: string; amount_sats: number }>
    feeRateSatPerVbyte?: number
  }): Promise<{
    psbt_base64: string
    change_output_index: number
    total_amount_sats: number
    fee_rate_sat_per_vbyte: number
  }> {
    return this.call({
      method: 'lnd.create-psbt',
      params: {
        outputs: params.outputs,
        fee_rate_sat_per_vbyte: params.feeRateSatPerVbyte ?? 10,
      },
    })
  }

  async finalizePsbt(signedPsbtBase64: string): Promise<{
    raw_final_tx: string
    broadcast: boolean
  }> {
    return this.call({
      method: 'lnd.finalize-psbt',
      params: { signed_psbt_base64: signedPsbtBase64 },
    })
  }

  async publishNostrIdentity(): Promise<{ event_id: string; success: number; failed: number }> {
    return this.call({
      method: 'node.nostr-publish',
      params: {},
    })
  }

  async getNostrPubkey(): Promise<{ nostr_pubkey: string; nostr_npub?: string }> {
    return this.call({
      method: 'node.nostr-pubkey',
      params: {},
    })
  }

  async listPeers(): Promise<{ peers: Array<{ onion: string; pubkey: string; name?: string }> }> {
    return this.call({
      method: 'node-list-peers',
      params: {},
    })
  }

  async addPeer(params: { onion: string; pubkey: string; name?: string }): Promise<{ peers: unknown[] }> {
    return this.call({
      method: 'node-add-peer',
      params,
    })
  }

  async removePeer(pubkey: string): Promise<{ peers: unknown[] }> {
    return this.call({
      method: 'node-remove-peer',
      params: { pubkey },
    })
  }

  async sendMessageToPeer(onion: string, message: string): Promise<{ ok: boolean; sent_to: string }> {
    return this.call({
      method: 'node-send-message',
      params: { onion, message },
      timeout: 90000,
    })
  }

  async checkPeerReachable(onion: string): Promise<{ onion: string; reachable: boolean }> {
    return this.call({
      method: 'node-check-peer',
      params: { onion },
      timeout: 35000,
    })
  }

  async getReceivedMessages(): Promise<{ messages: Array<{ from_pubkey: string; message: string; timestamp: string }> }> {
    return this.call({
      method: 'node-messages-received',
      params: {},
    })
  }

  async discoverNodes(): Promise<{ nodes: Array<{ did: string; onion: string; pubkey: string; node_address: string }> }> {
    return this.call({
      method: 'node-nostr-discover',
      params: {},
      timeout: 20000,
    })
  }

  async getTorAddress(): Promise<{ tor_address: string | null }> {
    return this.call({
      method: 'node.tor-address',
      params: {},
    })
  }

  async torListServices(): Promise<{ services: Array<{ name: string; local_port: number; onion_address: string | null; enabled: boolean }> }> {
    return this.call({ method: 'tor.list-services' })
  }

  async torRotateService(name: string): Promise<{ rotated: boolean; name: string; old_onion: string | null; new_onion: string | null; transition_hours: number }> {
    return this.call({ method: 'tor.rotate-service', params: { name } })
  }

  async torToggleApp(appId: string, enabled: boolean): Promise<{ app_id: string; enabled: boolean; changed: boolean; onion_address: string | null }> {
    return this.call({ method: 'tor.toggle-app', params: { app_id: appId, enabled } })
  }

  async torCleanupRotated(): Promise<{ cleaned: string[]; count: number }> {
    return this.call({ method: 'tor.cleanup-rotated' })
  }

  async verifyNostrRevoked(): Promise<{
    revoked: boolean
    nostr_pubkey: string
    latest_content?: string
    error?: string
  }> {
    return this.call({
      method: 'node-nostr-verify-revoked',
      params: {},
      timeout: 25000,
    })
  }

  async echo(message: string): Promise<string> {
    return this.call({
      method: 'server.echo',
      params: { message },
    })
  }

  async getSystemTime(): Promise<{ now: string; uptime: number }> {
    return this.call({
      method: 'server.time',
      params: {},
    })
  }

  async getMetrics(): Promise<Record<string, unknown>> {
    return this.call({
      method: 'server.metrics',
      params: {},
    })
  }

  async updateServer(marketplaceUrl: string): Promise<'updating' | 'no-updates'> {
    return this.call({
      method: 'server.update',
      params: { 'marketplace-url': marketplaceUrl },
    })
  }

  async detectUsbDevices(): Promise<{
    devices: Array<{
      type: string
      vendor_id: string
      product_id: string
      manufacturer: string
      product: string
    }>
  }> {
    return this.call({
      method: 'system.detect-usb-devices',
      params: {},
    })
  }

  async restartServer(): Promise<void> {
    return this.call({
      method: 'server.restart',
      params: {},
    })
  }

  async shutdownServer(): Promise<void> {
    return this.call({
      method: 'server.shutdown',
      params: {},
    })
  }

  async installPackage(id: string, marketplaceUrl: string, version: string): Promise<string> {
    return this.call({
      method: 'package.install',
      params: { id, 'marketplace-url': marketplaceUrl, version },
    })
  }

  async uninstallPackage(id: string): Promise<void> {
    return this.call({
      method: 'package.uninstall',
      params: { id },
    })
  }

  async startPackage(id: string): Promise<void> {
    return this.call({
      method: 'package.start',
      params: { id },
    })
  }

  async stopPackage(id: string): Promise<void> {
    return this.call({
      method: 'package.stop',
      params: { id },
    })
  }

  async restartPackage(id: string): Promise<void> {
    return this.call({
      method: 'package.restart',
      params: { id },
    })
  }

  async getMarketplace(url: string): Promise<Record<string, unknown>> {
    return this.call({
      method: 'marketplace.get',
      params: { url },
    })
  }

  // Federation
  async federationInvite(): Promise<{ code: string; did: string; onion: string }> {
    return this.call({
      method: 'federation.invite',
      params: {},
    })
  }

  async federationJoin(code: string): Promise<{
    joined: boolean
    node: { did: string; onion: string; pubkey: string; trust_level: string }
  }> {
    return this.call({
      method: 'federation.join',
      params: { code },
    })
  }

  async federationListNodes(): Promise<{
    nodes: Array<{
      did: string
      pubkey: string
      onion: string
      trust_level: string
      added_at: string
      name?: string
      last_seen?: string
      last_state?: {
        timestamp: string
        apps: Array<{ id: string; status: string; version?: string }>
        cpu_usage_percent?: number
        mem_used_bytes?: number
        mem_total_bytes?: number
        disk_used_bytes?: number
        disk_total_bytes?: number
        uptime_secs?: number
        tor_active?: boolean
      }
    }>
  }> {
    return this.call({
      method: 'federation.list-nodes',
      params: {},
    })
  }

  async federationRemoveNode(did: string): Promise<{ removed: boolean; nodes_remaining: number }> {
    return this.call({
      method: 'federation.remove-node',
      params: { did },
    })
  }

  async federationSetTrust(
    did: string,
    trustLevel: 'trusted' | 'observer' | 'untrusted',
  ): Promise<{ updated: boolean; did: string; trust_level: string }> {
    return this.call({
      method: 'federation.set-trust',
      params: { did, trust_level: trustLevel },
    })
  }

  async federationSyncState(): Promise<{
    synced: number
    failed: number
    results: Array<{ did: string; status: string; apps?: number; error?: string }>
  }> {
    return this.call({
      method: 'federation.sync-state',
      params: {},
      timeout: 120000,
    })
  }

  async federationDeployApp(params: {
    did: string
    appId: string
    version?: string
    marketplaceUrl?: string
  }): Promise<{ deployed: boolean; app_id: string; peer_did: string; peer_onion: string }> {
    return this.call({
      method: 'federation.deploy-app',
      params: {
        did: params.did,
        app_id: params.appId,
        version: params.version ?? 'latest',
        marketplace_url: params.marketplaceUrl ?? '',
      },
      timeout: 180000,
    })
  }

  // VPN
  async vpnStatus(): Promise<{
    connected: boolean
    provider?: string
    interface?: string
    ip_address?: string
    hostname?: string
    peers_connected: number
    bytes_in: number
    bytes_out: number
    configured: boolean
    configured_provider: string
  }> {
    return this.call({
      method: 'vpn.status',
      params: {},
    })
  }

  async vpnConfigure(params: {
    provider: 'tailscale' | 'wireguard'
    auth_key?: string
    address?: string
    dns?: string
    peer?: {
      public_key: string
      endpoint: string
      allowed_ips?: string
      persistent_keepalive?: number
    }
  }): Promise<{ configured: boolean; provider: string; public_key?: string; address?: string }> {
    return this.call({
      method: 'vpn.configure',
      params,
      timeout: 60000,
    })
  }

  async vpnDisconnect(): Promise<{ disconnected: boolean }> {
    return this.call({
      method: 'vpn.disconnect',
      params: {},
    })
  }

  // Marketplace
  async marketplaceDiscover(): Promise<{
    apps: Array<{
      manifest: {
        app_id: string
        name: string
        version: string
        description: { short: string; long: string } | string
        author: { name: string; did: string; nostr_pubkey: string }
        container: { image: string; ports: Array<{ container: number; host: number }>; }
        category: string
        icon_url: string
        repo_url: string
        license: string
      }
      trust_score: number
      trust_tier: string
      relay_count: number
      first_seen: string
      nostr_pubkey: string
    }>
    relay_count: number
  }> {
    return this.call({
      method: 'marketplace.discover',
      params: {},
      timeout: 30000,
    })
  }

  // DNS
  async dnsStatus(): Promise<{
    provider: string
    servers: string[]
    doh_enabled: boolean
    doh_url: string | null
    resolv_conf_servers: string[]
  }> {
    return this.call({
      method: 'network.dns-status',
      params: {},
    })
  }

  async configureDns(params: {
    provider: 'system' | 'cloudflare' | 'google' | 'quad9' | 'mullvad' | 'custom'
    servers?: string[]
  }): Promise<{
    ok: boolean
    provider: string
    servers: string[]
    doh_enabled: boolean
    doh_url: string | null
  }> {
    return this.call({
      method: 'network.configure-dns',
      params,
    })
  }

  // Disk management
  async diskStatus(): Promise<{
    used_bytes: number
    total_bytes: number
    free_bytes: number
    used_percent: number
    level: 'ok' | 'warning' | 'critical'
  }> {
    return this.call({ method: 'system.disk-status' })
  }

  async diskCleanup(): Promise<{
    freed_bytes: number
    freed_human: string
    actions: string[]
  }> {
    return this.call({
      method: 'system.disk-cleanup',
      timeout: 60000,
    })
  }

}

export const rpcClient = new RPCClient()