/**
 * Sovereign Node Key — SnapKitty execution gate.
 * Called before any model routing request fires.
 * 
 * Get your key: licensing@snapkittywest.dev
 * Copyright (C) 2026 Bel Esprit D'Accord Irrevocable Trust (EIN 42-697643)
 */

const KEY_PREFIX = 'SNK-'
const KEY_STORAGE = 'snapkitty_node_key'
const KEY_ENV = import.meta.env?.VITE_SNAPKITTY_NODE_KEY

export const SOVEREIGN_WALL = `
╔══════════════════════════════════════════════════╗
║     SOVEREIGN NODE KEY REQUIRED                  ║
║                                                  ║
║  BOB IDE requires a valid SnapKitty node key    ║
║  to activate model routing.                     ║
║                                                  ║
║  Get your key:                                   ║
║  licensing@snapkittywest.dev                     ║
║  https://github.com/SNAPKITTYWEST               ║
╚══════════════════════════════════════════════════╝
`

export function getNodeKey(): string {
  return KEY_ENV || localStorage.getItem(KEY_STORAGE) || ''
}

export function setNodeKey(key: string): void {
  localStorage.setItem(KEY_STORAGE, key)
}

export function hasNodeKey(): boolean {
  const key = getNodeKey()
  return key.startsWith(KEY_PREFIX) && key.length > 10
}

export function requireNodeKey(): void {
  if (!hasNodeKey()) {
    throw new Error(SOVEREIGN_WALL)
  }
}

/** Attach node key to fetch headers for model routing requests */
export function nodeKeyHeaders(): HeadersInit {
  const key = getNodeKey()
  if (!key) return {}
  return { 'X-Sovereign-Node-Key': key }
}