import OpenAI from "openai"

// True when the server has an AI provider key (OpenAI OR Anthropic). AI routes
// check this up front and return a friendly 503 instead of throwing, matching
// how the other optional integrations (Stripe / SMTP / Turnstile) degrade when
// unconfigured. The active provider is chosen by an admin (see lib/ai/provider).
export function aiConfigured(): boolean {
  return Boolean(process.env.OPENAI_API_KEY || process.env.ANTHROPIC_API_KEY)
}

export const AI_UNCONFIGURED_ERROR =
  "AI features aren't configured on this server (no OpenAI or Anthropic API key). Ask your administrator to enable them."

// Lazily construct the OpenAI client so `next build` does NOT require
// OPENAI_API_KEY — it's only needed at runtime. Call sites keep using
// `openai.xxx` unchanged; the Proxy builds the real client on first access.
let _openai: OpenAI | null = null

function getOpenAI(): OpenAI {
  if (!_openai) {
    const key = process.env.OPENAI_API_KEY
    if (!key) throw new Error("OPENAI_API_KEY is not set")
    _openai = new OpenAI({ apiKey: key })
  }
  return _openai
}

export const openai = new Proxy({} as OpenAI, {
  get(_target, prop, receiver) {
    const client = getOpenAI()
    const value = Reflect.get(client, prop, receiver)
    return typeof value === "function" ? value.bind(client) : value
  },
})
