import { homedir } from "os"
import { join } from "path"
import { die } from "./fmt.ts"

/** Read the ANTHROPIC_API_KEY from ~/.env. Returns undefined if not found. */
export async function getApiKey(): Promise<string | undefined> {
  const envFile = Bun.file(join(homedir(), ".env"))
  if (!(await envFile.exists())) return undefined

  const envContent = await envFile.text()
  return envContent.match(/^(?:export\s+)?ANTHROPIC_API_KEY=["']?([^"'\s]+)["']?/m)?.[1]
}

/** Read the ANTHROPIC_API_KEY from ~/.env, dying if not found. */
export async function requireApiKey(): Promise<string> {
  const key = await getApiKey()
  if (!key) die("ANTHROPIC_API_KEY not found in ~/.env")
  return key
}