// Module-level constants and env-driven configuration shared across the
// provider's modules. Anything env-dependent that we read once at module load
// time lives here; helpers that need to be evaluated per request go in env.ts
// (not yet split).

import os from "node:os";
import { join } from "node:path";

export const CLIENT_ID = "17e5f671-d194-4dfb-9706-5516cb48c098";
export const DEFAULT_OAUTH_HOST = "https://auth.kimi.com";

// KIMI_CODE_PROTOCOL supports two values: "openai" (default) and "anthropic".
export const IS_OPENAI_PROTOCOL = process.env.KIMI_CODE_PROTOCOL !== "anthropic";

export const PROTOCOL = IS_OPENAI_PROTOCOL ? "openai-completions" : "anthropic-messages";

// Use a custom api identifier so this provider never conflicts with the
// built-in "anthropic-messages" or "openai-completions" stream handlers.
export const KIMI_API_TYPE = IS_OPENAI_PROTOCOL
  ? "kimi-openai-completions"
  : "kimi-anthropic-messages";

export const DEFAULT_BASE_URL = IS_OPENAI_PROTOCOL
  ? "https://api.kimi.com/coding/v1"
  : "https://api.kimi.com/coding";

export const KIMI_CODE_VERSION = "0.6.0";
export const KIMI_CODE_USER_AGENT = `kimi-code-cli/${KIMI_CODE_VERSION}`;
export const KIMI_PLATFORM = "kimi_code_cli";

export function getKimiCodeHome(): string {
  const value = process.env.KIMI_CODE_HOME?.trim();
  return value || join(os.homedir(), ".kimi-code");
}

export const DEVICE_ID_PATH = join(getKimiCodeHome(), "device_id");

export const DEFAULT_KIMI_MODEL_INPUT = ["text", "image"] as const;

export const RETRYABLE_REFRESH_STATUSES = new Set([429, 500, 502, 503, 504]);

export const PROVIDER_ID = "kimi-coding";

export function getOAuthHost(): string {
  const value =
    process.env.KIMI_CODE_OAUTH_HOST || process.env.KIMI_OAUTH_HOST || DEFAULT_OAUTH_HOST;
  return value.trim() || DEFAULT_OAUTH_HOST;
}

export function getBaseUrl(): string {
  const value = process.env.KIMI_CODE_BASE_URL || process.env.KIMI_BASE_URL || DEFAULT_BASE_URL;
  return value.trim() || DEFAULT_BASE_URL;
}