import * as path from "node:path"
import * as os from "node:os"

export const PACKAGE_NAME = "oh-my-opencode"
export const NPM_REGISTRY_URL = `https://registry.npmjs.org/-/package/${PACKAGE_NAME}/dist-tags`
export const NPM_FETCH_TIMEOUT = 5000

/**
 * OpenCode plugin cache directory
 * - Linux/macOS: ~/.cache/opencode/
 * - Windows: %LOCALAPPDATA%/opencode/
 */
function getCacheDir(): string {
  if (process.platform === "win32") {
    return path.join(process.env.LOCALAPPDATA ?? os.homedir(), "opencode")
  }
  return path.join(os.homedir(), ".cache", "opencode")
}

export const CACHE_DIR = getCacheDir()
export const VERSION_FILE = path.join(CACHE_DIR, "version")
export const INSTALLED_PACKAGE_JSON = path.join(
  CACHE_DIR,
  "node_modules",
  PACKAGE_NAME,
  "package.json"
)

/**
 * OpenCode config file locations (priority order)
 */
function getUserConfigDir(): string {
  if (process.platform === "win32") {
    return process.env.APPDATA ?? path.join(os.homedir(), "AppData", "Roaming")
  }
  return process.env.XDG_CONFIG_HOME ?? path.join(os.homedir(), ".config")
}

export const USER_CONFIG_DIR = getUserConfigDir()
export const USER_OPENCODE_CONFIG = path.join(USER_CONFIG_DIR, "opencode", "opencode.json")