export type StorageConfig = {
  accessKeyId?: string
  bucket: string
  endpoint?: string
  forcePathStyle: boolean
  region: string
  secretAccessKey?: string
}

export function loadStorageConfigFromEnv(env: NodeJS.ProcessEnv = process.env): StorageConfig {
  return {
    accessKeyId: normalizeOptionalString(env.S3_ACCESS_KEY_ID),
    bucket: env.S3_BUCKET ?? "image-platform",
    endpoint: normalizeOptionalString(env.S3_ENDPOINT),
    forcePathStyle: parseBoolean(env.S3_FORCE_PATH_STYLE, true),
    region: env.S3_REGION ?? "us-east-1",
    secretAccessKey: normalizeOptionalString(env.S3_SECRET_ACCESS_KEY),
  }
}

function normalizeOptionalString(value: string | undefined) {
  return value && value.trim().length > 0 ? value : undefined
}

function parseBoolean(value: string | undefined, fallback: boolean) {
  if (value === undefined) {
    return fallback
  }

  return ["1", "true", "yes"].includes(value.toLowerCase())
}