export const DEPLOYMENT_STATUSES = ["deploying", "ready", "failed"] as const;

export type DeploymentStatus = (typeof DEPLOYMENT_STATUSES)[number];

export interface DeploymentStatusEvent {
  deploymentId: string;
  status: DeploymentStatus;
  updatedAt: string;
}

const DEPLOYMENT_ID_PATTERN = /^[a-f0-9]{40}$/u;

export function isDeploymentId(value: unknown): value is string {
  return typeof value === "string" && DEPLOYMENT_ID_PATTERN.test(value);
}

export function isDeploymentStatus(value: unknown): value is DeploymentStatus {
  return DEPLOYMENT_STATUSES.some((status) => status === value);
}

export function parseDeploymentStatusEvent(
  value: string,
): DeploymentStatusEvent | null {
  try {
    const parsed = JSON.parse(value) as Record<string, unknown>;
    if (
      !isDeploymentId(parsed.deploymentId) ||
      !isDeploymentStatus(parsed.status) ||
      typeof parsed.updatedAt !== "string" ||
      !Number.isFinite(Date.parse(parsed.updatedAt))
    ) {
      return null;
    }
    return {
      deploymentId: parsed.deploymentId,
      status: parsed.status,
      updatedAt: parsed.updatedAt,
    };
  } catch {
    return null;
  }
}