import path from "path";
import type { WorkflowMode } from "./simulation";
import { validateExecutionId } from "./executionId";

export const WORKFLOW_RESULT_NAMES = ["execution", "view", "verification"] as const;

export type WorkflowResultName = typeof WORKFLOW_RESULT_NAMES[number];

interface WorkflowResultPathInput {
  target: string;
  executionId: string;
  mode: WorkflowMode;
  name: WorkflowResultName;
}

interface WorkflowResultDirectoryInput {
  target: string;
  executionId: string;
  mode: WorkflowMode;
}

const SAFE_SEGMENT = /^[A-Za-z0-9](?:[A-Za-z0-9._-]*[A-Za-z0-9_-])?$/;

const confinedSegment = (value: string, label: string): string => {
  if (!SAFE_SEGMENT.test(value)) {
    throw new Error(`${label} is not safe for a workflow result path`);
  }
  return value;
};

const modeSegment = (mode: WorkflowMode): string => {
  return mode === "simulate" ? "simulation" : mode;
};

export const workflowResultRelativeDirectory = (
  input: WorkflowResultDirectoryInput,
): string => {
  return path.posix.join(
    "results",
    confinedSegment(input.target, "target"),
    validateExecutionId(input.executionId),
    modeSegment(input.mode),
  );
};

export const workflowResultRelativePath = (input: WorkflowResultPathInput): string => {
  const name = confinedSegment(input.name, "result name");
  return path.posix.join(workflowResultRelativeDirectory(input), `${name}.json`);
};