// The setting keep-main-rules (the operator, 2026-10-23: "disable the gitea branch protection reset thing"): only when it
// is true does the module put main's rule right in every repository of the organisation (client.ts ensureMainMerges).
// False, the default, leaves every repository's branch protection as people set it at the forge.
import { readFileSync } from "node:fs";

export const LEFT_AS_SET = "[gitea] main's rules are left as set at the forge (keep-main-rules is false)";

/** The setting from the settings-merged config file the mesh delivers; absent, unreadable or not true is false. */
export function keepMainRules(env: NodeJS.ProcessEnv = process.env): boolean {
  const file = env.MESH_GITEA_CONFIG_FILE;
  if (!file) return false;
  try {
    const v = (JSON.parse(readFileSync(file, "utf8")) as Record<string, unknown>)["keep-main-rules"];
    return v === true || v === "true";
  } catch { return false; }
}

/** The 10-minute step: puts the rules right only when kept; else says once that they are left and writes nothing. */
export function mainRulesStep(keep: boolean, put: () => Promise<string[]>, say: (line: string) => void): () => Promise<void> {
  let said = false;
  let touched = -1;
  return async () => {
    if (!keep) {
      if (!said) say(LEFT_AS_SET);
      said = true;
      return;
    }
    const repos = await put();
    if (repos.length !== touched) say(`[gitea] main's rule is right in ${repos.length} repositories`);
    touched = repos.length;
  };
}