import { ZodError } from "zod";
import type { ReportActionState } from "@/lib/reports/action-state";
import type { CompletionBlocker } from "@/lib/work-orders/status";
import { ServiceError } from "@/server/services/context";
import { ForbiddenError } from "@/server/rbac";
import { ModuleDisabledError } from "@/server/modules";

/** Map thrown errors of report actions to a displayable state (no internals leak to the client). */
export function errorState(err: unknown): ReportActionState {
  const at = Date.now();
  if (err instanceof ServiceError) {
    const details = err.details as { field?: string } | CompletionBlocker[] | undefined;
    return {
      status: "error",
      code: err.code,
      field: details && !Array.isArray(details) ? details.field : undefined,
      blockers: Array.isArray(details) ? details : undefined,
      at,
    };
  }
  if (err instanceof ZodError) return { status: "error", code: "invalid", field: String(err.issues[0]?.path[0] ?? ""), at };
  if (err instanceof ForbiddenError || err instanceof ModuleDisabledError) return { status: "error", code: "forbidden", at };
  console.error("[actions/reports]", err);
  return { status: "error", code: "generic", at };
}

export const okState = (reportId?: string): ReportActionState => ({ status: "ok", reportId, at: Date.now() });

export const str = (fd: FormData, key: string): string | undefined => {
  const v = fd.get(key);
  return typeof v === "string" ? v : undefined;
};