import { z } from "zod";
import { type ModuleId, moduleIdSchema } from "./identifiers.js";

export const POSTGRES_IDENTIFIER_MAX_LENGTH = 63;

export const moduleTableLocalNameSchema = z
  .string()
  .min(1)
  .regex(/^[a-z][a-z0-9]*(?:_[a-z0-9]+)*$/u, "Must be a lowercase snake-case table name.");

export const physicalModuleTableNameSchema = moduleTableLocalNameSchema.max(
  POSTGRES_IDENTIFIER_MAX_LENGTH,
  `Must not exceed ${POSTGRES_IDENTIFIER_MAX_LENGTH} characters.`,
);

export function moduleTableNamespace(moduleId: ModuleId): string {
  return moduleIdSchema.parse(moduleId).replaceAll("-", "_");
}

export function moduleTablePrefix(moduleId: ModuleId): string {
  return `${moduleTableNamespace(moduleId)}_`;
}

export function moduleTableName(moduleId: ModuleId, localName: string): string {
  const parsedLocalName = moduleTableLocalNameSchema.parse(localName);
  const tableName = `${moduleTablePrefix(moduleId)}${parsedLocalName}`;
  if (!physicalModuleTableNameSchema.safeParse(tableName).success) {
    throw new RangeError("The namespaced PostgreSQL table name is invalid or too long.");
  }
  return tableName;
}