import { BlockVariableDto } from "./BlockVariableDto";

type Params = any;

export namespace BlockVariableService {
  export function getValue({ request, params, variable }: { request: Request; params: Params; variable?: BlockVariableDto }): string | null {
    if (!variable) {
      throw Error("[BlockVariableService.getValue()] Unknown variable");
    }
    let value: string | null = null;
    if (variable.type === "manual") {
      value = variable?.value ?? null;
    } else if (variable.type === "param" && variable.param) {
      value = params[variable.param] ?? null;
    } else if (variable.type === "query") {
      const searchParams = new URL(request.url).searchParams;
      value = searchParams.get(variable.query || "")?.toString() ?? null;
    }
    if (variable?.required && !value) {
      throw Error(`Variable is required`);
    }
    return value;
  }

  // export function getValues({ request, params, block }: { request: Request; params: Params; block: PageBlockDto }): Record<string, string | null> {
  //   if (!block.variables) {
  //     return {};
  //   }
  //   const values: { [key: string]: string | null } = {};
  //   Object.keys(block.variables).forEach((key) => {
  //     values[key] = getValue({ request, params, variable: block.variables[key] });
  //     if (values[key] === null && block.variables[key]?.required) {
  //       throw Error(`Variable "${key}" is required`);
  //     }
  //   });
  //   return values;
  // }
}