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//xxxx/ <reference path="./typings/Temporal.d.ts" />
import type { Awaitable } from "./utils/common-types.ts";import type { Context } from "./index.ts";

export type CacheControl = 'no-cache' | 'no-store' | 'public' | 'private' | string;
export interface CacheOptions {  cacheControl?: CacheControl,  maxAge?: number,  mustRevalidate?: boolean,  immutable?: boolean,}
// const SECONDS = { unit: 'second', relativeTo: '1970-01-01' } as Temporal.DurationTotalOf;
/** * TODO: Implement request-response * @deprecated Not implemented */export const caching = (opt: CacheOptions = {}) => async <X extends Context>(ax: Awaitable<X>) => {  const x = await ax;  // const req = x.request;    x.effects.push(res => {    res.headers.set('cache-control', opt.cacheControl ?? '')
    if (typeof opt.maxAge === 'number') {      // FIXME: check for global DEBUG var? Check process.env ??      if (opt.maxAge > 31536000) console.warn(`Provided maxAge appears to be too large. Perhaps you meant ${opt.maxAge / 1000}? maxAge is defined in seconds!`)      res.headers.append('cache-control', `max-age=${opt.maxAge}`)    // } else if (opt.maxAge) {    //   res.headers.append('cache-control', `max-age=${opt.maxAge.total(SECONDS)}`)    }
    if (opt.mustRevalidate) {      res.headers.append('cache-control', 'must-revalidate')    }
    if (opt.immutable) {      res.headers.append('cache-control', 'immutable')    }
    return res;  })
  return x;}