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import { calendarHref } from "@/worker/caldav/paths";
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import type { CalDavDoDb } from "@/worker/db/cal-dav-do/client";
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import { calendarSyncToken, ensureCalendar, latestChangeSeq, objectByName } from "@/worker/db/cal-dav-do/repository";
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import { calDavError, type CalDavError } from "@/worker/objects/cal-dav/types";
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import {
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  collectionWritePrecondition,
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  type CollectionConditionalInput,
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} from "@/worker/objects/common/collection-preconditions";
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export type CalendarConditionalInput = CollectionConditionalInput;
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export function calendarWritePrecondition(
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  db: CalDavDoDb,
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  input: CalendarConditionalInput,
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  targetHref: string,
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  targetEtag: string | null,
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): CalDavError | null {
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  return collectionWritePrecondition(db, input, targetHref, targetEtag, {
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    basePath: "/calendars",
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    collectionHref: calendarHref,
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    ensureCollection: ensureCalendar,
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    objectEtag: (db, calendarId, objectName) => objectByName(db, calendarId, objectName)?.etag ?? null,
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    latestChangeSeq,
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    syncToken: calendarSyncToken,
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    preconditionFailed: (message) => calDavError(412, "precondition_failed", message),
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  });
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}