import { type ActionInstanceMap, type ActionTypes, createAction } from '@equinor/fusion-observable';
import type { CacheSortFn, QueryCacheMutation, QueryCacheRecord } from './types';

/**
 * Creates a set of actions to manipulate cache entries.
 *
 * @template TType The type of the value being cached.
 * @template TArgs The type of the arguments associated with the cache entry.
 * @returns An object containing the cache actions.
 */
// eslint-disable-next-line @typescript-eslint/no-explicit-any
export default function createActions<TType = any, TArgs = any>() {
  return {
    /**
     * Action to set a cache entry.
     *
     * @param key The cache key.
     * @param record The cache record to set.
     * @returns An action object with the cache key and record.
     */
    set: createAction('cache/set', (key: string, record: QueryCacheRecord<TType, TArgs>) => ({
      payload: { key, record },
    })),
    /**
     * Action to set a cache entry.
     *
     * @param key The cache key.
     * @param entry The cache entry, including value, arguments, and transaction identifier.
     * @returns An action object with the cache key and entry.
     */
    insert: createAction(
      'cache/insert',
      (key: string, entry: { value: TType; args: TArgs; transaction: string }) => {
        return { payload: { key, entry } };
      },
    ),
    /**
     * Action to remove a cache entry.
     *
     * @param key The cache key to remove.
     * @returns An action object with the cache key.
     */
    remove: createAction('cache/remove', (key: string) => ({ payload: key })),
    /**
     * Action to invalidate a cache entry.
     *
     * @param key The cache key to invalidate.
     * @returns An action object with the cache key.
     */
    invalidate: createAction('cache/invalidate', (key?: string, item?: QueryCacheRecord) => ({
      payload: key,
      meta: { item },
    })),
    /**
     * Action to mutate a cache entry.
     *
     * @param changes An object containing the cache key, new value, and optional updated timestamp and transaction identifier.
     * @param current The current cache record, if available.
     * @returns An action object with the changes to be applied to the cache entry and the current cache record as metadata.
     */
    mutate: createAction(
      'cache/mutate',
      (key: string, changes: QueryCacheMutation<TType>, item?: QueryCacheRecord<TType, TArgs>) => ({
        payload: { ...changes, key },
        meta: { item },
      }),
    ),
    /**
     * Action to trim the cache based on certain criteria.
     *
     * @param payload Object containing optional sort function, validation function, and size limit.
     * @returns An action object with the payload.
     */
    trim: createAction(
      'cache/trim',
      (payload: {
        sort?: CacheSortFn<TType, TArgs>;
        validate?: (item: QueryCacheRecord<TType, TArgs>) => boolean;
        size?: number;
      }) => {
        return { payload };
      },
    ),
  };
}

/**
 * Type representing the builder function for cache actions.
 *
 * @template TType The type of the value being cached.
 * @template TArgs The type of the arguments associated with the cache entry.
 */
// eslint-disable-next-line @typescript-eslint/no-explicit-any
export type ActionBuilder<TType = any, TArgs = any> = ReturnType<
  typeof createActions<TType, TArgs>
>;

/**
 * The singleton actions object containing all cache manipulation actions.
 */
export const actions = createActions();

/**
 * Type representing the map of action instances for a given value and argument types.
 *
 * @template TType The type of the value being cached.
 * @template TArgs The type of the arguments associated with the cache entry.
 */
// eslint-disable-next-line @typescript-eslint/no-explicit-any
export type ActionMap<TType = any, TArgs = any> = ActionInstanceMap<ActionBuilder<TType, TArgs>>;

/**
 * Type representing the actions available for cache manipulation.
 *
 * @template TType The type of the value being cached.
 * @template TArgs The type of the arguments associated with the cache entry.
 */
// eslint-disable-next-line @typescript-eslint/no-explicit-any
export type Actions<TType = any, TArgs = any> = ActionTypes<ActionMap<TType, TArgs>>;