// TYPES
// UTILS
const isServer = typeof window === 'undefined' || 'Deno' in window;
function noop() {
  return undefined;
}
function functionalUpdate(updater, input) {
  return typeof updater === 'function' ? updater(input) : updater;
}
function isValidTimeout(value) {
  return typeof value === 'number' && value >= 0 && value !== Infinity;
}
function difference(array1, array2) {
  return array1.filter(x => !array2.includes(x));
}
function replaceAt(array, index, value) {
  const copy = array.slice(0);
  copy[index] = value;
  return copy;
}
function timeUntilStale(updatedAt, staleTime) {
  return Math.max(updatedAt + (staleTime || 0) - Date.now(), 0);
}
function parseQueryArgs(arg1, arg2, arg3) {
  if (!isQueryKey(arg1)) {
    return arg1;
  }

  if (typeof arg2 === 'function') {
    return { ...arg3,
      queryKey: arg1,
      queryFn: arg2
    };
  }

  return { ...arg2,
    queryKey: arg1
  };
}
function parseMutationArgs(arg1, arg2, arg3) {
  if (isQueryKey(arg1)) {
    if (typeof arg2 === 'function') {
      return { ...arg3,
        mutationKey: arg1,
        mutationFn: arg2
      };
    }

    return { ...arg2,
      mutationKey: arg1
    };
  }

  if (typeof arg1 === 'function') {
    return { ...arg2,
      mutationFn: arg1
    };
  }

  return { ...arg1
  };
}
function parseFilterArgs(arg1, arg2, arg3) {
  return isQueryKey(arg1) ? [{ ...arg2,
    queryKey: arg1
  }, arg3] : [arg1 || {}, arg2];
}
function parseMutationFilterArgs(arg1, arg2, arg3) {
  return isQueryKey(arg1) ? [{ ...arg2,
    mutationKey: arg1
  }, arg3] : [arg1 || {}, arg2];
}
function matchQuery(filters, query) {
  const {
    type = 'all',
    exact,
    fetchStatus,
    predicate,
    queryKey,
    stale
  } = filters;

  if (isQueryKey(queryKey)) {
    if (exact) {
      if (query.queryHash !== hashQueryKeyByOptions(queryKey, query.options)) {
        return false;
      }
    } else if (!partialMatchKey(query.queryKey, queryKey)) {
      return false;
    }
  }

  if (type !== 'all') {
    const isActive = query.isActive();

    if (type === 'active' && !isActive) {
      return false;
    }

    if (type === 'inactive' && isActive) {
      return false;
    }
  }

  if (typeof stale === 'boolean' && query.isStale() !== stale) {
    return false;
  }

  if (typeof fetchStatus !== 'undefined' && fetchStatus !== query.state.fetchStatus) {
    return false;
  }

  if (predicate && !predicate(query)) {
    return false;
  }

  return true;
}
function matchMutation(filters, mutation) {
  const {
    exact,
    fetching,
    predicate,
    mutationKey
  } = filters;

  if (isQueryKey(mutationKey)) {
    if (!mutation.options.mutationKey) {
      return false;
    }

    if (exact) {
      if (hashQueryKey(mutation.options.mutationKey) !== hashQueryKey(mutationKey)) {
        return false;
      }
    } else if (!partialMatchKey(mutation.options.mutationKey, mutationKey)) {
      return false;
    }
  }

  if (typeof fetching === 'boolean' && mutation.state.status === 'loading' !== fetching) {
    return false;
  }

  if (predicate && !predicate(mutation)) {
    return false;
  }

  return true;
}
function hashQueryKeyByOptions(queryKey, options) {
  const hashFn = (options == null ? void 0 : options.queryKeyHashFn) || hashQueryKey;
  return hashFn(queryKey);
}
/**
 * Default query keys hash function.
 * Hashes the value into a stable hash.
 */

function hashQueryKey(queryKey) {
  return JSON.stringify(queryKey, (_, val) => isPlainObject(val) ? Object.keys(val).sort().reduce((result, key) => {
    result[key] = val[key];
    return result;
  }, {}) : val);
}
/**
 * Checks if key `b` partially matches with key `a`.
 */

function partialMatchKey(a, b) {
  return partialDeepEqual(a, b);
}
/**
 * Checks if `b` partially matches with `a`.
 */

function partialDeepEqual(a, b) {
  if (a === b) {
    return true;
  }

  if (typeof a !== typeof b) {
    return false;
  }

  if (a && b && typeof a === 'object' && typeof b === 'object') {
    return !Object.keys(b).some(key => !partialDeepEqual(a[key], b[key]));
  }

  return false;
}
/**
 * This function returns `a` if `b` is deeply equal.
 * If not, it will replace any deeply equal children of `b` with those of `a`.
 * This can be used for structural sharing between JSON values for example.
 */

function replaceEqualDeep(a, b) {
  if (a === b) {
    return a;
  }

  const array = isPlainArray(a) && isPlainArray(b);

  if (array || isPlainObject(a) && isPlainObject(b)) {
    const aSize = array ? a.length : Object.keys(a).length;
    const bItems = array ? b : Object.keys(b);
    const bSize = bItems.length;
    const copy = array ? [] : {};
    let equalItems = 0;

    for (let i = 0; i < bSize; i++) {
      const key = array ? i : bItems[i];
      copy[key] = replaceEqualDeep(a[key], b[key]);

      if (copy[key] === a[key]) {
        equalItems++;
      }
    }

    return aSize === bSize && equalItems === aSize ? a : copy;
  }

  return b;
}
/**
 * Shallow compare objects. Only works with objects that always have the same properties.
 */

function shallowEqualObjects(a, b) {
  if (a && !b || b && !a) {
    return false;
  }

  for (const key in a) {
    if (a[key] !== b[key]) {
      return false;
    }
  }

  return true;
}
function isPlainArray(value) {
  return Array.isArray(value) && value.length === Object.keys(value).length;
} // Copied from: https://github.com/jonschlinkert/is-plain-object

function isPlainObject(o) {
  if (!hasObjectPrototype(o)) {
    return false;
  } // If has modified constructor


  const ctor = o.constructor;

  if (typeof ctor === 'undefined') {
    return true;
  } // If has modified prototype


  const prot = ctor.prototype;

  if (!hasObjectPrototype(prot)) {
    return false;
  } // If constructor does not have an Object-specific method


  if (!prot.hasOwnProperty('isPrototypeOf')) {
    return false;
  } // Most likely a plain Object


  return true;
}

function hasObjectPrototype(o) {
  return Object.prototype.toString.call(o) === '[object Object]';
}

function isQueryKey(value) {
  return Array.isArray(value);
}
function isError(value) {
  return value instanceof Error;
}
function sleep(timeout) {
  return new Promise(resolve => {
    setTimeout(resolve, timeout);
  });
}
/**
 * Schedules a microtask.
 * This can be useful to schedule state updates after rendering.
 */

function scheduleMicrotask(callback) {
  sleep(0).then(callback);
}
function getAbortController() {
  if (typeof AbortController === 'function') {
    return new AbortController();
  }

  return;
}
function replaceData(prevData, data, options) {
  // Use prev data if an isDataEqual function is defined and returns `true`
  if (options.isDataEqual != null && options.isDataEqual(prevData, data)) {
    return prevData;
  } else if (typeof options.structuralSharing === 'function') {
    return options.structuralSharing(prevData, data);
  } else if (options.structuralSharing !== false) {
    // Structurally share data between prev and new data if needed
    return replaceEqualDeep(prevData, data);
  }

  return data;
}

export { difference, functionalUpdate, getAbortController, hashQueryKey, hashQueryKeyByOptions, isError, isPlainArray, isPlainObject, isQueryKey, isServer, isValidTimeout, matchMutation, matchQuery, noop, parseFilterArgs, parseMutationArgs, parseMutationFilterArgs, parseQueryArgs, partialDeepEqual, partialMatchKey, replaceAt, replaceData, replaceEqualDeep, scheduleMicrotask, shallowEqualObjects, sleep, timeUntilStale };
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