import { __exports as scheduler_development } from '../../../../../../_virtual/scheduler.development.js';

/**
 * @license React
 * scheduler.development.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

var hasRequiredScheduler_development;

function requireScheduler_development () {
	if (hasRequiredScheduler_development) return scheduler_development;
	hasRequiredScheduler_development = 1;
	(function (exports$1) {

		if (process.env.NODE_ENV !== "production") {
		  (function() {

		/* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
		if (
		  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined' &&
		  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart ===
		    'function'
		) {
		  __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart(new Error());
		}
		var enableProfiling = false;
		var frameYieldMs = 5;

		function push(heap, node) {
		  var index = heap.length;
		  heap.push(node);
		  siftUp(heap, node, index);
		}
		function peek(heap) {
		  return heap.length === 0 ? null : heap[0];
		}
		function pop(heap) {
		  if (heap.length === 0) {
		    return null;
		  }

		  var first = heap[0];
		  var last = heap.pop();

		  if (last !== first) {
		    heap[0] = last;
		    siftDown(heap, last, 0);
		  }

		  return first;
		}

		function siftUp(heap, node, i) {
		  var index = i;

		  while (index > 0) {
		    var parentIndex = index - 1 >>> 1;
		    var parent = heap[parentIndex];

		    if (compare(parent, node) > 0) {
		      // The parent is larger. Swap positions.
		      heap[parentIndex] = node;
		      heap[index] = parent;
		      index = parentIndex;
		    } else {
		      // The parent is smaller. Exit.
		      return;
		    }
		  }
		}

		function siftDown(heap, node, i) {
		  var index = i;
		  var length = heap.length;
		  var halfLength = length >>> 1;

		  while (index < halfLength) {
		    var leftIndex = (index + 1) * 2 - 1;
		    var left = heap[leftIndex];
		    var rightIndex = leftIndex + 1;
		    var right = heap[rightIndex]; // If the left or right node is smaller, swap with the smaller of those.

		    if (compare(left, node) < 0) {
		      if (rightIndex < length && compare(right, left) < 0) {
		        heap[index] = right;
		        heap[rightIndex] = node;
		        index = rightIndex;
		      } else {
		        heap[index] = left;
		        heap[leftIndex] = node;
		        index = leftIndex;
		      }
		    } else if (rightIndex < length && compare(right, node) < 0) {
		      heap[index] = right;
		      heap[rightIndex] = node;
		      index = rightIndex;
		    } else {
		      // Neither child is smaller. Exit.
		      return;
		    }
		  }
		}

		function compare(a, b) {
		  // Compare sort index first, then task id.
		  var diff = a.sortIndex - b.sortIndex;
		  return diff !== 0 ? diff : a.id - b.id;
		}

		// TODO: Use symbols?
		var ImmediatePriority = 1;
		var UserBlockingPriority = 2;
		var NormalPriority = 3;
		var LowPriority = 4;
		var IdlePriority = 5;

		function markTaskErrored(task, ms) {
		}

		/* eslint-disable no-var */

		var hasPerformanceNow = typeof performance === 'object' && typeof performance.now === 'function';

		if (hasPerformanceNow) {
		  var localPerformance = performance;

		  exports$1.unstable_now = function () {
		    return localPerformance.now();
		  };
		} else {
		  var localDate = Date;
		  var initialTime = localDate.now();

		  exports$1.unstable_now = function () {
		    return localDate.now() - initialTime;
		  };
		} // Max 31 bit integer. The max integer size in V8 for 32-bit systems.
		// Math.pow(2, 30) - 1
		// 0b111111111111111111111111111111


		var maxSigned31BitInt = 1073741823; // Times out immediately

		var IMMEDIATE_PRIORITY_TIMEOUT = -1; // Eventually times out

		var USER_BLOCKING_PRIORITY_TIMEOUT = 250;
		var NORMAL_PRIORITY_TIMEOUT = 5000;
		var LOW_PRIORITY_TIMEOUT = 10000; // Never times out

		var IDLE_PRIORITY_TIMEOUT = maxSigned31BitInt; // Tasks are stored on a min heap

		var taskQueue = [];
		var timerQueue = []; // Incrementing id counter. Used to maintain insertion order.

		var taskIdCounter = 1; // Pausing the scheduler is useful for debugging.
		var currentTask = null;
		var currentPriorityLevel = NormalPriority; // This is set while performing work, to prevent re-entrance.

		var isPerformingWork = false;
		var isHostCallbackScheduled = false;
		var isHostTimeoutScheduled = false; // Capture local references to native APIs, in case a polyfill overrides them.

		var localSetTimeout = typeof setTimeout === 'function' ? setTimeout : null;
		var localClearTimeout = typeof clearTimeout === 'function' ? clearTimeout : null;
		var localSetImmediate = typeof setImmediate !== 'undefined' ? setImmediate : null; // IE and Node.js + jsdom

		typeof navigator !== 'undefined' && navigator.scheduling !== undefined && navigator.scheduling.isInputPending !== undefined ? navigator.scheduling.isInputPending.bind(navigator.scheduling) : null;

		function advanceTimers(currentTime) {
		  // Check for tasks that are no longer delayed and add them to the queue.
		  var timer = peek(timerQueue);

		  while (timer !== null) {
		    if (timer.callback === null) {
		      // Timer was cancelled.
		      pop(timerQueue);
		    } else if (timer.startTime <= currentTime) {
		      // Timer fired. Transfer to the task queue.
		      pop(timerQueue);
		      timer.sortIndex = timer.expirationTime;
		      push(taskQueue, timer);
		    } else {
		      // Remaining timers are pending.
		      return;
		    }

		    timer = peek(timerQueue);
		  }
		}

		function handleTimeout(currentTime) {
		  isHostTimeoutScheduled = false;
		  advanceTimers(currentTime);

		  if (!isHostCallbackScheduled) {
		    if (peek(taskQueue) !== null) {
		      isHostCallbackScheduled = true;
		      requestHostCallback(flushWork);
		    } else {
		      var firstTimer = peek(timerQueue);

		      if (firstTimer !== null) {
		        requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime);
		      }
		    }
		  }
		}

		function flushWork(hasTimeRemaining, initialTime) {


		  isHostCallbackScheduled = false;

		  if (isHostTimeoutScheduled) {
		    // We scheduled a timeout but it's no longer needed. Cancel it.
		    isHostTimeoutScheduled = false;
		    cancelHostTimeout();
		  }

		  isPerformingWork = true;
		  var previousPriorityLevel = currentPriorityLevel;

		  try {
		    var currentTime; if (enableProfiling) ; else {
		      // No catch in prod code path.
		      return workLoop(hasTimeRemaining, initialTime);
		    }
		  } finally {
		    currentTask = null;
		    currentPriorityLevel = previousPriorityLevel;
		    isPerformingWork = false;
		  }
		}

		function workLoop(hasTimeRemaining, initialTime) {
		  var currentTime = initialTime;
		  advanceTimers(currentTime);
		  currentTask = peek(taskQueue);

		  while (currentTask !== null && true) {
		    if (currentTask.expirationTime > currentTime && (!hasTimeRemaining || shouldYieldToHost())) {
		      // This currentTask hasn't expired, and we've reached the deadline.
		      break;
		    }

		    var callback = currentTask.callback;

		    if (typeof callback === 'function') {
		      currentTask.callback = null;
		      currentPriorityLevel = currentTask.priorityLevel;
		      var didUserCallbackTimeout = currentTask.expirationTime <= currentTime;

		      var continuationCallback = callback(didUserCallbackTimeout);
		      currentTime = exports$1.unstable_now();

		      if (typeof continuationCallback === 'function') {
		        currentTask.callback = continuationCallback;
		      } else {

		        if (currentTask === peek(taskQueue)) {
		          pop(taskQueue);
		        }
		      }

		      advanceTimers(currentTime);
		    } else {
		      pop(taskQueue);
		    }

		    currentTask = peek(taskQueue);
		  } // Return whether there's additional work


		  if (currentTask !== null) {
		    return true;
		  } else {
		    var firstTimer = peek(timerQueue);

		    if (firstTimer !== null) {
		      requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime);
		    }

		    return false;
		  }
		}

		function unstable_runWithPriority(priorityLevel, eventHandler) {
		  switch (priorityLevel) {
		    case ImmediatePriority:
		    case UserBlockingPriority:
		    case NormalPriority:
		    case LowPriority:
		    case IdlePriority:
		      break;

		    default:
		      priorityLevel = NormalPriority;
		  }

		  var previousPriorityLevel = currentPriorityLevel;
		  currentPriorityLevel = priorityLevel;

		  try {
		    return eventHandler();
		  } finally {
		    currentPriorityLevel = previousPriorityLevel;
		  }
		}

		function unstable_next(eventHandler) {
		  var priorityLevel;

		  switch (currentPriorityLevel) {
		    case ImmediatePriority:
		    case UserBlockingPriority:
		    case NormalPriority:
		      // Shift down to normal priority
		      priorityLevel = NormalPriority;
		      break;

		    default:
		      // Anything lower than normal priority should remain at the current level.
		      priorityLevel = currentPriorityLevel;
		      break;
		  }

		  var previousPriorityLevel = currentPriorityLevel;
		  currentPriorityLevel = priorityLevel;

		  try {
		    return eventHandler();
		  } finally {
		    currentPriorityLevel = previousPriorityLevel;
		  }
		}

		function unstable_wrapCallback(callback) {
		  var parentPriorityLevel = currentPriorityLevel;
		  return function () {
		    // This is a fork of runWithPriority, inlined for performance.
		    var previousPriorityLevel = currentPriorityLevel;
		    currentPriorityLevel = parentPriorityLevel;

		    try {
		      return callback.apply(this, arguments);
		    } finally {
		      currentPriorityLevel = previousPriorityLevel;
		    }
		  };
		}

		function unstable_scheduleCallback(priorityLevel, callback, options) {
		  var currentTime = exports$1.unstable_now();
		  var startTime;

		  if (typeof options === 'object' && options !== null) {
		    var delay = options.delay;

		    if (typeof delay === 'number' && delay > 0) {
		      startTime = currentTime + delay;
		    } else {
		      startTime = currentTime;
		    }
		  } else {
		    startTime = currentTime;
		  }

		  var timeout;

		  switch (priorityLevel) {
		    case ImmediatePriority:
		      timeout = IMMEDIATE_PRIORITY_TIMEOUT;
		      break;

		    case UserBlockingPriority:
		      timeout = USER_BLOCKING_PRIORITY_TIMEOUT;
		      break;

		    case IdlePriority:
		      timeout = IDLE_PRIORITY_TIMEOUT;
		      break;

		    case LowPriority:
		      timeout = LOW_PRIORITY_TIMEOUT;
		      break;

		    case NormalPriority:
		    default:
		      timeout = NORMAL_PRIORITY_TIMEOUT;
		      break;
		  }

		  var expirationTime = startTime + timeout;
		  var newTask = {
		    id: taskIdCounter++,
		    callback: callback,
		    priorityLevel: priorityLevel,
		    startTime: startTime,
		    expirationTime: expirationTime,
		    sortIndex: -1
		  };

		  if (startTime > currentTime) {
		    // This is a delayed task.
		    newTask.sortIndex = startTime;
		    push(timerQueue, newTask);

		    if (peek(taskQueue) === null && newTask === peek(timerQueue)) {
		      // All tasks are delayed, and this is the task with the earliest delay.
		      if (isHostTimeoutScheduled) {
		        // Cancel an existing timeout.
		        cancelHostTimeout();
		      } else {
		        isHostTimeoutScheduled = true;
		      } // Schedule a timeout.


		      requestHostTimeout(handleTimeout, startTime - currentTime);
		    }
		  } else {
		    newTask.sortIndex = expirationTime;
		    push(taskQueue, newTask);
		    // wait until the next time we yield.


		    if (!isHostCallbackScheduled && !isPerformingWork) {
		      isHostCallbackScheduled = true;
		      requestHostCallback(flushWork);
		    }
		  }

		  return newTask;
		}

		function unstable_pauseExecution() {
		}

		function unstable_continueExecution() {

		  if (!isHostCallbackScheduled && !isPerformingWork) {
		    isHostCallbackScheduled = true;
		    requestHostCallback(flushWork);
		  }
		}

		function unstable_getFirstCallbackNode() {
		  return peek(taskQueue);
		}

		function unstable_cancelCallback(task) {
		  // remove from the queue because you can't remove arbitrary nodes from an
		  // array based heap, only the first one.)


		  task.callback = null;
		}

		function unstable_getCurrentPriorityLevel() {
		  return currentPriorityLevel;
		}

		var isMessageLoopRunning = false;
		var scheduledHostCallback = null;
		var taskTimeoutID = -1; // Scheduler periodically yields in case there is other work on the main
		// thread, like user events. By default, it yields multiple times per frame.
		// It does not attempt to align with frame boundaries, since most tasks don't
		// need to be frame aligned; for those that do, use requestAnimationFrame.

		var frameInterval = frameYieldMs;
		var startTime = -1;

		function shouldYieldToHost() {
		  var timeElapsed = exports$1.unstable_now() - startTime;

		  if (timeElapsed < frameInterval) {
		    // The main thread has only been blocked for a really short amount of time;
		    // smaller than a single frame. Don't yield yet.
		    return false;
		  } // The main thread has been blocked for a non-negligible amount of time. We


		  return true;
		}

		function requestPaint() {

		}

		function forceFrameRate(fps) {
		  if (fps < 0 || fps > 125) {
		    // Using console['error'] to evade Babel and ESLint
		    console['error']('forceFrameRate takes a positive int between 0 and 125, ' + 'forcing frame rates higher than 125 fps is not supported');
		    return;
		  }

		  if (fps > 0) {
		    frameInterval = Math.floor(1000 / fps);
		  } else {
		    // reset the framerate
		    frameInterval = frameYieldMs;
		  }
		}

		var performWorkUntilDeadline = function () {
		  if (scheduledHostCallback !== null) {
		    var currentTime = exports$1.unstable_now(); // Keep track of the start time so we can measure how long the main thread
		    // has been blocked.

		    startTime = currentTime;
		    var hasTimeRemaining = true; // If a scheduler task throws, exit the current browser task so the
		    // error can be observed.
		    //
		    // Intentionally not using a try-catch, since that makes some debugging
		    // techniques harder. Instead, if `scheduledHostCallback` errors, then
		    // `hasMoreWork` will remain true, and we'll continue the work loop.

		    var hasMoreWork = true;

		    try {
		      hasMoreWork = scheduledHostCallback(hasTimeRemaining, currentTime);
		    } finally {
		      if (hasMoreWork) {
		        // If there's more work, schedule the next message event at the end
		        // of the preceding one.
		        schedulePerformWorkUntilDeadline();
		      } else {
		        isMessageLoopRunning = false;
		        scheduledHostCallback = null;
		      }
		    }
		  } else {
		    isMessageLoopRunning = false;
		  } // Yielding to the browser will give it a chance to paint, so we can
		};

		var schedulePerformWorkUntilDeadline;

		if (typeof localSetImmediate === 'function') {
		  // Node.js and old IE.
		  // There's a few reasons for why we prefer setImmediate.
		  //
		  // Unlike MessageChannel, it doesn't prevent a Node.js process from exiting.
		  // (Even though this is a DOM fork of the Scheduler, you could get here
		  // with a mix of Node.js 15+, which has a MessageChannel, and jsdom.)
		  // https://github.com/facebook/react/issues/20756
		  //
		  // But also, it runs earlier which is the semantic we want.
		  // If other browsers ever implement it, it's better to use it.
		  // Although both of these would be inferior to native scheduling.
		  schedulePerformWorkUntilDeadline = function () {
		    localSetImmediate(performWorkUntilDeadline);
		  };
		} else if (typeof MessageChannel !== 'undefined') {
		  // DOM and Worker environments.
		  // We prefer MessageChannel because of the 4ms setTimeout clamping.
		  var channel = new MessageChannel();
		  var port = channel.port2;
		  channel.port1.onmessage = performWorkUntilDeadline;

		  schedulePerformWorkUntilDeadline = function () {
		    port.postMessage(null);
		  };
		} else {
		  // We should only fallback here in non-browser environments.
		  schedulePerformWorkUntilDeadline = function () {
		    localSetTimeout(performWorkUntilDeadline, 0);
		  };
		}

		function requestHostCallback(callback) {
		  scheduledHostCallback = callback;

		  if (!isMessageLoopRunning) {
		    isMessageLoopRunning = true;
		    schedulePerformWorkUntilDeadline();
		  }
		}

		function requestHostTimeout(callback, ms) {
		  taskTimeoutID = localSetTimeout(function () {
		    callback(exports$1.unstable_now());
		  }, ms);
		}

		function cancelHostTimeout() {
		  localClearTimeout(taskTimeoutID);
		  taskTimeoutID = -1;
		}

		var unstable_requestPaint = requestPaint;
		var unstable_Profiling =  null;

		exports$1.unstable_IdlePriority = IdlePriority;
		exports$1.unstable_ImmediatePriority = ImmediatePriority;
		exports$1.unstable_LowPriority = LowPriority;
		exports$1.unstable_NormalPriority = NormalPriority;
		exports$1.unstable_Profiling = unstable_Profiling;
		exports$1.unstable_UserBlockingPriority = UserBlockingPriority;
		exports$1.unstable_cancelCallback = unstable_cancelCallback;
		exports$1.unstable_continueExecution = unstable_continueExecution;
		exports$1.unstable_forceFrameRate = forceFrameRate;
		exports$1.unstable_getCurrentPriorityLevel = unstable_getCurrentPriorityLevel;
		exports$1.unstable_getFirstCallbackNode = unstable_getFirstCallbackNode;
		exports$1.unstable_next = unstable_next;
		exports$1.unstable_pauseExecution = unstable_pauseExecution;
		exports$1.unstable_requestPaint = unstable_requestPaint;
		exports$1.unstable_runWithPriority = unstable_runWithPriority;
		exports$1.unstable_scheduleCallback = unstable_scheduleCallback;
		exports$1.unstable_shouldYield = shouldYieldToHost;
		exports$1.unstable_wrapCallback = unstable_wrapCallback;
		          /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
		if (
		  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined' &&
		  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop ===
		    'function'
		) {
		  __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop(new Error());
		}
		        
		  })();
		} 
	} (scheduler_development));
	return scheduler_development;
}

export { requireScheduler_development as __require };
//# sourceMappingURL=scheduler.development.js.map
