import { assert, isArray } from '../../../../../zrender@6.0.0/node_modules/zrender/lib/core/util.mjs';

;
/**
 * @param {Object} define
 * @return See the return of `createTask`.
 */
function createTask(define) {
  return new Task(define);
}
var Task = /** @class */function () {
  function Task(define) {
    define = define || {};
    this._reset = define.reset;
    this._plan = define.plan;
    this._count = define.count;
    this._onDirty = define.onDirty;
    this._dirty = true;
  }
  /**
   * @param step Specified step.
   * @param skip Skip customer perform call.
   * @param modBy Sampling window size.
   * @param modDataCount Sampling count.
   * @return whether unfinished.
   */
  Task.prototype.perform = function (performArgs) {
    var upTask = this._upstream;
    var skip = performArgs && performArgs.skip;
    // TODO some refactor.
    // Pull data. Must pull data each time, because context.data
    // may be updated by Series.setData.
    if (this._dirty && upTask) {
      var context = this.context;
      context.data = context.outputData = upTask.context.outputData;
    }
    if (this.__pipeline) {
      this.__pipeline.currentTask = this;
    }
    var planResult;
    if (this._plan && !skip) {
      planResult = this._plan(this.context);
    }
    // Support sharding by mod, which changes the render sequence and makes the rendered graphic
    // elements uniformed distributed when progress, especially when moving or zooming.
    var lastModBy = normalizeModBy(this._modBy);
    var lastModDataCount = this._modDataCount || 0;
    var modBy = normalizeModBy(performArgs && performArgs.modBy);
    var modDataCount = performArgs && performArgs.modDataCount || 0;
    if (lastModBy !== modBy || lastModDataCount !== modDataCount) {
      planResult = 'reset';
    }
    function normalizeModBy(val) {
      !(val >= 1) && (val = 1); // jshint ignore:line
      return val;
    }
    var forceFirstProgress;
    if (this._dirty || planResult === 'reset') {
      this._dirty = false;
      forceFirstProgress = this._doReset(skip);
    }
    this._modBy = modBy;
    this._modDataCount = modDataCount;
    var step = performArgs && performArgs.step;
    if (upTask) {
      if (process.env.NODE_ENV !== 'production') {
        assert(upTask._outputDueEnd != null);
      }
      this._dueEnd = upTask._outputDueEnd;
    }
    // DataTask or overallTask
    else {
      if (process.env.NODE_ENV !== 'production') {
        assert(!this._progress || this._count);
      }
      this._dueEnd = this._count ? this._count(this.context) : Infinity;
    }
    // Note: Stubs, that its host overall task let it has progress, has progress.
    // If no progress, pass index from upstream to downstream each time plan called.
    if (this._progress) {
      var start = this._dueIndex;
      var end = Math.min(step != null ? this._dueIndex + step : Infinity, this._dueEnd);
      if (!skip && (forceFirstProgress || start < end)) {
        var progress = this._progress;
        if (isArray(progress)) {
          for (var i = 0; i < progress.length; i++) {
            this._doProgress(progress[i], start, end, modBy, modDataCount);
          }
        } else {
          this._doProgress(progress, start, end, modBy, modDataCount);
        }
      }
      this._dueIndex = end;
      // If no `outputDueEnd`, assume that output data and
      // input data is the same, so use `dueIndex` as `outputDueEnd`.
      var outputDueEnd = this._settedOutputEnd != null ? this._settedOutputEnd : end;
      if (process.env.NODE_ENV !== 'production') {
        // ??? Can not rollback.
        assert(outputDueEnd >= this._outputDueEnd);
      }
      this._outputDueEnd = outputDueEnd;
    } else {
      // (1) Some overall task has no progress.
      // (2) Stubs, that its host overall task do not let it has progress, has no progress.
      // This should always be performed so it can be passed to downstream.
      this._dueIndex = this._outputDueEnd = this._settedOutputEnd != null ? this._settedOutputEnd : this._dueEnd;
    }
    return this.unfinished();
  };
  Task.prototype.dirty = function () {
    this._dirty = true;
    this._onDirty && this._onDirty(this.context);
  };
  Task.prototype._doProgress = function (progress, start, end, modBy, modDataCount) {
    iterator.reset(start, end, modBy, modDataCount);
    this._callingProgress = progress;
    this._callingProgress({
      start: start,
      end: end,
      count: end - start,
      next: iterator.next
    }, this.context);
  };
  Task.prototype._doReset = function (skip) {
    this._dueIndex = this._outputDueEnd = this._dueEnd = 0;
    this._settedOutputEnd = null;
    var progress;
    var forceFirstProgress;
    if (!skip && this._reset) {
      progress = this._reset(this.context);
      if (progress && progress.progress) {
        forceFirstProgress = progress.forceFirstProgress;
        progress = progress.progress;
      }
      // To simplify no progress checking, array must has item.
      if (isArray(progress) && !progress.length) {
        progress = null;
      }
    }
    this._progress = progress;
    this._modBy = this._modDataCount = null;
    var downstream = this._downstream;
    downstream && downstream.dirty();
    return forceFirstProgress;
  };
  Task.prototype.unfinished = function () {
    return this._progress && this._dueIndex < this._dueEnd;
  };
  /**
   * @param downTask The downstream task.
   * @return The downstream task.
   */
  Task.prototype.pipe = function (downTask) {
    if (process.env.NODE_ENV !== 'production') {
      assert(downTask && !downTask._disposed && downTask !== this);
    }
    // If already downstream, do not dirty downTask.
    if (this._downstream !== downTask || this._dirty) {
      this._downstream = downTask;
      downTask._upstream = this;
      downTask.dirty();
    }
  };
  Task.prototype.dispose = function () {
    if (this._disposed) {
      return;
    }
    this._upstream && (this._upstream._downstream = null);
    this._downstream && (this._downstream._upstream = null);
    this._dirty = false;
    this._disposed = true;
  };
  Task.prototype.getUpstream = function () {
    return this._upstream;
  };
  Task.prototype.getDownstream = function () {
    return this._downstream;
  };
  Task.prototype.setOutputEnd = function (end) {
    // This only happens in dataTask, dataZoom, map, currently.
    // where dataZoom do not set end each time, but only set
    // when reset. So we should record the set end, in case
    // that the stub of dataZoom perform again and earse the
    // set end by upstream.
    this._outputDueEnd = this._settedOutputEnd = end;
  };
  return Task;
}();
var iterator = function () {
  var end;
  var current;
  var modBy;
  var modDataCount;
  var winCount;
  var it = {
    reset: function (s, e, sStep, sCount) {
      current = s;
      end = e;
      modBy = sStep;
      modDataCount = sCount;
      winCount = Math.ceil(modDataCount / modBy);
      it.next = modBy > 1 && modDataCount > 0 ? modNext : sequentialNext;
    }
  };
  return it;
  function sequentialNext() {
    return current < end ? current++ : null;
  }
  function modNext() {
    var dataIndex = current % winCount * modBy + Math.ceil(current / winCount);
    var result = current >= end ? null : dataIndex < modDataCount ? dataIndex
    // If modDataCount is smaller than data.count() (consider `appendData` case),
    // Use normal linear rendering mode.
    : current;
    current++;
    return result;
  }
}();
// -----------------------------------------------------------------------------
// For stream debug (Should be commented out after used!)
// @usage: printTask(this, 'begin');
// @usage: printTask(this, null, {someExtraProp});
// @usage: Use `__idxInPipeline` as conditional breakpiont.
//
// window.printTask = function (task: any, prefix: string, extra: { [key: string]: unknown }): void {
//     window.ecTaskUID == null && (window.ecTaskUID = 0);
//     task.uidDebug == null && (task.uidDebug = `task_${window.ecTaskUID++}`);
//     task.agent && task.agent.uidDebug == null && (task.agent.uidDebug = `task_${window.ecTaskUID++}`);
//     let props = [];
//     if (task.__pipeline) {
//         let val = `${task.__idxInPipeline}/${task.__pipeline.tail.__idxInPipeline} ${task.agent ? '(stub)' : ''}`;
//         props.push({text: '__idxInPipeline/total', value: val});
//     } else {
//         let stubCount = 0;
//         task.agentStubMap.each(() => stubCount++);
//         props.push({text: 'idx', value: `overall (stubs: ${stubCount})`});
//     }
//     props.push({text: 'uid', value: task.uidDebug});
//     if (task.__pipeline) {
//         props.push({text: 'pipelineId', value: task.__pipeline.id});
//         task.agent && props.push(
//             {text: 'stubFor', value: task.agent.uidDebug}
//         );
//     }
//     props.push(
//         {text: 'dirty', value: task._dirty},
//         {text: 'dueIndex', value: task._dueIndex},
//         {text: 'dueEnd', value: task._dueEnd},
//         {text: 'outputDueEnd', value: task._outputDueEnd}
//     );
//     if (extra) {
//         Object.keys(extra).forEach(key => {
//             props.push({text: key, value: extra[key]});
//         });
//     }
//     let args = ['color: blue'];
//     let msg = `%c[${prefix || 'T'}] %c` + props.map(item => (
//         args.push('color: green', 'color: red'),
//         `${item.text}: %c${item.value}`
//     )).join('%c, ');
//     
//     // 
// };
// window.printPipeline = function (task: any, prefix: string) {
//     const pipeline = task.__pipeline;
//     let currTask = pipeline.head;
//     while (currTask) {
//         window.printTask(currTask, prefix);
//         currTask = currTask._downstream;
//     }
// };
// window.showChain = function (chainHeadTask) {
//     var chain = [];
//     var task = chainHeadTask;
//     while (task) {
//         chain.push({
//             task: task,
//             up: task._upstream,
//             down: task._downstream,
//             idxInPipeline: task.__idxInPipeline
//         });
//         task = task._downstream;
//     }
//     return chain;
// };
// window.findTaskInChain = function (task, chainHeadTask) {
//     let chain = window.showChain(chainHeadTask);
//     let result = [];
//     for (let i = 0; i < chain.length; i++) {
//         let chainItem = chain[i];
//         if (chainItem.task === task) {
//             result.push(i);
//         }
//     }
//     return result;
// };
// window.printChainAEachInChainB = function (chainHeadTaskA, chainHeadTaskB) {
//     let chainA = window.showChain(chainHeadTaskA);
//     for (let i = 0; i < chainA.length; i++) {
//         
//     }
// };

export { Task, createTask };
