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/*
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 *  This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
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 *  License: MS-RSL – see LICENSE.md for details
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 */
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import { Map } from "immutable";
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export function nbgrader_status(assignment: Map<string, any>): {
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  succeeded: number;
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  failed: number;
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  not_attempted: number;
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  attempted: number;
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} {
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  const student_ids = assignment.get("last_collect").keySeq().toJS(); // students whose work has been collected
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  const scores = assignment.get("nbgrader_scores");
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  const result = { succeeded: 0, failed: 0, not_attempted: 0, attempted: 0 };
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  if (scores == null) {
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    result.not_attempted = student_ids.length;
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  } else {
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    for (const student_id of student_ids) {
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      const state = grading_state(student_id, scores);
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      result[state] += 1;
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    }
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  }
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  result.attempted = result.succeeded + result.failed;
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  return result;
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}
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type GradingState = "succeeded" | "failed" | "not_attempted";
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export function grading_state(
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  student_id: string,
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  nbgrader_scores,
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): GradingState {
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  const x = nbgrader_scores?.get(student_id);
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  if (x == null) {
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    return "not_attempted";
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  } else {
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    for (const [_, val] of x) {
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      if (typeof val == "string") {
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        return "failed";
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      }
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    }
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    return "succeeded";
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  }
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}
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