202 lines
8.7 KiB
C#
202 lines
8.7 KiB
C#
using YD_Event.Application.Scoring.Dtos;
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namespace YD_Event.Application.Scoring;
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/// <summary>
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/// 成绩聚合与排名计算服务。
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/// 规定赛：T1=3 名创意编排裁判创意分的平均值，T2=3 名完成质量裁判完成分的平均值，
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/// T3=主裁违例扣分（每项扣 5 分）合计，总分=T1+T2-T3，均四舍五入保留两位小数。
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/// 排名：总分高者在前，总分相同依次比较 T2、T1，全部相同则并列，其后名次按 N+M 规则顺延。
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/// </summary>
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public static class EntryResultCalculationService
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{
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/// <summary>
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/// 把某个出场的各裁判评分单聚合成一条成绩。judgeNames 用于在计算明细里带上裁判姓名，可为空。
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/// </summary>
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public static EntryAggregateResult Aggregate(ScoreRuleConfig config, List<EventJudgeScoreSheet> sheets,
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IReadOnlyDictionary<long, string>? judgeNames = null)
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{
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var result = new EntryAggregateResult { Formula = BuildFormula(config) };
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var total = 0m;
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foreach (var role in config.RoleAggregations)
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{
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var symbol = new EntrySymbolScore
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{
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Symbol = role.Symbol, Label = role.Label, RoleType = role.RoleType,
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Aggregate = role.Aggregate, Sign = role.Sign
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};
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var roleSheets = sheets
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.Where(x => string.Equals(JudgeRoleSchemaService.NormalizeRoleType(x.JudgeRoleType), role.RoleType, StringComparison.OrdinalIgnoreCase))
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.OrderBy(x => x.JudgeRole).ThenBy(x => x.Id)
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.ToList();
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foreach (var sheet in roleSheets)
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{
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symbol.Judges.Add(new EntryJudgeScore
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{
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ScoreSheetId = sheet.Id, RefereeId = sheet.RefereeId,
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JudgeName = judgeNames != null && judgeNames.TryGetValue(sheet.RefereeId, out var name) ? name : null,
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JudgeRole = sheet.JudgeRole, JudgeRoleType = sheet.JudgeRoleType,
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Value = SheetValue(sheet, role.SourceField), IsDisqualified = sheet.IsDisqualified
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});
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}
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// 该类型暂无裁判提交时按 0 分计入，成绩是否可用由调用方按提交进度判断。
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symbol.Value = config.Round(Combine(symbol.Judges.Select(x => x.Value).ToList(), role.Aggregate));
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result.Symbols.Add(symbol);
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ApplyTargetField(result, role.TargetField, symbol.Value);
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total += role.Sign * symbol.Value;
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}
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result.TotalScore = config.Round(total);
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// 任一裁判判定取消资格即取消该出场成绩，取消资格后不计总分、不参与排名。
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var disqualified = sheets.FirstOrDefault(x => x.IsDisqualified);
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if (disqualified != null)
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{
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result.IsDisqualified = true;
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result.DisqualifyReasonCode = disqualified.DisqualifyReasonCode;
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result.TotalScore = 0m;
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}
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return result;
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}
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/// <summary>
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/// 按规则的并列比较顺序计算名次，名次并列时其后名次按 N+M 规则顺延（两个并列第一，下一名为第三名）
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/// </summary>
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public static void AssignRanks(List<RankCandidate> candidates, ScoreRuleConfig config)
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{
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var fields = ResolveTieBreakers(config);
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var ranked = new List<RankCandidate>();
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foreach (var candidate in candidates)
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{
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candidate.Rank = 0;
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if (candidate.IsRanked && !candidate.IsDisqualified) ranked.Add(candidate);
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}
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ranked.Sort((left, right) => Compare(left, right, fields));
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var rank = 1;
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var index = 0;
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while (index < ranked.Count)
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{
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// 所有比较字段都相等的视为并列。
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var tied = 1;
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while (index + tied < ranked.Count && Compare(ranked[index], ranked[index + tied], fields) == 0) tied++;
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for (var i = 0; i < tied; i++) ranked[index + i].Rank = rank;
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index += tied;
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rank += tied;
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}
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}
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/// <summary>
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/// 生成计分公式文本，如 T1 + T2 - T3
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/// </summary>
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public static string BuildFormula(ScoreRuleConfig config)
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{
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var text = new System.Text.StringBuilder();
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foreach (var role in config.RoleAggregations)
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{
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if (text.Length == 0) text.Append(role.Sign < 0 ? "-" + role.Symbol : role.Symbol);
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else text.Append(role.Sign < 0 ? " - " : " + ").Append(role.Symbol);
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}
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return text.ToString();
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}
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/// <summary>
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/// 计算明细 JSON，落库到成绩的 CalculationJson，成绩复核与申诉时可完整还原计算过程
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/// </summary>
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public static string BuildCalculationJson(EntryAggregateResult result, ScoreRuleConfig config)
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{
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return JsonConvert.SerializeObject(new
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{
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ruleType = config.RuleType,
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formula = result.Formula,
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scoreDecimals = config.ScoreDecimals,
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totalScore = result.TotalScore,
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isDisqualified = result.IsDisqualified,
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disqualifyReasonCode = result.DisqualifyReasonCode,
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symbols = result.Symbols.Select(x => new
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{
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x.Symbol, x.Label, x.RoleType, x.Aggregate, x.Sign, x.Value, x.JudgeCount,
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judges = x.Judges.Select(j => new { j.ScoreSheetId, j.RefereeId, j.JudgeName, j.JudgeRole, j.Value })
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})
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});
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}
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/// <summary>
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/// 解析并列比较字段，字段名前加“-”表示该项越小越靠前
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/// </summary>
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private static List<(string Field, bool Ascending)> ResolveTieBreakers(ScoreRuleConfig config)
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{
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var fields = new List<(string, bool)>();
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foreach (var raw in config.TieBreakers)
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{
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var text = (raw ?? string.Empty).Trim();
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if (text.Length == 0) continue;
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var ascending = text.StartsWith('-');
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fields.Add((ascending ? text[1..] : text, ascending));
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}
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if (fields.Count == 0) fields.Add((nameof(RankCandidate.TotalScore), false));
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return fields;
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}
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/// <summary>
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/// 按比较字段顺序比较两条成绩，返回负数表示 left 名次更靠前
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/// </summary>
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private static int Compare(RankCandidate left, RankCandidate right, List<(string Field, bool Ascending)> fields)
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{
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foreach (var (field, ascending) in fields)
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{
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var compared = left.FieldValue(field).CompareTo(right.FieldValue(field));
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if (compared == 0) continue;
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return ascending ? compared : -compared;
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}
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return 0;
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}
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/// <summary>
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/// 多名裁判之间的聚合。人数不固定时用平均值，因此裁判人数变化不影响计分口径。
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/// </summary>
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private static decimal Combine(List<decimal> values, string aggregate)
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{
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if (values.Count == 0) return 0m;
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return aggregate switch
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{
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ScoreRuleConfig.AggregateSum => values.Sum(),
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ScoreRuleConfig.AggregateMax => values.Max(),
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ScoreRuleConfig.AggregateMin => values.Min(),
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_ => values.Sum() / values.Count
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};
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}
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/// <summary>
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/// 按配置的字段名取评分单上的分值
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/// </summary>
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private static decimal SheetValue(EventJudgeScoreSheet sheet, string field) => field switch
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{
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nameof(EventJudgeScoreSheet.DifficultyScore) => sheet.DifficultyScore,
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nameof(EventJudgeScoreSheet.PerformanceScore) => sheet.PerformanceScore,
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nameof(EventJudgeScoreSheet.RequiredScore) => sheet.RequiredScore,
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nameof(EventJudgeScoreSheet.DeductionScore) => sheet.DeductionScore,
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nameof(EventJudgeScoreSheet.RequiredCompletedCount) => sheet.RequiredCompletedCount,
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nameof(EventJudgeScoreSheet.RequiredMissingCount) => sheet.RequiredMissingCount,
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nameof(EventJudgeScoreSheet.TotalScore) => sheet.TotalScore,
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// 宁可报错也不能按 0 分静默计入，避免规则配置写错却算出一份看似正常的成绩。
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_ => throw Oops.Bah($"计分规则配置的取值字段{field}无效")
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};
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/// <summary>
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/// 把聚合结果写入成绩对应的分值字段
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/// </summary>
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private static void ApplyTargetField(EntryAggregateResult result, string field, decimal value)
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{
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switch (field)
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{
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case nameof(EventResult.DifficultyScore): result.DifficultyScore = value; break;
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case nameof(EventResult.PerformanceScore): result.PerformanceScore = value; break;
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case nameof(EventResult.RequiredScore): result.RequiredScore = value; break;
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case nameof(EventResult.DeductionScore): result.DeductionScore = value; break;
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default: throw Oops.Bah($"计分规则配置的成绩字段{field}无效");
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}
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}
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}
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