优化取名逻辑
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cjd
303
DouyinApi.Services/Naming/BaziCalculator.cs
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303
DouyinApi.Services/Naming/BaziCalculator.cs
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using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace DouyinApi.Services.Naming;
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internal sealed class BaziCalculator
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{
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private static readonly string[] HeavenlyStems =
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{
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"甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"
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};
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private static readonly string[] EarthlyBranches =
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{
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"子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥"
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};
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private static readonly int[] MonthNumberToBranchIndex =
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{
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2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 0, 1
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};
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private static readonly string[] ElementOrder = { "木", "火", "土", "金", "水" };
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private static readonly Dictionary<string, string> StemElements = new()
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{
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["甲"] = "木",
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["乙"] = "木",
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["丙"] = "火",
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["丁"] = "火",
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["戊"] = "土",
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["己"] = "土",
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["庚"] = "金",
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["辛"] = "金",
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["壬"] = "水",
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["癸"] = "水"
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};
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private static readonly Dictionary<string, string> BranchElements = new()
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{
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["子"] = "水",
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["丑"] = "土",
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["寅"] = "木",
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["卯"] = "木",
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["辰"] = "土",
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["巳"] = "火",
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["午"] = "火",
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["未"] = "土",
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["申"] = "金",
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["酉"] = "金",
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["戌"] = "土",
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["亥"] = "水"
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};
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private static readonly Dictionary<string, int> HourStemBaseIndex = new()
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{
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["甲"] = 0,
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["己"] = 0,
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["乙"] = 2,
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["庚"] = 2,
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["丙"] = 4,
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["辛"] = 4,
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["丁"] = 6,
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["壬"] = 6,
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["戊"] = 8,
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["癸"] = 8
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};
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private static readonly Dictionary<string, int> MonthStemBaseIndex = new()
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{
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["甲"] = 2,
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["己"] = 2,
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["乙"] = 4,
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["庚"] = 4,
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["丙"] = 6,
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["辛"] = 6,
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["丁"] = 8,
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["壬"] = 8,
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["戊"] = 0,
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["癸"] = 0
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};
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private static readonly DateTime DayBaseDate = new(1900, 1, 31);
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private const int DayBaseIndex = 0; // 1900-01-31 对应甲子日
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public BaziProfile Calculate(DateTime birthDateTime)
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{
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var solarYear = birthDateTime.Year;
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var currentYearSpring = new DateTime(birthDateTime.Year, 2, 4);
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if (birthDateTime < currentYearSpring)
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{
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solarYear -= 1;
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}
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var yearStemIndex = Mod(solarYear - 4, HeavenlyStems.Length);
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var yearBranchIndex = Mod(solarYear - 4, EarthlyBranches.Length);
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var monthNumber = ResolveMonthNumber(birthDateTime, solarYear);
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var monthStemBase = MonthStemBaseIndex[HeavenlyStems[yearStemIndex]];
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var monthStemIndex = Mod(monthStemBase + monthNumber - 1, HeavenlyStems.Length);
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var monthBranchIndex = MonthNumberToBranchIndex[monthNumber - 1];
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var dayCycleIndex = Mod(DayBaseIndex + (int)(birthDateTime.Date - DayBaseDate).TotalDays, 60);
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var dayStemIndex = Mod(dayCycleIndex, HeavenlyStems.Length);
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var dayBranchIndex = Mod(dayCycleIndex, EarthlyBranches.Length);
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var hourBranchIndex = GetHourBranchIndex(birthDateTime.Hour);
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var hourStemIndex = Mod(HourStemBaseIndex[HeavenlyStems[dayStemIndex]] + hourBranchIndex, HeavenlyStems.Length);
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var yearStem = HeavenlyStems[yearStemIndex];
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var yearBranch = EarthlyBranches[yearBranchIndex];
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var monthStem = HeavenlyStems[monthStemIndex];
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var monthBranch = EarthlyBranches[monthBranchIndex];
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var dayStem = HeavenlyStems[dayStemIndex];
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var dayBranch = EarthlyBranches[dayBranchIndex];
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var hourStem = HeavenlyStems[hourStemIndex];
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var hourBranch = EarthlyBranches[hourBranchIndex];
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var elementCounts = ElementOrder.ToDictionary(element => element, _ => 0);
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IncrementElement(elementCounts, StemElements[yearStem]);
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IncrementElement(elementCounts, BranchElements[yearBranch]);
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IncrementElement(elementCounts, StemElements[monthStem]);
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IncrementElement(elementCounts, BranchElements[monthBranch]);
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IncrementElement(elementCounts, StemElements[dayStem]);
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IncrementElement(elementCounts, BranchElements[dayBranch]);
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IncrementElement(elementCounts, StemElements[hourStem]);
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IncrementElement(elementCounts, BranchElements[hourBranch]);
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var counts = ElementOrder
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.Select(element => new KeyValuePair<string, int>(element, elementCounts[element]))
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.ToList();
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var max = counts.Max(pair => pair.Value);
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var min = counts.Min(pair => pair.Value);
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var isBalanced = max - min <= 1;
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var weakElements = isBalanced
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? Array.Empty<string>()
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: counts.Where(pair => pair.Value == min).Select(pair => pair.Key).ToArray();
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var strongElements = counts.Where(pair => pair.Value == max).Select(pair => pair.Key).ToArray();
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return new BaziProfile(
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yearStem,
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yearBranch,
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monthStem,
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monthBranch,
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dayStem,
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dayBranch,
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hourStem,
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hourBranch,
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elementCounts,
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ElementOrder,
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weakElements,
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strongElements,
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isBalanced);
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}
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private static int ResolveMonthNumber(DateTime dt, int solarYear)
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{
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var springStart = new DateTime(solarYear, 2, 4);
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var jingZhe = new DateTime(solarYear, 3, 6);
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var qingMing = new DateTime(solarYear, 4, 5);
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var liXia = new DateTime(solarYear, 5, 5);
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var mangZhong = new DateTime(solarYear, 6, 6);
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var xiaoShu = new DateTime(solarYear, 7, 7);
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var liQiu = new DateTime(solarYear, 8, 8);
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var baiLu = new DateTime(solarYear, 9, 8);
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var hanLu = new DateTime(solarYear, 10, 8);
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var liDong = new DateTime(solarYear, 11, 7);
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var daXue = new DateTime(solarYear, 12, 7);
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var xiaoHan = new DateTime(solarYear + 1, 1, 6);
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var nextSpring = new DateTime(solarYear + 1, 2, 4);
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if (dt >= springStart && dt < jingZhe)
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{
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return 1;
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}
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if (dt >= jingZhe && dt < qingMing)
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{
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return 2;
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}
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if (dt >= qingMing && dt < liXia)
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{
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return 3;
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}
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if (dt >= liXia && dt < mangZhong)
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{
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return 4;
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}
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if (dt >= mangZhong && dt < xiaoShu)
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{
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return 5;
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}
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if (dt >= xiaoShu && dt < liQiu)
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{
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return 6;
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}
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if (dt >= liQiu && dt < baiLu)
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{
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return 7;
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}
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if (dt >= baiLu && dt < hanLu)
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{
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return 8;
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}
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if (dt >= hanLu && dt < liDong)
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{
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return 9;
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}
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if (dt >= liDong && dt < daXue)
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{
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return 10;
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}
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if (dt >= daXue && dt < xiaoHan)
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{
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return 11;
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}
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if (dt >= xiaoHan && dt < nextSpring)
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{
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return 12;
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}
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return 11;
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}
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private static int GetHourBranchIndex(int hour)
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{
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return ((hour + 1) / 2) % EarthlyBranches.Length;
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}
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private static void IncrementElement(IDictionary<string, int> container, string element)
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{
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if (container.TryGetValue(element, out var value))
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{
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container[element] = value + 1;
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}
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}
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private static int Mod(int value, int modulus)
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{
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var result = value % modulus;
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return result < 0 ? result + modulus : result;
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}
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}
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internal sealed class BaziProfile
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{
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public BaziProfile(
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string yearStem,
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string yearBranch,
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string monthStem,
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string monthBranch,
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string dayStem,
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string dayBranch,
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string hourStem,
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string hourBranch,
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IReadOnlyDictionary<string, int> elementCounts,
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IReadOnlyList<string> elementOrder,
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IReadOnlyList<string> weakElements,
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IReadOnlyList<string> strongElements,
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bool isBalanced)
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{
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YearStem = yearStem;
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YearBranch = yearBranch;
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MonthStem = monthStem;
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MonthBranch = monthBranch;
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DayStem = dayStem;
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DayBranch = dayBranch;
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HourStem = hourStem;
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HourBranch = hourBranch;
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ElementCounts = elementCounts;
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ElementOrder = elementOrder;
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WeakElements = weakElements;
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StrongElements = strongElements;
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IsBalanced = isBalanced;
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}
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public string YearStem { get; }
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public string YearBranch { get; }
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public string MonthStem { get; }
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public string MonthBranch { get; }
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public string DayStem { get; }
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public string DayBranch { get; }
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public string HourStem { get; }
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public string HourBranch { get; }
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public IReadOnlyDictionary<string, int> ElementCounts { get; }
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public IReadOnlyList<string> ElementOrder { get; }
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public IReadOnlyList<string> WeakElements { get; }
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public IReadOnlyList<string> StrongElements { get; }
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public bool IsBalanced { get; }
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}
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