// 云函数算法辅助模块
// 包含运势生成所需的纯函数，适配 Node.js 环境

// 星曜吉凶定义
const StarNature = {
  JI: 'JI',
  XIONG: 'XIONG',
  ZHONGHE: 'ZHONGHE',
}

// 四化类型
const TransformationType = {
  LU: 'LU',
  QUAN: 'QUAN',
  KE: 'KE',
  JI: 'JI',
}

// 宫位类型
const PalaceType = {
  MING: 'MING',
  XIONG: 'XIONG',
  FUQI: 'FUQI',
  CAI: 'CAI',
  JILU: 'JILU',
  QIAN: 'QIAN',
  GUANLU: 'GUANLU',
  TUDI: 'TUDI',
  FUBEN: 'FUBEN',
  FU: 'FU',
  SHEN: 'SHEN',
  ZINV: 'ZINV',
}

// 地支序数
const BRANCH_INDEX = {
  ZI: 1, CHOU: 2, YIN: 3, MAO: 4,
  CHEN: 5, SI: 6, WU: 7, WEI: 8,
  SHEN: 9, YOU: 10, XU: 11, HAI: 12,
}

// 地支颜色映射
const BRANCH_COLOR_MAP = {
  ZI: '黑色', CHOU: '黄色', YIN: '绿色', MAO: '绿色',
  CHEN: '黄色', SI: '红色', WU: '红色', WEI: '黄色',
  SHEN: '白色', YOU: '白色', XU: '黄色', HAI: '黑色',
}

// 幸运颜色列表
const LUCKY_COLORS = ['红色', '黄色', '蓝色', '绿色', '紫色', '金色', '白色', '黑色']

/**
 * 根据生辰信息和当前日期生成推送内容
 * @param {Object} birthInfo - 用户生辰信息
 * @param {Date} date - 当前日期
 * @returns {Object} 运势内容
 */
function generatePushContent(birthInfo, date) {
  // 基于生辰信息计算基础运势
  const baseScore = calculateBaseScore(birthInfo, date)
  const dailyScore = applyDailyAdjustment(baseScore, date)

  const overallScore = clampScore(dailyScore)
  const overallLuck = determineLuckLevel(overallScore)

  // 各维度运势
  const careerScore = clampScore(overallScore + getDimensionOffset(date, 'career'))
  const wealthScore = clampScore(overallScore + getDimensionOffset(date, 'wealth'))
  const relationshipScore = clampScore(overallScore + getDimensionOffset(date, 'relationship'))
  const healthScore = clampScore(overallScore + getDimensionOffset(date, 'health'))

  const luckyColor = calculateLuckyColor(birthInfo, date)
  const luckyNumber = calculateLuckyNumber(birthInfo, date)

  return {
    overallScore,
    overallLuck,
    careerAdvice: generateDimensionAdvice('事业', careerScore),
    wealthAdvice: generateDimensionAdvice('财运', wealthScore),
    relationshipAdvice: generateDimensionAdvice('感情', relationshipScore),
    healthAdvice: generateDimensionAdvice('健康', healthScore),
    luckyColor,
    luckyNumber,
  }
}

/**
 * 计算基础运势分数
 */
function calculateBaseScore(birthInfo, date) {
  // 根据出生月份和日期计算基础分
  const birthMonth = birthInfo.birthHour != null
    ? (birthInfo.birthHour % 12) + 1
    : (date.getMonth() + 1)
  const birthDay = parseInt(birthInfo.birthDate.split('-')[2] || '15')

  // 基础分 50-70
  const baseScore = 50 + (birthMonth * 3 + birthDay) % 21
  return baseScore
}

/**
 * 应用每日调整
 */
function applyDailyAdjustment(baseScore, date) {
  const dayOfMonth = date.getDate()
  const month = date.getMonth() + 1

  // 月相调整
  let adjustment = 0
  if (dayOfMonth <= 7) adjustment += 2
  else if (dayOfMonth <= 14) adjustment += 1
  else if (dayOfMonth <= 21) adjustment -= 1
  else adjustment -= 2

  // 季节调整
  if (month >= 3 && month <= 5) adjustment += 1  // 春季
  else if (month >= 9 && month <= 11) adjustment -= 1  // 秋季

  return baseScore + adjustment
}

/**
 * 各维度偏移
 */
function getDimensionOffset(date, dimension) {
  const dayOfMonth = date.getDate()
  const month = date.getMonth() + 1

  switch (dimension) {
    case 'career':
      return (dayOfMonth % 5 === 0) ? 5 : (dayOfMonth % 3 === 0) ? 2 : 0
    case 'wealth':
      return (dayOfMonth % 7 === 0) ? 5 : (dayOfMonth % 2 === 0) ? 2 : 0
    case 'relationship':
      return (dayOfMonth % 4 === 0) ? 3 : (month % 2 === 0) ? 1 : 0
    case 'health':
      return (dayOfMonth % 6 === 0) ? 3 : (month % 3 === 0) ? 1 : 0
    default:
      return 0
  }
}

/**
 * 生成各维度建议
 */
function generateDimensionAdvice(name, score) {
  if (score >= 80) {
    return `${name}运势吉显，宜把握良机`
  } else if (score >= 65) {
    return `${name}运势平顺，稳中求进`
  } else if (score >= 50) {
    return `${name}运势一般，谨慎行事`
  } else {
    return `${name}运势欠佳，宜静待时机`
  }
}

/**
 * 计算幸运色
 */
function calculateLuckyColor(birthInfo, date) {
  const birthMonth = parseInt(birthInfo.birthDate.split('-')[1] || '1')
  const baseIndex = (birthMonth - 1) % LUCKY_COLORS.length
  const dayOffset = date.getDate() % 3
  const colorIndex = (baseIndex + dayOffset) % LUCKY_COLORS.length
  return LUCKY_COLORS[colorIndex]
}

/**
 * 计算幸运数字
 */
function calculateLuckyNumber(birthInfo, date) {
  const dayOfMonth = date.getDate()
  const month = date.getMonth() + 1
  const birthDay = parseInt(birthInfo.birthDate.split('-')[2] || '15')
  let num = (dayOfMonth + month + birthDay) % 9
  if (num === 0) num = 9
  return String(num)
}

/**
 * 确定运势等级
 */
function determineLuckLevel(score) {
  if (score >= 90) return '大吉'
  if (score >= 80) return '吉'
  if (score >= 70) return '中吉'
  if (score >= 60) return '平'
  if (score >= 50) return '中平'
  if (score >= 40) return '小凶'
  return '凶'
}

/**
 * 限制分数范围
 */
function clampScore(score) {
  return Math.max(0, Math.min(100, Math.floor(score)))
}

module.exports = {
  generatePushContent,
  determineLuckLevel,
  calculateLuckyColor,
  calculateLuckyNumber,
  PalaceType,
  StarNature,
  TransformationType,
}