import { getTrigramByNumber, getRelation, WUXING_SHENG, WUXING_KE } from './trigrams.js';
import { getHexagram, getChangedHexagram, getMutualHexagram } from './hexagrams.js';
// 获取当前节气（用于判断旺衰）
function getCurrentJieqi() {
    const now = new Date();
    const month = now.getMonth() + 1;
    // 简化版：按月份判断大致季节
    if (month >= 3 && month <= 4)
        return '春（寅卯月）';
    if (month >= 5 && month <= 6)
        return '夏（巳午月）';
    if (month >= 7 && month <= 8)
        return '夏末（未申月）';
    if (month >= 9 && month <= 10)
        return '秋（酉戌月）';
    if (month >= 11 || month <= 1)
        return '冬（亥子月）';
    return '冬末（丑寅月）';
}
// 判断五行在当季旺衰
function isElementWang(element, season) {
    if (season.includes('春') && element === '木')
        return true;
    if (season.includes('夏') && element === '火')
        return true;
    if (season.includes('秋') && element === '金')
        return true;
    if (season.includes('冬') && element === '水')
        return true;
    if (season.includes('末') && element === '土')
        return true;
    return false;
}
// 核心排盘
export function calculateHua(input) {
    let upperNum, lowerNum, dongYao;
    if (input.method === 'number' && input.numbers) {
        // 数字起卦
        const nums = input.numbers;
        upperNum = nums[0] % 8 || 8;
        lowerNum = nums[1] % 8 || 8;
        dongYao = nums.length >= 3 ? (nums[0] + nums[1] + nums[2]) % 6 || 6 : (nums[0] + nums[1]) % 6 || 6;
    }
    else if (input.method === 'time') {
        // 时间起卦：年月日时
        const now = new Date();
        const year = now.getFullYear();
        const month = now.getMonth() + 1;
        const day = now.getDate();
        const hour = now.getHours();
        const minute = now.getMinutes();
        upperNum = (year + month + day) % 8 || 8;
        lowerNum = (year + month + day + hour) % 8 || 8;
        dongYao = (year + month + day + hour + minute) % 6 || 6;
    }
    else if (input.method === 'observation' && input.observedTrigrams) {
        // 梅花心易：从外应推导
        const nums = input.observedTrigrams;
        upperNum = nums[0] % 8 || 8;
        lowerNum = nums[1] % 8 || 8;
        dongYao = nums.length >= 3 ? nums[2] % 6 || 6 : (nums[0] + nums[1]) % 6 || 6;
    }
    else {
        throw new Error('无效的起卦参数');
    }
    const upperTrigram = getTrigramByNumber(upperNum);
    const lowerTrigram = getTrigramByNumber(lowerNum);
    const mainHex = getHexagram(upperNum, lowerNum);
    // 体用判断：动爻在下卦(1-3)则下卦为用、上卦为体；动爻在上卦(4-6)则上卦为用、下卦为体
    const tiPosition = dongYao <= 3 ? 'upper' : 'lower';
    const yongPosition = dongYao <= 3 ? 'lower' : 'upper';
    const tiTrigram = tiPosition === 'upper' ? upperTrigram : lowerTrigram;
    const yongTrigram = yongPosition === 'upper' ? upperTrigram : lowerTrigram;
    // 变卦
    const changedHex = getChangedHexagram(upperNum, lowerNum, dongYao);
    // 互卦
    const mutualHex = getMutualHexagram(upperNum, lowerNum);
    // 五行分析
    const relation = getRelation(tiTrigram.element, yongTrigram.element);
    let verdict = '';
    if (WUXING_SHENG[yongTrigram.element] === tiTrigram.element) {
        verdict = '用生体：外来助力，事易成，有人帮助。';
    }
    else if (WUXING_SHENG[tiTrigram.element] === yongTrigram.element) {
        verdict = '体生用：我泄气于外，耗损之象，需付出较多。';
    }
    else if (WUXING_KE[yongTrigram.element] === tiTrigram.element) {
        verdict = '用克体：外来压力大，受制于人，事难成。';
    }
    else if (WUXING_KE[tiTrigram.element] === yongTrigram.element) {
        verdict = '体克用：我能制外，事可成但需努力。';
    }
    else {
        verdict = '体用比和：势均力敌，事可成，和合之象。';
    }
    // 旺衰
    const season = getCurrentJieqi();
    const tiWang = isElementWang(tiTrigram.element, season);
    const yongWang = isElementWang(yongTrigram.element, season);
    const wangAnalysis = `当令${season}。体卦${tiTrigram.element}${tiWang ? '旺' : '衰'}，用卦${yongTrigram.element}${yongWang ? '旺' : '衰'}。`;
    return {
        mainHexagram: { upper: upperTrigram, lower: lowerTrigram, hexagram: mainHex },
        tiGua: { trigram: tiTrigram, position: tiPosition },
        yongGua: { trigram: yongTrigram, position: yongPosition },
        dongYao,
        changedHexagram: changedHex,
        mutualHexagram: mutualHex,
        wuxingAnalysis: { tiElement: tiTrigram.element, yongElement: yongTrigram.element, relation, verdict },
        wangShuai: { season, tiWang, yongWang, analysis: wangAnalysis },
        meta: {
            method: input.method,
            inputNumbers: input.numbers || [],
            question: input.question,
            timestamp: new Date().toISOString(),
        },
    };
}