// 每日运势模块 - 基于八字日主 + 日期种子
// 移植自 Python 版本，改写为 JS 并融合八字命理

const DailyFortune = {
    // 运势库
    overall: ["大吉", "中吉", "平", "小凶", "大凶", "半吉", "吉"],
    love: ["甜蜜", "稳定", "小摩擦", "桃花运旺", "平淡", "升温"],
    career: ["顺利", "突破", "平稳", "压力大", "有贵人", "需谨慎"],
    money: ["旺财", "小赚", "收支平衡", "谨慎消费", "偏财运佳", "破财预警"],
    
    // 今日吉言
    quotes: [
        "保持微笑，好运自来",
        "今日宜努力，忌焦虑",
        "心平气和，万事顺遂",
        "机会藏在细节里",
        "相信自己，一切皆好",
        "温柔待人，好运相伴",
        "静心养气，福气自来",
        "积善之家，必有余庆"
    ],

    // 幸运颜色（根据日主五行）
    luckyColors: {
        '木': ['绿色', '青色', '翠绿', '墨绿'],
        '火': ['红色', '紫色', '粉色', '橙色'],
        '土': ['黄色', '棕色', '咖啡色', '卡其色'],
        '金': ['白色', '金色', '银色', '米色'],
        '水': ['黑色', '蓝色', '深蓝', '藏青']
    },

    // 幸运方位
    luckyDirs: {
        '木': '东方',
        '火': '南方',
        '土': '中央',
        '金': '西方',
        '水': '北方'
    },

    // 宜忌事项
    yiItems: ['出行', '会友', '学习', '签约', '求财', '祭祀', '动土', '搬家'],
    jiItems: ['争吵', '借贷', '赌博', '酗酒', '冲动消费', '熬夜', '冒险', '跳槽'],

    // 用日期生成固定种子
    _getSeedByDate() {
        const today = new Date();
        const dateStr = `${today.getFullYear()}-${today.getMonth()+1}-${today.getDate()}`;
        // 简单哈希函数
        let hash = 0;
        for (let i = 0; i < dateStr.length; i++) {
            const char = dateStr.charCodeAt(i);
            hash = ((hash << 5) - hash) + char;
            hash = hash & hash;
        }
        return Math.abs(hash);
    },

    // 基于种子的随机数生成器
    _seededRandom(seed) {
        let s = seed;
        return function() {
            s = (s * 9301 + 49297) % 233280;
            return s / 233280;
        };
    },

    // 获取今日完整运势（基于八字日主）
    getTodayFortune(riGan, wuXing) {
        const seed = this._getSeedByDate();
        const rand = this._seededRandom(seed);

        // 日主五行
        const GAN_WU_XING = { '甲': '木', '乙': '木', '丙': '火', '丁': '火', '戊': '土', '己': '土', '庚': '金', '辛': '金', '壬': '水', '癸': '水' };
        const riWx = GAN_WU_XING[riGan] || '木';

        // 根据日主五行调整运势
        let baseOffset = 0;
        const dayGZ = window.getDayGanZhi 
            ? window.getDayGanZhi(new Date().getFullYear(), new Date().getMonth()+1, new Date().getDate())
            : { gan: '甲' };
        const dayWx = GAN_WU_XING[dayGZ.gan] || '木';

        // 日主生日元 -> 加分
        const wxSheng = { '木': '火', '火': '土', '土': '金', '金': '水', '水': '木' };
        if (wxSheng[riWx] === dayWx) baseOffset += 2;
        if (riWx === dayWx) baseOffset += 1;

        // 生成各维度运势
        const overallMap = { 0: '大凶', 1: '小凶', 2: '平', 3: '小吉', 4: '中吉', 5: '吉', 6: '大吉' };
        const overallIdx = Math.min(6, Math.max(0, Math.floor(rand() * 7) + baseOffset));

        const loveMap = ['平淡', '小摩擦', '稳定', '升温', '甜蜜', '桃花运旺'];
        const careerMap = ['压力大', '需谨慎', '平稳', '顺利', '有贵人', '突破'];
        const moneyMap = ['破财预警', '谨慎消费', '收支平衡', '小赚', '旺财', '偏财运佳'];

        const overall = overallMap[overallIdx];
        const love = loveMap[Math.floor(rand() * loveMap.length)];
        const career = careerMap[Math.floor(rand() * careerMap.length)];
        const money = moneyMap[Math.floor(rand() * moneyMap.length)];
        const quote = this.quotes[Math.floor(rand() * this.quotes.length)];

        // 幸运信息
        const luckyColor = this.luckyColors[riWx] ? 
            this.luckyColors[riWx][Math.floor(rand() * this.luckyColors[riWx].length)] : '红色';
        const luckyDir = this.luckyDirs[riWx] || '东方';
        const luckyNum = Math.floor(rand() * 9) + 1;
        const luckyNum2 = Math.floor(rand() * 9) + 1;

        // 宜忌
        let yi = ['出行', '会友'];
        let ji = ['熬夜'];
        if (['旺财', '偏财运佳'].includes(money)) { yi.push('求财', '投资'); ji.push('借贷'); }
        if (['顺利', '突破', '有贵人'].includes(career)) { yi.push('签约', '面试'); ji.push('跳槽'); }
        if (['甜蜜', '升温', '桃花运旺'].includes(love)) { yi.push('约会'); ji.push('争吵'); }

        return {
            星座: riGan + '日主',
            今日日期: new Date().toISOString().split('T')[0],
            综合运势: overall,
            爱情运势: love,
            事业运势: career,
            财运运势: money,
            今日吉言: quote,
            幸运颜色: luckyColor,
            幸运方位: luckyDir,
            幸运数字: luckyNum + '、' + luckyNum2,
            宜: yi.slice(0, 4),
            忌: ji.slice(0, 3)
        };
    }
};

// 如果全局有 getDayGanZhi 函数就使用，否则提供备用
if (typeof getDayGanZhi === 'undefined') {
    window.getDayGanZhi = function(y, m, d) {
        const baseDate = new Date(1900, 0, 31);
        const targetDate = new Date(y, m-1, d);
        const diffDays = Math.floor((targetDate - baseDate) / 86400000);
        const ganIdx = (0 + diffDays) % 10;
        const zhiIdx = (4 + diffDays) % 12;
        const TG = ['甲','乙','丙','丁','戊','己','庚','辛','壬','癸'];
        const DZ = ['子','丑','寅','卯','辰','巳','午','未','申','酉','戌','亥'];
        return { gan: TG[ganIdx], zhi: DZ[zhiIdx] };
    };
}

// ========== 兼容接口：calculateFortune() ==========
// 老板提供的简化版接口，调用完整版 DailyFortune 实现
function calculateFortune() {
    // 运势库（与老板原版一致）
    const overall = ["大吉", "吉", "中平", "平", "半吉", "小凶"];
    const love = ["甜蜜", "稳定", "小摩擦", "桃花运旺", "平淡"];
    const career = ["顺利", "突破", "平稳", "压力大", "有贵人"];
    const money = ["旺财", "小赚", "收支平衡", "谨慎消费", "偏财运佳"];
    const quotes = [
        "保持微笑，好运自来",
        "今日宜努力，忌焦虑",
        "心平气和，万事顺遂",
        "机会藏在细节里",
        "相信自己，一切皆好",
        "温柔待人，好运相伴"
    ];

    // 用今天日期做种子，保证同一天运势不变
    const today = new Date().toDateString();
    let seed = 0;
    for (let i = 0; i < today.length; i++) {
        seed = (seed << 5) - seed + today.charCodeAt(i);
    }
    const random = (min, max) => {
        seed = Math.sin(seed) * 10000;
        seed = seed - Math.floor(seed);
        return Math.floor(seed * (max - min)) + min;
    };

    // 随机抽取运势
    const res = {
        综合运势: overall[random(0, overall.length)],
        爱情运势: love[random(0, love.length)],
        事业运势: career[random(0, career.length)],
        财运运势: money[random(0, money.length)],
        今日吉言: quotes[random(0, quotes.length)]
    };

    return res;
}

// 同时挂载到 window，确保全局可调用
window.calculateFortune = calculateFortune;