POD 趋势感知 Agent：缓存热点模式 + 三图合成 + 热点去重/风格去重 + review 兜底
- 缓存热点批量流程（有采集缓存不触发 Google） - 简报不足直接从采集缓存生成（轻量补齐） - 三图合成（模特/印花/底图）+ 底图压缩 <2MB - 热点去重→风格去重自动切换 + 不适合类目 review 兜底 - 透明背景（background=transparent）+ 提示词清洗（敏感词/背景描述） - 任务前 basemap 校验 + 模板国家校验 + 模特任务级分配
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"""月份 / 季节 / 临近节日上下文（按国家），供动态种子词生成的 LLM 上下文使用。
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提供 build_holiday_context(country, now=None) -> dict：
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{
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"date": "2026-08-21",
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"year": 2026,
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"month": 8,
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"season": "Summer",
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"month_themes": ["back to school", "late summer", "outdoor adventure"],
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"upcoming_holidays": ["Back to School", "Summer Solstice"]
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}
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- month_themes：固定月度灵感，作为种子词生成的稳定基础。
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- upcoming_holidays：按国家节日表，用窗口计算临近（含刚过的）固定/浮动节日，
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让 LLM 注入"当前该国的可能节日"，生成对应节日主题种子。
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"""
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import datetime
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from typing import Dict, List, Optional
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# 北半球季节（南半球可反向扩展）
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SEASON_BY_MONTH = {
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12: "Winter", 1: "Winter", 2: "Winter",
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3: "Spring", 4: "Spring", 5: "Spring",
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6: "Summer", 7: "Summer", 8: "Summer",
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9: "Autumn", 10: "Autumn", 11: "Autumn",
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}
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# 月度主题词（通用印花设计灵感）
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MONTH_THEMES: Dict[int, List[str]] = {
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1: ["new year", "winter cozy", "resolution"],
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2: ["valentine", "love", "heart"],
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3: ["spring bloom", "st patrick", "fresh start"],
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4: ["easter", "spring garden", "pastel"],
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5: ["mother day", "flower", "spring outdoor"],
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6: ["pride", "summer start", "beach"],
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7: ["summer vibe", "travel", "festival"],
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8: ["back to school", "late summer", "outdoor adventure"],
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9: ["autumn equinox", "harvest", "cozy"],
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10: ["halloween", "autumn goth", "spooky"],
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11: ["thanksgiving", "gratitude", "autumn warm"],
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12: ["christmas", "winter holiday", "cozy festive"],
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}
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# (name, month, day, rule, window_days)
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# rule: None=固定日; "mother"=第2周日; "father"=第3周日; "thanks"=第4周四; "easter"=Computus; "bf"=thanks+1
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_HOLIDAYS_BY_COUNTRY: Dict[str, List[tuple]] = {
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"US": [
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("New Year", 1, 1, None, 14),
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("Valentine's Day", 2, 14, None, 21),
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("St Patrick's Day", 3, 17, None, 14),
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("Easter", 0, 0, "easter", 21),
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("Mother's Day", 5, 0, "mother", 14),
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("Father's Day", 6, 0, "father", 14),
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("Pride Month", 6, 1, None, 7),
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("Independence Day", 7, 4, None, 21),
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("Summer Solstice", 6, 21, None, 14),
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("Back to School", 8, 15, None, 30),
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("Labor Day", 9, 0, "labor", 14),
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("Halloween", 10, 31, None, 30),
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("Thanksgiving (US)", 11, 0, "thanks", 21),
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("Black Friday", 11, 0, "bf", 14),
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("Christmas", 12, 25, None, 30),
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("Winter Solstice", 12, 21, None, 14),
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],
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"GB": [
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("New Year", 1, 1, None, 14),
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("Valentine's Day", 2, 14, None, 21),
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("St Patrick's Day", 3, 17, None, 14),
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("Easter", 0, 0, "easter", 21),
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("Mother's Day (UK)", 3, 0, "mother_uk", 14),
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("Father's Day", 6, 0, "father", 14),
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("Summer Bank Holiday", 8, 25, None, 14),
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("Halloween", 10, 31, None, 30),
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("Bonfire Night", 11, 5, None, 21),
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("Remembrance Day", 11, 11, None, 14),
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("Christmas", 12, 25, None, 30),
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("Boxing Day", 12, 26, None, 14),
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],
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"JP": [
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("New Year", 1, 1, None, 14),
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("Valentine's Day", 2, 14, None, 21),
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("Hinamatsuri", 3, 3, None, 14), # 雏祭
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("Hanami", 4, 1, None, 21), # 花见（樱花季）
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("Golden Week", 4, 29, None, 21),
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("Children's Day", 5, 5, None, 14), # 子供の日
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("Tanabata", 7, 7, None, 14), # 七夕
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("Fireworks Season", 8, 1, None, 30), # 花火大会
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("Obon", 8, 13, None, 21), # お盆
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("Halloween", 10, 31, None, 30),
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("Christmas", 12, 25, None, 30),
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("New Year Eve", 12, 31, None, 14), # 大晦日
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],
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"AU": [
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("New Year", 1, 1, None, 14),
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("Australia Day", 1, 26, None, 21),
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("Valentine's Day", 2, 14, None, 21),
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("Easter", 0, 0, "easter", 21),
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("Anzac Day", 4, 25, None, 21),
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("Mother's Day (AU)", 5, 0, "mother", 14),
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("Father's Day (AU)", 9, 0, "father", 14),
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("Summer Christmas", 12, 25, None, 30),
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("Boxing Day", 12, 26, None, 21),
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("Halloween", 10, 31, None, 21),
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],
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}
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def _easter(year: int) -> datetime.date:
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a = year % 19
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b = year // 100
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c = year % 100
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d = b // 4
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e = b % 4
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f = (b + 8) // 25
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g = (b - f + 1) // 3
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h = (19 * a + b - d - g + 15) % 30
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i = c // 4
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k = c % 4
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l = (32 + 2 * e + 2 * i - h - k) % 7
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m = (a + 11 * h + 22 * l) // 451
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month = (h + l - 7 * m + 114) // 31
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day = ((h + l - 7 * m + 114) % 31) + 1
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return datetime.date(year, month, day)
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def _resolve(name: str, month: int, day: int, rule, year: int) -> Optional[datetime.date]:
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if rule is None:
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return datetime.date(year, month, day)
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if rule == "easter":
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return _easter(year)
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if rule in ("mother", "mother_uk"):
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# 第2个周日（UK 用"母亲节"但实际 3 月第4周日前的第4大斋期周日——简化为 3 月第2周日）
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if rule == "mother_uk":
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month, week = 3, 2
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else:
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month, week = month, 2
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first = datetime.date(year, month, 1)
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return first + datetime.timedelta(days=(6 - first.weekday()) % 7 + (week - 1) * 7)
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if rule == "father":
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first = datetime.date(year, month, 1)
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return first + datetime.timedelta(days=(6 - first.weekday()) % 7 + 2 * 7)
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if rule == "thanks":
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first = datetime.date(year, month, 1)
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return first + datetime.timedelta(days=(3 - first.weekday()) % 7 + 3 * 7)
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if rule == "bf":
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t = _resolve("", 11, 0, "thanks", year)
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return t + datetime.timedelta(days=1) if t else None
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if rule == "labor":
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first = datetime.date(year, month, 1)
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return first + datetime.timedelta(days=(0 - first.weekday()) % 7)
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return None
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def holidays_for(country: str = "US") -> List[tuple]:
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key = (country or "US").upper()
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return _HOLIDAYS_BY_COUNTRY.get(key, _HOLIDAYS_BY_COUNTRY["US"])
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def upcoming_holidays(now: Optional[datetime.date] = None, country: str = "US",
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lower: int = -10) -> List[str]:
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"""返回该国临近（未来 window 内，或刚过 lower 天内）的节日名。"""
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now = now or datetime.date.today()
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out: List[str] = []
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for name, month, day, rule, window in holidays_for(country):
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try:
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d = _resolve(name, month, day, rule, now.year)
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except Exception:
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continue
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if d is None:
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continue
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delta = (d - now).days
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if lower <= delta <= window:
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out.append(name)
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return out
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def build_holiday_context(country: str = "US",
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now: Optional[datetime.date] = None) -> Dict[str, object]:
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now = now or datetime.date.today()
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return {
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"date": now.isoformat(),
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"year": now.year,
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"month": now.month,
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"season": SEASON_BY_MONTH.get(now.month, ""),
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"month_themes": MONTH_THEMES.get(now.month, []),
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"upcoming_holidays": upcoming_holidays(now, country),
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}
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