"""乐天店铺页 __INITIAL_STATE__ → ShopDetailData

店铺首页（www.rakuten.co.jp/{店铺代码}/）与搜索页一样把状态内联在
`window.__INITIAL_STATE__` 里，店铺信息在顶层的 `shop` 节点下，结构比商品
详情页里的 shop.information 更完整（多出招牌图、39ショップ标记、休息日）。

店铺 logo 不在 state 里，只出现在页面的 ld+json AggregateRating 微数据中。
"""
from __future__ import annotations

import json
import re
from typing import Any

from app.core import site
from app.core.errors import ScrapeParseError
from app.models.scrape import ShopDetailData
from app.utils.coerce import as_dict, as_float, as_int, as_list, as_str

_LD_JSON_RE = re.compile(
    r'<script[^>]*type="application/ld\+json"[^>]*>(.*?)</script>', re.S
)


def _parse_logo_url(html: str) -> str:
    """从 ld+json 的 AggregateRating.itemReviewed 里取店铺 logo"""
    for match in _LD_JSON_RE.finditer(html):
        try:
            data = json.loads(match.group(1))
        except ValueError:
            continue
        if not isinstance(data, dict) or data.get("@type") != "AggregateRating":
            continue
        reviewed = data.get("itemReviewed")
        if isinstance(reviewed, dict):
            return as_str(reviewed.get("logo"))
    return ""


def parse_shop_detail(
    state: dict[str, Any], *, shop_code: str, html: str = ""
) -> ShopDetailData:
    """把店铺页状态解析为商家详情

    Raises:
        ScrapeParseError: 状态中不存在 shop 节点
    """
    shop = state.get("shop")
    if not isinstance(shop, dict) or not shop:
        raise ScrapeParseError("店铺页缺少 shop 节点")

    review = as_dict(shop.get("shopReview"))
    resolved_code = as_str(shop.get("shopCode")) or shop_code
    # state 里的 shopUrl 是 http 的且不带尾斜杠，统一按规范形式给出
    shop_url = f"{site.WWW_BASE_URL}{resolved_code}/" if resolved_code else ""

    holidays = [
        as_str(day)
        for day in as_list(as_dict(as_dict(shop.get("shopCalendar")).get("eventDates")).get("holiday"))
        if as_str(day)
    ]

    return ShopDetailData(
        shop_id=as_int(shop.get("shopId")) or None,
        shop_code=resolved_code,
        shop_name=as_str(shop.get("shopName")),
        shop_url=shop_url,
        introduction=as_str(shop.get("shopIntroduction")),
        signboard_url=as_str(shop.get("signboardUrl")),
        logo_url=_parse_logo_url(html),
        review_score=as_float(review.get("average")),
        review_count=as_int(review.get("total")),
        # 评价数过少时站点不展示评分，此时 average 不可信
        review_displayed=bool(review.get("didMeetDisplayRequirements")),
        is_39_shop=bool(shop.get("is39Shop")),
        age_verification_required=bool(shop.get("ageVerificationFlag")),
        status=as_int(shop.get("status")) if shop.get("status") is not None else None,
        holidays=holidays,
    )