竞品SKU本体 — 竞争关系图谱建模、差异化标签与定价策略连接

"""
竞品 SKU 本体
功能：竞品关系建模 / 价格监控 / 差异化分析 / 竞争机会标签
"""
from dataclasses import dataclass, field
from typing import Optional
import warnings
warnings.filterwarnings('ignore')


@dataclass
class CompetitorSKU:
    asin: str
    title: str
    brand: str
    price_usd: float
    rating: float
    review_count: int
    bsr: int                # Best Seller Rank
    monthly_sales_est: int
    competition_type: str   # DIRECT / SUBSTITUTE / PRICE_LEADER
    quality_tier: str       # HIGH / MEDIUM / LOW
    our_sku_id: Optional[str] = None  # 我们的哪个SKU在竞争
    tags: dict = field(default_factory=dict)


def analyze_competitive_position(our_sku: dict, competitors: list) -> dict:
    """分析竞争位置并生成标签"""
    our_price = our_sku["price_usd"]
    our_rating = our_sku["rating"]
    our_bsr = our_sku["bsr"]

    # 价格分析
    direct_prices = [c.price_usd for c in competitors if c.competition_type == "DIRECT"]
    price_leader = min(competitors, key=lambda c: c.price_usd)
    avg_comp_price = sum(direct_prices) / max(1, len(direct_prices)) if direct_prices else our_price
    price_position = "ABOVE_MARKET" if our_price > avg_comp_price * 1.1 else (
        "BELOW_MARKET" if our_price < avg_comp_price * 0.9 else "AT_MARKET")

    # 评分分析
    avg_comp_rating = sum(c.rating for c in competitors if c.competition_type == "DIRECT") / max(1, len(competitors))
    rating_advantage = our_rating - avg_comp_rating
    rating_position = "LEADER" if rating_advantage > 0.3 else ("COMPETITIVE" if rating_advantage > -0.1 else "LAGGING")

    # 最大威胁竞品
    biggest_threat = max(competitors, key=lambda c: c.monthly_sales_est)

    tags = {
        "market.price_position": price_position,
        "market.rating_position": rating_position,
        "market.biggest_threat_asin": biggest_threat.asin,
        "market.price_gap_pct": round((our_price - avg_comp_price) / avg_comp_price * 100, 1),
        "market.rating_gap": round(rating_advantage, 2),
        "competitor.price_leader_price": price_leader.price_usd,
    }

    opportunities = []
    if biggest_threat.rating < our_rating - 0.3:
        opportunities.append(f"竞品{biggest_threat.brand}评分低{our_rating-biggest_threat.rating:.1f}分，可强化差异化营销")
    if price_position == "ABOVE_MARKET":