from __future__ import annotations

from dataclasses import dataclass
from typing import Any, Callable, Dict, Awaitable

from db.customer_risk_db import risk_db
from utils.content_filter import should_block_customer_smart


@dataclass
class RiskDecision:
    blocked: bool
    category: str = "none"
    reason: str = ""
    source: str = "none"  # manual/ai_filter/fallback
    profile: Dict[str, Any] | None = None


class RiskService:
    def evaluate_customer(self, customer_id: str) -> Dict[str, Any]:
        return risk_db.evaluate_customer(customer_id)

    def check_manual_block(self, customer_id: str) -> RiskDecision:
        profile = self.evaluate_customer(customer_id)
        if bool(profile.get("do_not_serve")):
            return RiskDecision(
                blocked=True,
                category="manual_block",
                reason="do_not_serve",
                source="manual",
                profile=profile,
            )
        return RiskDecision(blocked=False, source="manual", profile=profile)

    async def check_text_block(
        self,
        text: str,
        *,
        political_detector: Callable[[str], bool],
        map_detector: Callable[[str], bool],
    ) -> RiskDecision:
        try:
            hit, category, reason = await should_block_customer_smart(text)
            map_hit = map_detector(text) or category == "map"
            political_hit = political_detector(text) or category == "political"
            if hit or map_hit or political_hit:
                c = category
                if map_hit:
                    c = "map"
                elif political_hit:
                    c = "political"
                return RiskDecision(
                    blocked=True,
                    category=c or "other",
                    reason=reason or "sensitive_text",
                    source="ai_filter",
                )
            return RiskDecision(blocked=False, category="none", source="ai_filter")
        except Exception:
            map_hit = map_detector(text)
            political_hit = political_detector(text)
            if map_hit:
                return RiskDecision(blocked=True, category="map", reason="fallback_match", source="fallback")
            if political_hit:
                return RiskDecision(blocked=True, category="political", reason="fallback_match", source="fallback")
            return RiskDecision(blocked=False, category="none", source="fallback")

    @staticmethod
    def build_reject_text(category: str) -> str:
        if category == "map":
            return "地图这类不做哈，这边不接地图相关需求。"
        if category == "sexual":
            return "这类不做哈，涉黄擦边内容都不接。"
        if category == "violent":
            return "这类不做哈，暴力血腥相关都不接。"
        if category == "political":
            return "这类不做哈，政治相关图片和人物都不接。"
        return "这类不做哈，这边不接这类需求。"