"""产品推介材料确定性合规检查。"""

import re
from dataclasses import dataclass
from typing import Any

from app.core.promotion_material_contracts import MANDATORY_RISK_DISCLOSURE


@dataclass(frozen=True)
class ComplianceFinding:
    rule_code: str
    rule_name: str
    scope: str
    severity: str
    hit_text: str | None
    suggestion: str


BLOCKED_PHRASES = (
    "保本",
    "稳赚",
    "无风险",
    "保证收益",
    "快速募集",
    "抢购",
    "稳赚不赔",
    "本金无忧",
)


class PromotionComplianceChecker:
    """不依赖模型的输入和文案规则检查器。"""

    def check_inputs(self, inputs: dict[str, Any]) -> list[ComplianceFinding]:
        findings: list[ComplianceFinding] = []
        required_paths = (
            ("product_info", "fund_type"),
            ("product_info", "operation_mode"),
            ("product_info", "investment_objective"),
            ("manager_info", "management_company"),
            ("manager_info", "registration_code"),
            ("manager_info", "manager_name"),
            ("team_info", "team_description"),
            ("strategy_info", "investment_scope"),
            ("strategy_info", "strategy"),
            ("strategy_info", "restrictions"),
        )
        for group, field in required_paths:
            value = inputs.get(group, {}).get(field)
            if not str(value or "").strip():
                findings.append(ComplianceFinding(
                    f"required.{group}.{field}", "必填信息缺失", "input", "block",
                    None, f"请补充 {group}.{field}",
                ))
        fees = inputs.get("fee_structure", {})
        fee_fields = (
            "subscription_fee",
            "purchase_fee",
            "redemption_fee",
            "sales_service_fee",
            "management_fee",
            "custody_fee",
            "client_maintenance_fee",
        )
        missing_fees = [
            field for field in fee_fields if not str(fees.get(field) or "").strip()
        ]
        if missing_fees:
            findings.append(ComplianceFinding(
                "fee_structure.incomplete", "费用结构未完整揭示", "input", "block",
                "、".join(missing_fees), "请逐项填写费率，暂不适用的项目填写“不适用”",
            ))
        performance = inputs.get("performance_info", {})
        if performance.get("show_product_performance"):
            months = performance.get("history_months")
            if not isinstance(months, int) or months <= 6:
                findings.append(ComplianceFinding(
                    "performance.history_short", "业绩展示区间不超过六个月",
                    "input", "block", str(months), "不得展示为本基金历史业绩",
                ))
        ranking = performance.get("ranking", {})
        if ranking.get("enabled"):
            years = self._years(ranking.get("evaluation_period_years"))
            if years < 3 or not ranking.get("institution_name") or not ranking.get(
                "public_source"
            ):
                findings.append(ComplianceFinding(
                    "performance.ranking_source_invalid", "业绩排名来源不满足要求",
                    "input", "block", ranking.get("ranking_text"), "补充三年期以上公开评价数据来源",
                ))
        shows_performance = (
            performance.get("show_product_performance")
            or performance.get("show_manager_performance")
        )
        if shows_performance and not performance.get("performance_attachment_id"):
            findings.append(ComplianceFinding(
                "performance.data_attachment_missing", "业绩曲线数据附件缺失",
                "input", "block", None, "上传包含产品、基准或代表产品曲线的 CSV/XLSX 文件",
            ))
        return findings

    def check_draft(
        self, draft: dict[str, Any], inputs: dict[str, Any]
    ) -> list[ComplianceFinding]:
        text = self._flatten_text(draft)
        findings: list[ComplianceFinding] = []
        for phrase in BLOCKED_PHRASES:
            if phrase in text:
                findings.append(ComplianceFinding(
                    "copy.blocked_phrase", "宣传禁用表达", "generated_text", "block",
                    phrase, "删除收益承诺、无风险或快速募集导向的表达",
                ))
        if MANDATORY_RISK_DISCLOSURE not in text:
            findings.append(ComplianceFinding(
                "disclosure.mandatory", "法定风险声明缺失", "generated_text", "block",
                None, "必须保留完整风险声明",
            ))
        manager = inputs.get("manager_info", {})
        if manager.get("employment_years") and manager.get("investment_management_experience"):
            if re.search(r"(从业年限|投资管理经验).{0,8}(等同|即|就是|等于)", text):
                findings.append(ComplianceFinding(
                    "manager.experience_distinction", "从业年限与投资管理经验混淆",
                    "generated_text", "block", "从业年限/投资管理经验",
                    "分别说明两个口径，不得互相替代",
                ))
        performance = inputs.get("performance_info", {})
        if (
            performance.get("show_product_performance")
            or performance.get("show_manager_performance")
        ):
            months = performance.get("history_months")
            if not isinstance(months, int) or months <= 6:
                findings.append(ComplianceFinding(
                    "performance.history_claim", "业绩展示区间不超过六个月",
                    "generated_text", "block", "本基金历史业绩", "改为不展示本基金业绩",
                ))
        has_return = any(
            performance.get(key)
            for key in ("product_return", "max_drawdown", "volatility", "sharpe_ratio")
        )
        has_risk = all(
            performance.get(key)
            for key in ("max_drawdown", "volatility", "sharpe_ratio")
        )
        shows_performance = (
            performance.get("show_product_performance")
            or performance.get("show_manager_performance")
        )
        if (has_return or shows_performance) and not has_risk:
            findings.append(ComplianceFinding(
                "performance.risk_metrics_missing", "业绩展示缺少风险指标",
                "generated_text", "block", None, "同时展示最大回撤、波动率和夏普比率",
            ))
        return findings

    @staticmethod
    def _years(value: object) -> int:
        match = re.search(r"\d+", str(value or ""))
        return int(match.group()) if match else 0

    @staticmethod
    def _flatten_text(value: object) -> str:
        if isinstance(value, dict):
            return " ".join(
                PromotionComplianceChecker._flatten_text(item) for item in value.values()
            )
        if isinstance(value, list):
            return " ".join(PromotionComplianceChecker._flatten_text(item) for item in value)
        return str(value or "")