from __future__ import annotations

from dataclasses import dataclass, field
from typing import Any


@dataclass
class SecurityWarning:
    level: str
    code: str
    message: str
    suggestion: str = ""


@dataclass
class SecurityAuditResult:
    warnings: list[SecurityWarning] = field(default_factory=list)

    @property
    def has_critical(self) -> bool:
        return any(w.level == "critical" for w in self.warnings)

    @property
    def has_warnings(self) -> bool:
        return len(self.warnings) > 0


def audit_feishu_security(config: dict[str, Any]) -> SecurityAuditResult:
    warnings: list[SecurityWarning] = []

    group_policy = config.get("group_policy", config.get("groupPolicy", "allowlist"))
    if group_policy == "allowall":
        group_policy = "open"
        warnings.append(
            SecurityWarning(
                level="info",
                code="FEISHU_GROUP_POLICY_LEGACY_ALIAS",
                message="groupPolicy 使用了已废弃的 'allowall' 值，已自动转换为 'open'",
                suggestion="建议将配置从 'allowall' 更新为 'open'",
            )
        )

    dm_policy = config.get("dm_policy", config.get("dmPolicy", "pairing"))
    allowlist = config.get("allowlist", config.get("allowFrom", []))
    default_account = config.get("defaultAccount", "")

    if group_policy == "open":
        warnings.append(
            SecurityWarning(
                level="warning",
                code="FEISHU_GROUP_POLICY_OPEN",
                message="群聊策略设置为 'open'，所有群聊中的用户都可以与机器人交互",
                suggestion="建议设置为 'allowlist' 并使用 allowFrom 限制可访问的群聊",
            )
        )

    if group_policy == "disabled":
        warnings.append(
            SecurityWarning(
                level="info",
                code="FEISHU_GROUP_POLICY_DISABLED",
                message="群聊功能已禁用",
                suggestion="如需启用群聊功能，请修改 groupPolicy 为 'open' 或 'allowlist'",
            )
        )

    if not allowlist:
        if group_policy == "allowlist" or dm_policy == "allowlist":
            warnings.append(
                SecurityWarning(
                    level="critical",
                    code="FEISHU_EMPTY_ALLOWLIST",
                    message="allowFrom 白名单为空，但策略要求白名单验证",
                    suggestion="请在 allowFrom 中配置至少一个允许的用户或群组 ID",
                )
            )

    if dm_policy == "open":
        warnings.append(
            SecurityWarning(
                level="info",
                code="FEISHU_DM_POLICY_OPEN",
                message="私聊策略设置为 'open'，所有用户都可以向机器人发送私信",
                suggestion="如需限制，可设置为 'pairing' 或 'allowlist'",
            )
        )

    accounts = config.get("accounts", {})
    if default_account and isinstance(accounts, dict) and default_account not in accounts:
        warnings.append(
            SecurityWarning(
                level="warning",
                code="FEISHU_DEFAULT_ACCOUNT_NOT_FOUND",
                message=f"defaultAccount '{default_account}' 在 accounts 中未找到",
                suggestion="请检查 defaultAccount 配置是否与 accounts 中的账户名称一致",
            )
        )

    doc_owner_open_id = config.get("docOwnerOpenId", "")
    if doc_owner_open_id:
        warnings.append(
            SecurityWarning(
                level="info",
                code="FEISHU_DOC_OWNER_SET",
                message=f"文档所有者 open_id 已配置: {doc_owner_open_id[:8]}...",
                suggestion="确认该 open_id 对应的用户拥有文档管理权限",
            )
        )

    if not allowlist and group_policy == "allowlist":
        warnings.append(
            SecurityWarning(
                level="warning",
                code="FEISHU_ALLOWLIST_MAY_DEADLOCK",
                message="allowlist 为空 + groupPolicy=allowlist，所有群聊将被拒绝访问",
                suggestion="请添加至少一个群聊到 allowlist 或修改 groupPolicy",
            )
        )

    verify_token = config.get("verify_token", config.get("verifyToken", ""))
    encrypt_key = config.get("encrypt_key", config.get("encryptKey", ""))
    webhook_path = config.get("webhookPath", "")

    if webhook_path and not verify_token and not encrypt_key:
        warnings.append(
            SecurityWarning(
                level="critical",
                code="FEISHU_WEBHOOK_NO_VERIFICATION",
                message="Webhook 模式已启用但未配置 verifyToken 或 encryptKey，存在安全隐患",
                suggestion="请配置 verifyToken 或 encryptKey 以验证 Webhook 请求来源",
            )
        )

    if app_secret := (config.get("app_secret") or config.get("appSecret") or ""):
        if len(str(app_secret)) < 16:
            warnings.append(
                SecurityWarning(
                    level="warning",
                    code="FEISHU_APP_SECRET_TOO_SHORT",
                    message="appSecret 长度过短，可能存在安全风险",
                    suggestion="确认使用的 appSecret 是从飞书开发者后台直接获取的完整密钥",
                )
            )

    if isinstance(accounts, dict) and len(accounts) > 5:
        warnings.append(
            SecurityWarning(
                level="info",
                code="FEISHU_MANY_ACCOUNTS",
                message=f"配置了 {len(accounts)} 个账户，请确认所有账户都在使用中",
                suggestion="建议定期清理未使用的账户配置",
            )
        )

    reactions_enabled = config.get("reactionsEnabled", True)
    if not reactions_enabled:
        warnings.append(
            SecurityWarning(
                level="info",
                code="FEISHU_REACTIONS_DISABLED",
                message="消息反应功能已禁用",
                suggestion="启用反应功能可以改善用户体验，如需启用请设置 reactionsEnabled=True",
            )
        )

    tools_enabled_count = sum(
        1 for t in ("doc", "chat", "wiki", "drive", "perm") if config.get("tools", {}).get(t, True)
    )
    if tools_enabled_count >= 5:
        warnings.append(
            SecurityWarning(
                level="info",
                code="FEISHU_ALL_TOOLS_ENABLED",
                message=f"已启用 {tools_enabled_count} 个工具集成，请确保权限控制得当",
                suggestion="建议检查工具集成权限映射，避免给用户过高的文档/通讯录操作权限",
            )
        )

    return SecurityAuditResult(warnings=warnings)


def collect_feishu_security_warnings(config: dict[str, Any]) -> list[SecurityWarning]:
    result = audit_feishu_security(config)
    return result.warnings


def collect_feishu_security_audit_findings(config: dict[str, Any]) -> list[dict]:
    result = audit_feishu_security(config)
    findings: list[dict] = []
    for w in result.warnings:
        findings.append(
            {
                "level": w.level,
                "code": w.code,
                "message": w.message,
                "suggestion": w.suggestion,
            }
        )
    return findings