"""
AWS Bedrock Agents Security Checks Module

This module implements security validation for AWS Bedrock Agents, which are
autonomous AI systems that can execute actions in your AWS environment.

Priority: CRITICAL
Effort: 2-3 weeks
OWASP Coverage: LLM01 (Prompt Injection), LLM08 (Excessive Agency)
MITRE ATLAS: AML.T0051 (LLM Prompt Injection)

See ROADMAP.md Section 1.1 for complete implementation details.
"""

from typing import Dict, List, Optional
from ..enums import RiskLevel


class AgentSecurityChecks:
    """Security checks for AWS Bedrock Agents."""

    def __init__(self, checker):
        """
        Initialize agent security checks.

        Args:
            checker: Reference to main BedrockSecurityChecker instance
        """
        self.checker = checker
        self.bedrock = checker.bedrock
        self.bedrock_agent = checker.session.client('bedrock-agent')
        self.iam = checker.iam
        self.findings = []

    def check_agent_action_confirmation(self) -> List[Dict]:
        """
        Check if agents require confirmation for mutating operations.

        CRITICAL: Agents without requireConfirmation=ENABLED can execute
        dangerous actions without human approval.

        Returns:
            List of security findings

        TODO: Implement check for:
        - List all agents
        - For each action group, verify requireConfirmation is ENABLED
        - Flag agents with DISABLED or NONE confirmation
        - Risk Score: 9/10 if disabled for mutating operations
        """
        raise NotImplementedError("See ROADMAP.md Section 1.1.1")

    def check_agent_guardrails(self) -> List[Dict]:
        """
        Verify all agents have guardrails configured.

        Agents without guardrails are vulnerable to indirect prompt injection
        via their action group responses or knowledge base content.

        Returns:
            List of security findings

        TODO: Implement check for:
        - List all agents
        - Verify each has guardrailConfiguration set
        - Check guardrail strength (should be HIGH, not LOW)
        - Risk Score: 9/10 for no guardrails, 7/10 for weak guardrails
        """
        raise NotImplementedError("See ROADMAP.md Section 1.1.2")

    def check_agent_service_roles(self) -> List[Dict]:
        """
        Validate agent service role permissions follow least privilege.

        Returns:
            List of security findings

        TODO: Implement check for:
        - List all agents and their service roles
        - Analyze role policies for overly permissive actions
        - Flag wildcard permissions (bedrock:*, *)
        - Check for cross-account access risks
        - Risk Score: 8/10 for overly permissive roles
        """
        raise NotImplementedError("See ROADMAP.md Section 1.1.3")

    def check_agent_lambda_permissions(self) -> List[Dict]:
        """
        Validate Lambda functions used by action groups have proper permissions.

        Returns:
            List of security findings

        TODO: Implement check for:
        - List all agents and their action groups
        - For each Lambda function ARN, check IAM permissions
        - Verify Lambda resource-based policy restricts access
        - Check for environment variables containing secrets
        - Risk Score: 8/10 for overly permissive Lambda access
        """
        raise NotImplementedError("See ROADMAP.md Section 1.1.4")

    def check_agent_memory_encryption(self) -> List[Dict]:
        """
        Verify agent session memory uses customer-managed KMS keys.

        Returns:
            List of security findings

        TODO: Implement check for:
        - List all agents with memory persistence enabled
        - Check memoryConfiguration encryption settings
        - Flag agents using AWS-managed keys instead of customer keys
        - Risk Score: 7/10 for AWS-managed keys
        """
        raise NotImplementedError("See ROADMAP.md Section 1.1.5")

    def check_agent_knowledge_base_access(self) -> List[Dict]:
        """
        Validate agents have appropriate access to knowledge bases.

        Returns:
            List of security findings

        TODO: Implement check for:
        - List all agents and their knowledge base associations
        - Verify knowledge bases have proper access controls
        - Check for cross-account knowledge base access
        - Risk Score: 7/10 for inappropriate access patterns
        """
        raise NotImplementedError("See ROADMAP.md Section 1.1.6")

    def check_agent_tags(self) -> List[Dict]:
        """
        Validate agents have proper tagging for governance.

        Returns:
            List of security findings

        TODO: Implement check for:
        - List all agents and their tags
        - Check for required tags (Environment, Owner, DataClassification)
        - Flag untagged agents
        - Risk Score: 5/10 for missing tags
        """
        raise NotImplementedError("See ROADMAP.md Section 1.1.7")

    def check_agent_pii_in_names(self) -> List[Dict]:
        """
        Detect PII in agent names, descriptions, and instructions.

        Returns:
            List of security findings

        TODO: Implement check for:
        - List all agents
        - Scan name, description, instruction for PII patterns
        - Check for email addresses, phone numbers, AWS account IDs
        - Risk Score: 6/10 for PII exposure
        """
        raise NotImplementedError("See ROADMAP.md Section 1.1.8")

    def check_agent_prompt_injection_patterns(self) -> List[Dict]:
        """
        Scan agent instructions for known prompt injection vulnerabilities.

        Returns:
            List of security findings

        TODO: Implement check for:
        - List all agents and their instructions
        - Check for weak/missing system prompts
        - Scan for vulnerable instruction patterns
        - Validate input validation instructions present
        - Risk Score: 8/10 for vulnerable patterns
        """
        raise NotImplementedError("See ROADMAP.md Section 1.1.9")

    def check_agent_logging(self) -> List[Dict]:
        """
        Verify agent invocations are logged to CloudWatch.

        Returns:
            List of security findings

        TODO: Implement check for:
        - Verify CloudWatch log groups exist for agent invocations
        - Check log retention policies
        - Verify log encryption settings
        - Risk Score: 7/10 for missing logging
        """
        raise NotImplementedError("See ROADMAP.md Section 1.1.10")

    def run_all_checks(self) -> List[Dict]:
        """
        Run all agent security checks.

        Returns:
            List of all security findings
        """
        print("[CHECK] Running AWS Bedrock Agent security checks...")

        # TODO: Uncomment as each check is implemented
        # self.findings.extend(self.check_agent_action_confirmation())
        # self.findings.extend(self.check_agent_guardrails())
        # self.findings.extend(self.check_agent_service_roles())
        # self.findings.extend(self.check_agent_lambda_permissions())
        # self.findings.extend(self.check_agent_memory_encryption())
        # self.findings.extend(self.check_agent_knowledge_base_access())
        # self.findings.extend(self.check_agent_tags())
        # self.findings.extend(self.check_agent_pii_in_names())
        # self.findings.extend(self.check_agent_prompt_injection_patterns())
        # self.findings.extend(self.check_agent_logging())

        print(f"[INFO] Agent security checks: {len(self.findings)} findings")
        return self.findings
