#!/usr/bin/env python3
"""
Advanced examples of Agent Provenance Chain usage.
"""

from apc import create_agent_chain
import json


def example_file_operations():
    """Example: Signing file operations."""
    print("Example 1: File Operations\n" + "=" * 50)
    
    chain = create_agent_chain("file-agent")
    
    # Sign a file read
    chain.sign_action(
        "file_read",
        {"path": "/etc/passwd", "bytes_read": 2048},
        {"reasoning": "Checking user accounts for security audit"}
    )
    
    # Sign a file write
    chain.sign_action(
        "file_write",
        {"path": "/var/log/agent.log", "bytes_written": 156},
        {"reasoning": "Logging operation results", "risk_level": "low"}
    )
    
    print(f"✅ Signed {len(chain.get_chain())} file operations\n")


def example_api_calls():
    """Example: Signing API interactions."""
    print("Example 2: API Calls\n" + "=" * 50)
    
    chain = create_agent_chain("api-agent")
    
    # External API call
    chain.sign_action(
        "api_call",
        {
            "url": "https://api.openai.com/v1/chat/completions",
            "method": "POST",
            "status": 200,
            "tokens_used": 1523
        },
        {
            "reasoning": "Generating response to user query",
            "data_sensitivity": "user_provided",
            "cost_usd": 0.03
        }
    )
    
    print(f"✅ Signed {len(chain.get_chain())} API calls\n")


def example_decision_making():
    """Example: Signing agent decisions."""
    print("Example 3: Decision Making\n" + "=" * 50)
    
    chain = create_agent_chain("decision-agent")
    
    # Complex decision with reasoning
    chain.sign_action(
        "decision",
        {
            "question": "Should I delete user data?",
            "answer": "no",
            "confidence": 0.95,
            "alternatives_considered": ["yes", "ask_user", "archive"]
        },
        {
            "reasoning": "Deletion requires explicit user consent per privacy policy",
            "policy_ref": "PRIVACY-001",
            "risk_level": "high"
        }
    )
    
    print(f"✅ Signed {len(chain.get_chain())} decisions\n")


def example_multi_agent():
    """Example: Multi-agent scenario."""
    print("Example 4: Multi-Agent Collaboration\n" + "=" * 50)
    
    agent_a = create_agent_chain("agent-a")
    agent_b = create_agent_chain("agent-b")
    
    # Agent A requests help
    agent_a.sign_action(
        "request_collaboration",
        {"target_agent": "agent-b", "task": "data_analysis"},
        {"reasoning": "Task too complex for solo operation"}
    )
    
    # Agent B accepts
    agent_b.sign_action(
        "accept_collaboration",
        {"requesting_agent": "agent-a", "task": "data_analysis"},
        {"reasoning": "Have spare capacity and required skills"}
    )
    
    # Agent B performs work
    agent_b.sign_action(
        "complete_task",
        {"task": "data_analysis", "result": "summary.json"},
        {"reasoning": "Analysis complete, returning results"}
    )
    
    # Agent A verifies
    agent_a.sign_action(
        "verify_result",
        {"from_agent": "agent-b", "verified": True},
        {"reasoning": "Results match expected format and quality"}
    )
    
    print(f"✅ Agent A: {len(agent_a.get_chain())} actions")
    print(f"✅ Agent B: {len(agent_b.get_chain())} actions")
    print("✅ Both chains independently verifiable\n")


def example_incident_investigation():
    """Example: Investigating an incident."""
    print("Example 5: Incident Investigation\n" + "=" * 50)
    
    chain = create_agent_chain("prod-agent")
    
    # Simulate an incident
    chain.sign_action(
        "exec",
        {"command": "rm /tmp/important.db", "exit_code": 0},
        {"reasoning": "Cleanup temporary files", "risk_level": "medium"}
    )
    
    # Later: investigate
    print("Investigating: Why was important.db deleted?")
    print()
    
    full_chain = chain.get_chain()
    for action in full_chain:
        if "important.db" in json.dumps(action):
            print(f"Found in action at {action['iso_time']}:")
            print(f"  Reasoning: {action['context'].get('reasoning')}")
            print(f"  Signed by: {action['agent']}")
            print(f"  Signature: {action['signature'][:32]}...")
            print()
            print("✅ Cryptographic proof of what happened and why\n")


if __name__ == "__main__":
    example_file_operations()
    example_api_calls()
    example_decision_making()
    example_multi_agent()
    example_incident_investigation()
    
    print("=" * 50)
    print("All examples demonstrate:")
    print("  • Cryptographic signing of actions")
    print("  • Context preservation (reasoning)")
    print("  • Independent verification")
    print("  • Audit trail for accountability")
    print("=" * 50)