#!/usr/bin/env python3
"""
Claude Hooks CLI - Command line interface for managing hooks
"""

import argparse
import json
import sys
from datetime import datetime
from pathlib import Path

from .backup_manager import BackupManager
from .session_state import SessionStateManager
from .shadow_learner import ShadowLearner
from .context_monitor import ContextMonitor


def list_backups():
    """List available backups"""
    backup_manager = BackupManager()
    backups = backup_manager.list_backups()
    
    if not backups:
        print("No backups found.")
        return
    
    print("Available Backups:")
    print("==================")
    
    for backup in backups:
        timestamp = backup.get("timestamp", "unknown")
        backup_id = backup.get("backup_id", "unknown")
        reason = backup.get("session_state", {}).get("backup_history", [])
        if reason:
            reason = reason[-1].get("reason", "unknown")
        else:
            reason = "unknown"
        
        print(f"🗂️  {backup_id}")
        print(f"   📅 {timestamp}")
        print(f"   📝 {reason}")
        print()


def show_session_status():
    """Show current session status"""
    session_manager = SessionStateManager()
    context_monitor = ContextMonitor()
    
    summary = session_manager.get_session_summary()
    context_summary = context_monitor.get_session_summary()
    
    print("Session Status:")
    print("===============")
    print(f"Session ID: {summary.get('session_id', 'unknown')}")
    print(f"Duration: {summary.get('session_stats', {}).get('duration_minutes', 0)} minutes")
    print(f"Context Usage: {context_summary.get('context_usage_ratio', 0):.1%}")
    print(f"Tool Calls: {summary.get('session_stats', {}).get('total_tool_calls', 0)}")
    print(f"Files Modified: {len(summary.get('modified_files', []))}")
    print(f"Commands Executed: {summary.get('session_stats', {}).get('total_commands', 0)}")
    print(f"Backups Created: {len(summary.get('backup_history', []))}")
    print()
    
    if summary.get('modified_files'):
        print("Modified Files:")
        for file_path in summary['modified_files']:
            print(f"  - {file_path}")
        print()
    
    if context_summary.get('should_backup'):
        print("⚠️  Backup recommended (high context usage)")
    else:
        print("✅ No backup needed currently")


def show_patterns():
    """Show learned patterns"""
    shadow_learner = ShadowLearner()
    
    print("Learned Patterns:")
    print("=================")
    
    # Command patterns
    command_patterns = shadow_learner.db.command_patterns
    if command_patterns:
        print("\n🖥️  Command Patterns:")
        for pattern_id, pattern in list(command_patterns.items())[:10]:  # Show top 10
            cmd = pattern.trigger.get("command", "unknown")
            confidence = pattern.confidence
            evidence = pattern.evidence_count
            success_rate = pattern.success_rate
            
            print(f"  {cmd}")
            print(f"    Confidence: {confidence:.1%}")
            print(f"    Evidence: {evidence} samples")
            print(f"    Success Rate: {success_rate:.1%}")
    
    # Context patterns  
    context_patterns = shadow_learner.db.context_patterns
    if context_patterns:
        print("\n🔍 Context Patterns:")
        for pattern_id, pattern in list(context_patterns.items())[:5]:  # Show top 5
            error_type = pattern.trigger.get("error_type", "unknown")
            confidence = pattern.confidence
            evidence = pattern.evidence_count
            
            print(f"  {error_type}")
            print(f"    Confidence: {confidence:.1%}")
            print(f"    Evidence: {evidence} samples")
    
    if not command_patterns and not context_patterns:
        print("No patterns learned yet. Use Claude Code to start building the knowledge base!")


def clear_patterns():
    """Clear learned patterns"""
    response = input("Are you sure you want to clear all learned patterns? (y/N): ")
    if response.lower() == 'y':
        shadow_learner = ShadowLearner()
        shadow_learner.db = shadow_learner._load_database()  # Reset to empty
        shadow_learner.save_database()
        print("✅ Patterns cleared successfully")
    else:
        print("Operation cancelled")


def export_data():
    """Export all hook data"""
    export_dir = Path("claude_hooks_export")
    export_dir.mkdir(exist_ok=True)
    
    # Export session state
    session_manager = SessionStateManager()
    summary = session_manager.get_session_summary()
    
    with open(export_dir / "session_data.json", 'w') as f:
        json.dump(summary, f, indent=2)
    
    # Export patterns
    shadow_learner = ShadowLearner()
    
    with open(export_dir / "patterns.json", 'w') as f:
        json.dump(shadow_learner.db.to_dict(), f, indent=2)
    
    # Export logs
    logs_dir = Path(".claude_hooks/logs")
    if logs_dir.exists():
        import shutil
        shutil.copytree(logs_dir, export_dir / "logs", dirs_exist_ok=True)
    
    print(f"✅ Data exported to {export_dir}")


def main():
    """Main CLI entry point"""
    parser = argparse.ArgumentParser(description="Claude Code Hooks CLI")
    
    subparsers = parser.add_subparsers(dest="command", help="Available commands")
    
    # List backups
    subparsers.add_parser("list-backups", help="List available backups")
    
    # Show session status
    subparsers.add_parser("status", help="Show current session status")
    
    # Show patterns
    subparsers.add_parser("patterns", help="Show learned patterns")
    
    # Clear patterns
    subparsers.add_parser("clear-patterns", help="Clear all learned patterns")
    
    # Export data
    subparsers.add_parser("export", help="Export all hook data")
    
    args = parser.parse_args()
    
    if not args.command:
        parser.print_help()
        return
    
    try:
        if args.command == "list-backups":
            list_backups()
        elif args.command == "status":
            show_session_status()
        elif args.command == "patterns":
            show_patterns()
        elif args.command == "clear-patterns":
            clear_patterns()
        elif args.command == "export":
            export_data()
        else:
            print(f"Unknown command: {args.command}")
            parser.print_help()
            
    except Exception as e:
        print(f"Error: {e}", file=sys.stderr)
        sys.exit(1)


if __name__ == "__main__":
    main()