#!/usr/bin/env python3
"""
DTO Jira Automation - Event-driven Jira ticket management
Listens to NATS events and automatically manages Jira tickets for Class-A runs
"""

import asyncio
import json
from typing import Dict, Any, Optional
from datetime import datetime

from nats.aio.client import Client as NATS
from jira_client import DTOJiraClient

class DTOJiraAutomation:
    def __init__(self, nats_servers: list = ["nats://localhost:4222"]):
        self.nats_servers = nats_servers
        self.nats_client = NATS()
        self.jira_client = DTOJiraClient()
        self.ticket_cache = {}  # run_id -> ticket_key mapping
        
    async def connect(self) -> bool:
        """Connect to NATS and Jira"""
        try:
            # Connect to NATS
            await self.nats_client.connect(servers=self.nats_servers)
            print("✅ Connected to NATS")
            
            # Test Jira connection
            if not self.jira_client.test_connection():
                print("⚠️ Jira not available - running in monitoring mode only")
            
            return True
            
        except Exception as e:
            print(f"❌ Connection failed: {e}")
            return False
    
    async def handle_run_planned(self, event_data: Dict[str, Any]):
        """Handle RUN_PLANNED event - create Jira ticket for Class-A runs"""
        run_id = event_data.get('run_id')
        data_class = event_data.get('data_class', '').upper()
        
        # Only create tickets for Class-A runs
        if data_class != 'CLASS_A':
            print(f"ℹ️ Skipping ticket creation for {data_class} run: {run_id}")
            return
        
        print(f"🎫 Creating Jira ticket for Class-A run: {run_id}")
        
        # Extract run data for ticket creation
        run_data = {
            'run_id': run_id,
            'manifest_path': event_data.get('manifest_path'),
            'data_size_bytes': event_data.get('data_size_bytes'),
            'initiated_by': event_data.get('initiated_by'),
            'environment': event_data.get('environment'),
            'estimated_duration': event_data.get('estimated_duration')
        }
        
        ticket_key = self.jira_client.create_class_a_ticket(run_data)
        
        if ticket_key:
            self.ticket_cache[run_id] = ticket_key
            print(f"✅ Created ticket {ticket_key} for run {run_id}")
        else:
            print(f"❌ Failed to create ticket for run {run_id}")
    
    async def handle_preflight_passed(self, event_data: Dict[str, Any]):
        """Handle PREFLIGHT_PASSED event - update ticket status"""
        run_id = event_data.get('run_id')
        ticket_key = self.ticket_cache.get(run_id)
        
        if not ticket_key:
            print(f"ℹ️ No ticket found for run: {run_id}")
            return
        
        comment = f"Pre-flight checks completed successfully for run {run_id}"
        self.jira_client.update_ticket_status(ticket_key, "in_progress", comment)
        print(f"✅ Updated ticket {ticket_key} - preflight passed")
    
    async def handle_preflight_failed(self, event_data: Dict[str, Any]):
        """Handle PREFLIGHT_FAILED event - mark ticket as failed"""
        run_id = event_data.get('run_id')
        ticket_key = self.ticket_cache.get(run_id)
        
        if not ticket_key:
            return
        
        error_details = event_data.get('error_details', 'Pre-flight validation failed')
        comment = f"Pre-flight checks failed for run {run_id}: {error_details}"
        
        self.jira_client.update_ticket_status(ticket_key, "failed", comment)
        print(f"❌ Updated ticket {ticket_key} - preflight failed")
    
    async def handle_transfer_started(self, event_data: Dict[str, Any]):
        """Handle TRANSFER_STARTED event - add progress comment"""
        run_id = event_data.get('run_id')
        ticket_key = self.ticket_cache.get(run_id)
        
        if not ticket_key:
            return
        
        transfer_method = event_data.get('transfer_method', 'unknown')
        source_host = event_data.get('source_host', 'unknown')
        target_host = event_data.get('target_host', 'unknown')
        
        comment = f"""
Data transfer started for run {run_id}:
• Method: {transfer_method}
• Source: {source_host}
• Target: {target_host}
• Started: {datetime.now().strftime('%Y-%m-%d %H:%M UTC')}
        """.strip()
        
        self.jira_client.update_ticket_status(ticket_key, "in_progress", comment)
        print(f"📊 Updated ticket {ticket_key} - transfer started")
    
    async def handle_slo_breach(self, event_data: Dict[str, Any]):
        """Handle SLO_BREACH event - add urgent comment"""
        run_id = event_data.get('run_id')
        ticket_key = self.ticket_cache.get(run_id)
        
        if not ticket_key:
            return
        
        sli_name = event_data.get('sli_name')
        expected_value = event_data.get('expected_value')
        actual_value = event_data.get('actual_value')
        breach_duration = event_data.get('breach_duration_seconds', 0)
        
        comment = f"""
🚨 SLO BREACH DETECTED for run {run_id}:
• SLI: {sli_name}
• Expected: {expected_value}
• Actual: {actual_value}
• Breach Duration: {breach_duration}s
• Timestamp: {datetime.now().strftime('%Y-%m-%d %H:%M UTC')}

Manual intervention may be required.
        """.strip()
        
        # Add comment without changing status
        response = self.jira_client.add_run_metrics(ticket_key, {
            'slo_breach': True,
            'breach_details': comment
        })
        
        print(f"🚨 Added SLO breach alert to ticket {ticket_key}")
    
    async def handle_run_completed(self, event_data: Dict[str, Any]):
        """Handle RUN_COMPLETED event - add metrics and close ticket"""
        run_id = event_data.get('run_id')
        ticket_key = self.ticket_cache.get(run_id)
        
        if not ticket_key:
            return
        
        # Extract performance metrics
        metrics = {
            'average_throughput_mbps': event_data.get('average_throughput_mbps'),
            'total_duration_seconds': event_data.get('total_duration_seconds'),
            'data_size_gb': event_data.get('data_size_bytes', 0) / (1024**3),
            'transfer_method': event_data.get('transfer_method'),
            'validation_passed': event_data.get('validation_passed'),
            'artifacts': event_data.get('artifacts', [])
        }
        
        # Add metrics as comment
        self.jira_client.add_run_metrics(ticket_key, metrics)
        
        # Update status based on success
        if event_data.get('final_status') == 'SUCCESS':
            self.jira_client.update_ticket_status(ticket_key, "completed",
                                                "Run completed successfully. All validations passed.")
            print(f"✅ Completed ticket {ticket_key} - run successful")
        else:
            self.jira_client.update_ticket_status(ticket_key, "failed",
                                                f"Run failed: {event_data.get('error_message', 'Unknown error')}")
            print(f"❌ Failed ticket {ticket_key} - run unsuccessful")
    
    async def handle_run_rolled_back(self, event_data: Dict[str, Any]):
        """Handle ROLLBACK_COMPLETED event - reopen ticket"""
        run_id = event_data.get('run_id')
        ticket_key = self.ticket_cache.get(run_id)
        
        if not ticket_key:
            return
        
        reason = event_data.get('rollback_reason', 'Manual rollback requested')
        comment = f"""
🔄 Rollback completed for run {run_id}:
• Reason: {reason}
• Rollback Time: {datetime.now().strftime('%Y-%m-%d %H:%M UTC')}
• Status: Data restored to previous state
        """.strip()
        
        self.jira_client.update_ticket_status(ticket_key, "rolled_back", comment)
        print(f"🔄 Reopened ticket {ticket_key} - rollback completed")
    
    async def process_event(self, msg):
        """Process incoming NATS event"""
        try:
            event_data = json.loads(msg.data.decode())
            event_type = event_data.get('event_type')
            
            # Route to appropriate handler
            handlers = {
                'RUN_PLANNED': self.handle_run_planned,
                'PREFLIGHT_PASSED': self.handle_preflight_passed,
                'PREFLIGHT_FAILED': self.handle_preflight_failed,
                'TRANSFER_STARTED': self.handle_transfer_started,
                'SLO_BREACH': self.handle_slo_breach,
                'RUN_COMPLETED': self.handle_run_completed,
                'ROLLBACK_COMPLETED': self.handle_run_rolled_back
            }
            
            handler = handlers.get(event_type)
            if handler:
                await handler(event_data)
            else:
                print(f"ℹ️ No handler for event type: {event_type}")
                
        except Exception as e:
            print(f"❌ Error processing event: {e}")
    
    async def start_automation(self):
        """Start listening for DTO events"""
        try:
            # Subscribe to DTO events
            await self.nats_client.subscribe("dto.events.>", cb=self.process_event)
            print("✅ Started Jira automation - listening for DTO events")
            
            # Keep running
            while True:
                await asyncio.sleep(1)
                
        except KeyboardInterrupt:
            print("\n🛑 Stopping Jira automation...")
        except Exception as e:
            print(f"❌ Automation error: {e}")
        finally:
            await self.nats_client.close()
    
    async def sync_existing_tickets(self):
        """Sync existing Jira tickets with run cache"""
        try:
            tickets = self.jira_client.get_class_a_tickets(status="In Progress")
            
            for ticket in tickets:
                run_id = ticket.get('run_id')
                if run_id:
                    self.ticket_cache[run_id] = ticket['key']
                    print(f"🔄 Synced ticket {ticket['key']} -> run {run_id}")
            
            print(f"✅ Synced {len(tickets)} existing tickets")
            
        except Exception as e:
            print(f"❌ Error syncing tickets: {e}")

# CLI entry point
async def main():
    automation = DTOJiraAutomation()
    
    if await automation.connect():
        print("🎫 DTO Jira Automation started")
        print("Monitoring events: RUN_PLANNED, PREFLIGHT_*, TRANSFER_STARTED, SLO_BREACH, RUN_COMPLETED, ROLLBACK_COMPLETED")
        print("Press Ctrl+C to stop\n")
        
        # Sync existing tickets
        await automation.sync_existing_tickets()
        
        # Start automation
        await automation.start_automation()
    else:
        print("❌ Failed to start automation")

if __name__ == "__main__":
    asyncio.run(main())