"""
Day 2 Operations Provider for yamlforge
Supports cluster lifecycle management, upgrades, and operational automation
"""

import os

from typing import Dict, List
from ..base import BaseOpenShiftProvider


class Day2OperationsProvider(BaseOpenShiftProvider):
    """Provider for Day2 operations on OpenShift clusters"""
    
    def generate_day2_operations(self, yaml_data: Dict, clusters: List[Dict]) -> str:
        """Generate Day2 operations configuration"""
        
        day2_config = yaml_data.get('yamlforge', {}).get('day2_operations', {})
        if not day2_config:
            return ""
        
        terraform_config = '''
# =============================================================================
# DAY2 OPERATIONS CONFIGURATION
# =============================================================================

'''
        
        # Get cluster names from the clusters list
        cluster_names = [cluster.get('name', '') for cluster in clusters if cluster.get('name')]
        
        # Generate Day2 operations for each cluster
        for cluster_name in cluster_names:
            clean_cluster_name = self.clean_name(cluster_name)
            
            # Cluster upgrades
            upgrade_config = day2_config.get('cluster_upgrades', {})
            if upgrade_config:
                terraform_config += self._generate_cluster_upgrades(upgrade_config, cluster_name, clean_cluster_name)
            
            # Node management
            node_config = day2_config.get('node_management', {})
            if node_config:
                terraform_config += self._generate_node_management(node_config, cluster_name, clean_cluster_name)
            
            # Backup operations
            backup_config = day2_config.get('backup_operations', {})
            if backup_config:
                terraform_config += self._generate_backup_operations(backup_config, cluster_name, clean_cluster_name)
        
        return terraform_config
    
    def _generate_cluster_upgrades(self, upgrade_config: Dict, cluster_name: str, clean_cluster_name: str) -> str:
        """Generate cluster upgrade configurations"""
        
        # Get Red Hat API URL from environment variable
        default_upstream = os.getenv('REDHAT_OPENSHIFT_API_URL', 'https://api.openshift.com') + '/api/upgrades_info/v1/graph'
        
        return f'''
# Cluster Upgrade Configuration for {cluster_name}
resource "kubernetes_manifest" "cluster_upgrade_{clean_cluster_name}" {{
  provider = kubernetes.{clean_cluster_name}_admin
  
  manifest = {{
    apiVersion = "config.openshift.io/v1"
    kind       = "ClusterVersion"
    metadata = {{
      name = "version"
    }}
    spec = {{
      channel = "{upgrade_config.get('channel', 'stable-4.14')}"
      upstream = "{upgrade_config.get('upstream', default_upstream)}"
    }}
  }}
  
  depends_on = [kubernetes_service_account.{clean_cluster_name}_admin]
}}

'''
    
    def generate_lifecycle_management(self) -> str:
        """Generate cluster lifecycle management resources"""
        
        terraform_config = '''
# =============================================================================
# CLUSTER LIFECYCLE MANAGEMENT
# =============================================================================

# TODO: Implement cluster lifecycle management
# - Automated scaling policies
# - Health monitoring
# - Maintenance windows
# - Cluster hibernation/wake

'''
        
        return terraform_config
    
    def generate_blue_green_automation(self) -> str:
        """Generate blue/green deployment automation"""
        
        terraform_config = '''
# =============================================================================
# BLUE/GREEN DEPLOYMENT AUTOMATION
# =============================================================================

# TODO: Implement blue/green deployment automation
# - Traffic splitting
# - Canary deployments
# - Rollback strategies
# - Health checks

'''
        
        return terraform_config
    
    def generate_upgrade_automation(self) -> str:
        """Generate cluster upgrade automation"""
        
        terraform_config = '''
# =============================================================================
# CLUSTER UPGRADE AUTOMATION
# =============================================================================

# TODO: Implement cluster upgrade automation
# - Scheduled upgrades
# - Pre-upgrade validation
# - Progressive upgrades
# - Rollback procedures

'''
        
        return terraform_config 
