"""Configuration renderer - orchestrates CLI generation"""
from typing import Dict, List, Any
from app.cli.generators import (
    generate_hostname_cli,
    generate_vlan_cli,
    generate_interface_cli,
    generate_routing_cli,
    generate_nat_cli,
    generate_acl_cli,
)


class ConfigRenderer:
    """
    Renders complete Cisco device configuration from config data.
    
    Design:
    - Deterministic output (always same order)
    - Idempotent when possible
    - Proper section formatting with "!" separators
    """
    
    # Command order (important for Cisco IOS)
    COMMAND_ORDER = [
        "hostname",
        "vlans",
        "interfaces",
        "routing",
        "nat",
        "acls",
    ]
    
    def __init__(self):
        self.cli_commands: List[str] = []
    
    def render(self, config_data: Dict[str, Any]) -> str:
        """
        Render full CLI configuration from config data dict.
        
        Args:
            config_data: Configuration dict with keys like:
                - hostname (str)
                - vlans (list)
                - interfaces (list)
                - routes (list)
                - nat (dict)
                - acls (list)
        
        Returns:
            Complete CLI as string
        """
        self.cli_commands = []
        
        # Process in order
        if "hostname" in config_data:
            self.cli_commands.extend(generate_hostname_cli(config_data["hostname"]))
            self.cli_commands.append("!")
        
        if "vlans" in config_data:
            self.cli_commands.extend(generate_vlan_cli(config_data["vlans"]))
        
        if "interfaces" in config_data:
            self.cli_commands.extend(generate_interface_cli(config_data["interfaces"]))
        
        if "routes" in config_data:
            self.cli_commands.extend(generate_routing_cli(config_data["routes"]))
            self.cli_commands.append("!")
        
        if "nat" in config_data:
            self.cli_commands.extend(generate_nat_cli(config_data["nat"]))
        
        if "acls" in config_data:
            self.cli_commands.extend(generate_acl_cli(config_data["acls"]))
        
        # Add final save prompt
        self.cli_commands.append("end")
        self.cli_commands.append("write memory")
        
        return "\n".join(self.cli_commands)
    
    def get_commands_list(self) -> List[str]:
        """Return CLI commands as list (for line-by-line execution)"""
        return self.cli_commands