"""Node management commands for AITBC CLI"""

import click
from typing import Optional
from ..core.config import MultiChainConfig, load_multichain_config, get_default_node_config, add_node_config, remove_node_config
from ..core.node_client import NodeClient
from ..utils import output, error, success
import uuid

@click.group()
def node():
    """Node management commands"""
    pass

@node.command()
@click.argument('node_id')
@click.pass_context
def info(ctx, node_id):
    """Get detailed node information"""
    try:
        config = load_multichain_config()
        
        if node_id not in config.nodes:
            error(f"Node {node_id} not found in configuration")
            raise click.Abort()
        
        node_config = config.nodes[node_id]
        
        import asyncio
        
        async def get_node_info():
            async with NodeClient(node_config) as client:
                return await client.get_node_info()
        
        node_info = asyncio.run(get_node_info())
        
        # Basic node information
        basic_info = {
            "Node ID": node_info["node_id"],
            "Node Type": node_info["type"],
            "Status": node_info["status"],
            "Version": node_info["version"],
            "Uptime": f"{node_info['uptime_days']} days, {node_info['uptime_hours']} hours",
            "Endpoint": node_config.endpoint
        }
        
        output(basic_info, ctx.obj.get('output_format', 'table'), title=f"Node Information: {node_id}")
        
        # Performance metrics
        metrics = {
            "CPU Usage": f"{node_info['cpu_usage']}%",
            "Memory Usage": f"{node_info['memory_usage_mb']:.1f}MB",
            "Disk Usage": f"{node_info['disk_usage_mb']:.1f}MB",
            "Network In": f"{node_info['network_in_mb']:.1f}MB/s",
            "Network Out": f"{node_info['network_out_mb']:.1f}MB/s"
        }
        
        output(metrics, ctx.obj.get('output_format', 'table'), title="Performance Metrics")
        
        # Hosted chains
        if node_info.get("hosted_chains"):
            chains_data = [
                {
                    "Chain ID": chain_id,
                    "Type": chain.get("type", "unknown"),
                    "Status": chain.get("status", "unknown")
                }
                for chain_id, chain in node_info["hosted_chains"].items()
            ]
            
            output(chains_data, ctx.obj.get('output_format', 'table'), title="Hosted Chains")
        
    except Exception as e:
        error(f"Error getting node info: {str(e)}")
        raise click.Abort()

@node.command()
@click.option('--show-private', is_flag=True, help='Show private chains')
@click.option('--node-id', help='Specific node ID to query')
@click.pass_context
def chains(ctx, show_private, node_id):
    """List chains hosted on all nodes"""
    try:
        config = load_multichain_config()
        
        all_chains = []
        
        import asyncio
        
        async def get_all_chains():
            tasks = []
            for nid, node_config in config.nodes.items():
                if node_id and nid != node_id:
                    continue
                async def get_chains_for_node(nid, nconfig):
                    try:
                        async with NodeClient(nconfig) as client:
                            chains = await client.get_hosted_chains()
                            return [(nid, chain) for chain in chains]
                    except Exception as e:
                        print(f"Error getting chains from node {nid}: {e}")
                        return []
                
                tasks.append(get_chains_for_node(node_id, node_config))
            
            results = await asyncio.gather(*tasks)
            for result in results:
                all_chains.extend(result)
        
        asyncio.run(get_all_chains())
        
        if not all_chains:
            output("No chains found on any node", ctx.obj.get('output_format', 'table'))
            return
        
        # Filter private chains if not requested
        if not show_private:
            all_chains = [(node_id, chain) for node_id, chain in all_chains 
                         if chain.privacy.visibility != "private"]
        
        # Format output
        chains_data = [
            {
                "Node ID": node_id,
                "Chain ID": chain.id,
                "Type": chain.type.value,
                "Purpose": chain.purpose,
                "Name": chain.name,
                "Status": chain.status.value,
                "Block Height": chain.block_height,
                "Size": f"{chain.size_mb:.1f}MB"
            }
            for node_id, chain in all_chains
        ]
        
        output(chains_data, ctx.obj.get('output_format', 'table'), title="Chains by Node")
        
    except Exception as e:
        error(f"Error listing chains: {str(e)}")
        raise click.Abort()

@node.command()
@click.option('--format', type=click.Choice(['table', 'json']), default='table', help='Output format')
@click.pass_context
def list(ctx, format):
    """List all configured nodes"""
    try:
        config = load_multichain_config()
        
        if not config.nodes:
            output("No nodes configured", ctx.obj.get('output_format', 'table'))
            return
        
        nodes_data = [
            {
                "Node ID": node_id,
                "Endpoint": node_config.endpoint,
                "Timeout": f"{node_config.timeout}s",
                "Max Connections": node_config.max_connections,
                "Retry Count": node_config.retry_count
            }
            for node_id, node_config in config.nodes.items()
        ]
        
        output(nodes_data, ctx.obj.get('output_format', 'table'), title="Configured Nodes")
        
    except Exception as e:
        error(f"Error listing nodes: {str(e)}")
        raise click.Abort()

@node.command()
@click.argument('node_id')
@click.argument('endpoint')
@click.option('--timeout', default=30, help='Request timeout in seconds')
@click.option('--max-connections', default=10, help='Maximum concurrent connections')
@click.option('--retry-count', default=3, help='Number of retry attempts')
@click.pass_context
def add(ctx, node_id, endpoint, timeout, max_connections, retry_count):
    """Add a new node to configuration"""
    try:
        config = load_multichain_config()
        
        if node_id in config.nodes:
            error(f"Node {node_id} already exists")
            raise click.Abort()
        
        node_config = get_default_node_config()
        node_config.id = node_id
        node_config.endpoint = endpoint
        node_config.timeout = timeout
        node_config.max_connections = max_connections
        node_config.retry_count = retry_count
        
        config = add_node_config(config, node_config)
        
        from ..core.config import save_multichain_config
        save_multichain_config(config)
        
        success(f"Node {node_id} added successfully!")
        
        result = {
            "Node ID": node_id,
            "Endpoint": endpoint,
            "Timeout": f"{timeout}s",
            "Max Connections": max_connections,
            "Retry Count": retry_count
        }
        
        output(result, ctx.obj.get('output_format', 'table'))
        
    except Exception as e:
        error(f"Error adding node: {str(e)}")
        raise click.Abort()

@node.command()
@click.argument('node_id')
@click.option('--force', is_flag=True, help='Force removal without confirmation')
@click.pass_context
def remove(ctx, node_id, force):
    """Remove a node from configuration"""
    try:
        config = load_multichain_config()
        
        if node_id not in config.nodes:
            error(f"Node {node_id} not found")
            raise click.Abort()
        
        if not force:
            # Show node information before removal
            node_config = config.nodes[node_id]
            node_info = {
                "Node ID": node_id,
                "Endpoint": node_config.endpoint,
                "Timeout": f"{node_config.timeout}s",
                "Max Connections": node_config.max_connections
            }
            
            output(node_info, ctx.obj.get('output_format', 'table'), title="Node to Remove")
            
            if not click.confirm(f"Are you sure you want to remove node {node_id}?"):
                raise click.Abort()
        
        config = remove_node_config(config, node_id)
        
        from ..core.config import save_multichain_config
        save_multichain_config(config)
        
        success(f"Node {node_id} removed successfully!")
        
    except Exception as e:
        error(f"Error removing node: {str(e)}")
        raise click.Abort()

@node.command()
@click.argument('node_id')
@click.option('--realtime', is_flag=True, help='Real-time monitoring')
@click.option('--interval', default=5, help='Update interval in seconds')
@click.pass_context
def monitor(ctx, node_id, realtime, interval):
    """Monitor node activity"""
    try:
        config = load_multichain_config()
        
        if node_id not in config.nodes:
            error(f"Node {node_id} not found")
            raise click.Abort()
        
        node_config = config.nodes[node_id]
        
        import asyncio
        from rich.console import Console
        from rich.layout import Layout
        from rich.live import Live
        import time
        
        console = Console()
        
        async def get_node_stats():
            async with NodeClient(node_config) as client:
                node_info = await client.get_node_info()
                return node_info
        
        if realtime:
            # Real-time monitoring
            def generate_monitor_layout():
                try:
                    node_info = asyncio.run(get_node_stats())
                    
                    layout = Layout()
                    layout.split_column(
                        Layout(name="header", size=3),
                        Layout(name="metrics"),
                        Layout(name="chains", size=10)
                    )
                    
                    # Header
                    layout["header"].update(
                        f"Node Monitor: {node_id} - {node_info['status'].upper()}"
                    )
                    
                    # Metrics table
                    metrics_data = [
                        ["CPU Usage", f"{node_info['cpu_usage']}%"],
                        ["Memory Usage", f"{node_info['memory_usage_mb']:.1f}MB"],
                        ["Disk Usage", f"{node_info['disk_usage_mb']:.1f}MB"],
                        ["Network In", f"{node_info['network_in_mb']:.1f}MB/s"],
                        ["Network Out", f"{node_info['network_out_mb']:.1f}MB/s"],
                        ["Uptime", f"{node_info['uptime_days']}d {node_info['uptime_hours']}h"]
                    ]
                    
                    layout["metrics"].update(str(metrics_data))
                    
                    # Chains info
                    if node_info.get("hosted_chains"):
                        chains_text = f"Hosted Chains: {len(node_info['hosted_chains'])}\n"
                        for chain_id, chain in list(node_info["hosted_chains"].items())[:5]:
                            chains_text += f"  • {chain_id} ({chain.get('status', 'unknown')})\n"
                        layout["chains"].update(chains_text)
                    else:
                        layout["chains"].update("No chains hosted")
                    
                    return layout
                except Exception as e:
                    return f"Error getting node stats: {e}"
            
            with Live(generate_monitor_layout(), refresh_per_second=1) as live:
                try:
                    while True:
                        live.update(generate_monitor_layout())
                        time.sleep(interval)
                except KeyboardInterrupt:
                    console.print("\n[yellow]Monitoring stopped by user[/yellow]")
        else:
            # Single snapshot
            node_info = asyncio.run(get_node_stats())
            
            stats_data = [
                {
                    "Metric": "CPU Usage",
                    "Value": f"{node_info['cpu_usage']}%"
                },
                {
                    "Metric": "Memory Usage",
                    "Value": f"{node_info['memory_usage_mb']:.1f}MB"
                },
                {
                    "Metric": "Disk Usage",
                    "Value": f"{node_info['disk_usage_mb']:.1f}MB"
                },
                {
                    "Metric": "Network In",
                    "Value": f"{node_info['network_in_mb']:.1f}MB/s"
                },
                {
                    "Metric": "Network Out",
                    "Value": f"{node_info['network_out_mb']:.1f}MB/s"
                },
                {
                    "Metric": "Uptime",
                    "Value": f"{node_info['uptime_days']}d {node_info['uptime_hours']}h"
                }
            ]
            
            output(stats_data, ctx.obj.get('output_format', 'table'), title=f"Node Statistics: {node_id}")
        
    except Exception as e:
        error(f"Error during monitoring: {str(e)}")
        raise click.Abort()

@node.command()
@click.argument('node_id')
@click.pass_context
def test(ctx, node_id):
    """Test connectivity to a node"""
    try:
        config = load_multichain_config()
        
        if node_id not in config.nodes:
            error(f"Node {node_id} not found")
            raise click.Abort()
        
        node_config = config.nodes[node_id]
        
        import asyncio
        
        async def test_node():
            try:
                async with NodeClient(node_config) as client:
                    node_info = await client.get_node_info()
                    chains = await client.get_hosted_chains()
                    
                    return {
                        "connected": True,
                        "node_id": node_info["node_id"],
                        "status": node_info["status"],
                        "version": node_info["version"],
                        "chains_count": len(chains)
                    }
            except Exception as e:
                return {
                    "connected": False,
                    "error": str(e)
                }
        
        result = asyncio.run(test_node())
        
        if result["connected"]:
            success(f"Successfully connected to node {node_id}!")
            
            test_data = [
                {
                    "Test": "Connection",
                    "Status": "✓ Pass"
                },
                {
                    "Test": "Node ID",
                    "Status": result["node_id"]
                },
                {
                    "Test": "Status",
                    "Status": result["status"]
                },
                {
                    "Test": "Version",
                    "Status": result["version"]
                },
                {
                    "Test": "Chains",
                    "Status": f"{result['chains_count']} hosted"
                }
            ]
            
            output(test_data, ctx.obj.get('output_format', 'table'), title=f"Node Test Results: {node_id}")
        else:
            error(f"Failed to connect to node {node_id}: {result['error']}")
            raise click.Abort()
        
    except Exception as e:
        error(f"Error testing node: {str(e)}")
        raise click.Abort()

# Island management commands
@node.group()
def island():
    """Island management commands for federated mesh"""
    pass

@island.command()
@click.option('--island-id', help='Island ID (UUID), generates new if not provided')
@click.option('--island-name', default='default', help='Human-readable island name')
@click.option('--chain-id', help='Chain ID for this island')
@click.pass_context
def create(ctx, island_id, island_name, chain_id):
    """Create a new island"""
    try:
        if not island_id:
            island_id = str(uuid.uuid4())
        
        if not chain_id:
            chain_id = f"ait-{island_id[:8]}"
        
        island_info = {
            "Island ID": island_id,
            "Island Name": island_name,
            "Chain ID": chain_id,
            "Created": "Now"
        }
        
        output(island_info, ctx.obj.get('output_format', 'table'), title="New Island Created")
        success(f"Island {island_name} ({island_id}) created successfully")
        
        # Note: In a real implementation, this would update the configuration
        # and notify the island manager
        
    except Exception as e:
        error(f"Error creating island: {str(e)}")
        raise click.Abort()

@island.command()
@click.argument('island_id')
@click.argument('island_name')
@click.argument('chain_id')
@click.option('--is-hub', is_flag=True, help='Register this node as a hub for the island')
@click.pass_context
def join(ctx, island_id, island_name, chain_id, is_hub):
    """Join an existing island"""
    try:
        join_info = {
            "Island ID": island_id,
            "Island Name": island_name,
            "Chain ID": chain_id,
            "As Hub": is_hub
        }
        
        output(join_info, ctx.obj.get('output_format', 'table'), title=f"Joining Island: {island_name}")
        success(f"Successfully joined island {island_name}")
        
        # Note: In a real implementation, this would update the island manager
        
    except Exception as e:
        error(f"Error joining island: {str(e)}")
        raise click.Abort()

@island.command()
@click.argument('island_id')
@click.pass_context
def leave(ctx, island_id):
    """Leave an island"""
    try:
        success(f"Successfully left island {island_id}")
        
        # Note: In a real implementation, this would update the island manager
        
    except Exception as e:
        error(f"Error leaving island: {str(e)}")
        raise click.Abort()

@island.command()
@click.pass_context
def list(ctx):
    """List all known islands"""
    try:
        # Note: In a real implementation, this would query the island manager
        islands = [
            {
                "Island ID": "550e8400-e29b-41d4-a716-446655440000",
                "Island Name": "default",
                "Chain ID": "ait-island-default",
                "Status": "Active",
                "Peer Count": "3"
            }
        ]
        
        output(islands, ctx.obj.get('output_format', 'table'), title="Known Islands")
        
    except Exception as e:
        error(f"Error listing islands: {str(e)}")
        raise click.Abort()

@island.command()
@click.argument('island_id')
@click.pass_context
def info(ctx, island_id):
    """Show information about a specific island"""
    try:
        # Note: In a real implementation, this would query the island manager
        island_info = {
            "Island ID": island_id,
            "Island Name": "default",
            "Chain ID": "ait-island-default",
            "Status": "Active",
            "Peer Count": "3",
            "Hub Count": "1"
        }
        
        output(island_info, ctx.obj.get('output_format', 'table'), title=f"Island Information: {island_id}")
        
    except Exception as e:
        error(f"Error getting island info: {str(e)}")
        raise click.Abort()

# Hub management commands
@node.group()
def hub():
    """Hub management commands for federated mesh"""
    pass

@hub.command()
@click.option('--public-address', help='Public IP address')
@click.option('--public-port', type=int, help='Public port')
@click.pass_context
def register(ctx, public_address, public_port):
    """Register this node as a hub"""
    try:
        hub_info = {
            "Node ID": "local-node",
            "Status": "Registered",
            "Public Address": public_address or "auto-discovered",
            "Public Port": public_port or "auto-discovered"
        }
        
        output(hub_info, ctx.obj.get('output_format', 'table'), title="Hub Registration")
        success("Successfully registered as hub")
        
        # Note: In a real implementation, this would update the hub manager
        
    except Exception as e:
        error(f"Error registering as hub: {str(e)}")
        raise click.Abort()

@hub.command()
@click.pass_context
def unregister(ctx):
    """Unregister this node as a hub"""
    try:
        success("Successfully unregistered as hub")
        
        # Note: In a real implementation, this would update the hub manager
        
    except Exception as e:
        error(f"Error unregistering as hub: {str(e)}")
        raise click.Abort()

@hub.command()
@click.pass_context
def list(ctx):
    """List known hubs"""
    try:
        # Note: In a real implementation, this would query the hub manager
        hubs = [
            {
                "Node ID": "hub-node-1",
                "Address": "10.1.1.1",
                "Port": 7070,
                "Island ID": "550e8400-e29b-41d4-a716-446655440000",
                "Peer Count": "5"
            }
        ]
        
        output(hubs, ctx.obj.get('output_format', 'table'), title="Known Hubs")
        
    except Exception as e:
        error(f"Error listing hubs: {str(e)}")
        raise click.Abort()

# Bridge management commands
@node.group()
def bridge():
    """Bridge management commands for federated mesh"""
    pass

@bridge.command()
@click.argument('target_island_id')
@click.pass_context
def request(ctx, target_island_id):
    """Request a bridge to another island"""
    try:
        success(f"Bridge request sent to island {target_island_id}")
        
        # Note: In a real implementation, this would use the bridge manager
        
    except Exception as e:
        error(f"Error requesting bridge: {str(e)}")
        raise click.Abort()

@bridge.command()
@click.argument('request_id')
@click.argument('approving_node_id')
@click.pass_context
def approve(ctx, request_id, approving_node_id):
    """Approve a bridge request"""
    try:
        success(f"Bridge request {request_id} approved")
        
        # Note: In a real implementation, this would use the bridge manager
        
    except Exception as e:
        error(f"Error approving bridge request: {str(e)}")
        raise click.Abort()

@bridge.command()
@click.argument('request_id')
@click.option('--reason', help='Rejection reason')
@click.pass_context
def reject(ctx, request_id, reason):
    """Reject a bridge request"""
    try:
        success(f"Bridge request {request_id} rejected")
        
        # Note: In a real implementation, this would use the bridge manager
        
    except Exception as e:
        error(f"Error rejecting bridge request: {str(e)}")
        raise click.Abort()

@bridge.command()
@click.pass_context
def list(ctx):
    """List bridge connections"""
    try:
        # Note: In a real implementation, this would query the bridge manager
        bridges = [
            {
                "Bridge ID": "bridge-1",
                "Source Island": "island-a",
                "Target Island": "island-b",
                "Status": "Active"
            }
        ]
        
        output(bridges, ctx.obj.get('output_format', 'table'), title="Bridge Connections")
        
    except Exception as e:
        error(f"Error listing bridges: {str(e)}")
        raise click.Abort()

# Multi-chain management commands
@node.group()
def chain():
    """Multi-chain management commands for parallel chains"""
    pass

@chain.command()
@click.argument('chain_id')
@click.option('--chain-type', type=click.Choice(['bilateral', 'micro']), default='micro', help='Chain type')
@click.pass_context
def start(ctx, chain_id, chain_type):
    """Start a new parallel chain instance"""
    try:
        chain_info = {
            "Chain ID": chain_id,
            "Chain Type": chain_type,
            "Status": "Starting",
            "RPC Port": "auto-allocated",
            "P2P Port": "auto-allocated"
        }
        
        output(chain_info, ctx.obj.get('output_format', 'table'), title=f"Starting Chain: {chain_id}")
        success(f"Chain {chain_id} started successfully")
        
        # Note: In a real implementation, this would use the multi-chain manager
        
    except Exception as e:
        error(f"Error starting chain: {str(e)}")
        raise click.Abort()

@chain.command()
@click.argument('chain_id')
@click.pass_context
def stop(ctx, chain_id):
    """Stop a parallel chain instance"""
    try:
        success(f"Chain {chain_id} stopped successfully")
        
        # Note: In a real implementation, this would use the multi-chain manager
        
    except Exception as e:
        error(f"Error stopping chain: {str(e)}")
        raise click.Abort()

@chain.command()
@click.pass_context
def list(ctx):
    """List all active chain instances"""
    try:
        # Note: In a real implementation, this would query the multi-chain manager
        chains = [
            {
                "Chain ID": "ait-mainnet",
                "Chain Type": "default",
                "Status": "Running",
                "RPC Port": 8000,
                "P2P Port": 7070
            }
        ]
        
        output(chains, ctx.obj.get('output_format', 'table'), title="Active Chains")
        
    except Exception as e:
        error(f"Error listing chains: {str(e)}")
        raise click.Abort()