import json
import base64
from datetime import datetime
from typing import Optional, Dict, Any
from fastapi import APIRouter, HTTPException, Depends, Request, Body

from core.utils.auth_utils import verify_and_get_user_id_from_jwt
from core.utils.logger import logger
from core.sandbox.sandbox import get_or_start_sandbox
from core.services.supabase import DBConnection
from core.agentpress.thread_manager import ThreadManager

from . import core_utils as utils
from .core_utils import _get_version_service

router = APIRouter(tags=["agent-tools"])

@router.get("/agents/{agent_id}/custom-mcp-tools", summary="Get Agent Custom MCP Tools", operation_id="get_agent_custom_mcp_tools")
async def get_custom_mcp_tools_for_agent(
    agent_id: str,
    request: Request,
    user_id: str = Depends(verify_and_get_user_id_from_jwt)
):
    logger.debug(f"Getting custom MCP tools for agent {agent_id}, user {user_id}")
    try:
        client = await utils.db.client
        agent_result = await client.table('agents').select('current_version_id').eq('agent_id', agent_id).eq('account_id', user_id).execute()
        if not agent_result.data:
            raise HTTPException(status_code=404, detail="Agent not found")
        
        agent = agent_result.data[0]
 
        agent_config = {}
        if agent.get('current_version_id'):
            version_result = await client.table('agent_versions')\
                .select('config')\
                .eq('version_id', agent['current_version_id'])\
                .maybe_single()\
                .execute()
            if version_result.data and version_result.data.get('config'):
                agent_config = version_result.data['config']
        
        tools = agent_config.get('tools', {})
        custom_mcps = tools.get('custom_mcp', [])
        
        mcp_url = request.headers.get('X-MCP-URL')
        mcp_type = request.headers.get('X-MCP-Type', 'sse')
        
        if not mcp_url:
            raise HTTPException(status_code=400, detail="X-MCP-URL header is required")
        
        mcp_config = {
            'url': mcp_url,
            'type': mcp_type
        }
        
        if 'X-MCP-Headers' in request.headers:
            import json
            try:
                mcp_config['headers'] = json.loads(request.headers['X-MCP-Headers'])
            except json.JSONDecodeError:
                logger.warning("Failed to parse X-MCP-Headers as JSON")
        
        from core.mcp_module import mcp_service
        discovery_result = await mcp_service.discover_custom_tools(mcp_type, mcp_config)
        
        existing_mcp = None
        for mcp in custom_mcps:
            if mcp_type == 'composio':
                if (mcp.get('type') == 'composio' and 
                    mcp.get('config', {}).get('profile_id') == mcp_url):
                    existing_mcp = mcp
                    break
            else:
                if (mcp.get('customType') == mcp_type and 
                    mcp.get('config', {}).get('url') == mcp_url):
                    existing_mcp = mcp
                    break
        
        tools = []
        enabled_tools = existing_mcp.get('enabledTools', []) if existing_mcp else []
        
        for tool in discovery_result.tools:
            tools.append({
                'name': tool['name'],
                'description': tool.get('description', f'Tool from {mcp_type.upper()} MCP server'),
                'enabled': tool['name'] in enabled_tools
            })
        
        return {
            'tools': tools,
            'has_mcp_config': existing_mcp is not None,
            'server_type': mcp_type,
            'server_url': mcp_url
        }
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error getting custom MCP tools for agent {agent_id}: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")

@router.post("/agents/{agent_id}/custom-mcp-tools", summary="Update Agent Custom MCP Tools", operation_id="update_agent_custom_mcp_tools")
async def update_custom_mcp_tools_for_agent(
    agent_id: str,
    request: dict,
    user_id: str = Depends(verify_and_get_user_id_from_jwt)
):
    logger.debug(f"Updating custom MCP tools for agent {agent_id}, user {user_id}")
    
    try:
        client = await utils.db.client
        
        agent_result = await client.table('agents').select('current_version_id').eq('agent_id', agent_id).eq('account_id', user_id).execute()
        if not agent_result.data:
            raise HTTPException(status_code=404, detail="Agent not found")
        
        agent = agent_result.data[0]
        
        agent_config = {}
        if agent.get('current_version_id'):
            version_result = await client.table('agent_versions')\
                .select('config')\
                .eq('version_id', agent['current_version_id'])\
                .maybe_single()\
                .execute()
            if version_result.data and version_result.data.get('config'):
                agent_config = version_result.data['config']
        
        tools = agent_config.get('tools', {})
        custom_mcps = tools.get('custom_mcp', [])
        
        mcp_url = request.get('url')
        mcp_type = request.get('type', 'sse')
        enabled_tools = request.get('enabled_tools', [])
        
        if not mcp_url:
            raise HTTPException(status_code=400, detail="MCP URL is required")
        
        updated = False
        for i, mcp in enumerate(custom_mcps):
            if mcp_type == 'composio':
                # For Composio, match by profile_id
                if (mcp.get('type') == 'composio' and 
                    mcp.get('config', {}).get('profile_id') == mcp_url):
                    custom_mcps[i]['enabledTools'] = enabled_tools
                    updated = True
                    break
            else:
                if (mcp.get('customType') == mcp_type and 
                    mcp.get('config', {}).get('url') == mcp_url):
                    custom_mcps[i]['enabledTools'] = enabled_tools
                    updated = True
                    break
        
        if not updated:
            if mcp_type == 'composio':
                try:
                    from core.composio_integration.composio_profile_service import ComposioProfileService
                    from core.services.supabase import DBConnection
                    profile_service = ComposioProfileService(DBConnection())
 
                    profile_id = mcp_url
                    mcp_config = await profile_service.get_mcp_config_for_agent(profile_id)
                    mcp_config['enabledTools'] = enabled_tools
                    custom_mcps.append(mcp_config)
                except Exception as e:
                    logger.error(f"Failed to get Composio profile config: {e}")
                    raise HTTPException(status_code=400, detail=f"Failed to get Composio profile: {str(e)}")
            else:
                new_mcp_config = {
                    "name": f"Custom MCP ({mcp_type.upper()})",
                    "customType": mcp_type,
                    "type": mcp_type,
                    "config": {
                        "url": mcp_url
                    },
                    "enabledTools": enabled_tools
                }
                custom_mcps.append(new_mcp_config)
        
        tools['custom_mcp'] = custom_mcps
        agent_config['tools'] = tools
        
        from .versioning.version_service import get_version_service
        try:
            version_service = await get_version_service() 
            new_version = await version_service.create_version(
                agent_id=agent_id,
                user_id=user_id,
                system_prompt=agent_config.get('system_prompt', ''),
                configured_mcps=agent_config.get('tools', {}).get('mcp', []),
                custom_mcps=custom_mcps,
                agentpress_tools=agent_config.get('tools', {}).get('agentpress', {}),
                change_description=f"Updated custom MCP tools for {mcp_type}"
            )
            logger.debug(f"Created version {new_version.version_id} for custom MCP tools update on agent {agent_id}")
        except Exception as e:
            logger.error(f"Failed to create version for custom MCP tools update: {e}")
            raise HTTPException(status_code=500, detail="Failed to save changes")
        
        return {
            'success': True,
            'enabled_tools': enabled_tools,
            'total_tools': len(enabled_tools)
        }
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error updating custom MCP tools for agent {agent_id}: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")

@router.put("/agents/{agent_id}/custom-mcp-tools", summary="Update Agent Custom MCPs", operation_id="update_agent_custom_mcps")
async def update_agent_custom_mcps(
    agent_id: str,
    request: dict,
    user_id: str = Depends(verify_and_get_user_id_from_jwt)
):
    logger.debug(f"Updating agent {agent_id} custom MCPs for user {user_id}")
    
    try:
        client = await utils.db.client
        agent_result = await client.table('agents').select('current_version_id').eq('agent_id', agent_id).eq('account_id', user_id).execute()
        if not agent_result.data:
            raise HTTPException(status_code=404, detail="Agent not found")
        
        agent = agent_result.data[0]
        
        agent_config = {}
        if agent.get('current_version_id'):
            version_result = await client.table('agent_versions')\
                .select('config')\
                .eq('version_id', agent['current_version_id'])\
                .maybe_single()\
                .execute()
            if version_result.data and version_result.data.get('config'):
                agent_config = version_result.data['config']
        
        new_custom_mcps = request.get('custom_mcps', [])
        if not new_custom_mcps:
            raise HTTPException(status_code=400, detail="custom_mcps array is required")
        
        tools = agent_config.get('tools', {})
        existing_custom_mcps = tools.get('custom_mcp', [])
        
        updated = False
        for new_mcp in new_custom_mcps:
            mcp_type = new_mcp.get('type', '')
            
            if mcp_type == 'composio':
                profile_id = new_mcp.get('config', {}).get('profile_id')
                if not profile_id:
                    continue
                    
                for i, existing_mcp in enumerate(existing_custom_mcps):
                    if (existing_mcp.get('type') == 'composio' and 
                        existing_mcp.get('config', {}).get('profile_id') == profile_id):
                        existing_custom_mcps[i] = new_mcp
                        updated = True
                        break
                
                if not updated:
                    existing_custom_mcps.append(new_mcp)
                    updated = True
            else:
                mcp_url = new_mcp.get('config', {}).get('url')
                mcp_name = new_mcp.get('name', '')
                
                for i, existing_mcp in enumerate(existing_custom_mcps):
                    if (existing_mcp.get('config', {}).get('url') == mcp_url or 
                        (mcp_name and existing_mcp.get('name') == mcp_name)):
                        existing_custom_mcps[i] = new_mcp
                        updated = True
                        break
                
                if not updated:
                    existing_custom_mcps.append(new_mcp)
                    updated = True
        
        tools['custom_mcp'] = existing_custom_mcps
        agent_config['tools'] = tools
        
        from .versioning.version_service import get_version_service
        import datetime
        
        try:
            version_service = await get_version_service()
            timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
            change_description = f"MCP tools update {timestamp}"
            
            new_version = await version_service.create_version(
                agent_id=agent_id,
                user_id=user_id,
                system_prompt=agent_config.get('system_prompt', ''),
                configured_mcps=agent_config.get('tools', {}).get('mcp', []),
                custom_mcps=existing_custom_mcps,
                agentpress_tools=agent_config.get('tools', {}).get('agentpress', {}),
                change_description=change_description
            )
            logger.debug(f"Created version {new_version.version_id} for agent {agent_id}")
            
            total_enabled_tools = sum(len(mcp.get('enabledTools', [])) for mcp in new_custom_mcps)
        except Exception as e:
            logger.error(f"Failed to create version for custom MCP tools update: {e}")
            raise HTTPException(status_code=500, detail="Failed to save changes")
        
        return {
            'success': True,
            'data': {
                'custom_mcps': existing_custom_mcps,
                'total_enabled_tools': total_enabled_tools
            }
        }
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error updating agent custom MCPs: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")

@router.get("/agents/{agent_id}/tools", summary="Get Agent Tools", operation_id="get_agent_tools")
async def get_agent_tools(
    agent_id: str,
    user_id: str = Depends(verify_and_get_user_id_from_jwt)
):
        
    logger.debug(f"Fetching enabled tools for agent: {agent_id} by user: {user_id}")
    client = await utils.db.client

    agent_result = await client.table('agents').select('*').eq('agent_id', agent_id).execute()
    if not agent_result.data:
        raise HTTPException(status_code=404, detail="Agent not found")
    agent = agent_result.data[0]
    if agent['account_id'] != user_id and not agent.get('is_public', False):
        raise HTTPException(status_code=403, detail="Access denied")

    version_data = None
    if agent.get('current_version_id'):
        try:
            version_service = await _get_version_service()

            version_obj = await version_service.get_version(
                agent_id=agent_id,
                version_id=agent['current_version_id'],
                user_id=user_id
            )
            version_data = version_obj.to_dict()
        except Exception as e:
            logger.warning(f"Failed to fetch version data for tools endpoint: {e}")
    
    from .config_helper import extract_agent_config
    agent_config = extract_agent_config(agent, version_data)
    
    agentpress_tools_config = agent_config['agentpress_tools']
    configured_mcps = agent_config['configured_mcps'] 
    custom_mcps = agent_config['custom_mcps']

    agentpress_tools = []
    for name, enabled in agentpress_tools_config.items():
        is_enabled_tool = bool(enabled.get('enabled', False)) if isinstance(enabled, dict) else bool(enabled)
        agentpress_tools.append({"name": name, "enabled": is_enabled_tool})

    mcp_tools = []
    for mcp in configured_mcps + custom_mcps:
        server = mcp.get('name')
        enabled_tools = mcp.get('enabledTools') or mcp.get('enabled_tools') or []
        for tool_name in enabled_tools:
            mcp_tools.append({"name": tool_name, "server": server, "enabled": True})
    return {"agentpress_tools": agentpress_tools, "mcp_tools": mcp_tools}