deer-flow/backend/app/gateway/routers/skills.py

import json
import logging
from pathlib import Path

from fastapi import APIRouter, HTTPException
from pydantic import BaseModel, Field

from app.gateway.path_utils import resolve_thread_virtual_path
from deerflow.config.extensions_config import ExtensionsConfig, SkillStateConfig, get_extensions_config, reload_extensions_config
from deerflow.skills import Skill, load_skills
from deerflow.skills.installer import SkillAlreadyExistsError, install_skill_from_archive

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/api", tags=["skills"])


class SkillResponse(BaseModel):
    """Response model for skill information."""

    name: str = Field(..., description="Name of the skill")
    description: str = Field(..., description="Description of what the skill does")
    license: str | None = Field(None, description="License information")
    category: str = Field(..., description="Category of the skill (public or custom)")
    enabled: bool = Field(default=True, description="Whether this skill is enabled")


class SkillsListResponse(BaseModel):
    """Response model for listing all skills."""

    skills: list[SkillResponse]


class SkillUpdateRequest(BaseModel):
    """Request model for updating a skill."""

    enabled: bool = Field(..., description="Whether to enable or disable the skill")


class SkillInstallRequest(BaseModel):
    """Request model for installing a skill from a .skill file."""

    thread_id: str = Field(..., description="The thread ID where the .skill file is located")
    path: str = Field(..., description="Virtual path to the .skill file (e.g., mnt/user-data/outputs/my-skill.skill)")


class SkillInstallResponse(BaseModel):
    """Response model for skill installation."""

    success: bool = Field(..., description="Whether the installation was successful")
    skill_name: str = Field(..., description="Name of the installed skill")
    message: str = Field(..., description="Installation result message")


def _skill_to_response(skill: Skill) -> SkillResponse:
    """Convert a Skill object to a SkillResponse."""
    return SkillResponse(
        name=skill.name,
        description=skill.description,
        license=skill.license,
        category=skill.category,
        enabled=skill.enabled,
    )


@router.get(
    "/skills",
    response_model=SkillsListResponse,
    summary="List All Skills",
    description="Retrieve a list of all available skills from both public and custom directories.",
)
async def list_skills() -> SkillsListResponse:
    try:
        skills = load_skills(enabled_only=False)
        return SkillsListResponse(skills=[_skill_to_response(skill) for skill in skills])
    except Exception as e:
        logger.error(f"Failed to load skills: {e}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Failed to load skills: {str(e)}")


@router.get(
    "/skills/{skill_name}",
    response_model=SkillResponse,
    summary="Get Skill Details",
    description="Retrieve detailed information about a specific skill by its name.",
)
async def get_skill(skill_name: str) -> SkillResponse:
    try:
        skills = load_skills(enabled_only=False)
        skill = next((s for s in skills if s.name == skill_name), None)

        if skill is None:
            raise HTTPException(status_code=404, detail=f"Skill '{skill_name}' not found")

        return _skill_to_response(skill)
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Failed to get skill {skill_name}: {e}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Failed to get skill: {str(e)}")


@router.put(
    "/skills/{skill_name}",
    response_model=SkillResponse,
    summary="Update Skill",
    description="Update a skill's enabled status by modifying the extensions_config.json file.",
)
async def update_skill(skill_name: str, request: SkillUpdateRequest) -> SkillResponse:
    try:
        skills = load_skills(enabled_only=False)
        skill = next((s for s in skills if s.name == skill_name), None)

        if skill is None:
            raise HTTPException(status_code=404, detail=f"Skill '{skill_name}' not found")

        config_path = ExtensionsConfig.resolve_config_path()
        if config_path is None:
            config_path = Path.cwd().parent / "extensions_config.json"
            logger.info(f"No existing extensions config found. Creating new config at: {config_path}")

        extensions_config = get_extensions_config()
        extensions_config.skills[skill_name] = SkillStateConfig(enabled=request.enabled)

        config_data = {
            "mcpServers": {name: server.model_dump() for name, server in extensions_config.mcp_servers.items()},
            "skills": {name: {"enabled": skill_config.enabled} for name, skill_config in extensions_config.skills.items()},
        }

        with open(config_path, "w", encoding="utf-8") as f:
            json.dump(config_data, f, indent=2)

        logger.info(f"Skills configuration updated and saved to: {config_path}")
        reload_extensions_config()

        skills = load_skills(enabled_only=False)
        updated_skill = next((s for s in skills if s.name == skill_name), None)

        if updated_skill is None:
            raise HTTPException(status_code=500, detail=f"Failed to reload skill '{skill_name}' after update")

        logger.info(f"Skill '{skill_name}' enabled status updated to {request.enabled}")
        return _skill_to_response(updated_skill)

    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Failed to update skill {skill_name}: {e}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Failed to update skill: {str(e)}")


@router.post(
    "/skills/install",
    response_model=SkillInstallResponse,
    summary="Install Skill",
    description="Install a skill from a .skill file (ZIP archive) located in the thread's user-data directory.",
)
async def install_skill(request: SkillInstallRequest) -> SkillInstallResponse:
    try:
        skill_file_path = resolve_thread_virtual_path(request.thread_id, request.path)
        result = install_skill_from_archive(skill_file_path)
        return SkillInstallResponse(**result)
    except FileNotFoundError as e:
        raise HTTPException(status_code=404, detail=str(e))
    except SkillAlreadyExistsError as e:
        raise HTTPException(status_code=409, detail=str(e))
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Failed to install skill: {e}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Failed to install skill: {str(e)}")