"""
工具管理API
"""
from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.orm import Session
from typing import List, Optional
from app.core.database import get_db
from app.models.tool import Tool
from app.services.tool_registry import tool_registry
from app.api.auth import get_current_user
from app.models.user import User
from pydantic import BaseModel

router = APIRouter(prefix="/api/v1/tools", tags=["tools"])


class ToolCreate(BaseModel):
    """创建工具请求"""
    name: str
    description: str
    category: Optional[str] = None
    function_schema: dict
    implementation_type: str
    implementation_config: Optional[dict] = None
    is_public: bool = False


class ToolResponse(BaseModel):
    """工具响应"""
    id: str
    name: str
    description: str
    category: Optional[str]
    function_schema: dict
    implementation_type: str
    implementation_config: Optional[dict]
    is_public: bool
    use_count: int
    user_id: Optional[str]
    created_at: str
    updated_at: str
    
    class Config:
        from_attributes = True


@router.get("", response_model=List[ToolResponse])
async def list_tools(
    category: Optional[str] = Query(None, description="工具分类"),
    search: Optional[str] = Query(None, description="搜索关键词"),
    db: Session = Depends(get_db)
):
    """获取工具列表"""
    query = db.query(Tool).filter(Tool.is_public == True)
    
    if category:
        query = query.filter(Tool.category == category)
    
    if search:
        query = query.filter(
            Tool.name.contains(search) | 
            Tool.description.contains(search)
        )
    
    tools = query.order_by(Tool.use_count.desc(), Tool.created_at.desc()).all()
    return tools


@router.get("/builtin")
async def list_builtin_tools():
    """获取内置工具列表"""
    schemas = tool_registry.get_all_tool_schemas()
    return schemas


@router.get("/{tool_id}", response_model=ToolResponse)
async def get_tool(
    tool_id: str,
    db: Session = Depends(get_db)
):
    """获取工具详情"""
    tool = db.query(Tool).filter(Tool.id == tool_id).first()
    if not tool:
        raise HTTPException(status_code=404, detail="工具不存在")
    return tool


@router.post("", response_model=ToolResponse, status_code=201)
async def create_tool(
    tool_data: ToolCreate,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """创建工具"""
    # 检查工具名称是否已存在
    existing = db.query(Tool).filter(Tool.name == tool_data.name).first()
    if existing:
        raise HTTPException(status_code=400, detail=f"工具名称 '{tool_data.name}' 已存在")
    
    tool = Tool(
        name=tool_data.name,
        description=tool_data.description,
        category=tool_data.category,
        function_schema=tool_data.function_schema,
        implementation_type=tool_data.implementation_type,
        implementation_config=tool_data.implementation_config,
        is_public=tool_data.is_public,
        user_id=current_user.id
    )
    
    db.add(tool)
    db.commit()
    db.refresh(tool)
    
    return tool


@router.put("/{tool_id}", response_model=ToolResponse)
async def update_tool(
    tool_id: str,
    tool_data: ToolCreate,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """更新工具"""
    tool = db.query(Tool).filter(Tool.id == tool_id).first()
    if not tool:
        raise HTTPException(status_code=404, detail="工具不存在")
    
    # 检查权限（只有创建者可以更新）
    if tool.user_id != current_user.id:
        raise HTTPException(status_code=403, detail="无权更新此工具")
    
    # 检查名称冲突
    if tool_data.name != tool.name:
        existing = db.query(Tool).filter(Tool.name == tool_data.name).first()
        if existing:
            raise HTTPException(status_code=400, detail=f"工具名称 '{tool_data.name}' 已存在")
    
    tool.name = tool_data.name
    tool.description = tool_data.description
    tool.category = tool_data.category
    tool.function_schema = tool_data.function_schema
    tool.implementation_type = tool_data.implementation_type
    tool.implementation_config = tool_data.implementation_config
    tool.is_public = tool_data.is_public
    
    db.commit()
    db.refresh(tool)
    
    return tool


@router.delete("/{tool_id}", status_code=200)
async def delete_tool(
    tool_id: str,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """删除工具"""
    tool = db.query(Tool).filter(Tool.id == tool_id).first()
    if not tool:
        raise HTTPException(status_code=404, detail="工具不存在")
    
    # 检查权限（只有创建者可以删除）
    if tool.user_id != current_user.id:
        raise HTTPException(status_code=403, detail="无权删除此工具")
    
    # 内置工具不允许删除
    if tool.implementation_type == "builtin":
        raise HTTPException(status_code=400, detail="内置工具不允许删除")
    
    db.delete(tool)
    db.commit()
    
    return {"message": "工具已删除"}