from fastapi import APIRouter, Depends, HTTPException
from typing import Optional, List
from pydantic import BaseModel
from model.response import StandardResponse
from db.session import get_db
from sqlalchemy.orm import Session

from service.kg_node_service import KGNodeService
from service.trunks_service import TrunksService
from service.kg_edge_service import KGEdgeService
from service.kg_prop_service import KGPropService
import logging

router = APIRouter(prefix="/saas", tags=["SaaS Knowledge Base"])

logger = logging.getLogger(__name__)

class PaginatedSearchRequest(BaseModel):
    keyword: Optional[str] = None
    pageNo: int = 1
    limit: int = 10
    knowledge_ids: Optional[List[str]] = None

class NodePaginatedSearchRequest(BaseModel):
    name: str
    category: Optional[str] = None
    pageNo: int = 1
    limit: int = 10  

class NodeCreateRequest(BaseModel):
    name: str
    category: str
    layout: Optional[str] = None
    version: Optional[str] = None
    embedding: Optional[List[float]] = None

class NodeUpdateRequest(BaseModel):
    layout: Optional[str] = None
    version: Optional[str] = None
    status: Optional[int] = None
    embedding: Optional[List[float]] = None

class VectorSearchRequest(BaseModel):
    text: str
    limit: int = 10
    type: Optional[str] = None

class NodeRelationshipRequest(BaseModel):
    src_id: int

@router.post("/nodes/paginated_search2", response_model=StandardResponse)
async def paginated_search(
    payload: PaginatedSearchRequest,
    db: Session = Depends(get_db)
):
    try:
        service = KGNodeService(db)
        search_params = {
            'keyword': payload.keyword,
            'pageNo': payload.pageNo,
            'limit': payload.limit,
            'knowledge_ids': payload.knowledge_ids,
            'load_props': True
        }
        result = service.paginated_search(search_params)
        return StandardResponse(
            success=True,
            data={
                'records': result['records'],
                'pagination': result['pagination']
            }
        )
    except Exception as e:
        logger.error(f"分页查询失败: {str(e)}")
        raise HTTPException(
            status_code=500,
            detail=StandardResponse(
                success=False,
                error_code=500,
                error_msg=str(e)
            )
        )

@router.post("/nodes/paginated_search", response_model=StandardResponse)
async def paginated_search(
    payload: NodePaginatedSearchRequest,
    db: Session = Depends(get_db)
):
    try:
        service = KGNodeService(db)
        search_params = {
            'keyword': payload.name,
            'category': payload.category,
            'pageNo': payload.pageNo,
            'limit': payload.limit,
            'load_props': True
        }
        result = service.paginated_search(search_params)
        return StandardResponse(
            success=True,
            data={
                'records': result['records'],
                'pagination': result['pagination']
            }
        )
    except Exception as e:
        logger.error(f"分页查询失败: {str(e)}")
        raise HTTPException(
            status_code=500,
            detail=StandardResponse(
                success=False,
                error_code=500,
                error_msg=str(e)
            )
        )

@router.post("/nodes", response_model=StandardResponse)
async def create_node(
    payload: NodeCreateRequest,
    db: Session = Depends(get_db)
):
    try:
        service = TrunksService()
        result = service.create_node(payload.dict())
        return StandardResponse(success=True, data=result)
    except Exception as e:
        logger.error(f"创建节点失败: {str(e)}")
        raise HTTPException(500, detail=StandardResponse.error(str(e)))

@router.get("/nodes/{node_id}", response_model=StandardResponse)
async def get_node(
    node_id: int,
    db: Session = Depends(get_db)
):
    try:
        service = TrunksService()
        result = service.get_node(node_id)
        return StandardResponse(success=True, data=result)
    except Exception as e:
        logger.error(f"获取节点失败: {str(e)}")
        raise HTTPException(500, detail=StandardResponse.error(str(e)))

@router.put("/nodes/{node_id}", response_model=StandardResponse)
async def update_node(
    node_id: int,
    payload: NodeUpdateRequest,
    db: Session = Depends(get_db)
):
    try:
        service = TrunksService()
        result = service.update_node(node_id, payload.dict(exclude_unset=True))
        return StandardResponse(success=True, data=result)
    except Exception as e:
        logger.error(f"更新节点失败: {str(e)}")
        raise HTTPException(500, detail=StandardResponse.error(str(e)))

@router.delete("/nodes/{node_id}", response_model=StandardResponse)
async def delete_node(
    node_id: int,
    db: Session = Depends(get_db)
):
    try:
        service = TrunksService()
        service.delete_node(node_id)
        return StandardResponse(success=True)
    except Exception as e:
        logger.error(f"删除节点失败: {str(e)}")
        raise HTTPException(500, detail=StandardResponse.error(str(e)))

@router.post('/trunks/vector_search', response_model=StandardResponse)
async def vector_search(
    payload: VectorSearchRequest,
    db: Session = Depends(get_db)
):
    try:
        service = TrunksService()
        result = service.search_by_vector(
            payload.text,
            payload.limit,
            {'type': payload.type} if payload.type else None
        )
        return StandardResponse(success=True, data=result)
    except Exception as e:
        logger.error(f"向量搜索失败: {str(e)}")
        raise HTTPException(500, detail=StandardResponse.error(str(e)))

@router.get('/trunks/{trunk_id}', response_model=StandardResponse)
async def get_trunk(
    trunk_id: int,
    db: Session = Depends(get_db)
):
    try:
        service = TrunksService()
        result = service.get_trunk_by_id(trunk_id)
        return StandardResponse(success=True, data=result)
    except Exception as e:
        logger.error(f"获取trunk详情失败: {str(e)}")
        raise HTTPException(500, detail=StandardResponse.error(str(e)))

@router.get("/nodes/{src_id}/relationships", response_model=StandardResponse)
async def get_node_relationships(
    src_id: int,
    db: Session = Depends(get_db)
):
    try:
        edge_service = KGEdgeService(db)
        prop_service = KGPropService(db)
        
        edges = edge_service.get_edges_by_nodes(src_id=src_id, dest_id=None)
        relationships = []
        
        for edge in edges:
            dest_node = edge['dest_node']
            dest_props = [{'prop_title': p['prop_title'], 'prop_value': p['prop_value']} 
                          for p in prop_service.get_props_by_ref_id(dest_node['id'])]
            
            edge_props = [{'prop_title': p['prop_title'], 'prop_value': p['prop_value']}
                         for p in prop_service.get_props_by_ref_id(edge['id'])]
            
            relationships.append({
                "name": edge['name'],
                "properties": edge_props,
                "targetNode": {
                    "category": dest_node['category'],
                    "id": str(dest_node['id']),
                    "name": dest_node['name'],
                    "properties": dest_props
                }
            })
        
        return StandardResponse(
            success=True,
            data={"relationships": relationships}
        )
    except Exception as e:
        logger.error(f"获取节点关系失败: {str(e)}")
        raise HTTPException(500, detail=StandardResponse.error(str(e)))

saas_kb_router = router