from typing import List
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session

from app.database import get_db
from app.core.deps import require_roles
from app.models.user import User
from app.schemas.common import ApiResponse, PagedData
from app.schemas.workflow import WorkflowDefCreate, WorkflowDefUpdate, WorkflowDefOut, WorkflowNodeCreate, WorkflowNodeOut
from app.services.workflow import WorkflowService

router = APIRouter(prefix="/api/workflows", tags=["工作流配置"])


@router.get("/", response_model=ApiResponse[PagedData[WorkflowDefOut]])
def list_workflows(
    page: int = 1,
    pageSize: int = 10,
    db: Session = Depends(get_db),
    _: User = Depends(require_roles("ADMIN")),
):
    rows, total = WorkflowService.get_paged(db, page=page, page_size=pageSize)
    out_rows = [WorkflowDefOut.model_validate(r) for r in rows]
    paged_data = PagedData(rows=out_rows, total=total, page=page, page_size=pageSize)
    return ApiResponse(data=paged_data)


@router.get("/biz/{biz_type}", response_model=ApiResponse[WorkflowDefOut])
def get_workflow_by_biz_type(biz_type: str, db: Session = Depends(get_db), _: User = Depends(require_roles("ADMIN"))):
    workflow = WorkflowService.get_by_biz_type(db, biz_type)
    if not workflow:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="工作流不存在")
    return ApiResponse(data=WorkflowDefOut.model_validate(workflow))


@router.get("/{workflow_id}", response_model=ApiResponse[WorkflowDefOut])
def get_workflow(workflow_id: int, db: Session = Depends(get_db), _: User = Depends(require_roles("ADMIN"))):
    workflow = WorkflowService.get_by_id(db, workflow_id)
    if not workflow:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="工作流不存在")
    return ApiResponse(data=WorkflowDefOut.model_validate(workflow))


@router.post("/", response_model=ApiResponse[WorkflowDefOut])
def create_workflow(body: WorkflowDefCreate, db: Session = Depends(get_db), _: User = Depends(require_roles("ADMIN"))):
    data = body.model_dump(exclude_unset=True)
    nodes_data = data.pop("nodes", [])
    workflow = WorkflowService.create(db, data)
    if nodes_data:
        for n in nodes_data:
            n["wf_id"] = workflow.id
        WorkflowService.save_nodes(db, workflow.id, nodes_data)
        db.refresh(workflow)
    return ApiResponse(data=WorkflowDefOut.model_validate(workflow))


@router.put("/{workflow_id}", response_model=ApiResponse[WorkflowDefOut])
def update_workflow(workflow_id: int, body: WorkflowDefUpdate, db: Session = Depends(get_db), _: User = Depends(require_roles("ADMIN"))):
    data = body.model_dump(exclude_unset=True)
    nodes_data = data.pop("nodes", None)
    workflow = WorkflowService.update(db, workflow_id, data)
    if not workflow:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="工作流不存在")
    if nodes_data is not None:
        WorkflowService.save_nodes(db, workflow_id, nodes_data)
        db.refresh(workflow)
    return ApiResponse(data=WorkflowDefOut.model_validate(workflow))


@router.put("/{workflow_id}/nodes", response_model=ApiResponse[WorkflowDefOut])
def save_workflow_nodes(
    workflow_id: int,
    body: List[WorkflowNodeCreate],
    db: Session = Depends(get_db),
    _: User = Depends(require_roles("ADMIN")),
):
    nodes_data = [n.model_dump(exclude_unset=True) for n in body]
    WorkflowService.save_nodes(db, workflow_id, nodes_data)
    workflow = WorkflowService.get_by_id(db, workflow_id)
    if not workflow:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="工作流不存在")
    return ApiResponse(data=WorkflowDefOut.model_validate(workflow))


@router.delete("/{workflow_id}", response_model=ApiResponse[None])
def delete_workflow(workflow_id: int, db: Session = Depends(get_db), _: User = Depends(require_roles("ADMIN"))):
    WorkflowService.soft_delete(db, workflow_id)
    return ApiResponse(data=None)