from typing import List

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

from app.core.bx_auth import BxUserContext, get_bx_current_user
from app.core.database import get_db
from app.core.tenant_context import get_tenant_no
from app.schemas.bx.common import ApiResponse, PagedData
from app.schemas.bx.workflow import (
    WorkflowDefCreate,
    WorkflowDefOut,
    WorkflowDefUpdate,
    WorkflowNodeCreate,
)
from app.services.bx.workflow import WorkflowService

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


@router.get("/", response_model=ApiResponse[PagedData[WorkflowDefOut]])
def list_workflows(
    page: int = 1,
    pageSize: int = Query(10, ge=1, le=500),
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    tenant_no = get_tenant_no(db, user.to_tenant_user_dict())
    rows, total = WorkflowService.get_paged(db, tenant_no, page=page, page_size=pageSize, user=user)
    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: BxUserContext = Depends(get_bx_current_user),
):
    workflow = WorkflowService.ensure_by_biz_type(db, biz_type, user=user)
    if not workflow:
        return ApiResponse(data=None)
    return ApiResponse(data=WorkflowDefOut.model_validate(workflow))


@router.get("/{workflow_id}", response_model=ApiResponse[WorkflowDefOut])
def get_workflow(
    workflow_id: str,
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    tenant_no = get_tenant_no(db, user.to_tenant_user_dict())
    workflow = WorkflowService.get_by_id(db, workflow_id, tenant_no, user=user)
    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: BxUserContext = Depends(get_bx_current_user),
):
    data = body.model_dump(exclude_unset=True)
    nodes_data = data.pop("nodes", []) or []
    workflow = WorkflowService.create(db, data, user=user)
    if nodes_data:
        try:
            WorkflowService.save_nodes(db, workflow.id, nodes_data, user=user)
        except ValueError as exc:
            db.rollback()
            code = (
                status.HTTP_400_BAD_REQUEST
                if "发放登记" in str(exc)
                else status.HTTP_404_NOT_FOUND
            )
            raise HTTPException(status_code=code, detail=str(exc)) from exc
    db.commit()
    db.refresh(workflow)
    return ApiResponse(data=WorkflowDefOut.model_validate(workflow))


@router.put("/{workflow_id}", response_model=ApiResponse[WorkflowDefOut])
def update_workflow(
    workflow_id: str,
    body: WorkflowDefUpdate,
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    tenant_no = get_tenant_no(db, user.to_tenant_user_dict())
    data = body.model_dump(exclude_unset=True)
    nodes_data = data.pop("nodes", None)
    workflow = WorkflowService.update(db, workflow_id, data, user=user)
    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:
        try:
            WorkflowService.save_nodes(db, workflow_id, nodes_data, user=user)
        except ValueError as exc:
            db.rollback()
            code = (
                status.HTTP_400_BAD_REQUEST
                if "发放登记" in str(exc)
                else status.HTTP_404_NOT_FOUND
            )
            raise HTTPException(status_code=code, detail=str(exc)) from exc
    db.commit()
    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: str,
    body: List[WorkflowNodeCreate],
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    tenant_no = get_tenant_no(db, user.to_tenant_user_dict())
    nodes_data = [n.model_dump(exclude_unset=True) for n in body]
    try:
        WorkflowService.save_nodes(db, workflow_id, nodes_data, user=user)
    except ValueError as exc:
        db.rollback()
        code = (
            status.HTTP_400_BAD_REQUEST
            if "发放登记" in str(exc)
            else status.HTTP_404_NOT_FOUND
        )
        raise HTTPException(status_code=code, detail=str(exc)) from exc
    workflow = WorkflowService.get_by_id(db, workflow_id, tenant_no, user=user)
    if not workflow:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="工作流不存在")
    db.commit()
    db.refresh(workflow)
    return ApiResponse(data=WorkflowDefOut.model_validate(workflow))


@router.delete("/{workflow_id}", response_model=ApiResponse[None])
def delete_workflow(
    workflow_id: str,
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    tenant_no = get_tenant_no(db, user.to_tenant_user_dict())
    workflow = WorkflowService.get_by_id(db, workflow_id, tenant_no, user=user)
    if not workflow:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="工作流不存在")
    WorkflowService.soft_delete(db, workflow_id, user=user)
    db.commit()
    return ApiResponse(data=None)