from __future__ import annotations
from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.orm import Session
from sqlalchemy import func as sqlfunc

from app.database import get_db
from app.auth import get_current_user
from app.models.story import Story
from app.schemas.story import StorySchema, StoryResponse, StoryListResponse

router = APIRouter(prefix="/api/stories", tags=["客户故事"], dependencies=[Depends(get_current_user)])


@router.get("/", response_model=StoryListResponse)
def list_stories(
    page: int = Query(1, ge=1),
    page_size: int = Query(20, ge=1, le=100),
    keyword: str = Query("", description="搜索关键词"),
    db: Session = Depends(get_db),
):
    query = db.query(Story)
    if keyword:
        query = query.filter(Story.title.contains(keyword) | Story.customer_name.contains(keyword))
    total = query.count()
    items = query.order_by(Story.sort_order, Story.id.desc()).offset((page - 1) * page_size).limit(page_size).all()
    return StoryListResponse(
        items=[StoryResponse.model_validate(s) for s in items],
        total=total,
    )


@router.post("/", response_model=StoryResponse, status_code=201)
def create_story(req: StorySchema, db: Session = Depends(get_db)):
    max_order = db.query(sqlfunc.max(Story.sort_order)).scalar() or 0
    story = Story(**req.model_dump(), sort_order=max_order + 1)
    db.add(story)
    db.commit()
    db.refresh(story)
    return StoryResponse.model_validate(story)


@router.put("/{story_id}", response_model=StoryResponse)
def update_story(story_id: int, req: StorySchema, db: Session = Depends(get_db)):
    story = db.query(Story).get(story_id)
    if not story:
        raise HTTPException(status_code=404, detail="故事不存在")
    for key, val in req.model_dump().items():
        setattr(story, key, val)
    db.commit()
    db.refresh(story)
    return StoryResponse.model_validate(story)


@router.delete("/{story_id}")
def delete_story(story_id: int, db: Session = Depends(get_db)):
    story = db.query(Story).get(story_id)
    if not story:
        raise HTTPException(status_code=404, detail="故事不存在")
    db.delete(story)
    db.commit()
    return {"message": "删除成功"}


@router.put("/reorder/batch")
def reorder_stories(ids: list[int], db: Session = Depends(get_db)):
    for i, sid in enumerate(ids):
        db.query(Story).filter(Story.id == sid).update({"sort_order": i})
    db.commit()
    return {"message": "排序更新成功"}