from __future__ import annotations
from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session

from app.database import get_db
from app.auth import get_current_user
from app.models.guide import GuideConfig, GuideSection
from app.schemas.guide import GuideConfigSchema, GuideSectionSchema, GuideSectionResponse

router = APIRouter(prefix="/api/guides", tags=["出行指南"], dependencies=[Depends(get_current_user)])


def _get_config(db: Session) -> GuideConfig:
    config = db.query(GuideConfig).first()
    if not config:
        config = GuideConfig()
        db.add(config)
        db.flush()
    return config


@router.get("/config", response_model=GuideConfigSchema)
def get_config(db: Session = Depends(get_db)):
    c = _get_config(db)
    return GuideConfigSchema(page_intro=c.page_intro)


@router.put("/config")
def update_config(req: GuideConfigSchema, db: Session = Depends(get_db)):
    c = _get_config(db)
    c.page_intro = req.page_intro
    db.commit()
    return {"message": "更新成功"}


@router.get("/sections", response_model=list[GuideSectionResponse])
def list_sections(db: Session = Depends(get_db)):
    c = _get_config(db)
    sections = db.query(GuideSection).filter_by(config_id=c.id).order_by(GuideSection.sort_order).all()
    return [GuideSectionResponse.model_validate(s) for s in sections]


@router.put("/sections/{section_id}")
def update_section(section_id: str, req: GuideSectionSchema, db: Session = Depends(get_db)):
    c = _get_config(db)
    section = db.query(GuideSection).filter_by(config_id=c.id, section_id=section_id).first()
    if not section:
        raise HTTPException(status_code=404, detail=f"章节 {section_id} 不存在")
    section.title = req.title
    section.subtitle = req.subtitle
    section.icon = req.icon
    section.content = req.content
    section.data = req.data
    db.commit()
    return {"message": "更新成功"}