from fastapi import APIRouter, Depends
from sqlalchemy.orm import Session

from app.database import get_db
from app.models.link import Link
from app.schemas.link import LinkCreate, LinkResponse, LinkApply

router = APIRouter(tags=["友情链接"])


@router.get("/links", response_model=list[LinkResponse])
def list_links(db: Session = Depends(get_db)):
    """公开：获取已通过审核的友情链接"""
    return db.query(Link).filter(Link.status == "approved").order_by(Link.sort_order, Link.id).all()


@router.post("/links/apply", response_model=LinkResponse)
def apply_link(link_data: LinkApply, db: Session = Depends(get_db)):
    """公开：申请友链"""
    # 检查是否已存在同名或同URL的申请/已通过友链
    existing = db.query(Link).filter(
        (Link.name == link_data.name) | (Link.url == link_data.url)
    ).first()
    if existing:
        return existing  # 已存在则返回已有记录

    link = Link(
        name=link_data.name,
        url=link_data.url,
        description=link_data.description,
        contact=link_data.contact,
        status="pending",
        sort_order=999,  # 新申请放在最后
    )
    db.add(link)
    db.commit()
    db.refresh(link)
    return link