"""文章管理 API"""
from typing import Optional
from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel
from sqlalchemy.orm import Session
from sqlalchemy import desc
from database import get_db
from models import Article, Feed
from fulltext_search import search_articles

router = APIRouter(prefix="/articles", tags=["articles"])


class ArticleOut(BaseModel):
    id: int
    feed_id: int
    title: str
    link: str
    author: str
    published_at: Optional[str]
    summary: str
    is_read: bool
    created_at: str
    feed_title: str
    category: str

    class Config:
        from_attributes = True


@router.get("")
def list_articles(
    skip: int = 0,
    limit: int = 50,
    feed_id: Optional[int] = None,
    category: Optional[str] = None,
    search: Optional[str] = None,
    since: Optional[str] = None,
    until: Optional[str] = None,
    is_read: Optional[bool] = None,
    db: Session = Depends(get_db),
):
    """获取文章列表，支持多种筛选条件"""

    # 如果有搜索关键词，使用 FTS5 全文搜索
    if search and search.strip():
        results, total = search_articles(search.strip(), limit=limit, offset=skip)
        return {"total": total, "items": results}

    query = db.query(Article, Feed.title.label("feed_title"), Feed.category.label("category")).join(Feed)

    if feed_id:
        query = query.filter(Article.feed_id == feed_id)
    if category:
        query = query.filter(Feed.category == category)
    if is_read is not None:
        query = query.filter(Article.is_read == is_read)
    if since:
        query = query.filter(Article.published_at >= since)
    if until:
        query = query.filter(Article.published_at <= until)

    total = query.count()
    rows = query.order_by(desc(Article.published_at)).offset(skip).limit(limit).all()

    items = []
    for article, feed_title, category in rows:
        items.append({
            "id": article.id,
            "feed_id": article.feed_id,
            "title": article.title or "",
            "link": article.link,
            "author": article.author or "",
            "published_at": article.published_at.isoformat() if article.published_at else None,
            "summary": article.summary or "",
            "is_read": article.is_read,
            "created_at": article.created_at.isoformat(),
            "feed_title": feed_title or "",
            "category": category or "",
        })

    return {"total": total, "items": items}


@router.get("/{article_id}")
def get_article(article_id: int, db: Session = Depends(get_db)):
    """获取文章详情"""
    article = db.query(Article).filter(Article.id == article_id).first()
    if not article:
        raise HTTPException(status_code=404, detail="文章不存在")

    feed = db.query(Feed).filter(Feed.id == article.feed_id).first()

    return {
        "id": article.id,
        "feed_id": article.feed_id,
        "title": article.title or "",
        "link": article.link,
        "author": article.author or "",
        "published_at": article.published_at.isoformat() if article.published_at else None,
        "content": article.content or "",
        "summary": article.summary or "",
        "is_read": article.is_read,
        "created_at": article.created_at.isoformat(),
        "feed_title": feed.title if feed else "",
        "category": feed.category if feed else "",
    }


@router.put("/{article_id}/read")
def mark_read(article_id: int, db: Session = Depends(get_db)):
    """标记文章为已读"""
    article = db.query(Article).filter(Article.id == article_id).first()
    if not article:
        raise HTTPException(status_code=404, detail="文章不存在")

    article.is_read = True
    db.commit()
    return {"message": "已标记为已读"}


@router.get("/search/fulltext")
def fulltext_search(
    q: str,
    skip: int = 0,
    limit: int = 50,
):
    """全文搜索文章"""
    results, total = search_articles(q, limit=limit, offset=skip)
    return {"total": total, "items": results}