"""大学管理API"""

from typing import List, Optional
from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.orm import Session

from ..database import get_db
from ..models import University, ScrapeResult
from ..schemas.university import (
    UniversityCreate,
    UniversityUpdate,
    UniversityResponse,
    UniversityListResponse
)

router = APIRouter()


@router.get("", response_model=UniversityListResponse)
def list_universities(
    skip: int = Query(0, ge=0),
    limit: int = Query(20, ge=1, le=100),
    search: Optional[str] = None,
    db: Session = Depends(get_db)
):
    """获取大学列表"""
    query = db.query(University)

    if search:
        query = query.filter(University.name.ilike(f"%{search}%"))

    total = query.count()
    universities = query.order_by(University.created_at.desc()).offset(skip).limit(limit).all()

    # 添加统计信息
    items = []
    for uni in universities:
        # 获取最新结果
        latest_result = db.query(ScrapeResult).filter(
            ScrapeResult.university_id == uni.id
        ).order_by(ScrapeResult.created_at.desc()).first()

        items.append(UniversityResponse(
            id=uni.id,
            name=uni.name,
            url=uni.url,
            country=uni.country,
            description=uni.description,
            status=uni.status,
            created_at=uni.created_at,
            updated_at=uni.updated_at,
            scripts_count=len(uni.scripts),
            jobs_count=len(uni.jobs),
            latest_result={
                "schools_count": latest_result.schools_count,
                "programs_count": latest_result.programs_count,
                "faculty_count": latest_result.faculty_count,
                "created_at": latest_result.created_at.isoformat()
            } if latest_result else None
        ))

    return UniversityListResponse(total=total, items=items)


@router.post("", response_model=UniversityResponse)
def create_university(
    data: UniversityCreate,
    db: Session = Depends(get_db)
):
    """创建大学"""
    # 检查是否已存在
    existing = db.query(University).filter(University.url == data.url).first()
    if existing:
        raise HTTPException(status_code=400, detail="该大学URL已存在")

    university = University(**data.model_dump())
    db.add(university)
    db.commit()
    db.refresh(university)

    return UniversityResponse(
        id=university.id,
        name=university.name,
        url=university.url,
        country=university.country,
        description=university.description,
        status=university.status,
        created_at=university.created_at,
        updated_at=university.updated_at,
        scripts_count=0,
        jobs_count=0,
        latest_result=None
    )


@router.get("/{university_id}", response_model=UniversityResponse)
def get_university(
    university_id: int,
    db: Session = Depends(get_db)
):
    """获取大学详情"""
    university = db.query(University).filter(University.id == university_id).first()
    if not university:
        raise HTTPException(status_code=404, detail="大学不存在")

    # 获取最新结果
    latest_result = db.query(ScrapeResult).filter(
        ScrapeResult.university_id == university.id
    ).order_by(ScrapeResult.created_at.desc()).first()

    return UniversityResponse(
        id=university.id,
        name=university.name,
        url=university.url,
        country=university.country,
        description=university.description,
        status=university.status,
        created_at=university.created_at,
        updated_at=university.updated_at,
        scripts_count=len(university.scripts),
        jobs_count=len(university.jobs),
        latest_result={
            "schools_count": latest_result.schools_count,
            "programs_count": latest_result.programs_count,
            "faculty_count": latest_result.faculty_count,
            "created_at": latest_result.created_at.isoformat()
        } if latest_result else None
    )


@router.put("/{university_id}", response_model=UniversityResponse)
def update_university(
    university_id: int,
    data: UniversityUpdate,
    db: Session = Depends(get_db)
):
    """更新大学信息"""
    university = db.query(University).filter(University.id == university_id).first()
    if not university:
        raise HTTPException(status_code=404, detail="大学不存在")

    update_data = data.model_dump(exclude_unset=True)
    for field, value in update_data.items():
        setattr(university, field, value)

    db.commit()
    db.refresh(university)

    return get_university(university_id, db)


@router.delete("/{university_id}")
def delete_university(
    university_id: int,
    db: Session = Depends(get_db)
):
    """删除大学"""
    university = db.query(University).filter(University.id == university_id).first()
    if not university:
        raise HTTPException(status_code=404, detail="大学不存在")

    db.delete(university)
    db.commit()

    return {"message": "删除成功"}