# 宇之然内容创作平台 - 选题管理API

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

from ..core.security import get_current_admin_user, create_audit_log
from ..database import get_db
from ..models import Topic, User

router = APIRouter()

class TopicCreateRequest(BaseModel):
    title: str
    field: Optional[str] = None
    priority_score: int = 0

class TopicUpdateRequest(BaseModel):
    title: Optional[str] = None
    field: Optional[str] = None
    priority_score: Optional[int] = None
    status: Optional[str] = None

@router.get("/", response_model=List[dict])
async def get_topics(
    status: Optional[str] = Query(None),
    page: int = Query(1, ge=1),
    size: int = Query(20, ge=1, le=100),
    db: Session = Depends(get_db)
):
    """获取选题列表"""
    query = db.query(Topic)
    
    # 状态筛选
    if status:
        query = query.filter(Topic.status == status)
    
    # 分页
    offset = (page - 1) * size
    topics = query.offset(offset).limit(size).all()
    
    # 转换为字典格式
    result = []
    for topic in topics:
        result.append({
            "id": topic.id,
            "title": topic.title,
            "field": topic.field,
            "priority_score": topic.priority_score,
            "status": topic.status,
            "compliance_score": topic.compliance_score,
            "created_at": topic.created_at.isoformat() if topic.created_at else None,
            "updated_at": topic.updated_at.isoformat() if topic.updated_at else None,
            "generated_at": topic.generated_at.isoformat() if topic.generated_at else None,
            "published_at": topic.published_at.isoformat() if topic.published_at else None,
            "published_urls": topic.published_urls
        })
    
    return result

@router.post("/", response_model=dict)
async def create_topic(
    topic_data: TopicCreateRequest,
    current_user: User = Depends(get_current_admin_user),
    db: Session = Depends(get_db)
):
    """创建新选题（管理员功能）"""
    new_topic = Topic(
        title=topic_data.title,
        field=topic_data.field,
        priority_score=topic_data.priority_score,
        status="待处理"
    )
    db.add(new_topic)
    db.commit()
    db.refresh(new_topic)
    
    # 记录审计日志
    create_audit_log(
        db=db,
        user_id=current_user.id,
        action="create_topic",
        resource_type="topic",
        resource_id=new_topic.id,
        details=f"标题: {topic_data.title}"
    )
    
    return {
        "id": new_topic.id,
        "title": new_topic.title,
        "status": new_topic.status,
        "created_at": new_topic.created_at.isoformat() if new_topic.created_at else None
    }

@router.put("/{topic_id}", response_model=dict)
async def update_topic(
    topic_id: int,
    topic_data: TopicUpdateRequest,
    current_user: User = Depends(get_current_admin_user),
    db: Session = Depends(get_db)
):
    """更新选题信息（管理员功能）"""
    topic = db.query(Topic).filter(Topic.id == topic_id).first()
    if not topic:
        raise HTTPException(status_code=404, detail="选题不存在")
    
    # 更新字段
    if topic_data.title is not None:
        topic.title = topic_data.title
    if topic_data.field is not None:
        topic.field = topic_data.field
    if topic_data.priority_score is not None:
        topic.priority_score = topic_data.priority_score
    if topic_data.status is not None:
        topic.status = topic_data.status
    
    topic.updated_at = datetime.utcnow()
    db.commit()
    db.refresh(topic)
    
    # 记录审计日志
    create_audit_log(
        db=db,
        user_id=current_user.id,
        action="update_topic",
        resource_type="topic",
        resource_id=topic_id,
        details=f"状态更新为: {topic_data.status}"
    )
    
    return {
        "id": topic.id,
        "title": topic.title,
        "status": topic.status,
        "updated_at": topic.updated_at.isoformat() if topic.updated_at else None
    }

@router.delete("/{topic_id}")
async def delete_topic(
    topic_id: int,
    current_user: User = Depends(get_current_admin_user),
    db: Session = Depends(get_db)
):
    """删除选题（管理员功能）"""
    topic = db.query(Topic).filter(Topic.id == topic_id).first()
    if not topic:
        raise HTTPException(status_code=404, detail="选题不存在")
    
    db.delete(topic)
    db.commit()
    
    # 记录审计日志
    create_audit_log(
        db=db,
        user_id=current_user.id,
        action="delete_topic",
        resource_type="topic",
        resource_id=topic_id,
        details="选题已删除"
    )
    
    return {"message": "选题已成功删除"}

@router.get("/{topic_id}", response_model=dict)
async def get_topic(
    topic_id: int,
    db: Session = Depends(get_db)
):
    """获取单个选题详情"""
    topic = db.query(Topic).filter(Topic.id == topic_id).first()
    if not topic:
        raise HTTPException(status_code=404, detail="选题不存在")
    
    return {
        "id": topic.id,
        "title": topic.title,
        "field": topic.field,
        "priority_score": topic.priority_score,
        "status": topic.status,
        "compliance_score": topic.compliance_score,
        "created_at": topic.created_at.isoformat() if topic.created_at else None,
        "updated_at": topic.updated_at.isoformat() if topic.updated_at else None,
        "generated_at": topic.generated_at.isoformat() if topic.generated_at else None,
        "published_at": topic.published_at.isoformat() if topic.published_at else None,
        "published_urls": topic.published_urls
    }