"""爬虫脚本API"""

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

from ..database import get_db
from ..models import University, ScraperScript
from ..schemas.script import (
    ScriptCreate,
    ScriptResponse,
    GenerateScriptRequest,
    GenerateScriptResponse
)
from ..services.script_generator import generate_scraper_script

router = APIRouter()


@router.post("/generate", response_model=GenerateScriptResponse)
async def generate_script(
    data: GenerateScriptRequest,
    background_tasks: BackgroundTasks,
    db: Session = Depends(get_db)
):
    """
    一键生成爬虫脚本

    分析大学网站结构，自动生成爬虫脚本
    """
    # 检查或创建大学记录
    university = db.query(University).filter(University.url == data.university_url).first()

    if not university:
        # 从URL提取大学名称
        name = data.university_name
        if not name:
            from urllib.parse import urlparse
            parsed = urlparse(data.university_url)
            name = parsed.netloc.replace("www.", "").split(".")[0].title()

        university = University(
            name=name,
            url=data.university_url,
            status="analyzing"
        )
        db.add(university)
        db.commit()
        db.refresh(university)
    else:
        # 更新状态
        university.status = "analyzing"
        db.commit()

    # 在后台执行脚本生成
    background_tasks.add_task(
        generate_scraper_script,
        university_id=university.id,
        university_url=data.university_url
    )

    return GenerateScriptResponse(
        success=True,
        university_id=university.id,
        script_id=None,
        message="正在分析网站结构并生成爬虫脚本...",
        status="analyzing"
    )


@router.get("/university/{university_id}", response_model=List[ScriptResponse])
def get_university_scripts(
    university_id: int,
    db: Session = Depends(get_db)
):
    """获取大学的所有爬虫脚本"""
    scripts = db.query(ScraperScript).filter(
        ScraperScript.university_id == university_id
    ).order_by(ScraperScript.version.desc()).all()

    return scripts


@router.get("/{script_id}", response_model=ScriptResponse)
def get_script(
    script_id: int,
    db: Session = Depends(get_db)
):
    """获取脚本详情"""
    script = db.query(ScraperScript).filter(ScraperScript.id == script_id).first()
    if not script:
        raise HTTPException(status_code=404, detail="脚本不存在")

    return script


@router.post("", response_model=ScriptResponse)
def create_script(
    data: ScriptCreate,
    db: Session = Depends(get_db)
):
    """手动创建脚本"""
    # 检查大学是否存在
    university = db.query(University).filter(University.id == data.university_id).first()
    if not university:
        raise HTTPException(status_code=404, detail="大学不存在")

    # 获取当前最高版本
    max_version = db.query(ScraperScript).filter(
        ScraperScript.university_id == data.university_id
    ).count()

    script = ScraperScript(
        university_id=data.university_id,
        script_name=data.script_name,
        script_content=data.script_content,
        config_content=data.config_content,
        version=max_version + 1,
        status="active"
    )

    db.add(script)
    db.commit()
    db.refresh(script)

    # 更新大学状态
    university.status = "ready"
    db.commit()

    return script


@router.put("/{script_id}", response_model=ScriptResponse)
def update_script(
    script_id: int,
    data: ScriptCreate,
    db: Session = Depends(get_db)
):
    """更新脚本"""
    script = db.query(ScraperScript).filter(ScraperScript.id == script_id).first()
    if not script:
        raise HTTPException(status_code=404, detail="脚本不存在")

    script.script_content = data.script_content
    if data.config_content:
        script.config_content = data.config_content

    db.commit()
    db.refresh(script)

    return script


@router.delete("/{script_id}")
def delete_script(
    script_id: int,
    db: Session = Depends(get_db)
):
    """删除脚本"""
    script = db.query(ScraperScript).filter(ScraperScript.id == script_id).first()
    if not script:
        raise HTTPException(status_code=404, detail="脚本不存在")

    db.delete(script)
    db.commit()

    return {"message": "删除成功"}