from fastapi import APIRouter, HTTPException
import requests
import xml.etree.ElementTree as ET
from datetime import datetime, timedelta


class RSSService:
    @staticmethod
    def get_rss_by_username(username: str):
        url = f"https://git.numerum.team/{username}.rss"
        response = requests.get(url)

        if response.status_code != 200:
            raise HTTPException(status_code=400, detail="Не удалось загрузить RSS")

        root = ET.fromstring(response.text)
        items = root.findall(".//item")

        activity_map = {}

        for item in items:
            pub_date_elem = item.find("pubDate")
            if pub_date_elem is not None:
                pub_date_str = pub_date_elem.text.strip()
                pub_date = datetime.strptime(pub_date_str, "%a, %d %b %Y %H:%M:%S %z")
                date_str = pub_date.strftime("%Y-%m-%d")
                activity_map[date_str] = activity_map.get(date_str, 0) + 1

        today = datetime.now(pub_date.tzinfo)
        activity_days = 365
        result = []

        for i in range(activity_days - 1, -1, -1):
            day = today - timedelta(days=i)
            date_str = day.strftime("%Y-%m-%d")
            count = activity_map.get(date_str, 0)
            result.append({"date": date_str, "count": count})

        return result