#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
조국혁신당 크롤러 - 고성능 비동기 버전 + 허깅페이스 자동 업로드
- 기존 sync(requests) 방식을 async(aiohttp) 로 전환
- 증분 업데이트, 허깅페이스 자동 업로드
"""

import os
import json
import re
import asyncio
from datetime import datetime, timedelta
from typing import List, Dict, Optional
import pandas as pd
from tqdm.asyncio import tqdm as async_tqdm
import aiohttp
from bs4 import BeautifulSoup
from dotenv import load_dotenv
from huggingface_hub import HfApi, login
from datasets import Dataset, load_dataset

load_dotenv()


class RebuildingAsyncCrawler:
    def __init__(self, config_path="crawler_config.json"):
        self.base_url = "https://rebuildingkoreaparty.kr"
        self.party_name = "조국혁신당"
        self.config_path = config_path
        self.state_path = "crawler_state.json"

        self.load_config()

        self.hf_token = os.getenv("HF_TOKEN")
        self.hf_repo_id = os.getenv("HF_REPO_ID_REBUILDING", "rebuilding-press-releases")

        self.semaphore = asyncio.Semaphore(10)

    def load_config(self):
        default_config = {
            "boards": {
                "기자회견문": "news/press-conference",
                "논평브리핑": "news/commentary-briefing",
                "보도자료": "news/press-release"
            },
            "start_date": "2024-03-04",
            "max_pages": 10000,
            "concurrent_requests": 10,
            "request_delay": 0.5,
            "output_path": "./data"
        }

        if os.path.exists(self.config_path):
            with open(self.config_path, 'r', encoding='utf-8') as f:
                config = json.load(f)
                self.config = config.get('rebuilding', default_config)
        else:
            self.config = default_config

        self.boards = self.config["boards"]
        self.start_date = self.config["start_date"]
        self.max_pages = self.config["max_pages"]
        self.output_path = self.config["output_path"]

    def load_state(self) -> Dict:
        if os.path.exists(self.state_path):
            with open(self.state_path, 'r', encoding='utf-8') as f:
                state = json.load(f)
                return state.get('rebuilding', {})
        return {}

    def save_state(self, state: Dict):
        all_state = {}
        if os.path.exists(self.state_path):
            with open(self.state_path, 'r', encoding='utf-8') as f:
                all_state = json.load(f)
        all_state['rebuilding'] = state
        with open(self.state_path, 'w', encoding='utf-8') as f:
            json.dump(all_state, f, ensure_ascii=False, indent=2)

    @staticmethod
    def parse_date(date_str: str) -> Optional[datetime]:
        try:
            return datetime.strptime(date_str.strip(), '%Y-%m-%d')
        except:
            return None

    @staticmethod
    def clean_text(text: str) -> str:
        text = text.replace('\xa0', '').replace('\u200b', '').replace('​', '')
        return text.strip()

    async def fetch_with_retry(self, session: aiohttp.ClientSession, url: str,
                               max_retries: int = 3) -> Optional[str]:
        async with self.semaphore:
            for attempt in range(max_retries):
                try:
                    await asyncio.sleep(self.config.get("request_delay", 0.5))
                    async with session.get(url, timeout=aiohttp.ClientTimeout(total=15)) as response:
                        if response.status == 200:
                            return await response.text()
                except Exception:
                    if attempt < max_retries - 1:
                        await asyncio.sleep(1)
                    else:
                        return None
        return None

    async def fetch_list_page(self, session: aiohttp.ClientSession,
                              board_name: str, board_path: str, page_num: int,
                              start_date: datetime, end_date: datetime) -> tuple:
        if page_num == 1:
            url = f"{self.base_url}/{board_path}"
        else:
            url = f"{self.base_url}/{board_path}?page={page_num}"

        html = await self.fetch_with_retry(session, url)
        if not html:
            return [], False

        soup = BeautifulSoup(html, 'html.parser')

        # <a href="/news/{board_path}/..."> 패턴으로 게시글 링크 탐색
        article_links = soup.find_all('a', href=re.compile(f'^/news/{re.escape(board_path)}/'))
        if not article_links:
            return [], True

        data = []
        stop_flag = False
        seen_urls = set()

        for link in article_links:
            try:
                article_url = link.get('href', '')
                if article_url.startswith('/'):
                    article_url = self.base_url + article_url
                if article_url in seen_urls:
                    continue
                seen_urls.add(article_url)

                title = link.get_text(strip=True).replace('\n', ' ')

                # 같은 <ul> 안에서 날짜·카테고리 추출
                parent = link.find_parent('ul')
                if not parent:
                    parent_li = link.find_parent('li')
                    if parent_li:
                        parent = parent_li.find_parent('ul')

                date_str = ""
                category = ""
                if parent:
                    date_li = parent.find('li', {'class': 'td date'})
                    if date_li:
                        date_str = date_li.get_text(strip=True)
                    cate_li = parent.find('li', {'class': 'td category'})
                    if cate_li:
                        category = cate_li.get_text(strip=True)

                if not date_str:
                    continue

                article_date = self.parse_date(date_str)
                if not article_date:
                    continue
                if article_date < start_date:
                    stop_flag = True
                    break
                if article_date > end_date:
                    continue

                data.append({
                    'board_name': board_name,
                    'category': category,
                    'title': title,
                    'date': date_str,
                    'url': article_url
                })
            except:
                continue

        return data, stop_flag

    async def fetch_article_detail(self, session: aiohttp.ClientSession, url: str) -> Dict:
        html = await self.fetch_with_retry(session, url)
        if not html:
            return {'text': "본문 조회 실패", 'writer': ""}

        soup = BeautifulSoup(html, 'html.parser')
        text_parts = []
        writer = ""

        # 본문: <div class="editor ck-content"> 안의 <p> 태그
        contents_div = soup.find('div', {'class': 'editor ck-content'})
        if contents_div:
            paragraphs = contents_div.find_all('p')
            for p in paragraphs:
                cleaned = self.clean_text(p.get_text(strip=True))
                if cleaned:
                    text_parts.append(cleaned)

            # 작성자: 끝쪽 <p> 에서 당명/대변인 포함 텍스트
            for p in reversed(paragraphs):
                cleaned = self.clean_text(p.get_text(strip=True))
                if '조국혁신당' in cleaned or '대변인' in cleaned or '위원회' in cleaned:
                    writer = cleaned
                    break

        return {'text': '\n'.join(text_parts), 'writer': writer}

    async def collect_board(self, board_name: str, board_path: str,
                            start_date: str, end_date: str) -> List[Dict]:
        start_dt = datetime.strptime(start_date, '%Y-%m-%d')
        end_dt = datetime.strptime(end_date, '%Y-%m-%d')

        print(f"\n▶ [{board_name}] 목록 수집 시작...")

        headers = {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',
            'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
            'Accept-Language': 'ko-KR,ko;q=0.9',
        }

        async with aiohttp.ClientSession(headers=headers) as session:
            all_items = []
            page_num = 1
            empty_pages = 0
            max_empty_pages = 3

            with async_tqdm(desc=f"[{board_name}] 목록", unit="페이지") as pbar:
                while page_num <= self.max_pages:
                    items, stop_flag = await self.fetch_list_page(
                        session, board_name, board_path, page_num, start_dt, end_dt
                    )

                    if not items:
                        empty_pages += 1
                        if empty_pages >= max_empty_pages or stop_flag:
                            break
                    else:
                        empty_pages = 0
                        all_items.extend(items)

                    pbar.update(1)
                    pbar.set_postfix({"수집": len(all_items)})

                    if stop_flag:
                        break

                    page_num += 1

            print(f"  ✓ {len(all_items)}개 항목 발견")

            if all_items:
                print(f"  ▶ 상세 페이지 수집 중...")
                tasks = [self.fetch_article_detail(session, item['url']) for item in all_items]

                details = []
                for coro in async_tqdm(asyncio.as_completed(tasks),
                                       total=len(tasks),
                                       desc=f"[{board_name}] 상세"):
                    detail = await coro
                    details.append(detail)

                for item, detail in zip(all_items, details):
                    item.update(detail)

        print(f"✓ [{board_name}] 완료: {len(all_items)}개")
        return all_items

    async def collect_all(self, start_date: Optional[str] = None,
                          end_date: Optional[str] = None) -> pd.DataFrame:
        if not end_date:
            end_date = datetime.now().strftime('%Y-%m-%d')
        if not start_date:
            start_date = self.start_date

        print(f"\n{'='*60}")
        print(f"조국혁신당 보도자료 수집 - 비동기 고성능 버전")
        print(f"기간: {start_date} ~ {end_date}")
        print(f"{'='*60}")

        tasks = [
            self.collect_board(board_name, board_path, start_date, end_date)
            for board_name, board_path in self.boards.items()
        ]
        results = await asyncio.gather(*tasks)

        all_data = []
        for items in results:
            all_data.extend(items)

        if not all_data:
            print("\n⚠️ 수집된 데이터 없음")
            return pd.DataFrame()

        df = pd.DataFrame(all_data)
        df = df[['board_name', 'title', 'category', 'date', 'writer', 'text', 'url']]
        df = df[(df['title'] != "") & (df['text'] != "")]
        df['date'] = pd.to_datetime(df['date'], errors='coerce')

        print(f"\n✓ 총 {len(df)}개 수집 완료")
        return df

    def save_local(self, df: pd.DataFrame):
        os.makedirs(self.output_path, exist_ok=True)
        timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
        csv_path = os.path.join(self.output_path, f"{self.party_name}_{timestamp}.csv")
        xlsx_path = os.path.join(self.output_path, f"{self.party_name}_{timestamp}.xlsx")
        df.to_csv(csv_path, index=False, encoding='utf-8-sig')
        df.to_excel(xlsx_path, index=False, engine='openpyxl')
        print(f"✓ CSV: {csv_path}")
        print(f"✓ Excel: {xlsx_path}")

    def upload_to_huggingface(self, df: pd.DataFrame):
        if not self.hf_token:
            print("\n⚠️ HF_TOKEN이 설정되지 않았습니다.")
            return

        print(f"\n▶ 허깅페이스 업로드 중... (repo: {self.hf_repo_id})")
        try:
            login(token=self.hf_token)
            new_dataset = Dataset.from_pandas(df)
            try:
                existing_dataset = load_dataset(self.hf_repo_id, split='train')
                existing_df = existing_dataset.to_pandas()
                combined_df = pd.concat([existing_df, df], ignore_index=True)
                combined_df = combined_df.drop_duplicates(subset=['url'], keep='last')
                combined_df = combined_df.sort_values('date', ascending=False).reset_index(drop=True)
                final_dataset = Dataset.from_pandas(combined_df)
                print(f"  ✓ 병합 후: {len(final_dataset)}개")
            except:
                final_dataset = new_dataset
                print(f"  ℹ️ 신규 데이터셋 생성")
            final_dataset.push_to_hub(self.hf_repo_id, token=self.hf_token)
            print(f"✓ 허깅페이스 업로드 완료!")
        except Exception as e:
            print(f"✗ 업로드 실패: {e}")

    async def run_incremental(self):
        state = self.load_state()
        last_date = state.get('last_crawl_date')

        if last_date:
            start_date = (datetime.strptime(last_date, '%Y-%m-%d') + timedelta(days=1)).strftime('%Y-%m-%d')
            print(f"📅 증분 업데이트: {start_date} 이후 데이터만 수집")
        else:
            start_date = self.start_date
            print(f"📅 전체 수집: {start_date}부터")

        end_date = datetime.now().strftime('%Y-%m-%d')
        df = await self.collect_all(start_date, end_date)

        if df.empty:
            print("✓ 새로운 데이터 없음")
            return

        self.save_local(df)
        self.upload_to_huggingface(df)

        state['last_crawl_date'] = end_date
        state['last_crawl_time'] = datetime.now().isoformat()
        state['last_count'] = len(df)
        self.save_state(state)

        print(f"\n{'='*60}\n✓ 완료!\n{'='*60}\n")


async def main():
    crawler = RebuildingAsyncCrawler()
    await crawler.run_incremental()


if __name__ == "__main__":
    asyncio.run(main())