"""모닝 브리핑 — 일정·메일·보고·뉴스 요약 → Synology Chat (LaunchAgent, 매일 07:30)"""

import json
import logging
import os
from datetime import datetime, timedelta, timezone

import httpx
from dotenv import load_dotenv

load_dotenv()

logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(message)s")
logger = logging.getLogger("morning_briefing")

CALDAV_BRIDGE_URL = os.getenv("CALDAV_BRIDGE_URL", "http://127.0.0.1:8092").replace("host.docker.internal", "127.0.0.1")
KARAKEEP_URL = os.getenv("KARAKEEP_API_URL", os.getenv("KARAKEEP_URL", "http://localhost:3000"))
KARAKEEP_API_KEY = os.getenv("KARAKEEP_API_KEY", "")
GPU_OLLAMA_URL = os.getenv("GPU_OLLAMA_URL", "http://192.168.1.186:11434")
SYNOLOGY_CHAT_WEBHOOK_URL = os.getenv("SYNOLOGY_CHAT_WEBHOOK_URL", "")

PG_HOST = os.getenv("PG_HOST", "127.0.0.1")
PG_PORT = int(os.getenv("PG_PORT", "15478"))
PG_USER = os.getenv("POSTGRES_USER", "bot")
PG_PASS = os.getenv("POSTGRES_PASSWORD", "")
PG_DB = os.getenv("POSTGRES_DB", "chatbot")

KST = timezone(timedelta(hours=9))
WEEKDAYS = ["월", "화", "수", "목", "금", "토", "일"]


def get_db_connection():
    import psycopg2
    return psycopg2.connect(
        host=PG_HOST, port=PG_PORT,
        user=PG_USER, password=PG_PASS, dbname=PG_DB,
    )


def fetch_today_events() -> list[dict]:
    """CalDAV 브릿지에서 오늘 일정 조회."""
    now = datetime.now(KST)
    start = now.replace(hour=0, minute=0, second=0, microsecond=0).isoformat()
    end = now.replace(hour=23, minute=59, second=59, microsecond=0).isoformat()

    try:
        resp = httpx.post(
            f"{CALDAV_BRIDGE_URL}/calendar/query",
            json={"start": start, "end": end},
            timeout=10,
        )
        data = resp.json()
        if not data.get("success"):
            return []
        events = data.get("events", [])
        events.sort(key=lambda e: e.get("start", ""))
        return events
    except Exception as e:
        logger.error(f"CalDAV fetch failed: {e}")
        return []


def fetch_important_mails() -> list[dict]:
    """DB에서 최근 24시간 업무 메일 조회."""
    try:
        conn = get_db_connection()
        with conn.cursor() as cur:
            cur.execute(
                "SELECT from_address, subject, summary FROM mail_logs "
                "WHERE label = '업무' AND mail_date > NOW() - INTERVAL '24 hours' "
                "ORDER BY mail_date DESC LIMIT 10"
            )
            rows = cur.fetchall()
        conn.close()
        return [{"from": r[0], "subject": r[1], "summary": r[2]} for r in rows]
    except Exception as e:
        logger.error(f"Mail fetch failed: {e}")
        return []


def fetch_open_reports() -> list[dict]:
    """DB에서 미해결 현장보고 조회."""
    try:
        conn = get_db_connection()
        with conn.cursor() as cur:
            cur.execute(
                "SELECT category, summary, created_at FROM field_reports "
                "WHERE status = 'open' "
                "ORDER BY created_at DESC LIMIT 10"
            )
            rows = cur.fetchall()
        conn.close()
        return [{"category": r[0], "summary": r[1], "created_at": r[2]} for r in rows]
    except Exception as e:
        logger.error(f"Reports fetch failed: {e}")
        return []


def fetch_news(since: datetime) -> list[dict]:
    """Karakeep에서 최근 24시간 뉴스 조회."""
    headers = {"Authorization": f"Bearer {KARAKEEP_API_KEY}"} if KARAKEEP_API_KEY else {}

    try:
        resp = httpx.get(
            f"{KARAKEEP_URL}/api/v1/bookmarks",
            params={"limit": 50},
            headers=headers,
            timeout=15,
        )
        resp.raise_for_status()
        data = resp.json()

        bookmarks = data.get("bookmarks", data if isinstance(data, list) else [])
        articles = []
        for bm in bookmarks:
            created = bm.get("createdAt") or bm.get("created_at") or ""
            if created:
                try:
                    dt = datetime.fromisoformat(created.replace("Z", "+00:00"))
                    if dt < since:
                        continue
                except ValueError:
                    pass

            title = bm.get("title") or bm.get("content", {}).get("title", "")
            if title:
                articles.append({"title": title})

        return articles
    except Exception as e:
        logger.error(f"Karakeep fetch failed: {e}")
        return []


def summarize_news(articles: list[dict]) -> list[str]:
    """LLM으로 뉴스 한줄 요약. 실패 시 원본 제목 fallback."""
    if not articles:
        return []

    titles = [a["title"] for a in articles[:5]]
    prompt = "다음 뉴스 제목들을 각각 한 줄로 짧게 한국어 요약하세요. 번호 없이 줄바꿈으로 구분.\n\n" + "\n".join(titles)

    try:
        resp = httpx.post(
            f"{GPU_OLLAMA_URL}/api/generate",
            json={
                "model": "id-9b:latest",
                "system": "/no_think",
                "prompt": prompt,
                "stream": False,
                "think": False,
            },
            timeout=15,
        )
        lines = [l.strip() for l in resp.json().get("response", "").strip().split("\n") if l.strip()]
        if lines:
            return lines[:5]
    except Exception as e:
        logger.error(f"News summarize failed: {e}")

    return titles[:5]


def format_briefing(events: list | None, mails: list | None,
                    reports: list | None, news: list[str] | None) -> str | None:
    """브리핑 텍스트 조립. 전체 데이터 없으면 None."""
    now = datetime.now(KST)
    weekday = WEEKDAYS[now.weekday()]
    header = f"[모닝 브리핑] {now.strftime('%Y-%m-%d')} ({weekday})"

    sections = []

    # 일정
    if events:
        limit = 10
        lines = []
        for e in events[:limit]:
            start = e.get("start", "")
            time_str = start[11:16] if len(start) >= 16 else ""
            title = e.get("summary") or e.get("title", "")
            location = e.get("location", "")
            entry = f"- {time_str} {title}" if time_str else f"- {title}"
            if location:
                entry += f" ({location})"
            lines.append(entry)
        count_str = f"{len(events)}건"
        if len(events) > limit:
            count_str = f"{limit}건, 외 {len(events) - limit}건"
        sections.append(f"[일정] 오늘 ({count_str})\n" + "\n".join(lines))

    # 메일
    if mails:
        limit = 5
        lines = []
        for m in mails[:limit]:
            sender = m.get("from", "").split("<")[0].strip().strip('"')
            lines.append(f"- {sender}: {m.get('subject', '')}")
        count_str = f"{len(mails)}건"
        if len(mails) > limit:
            count_str = f"{limit}건, 외 {len(mails) - limit}건"
        sections.append(f"[메일] 주요 ({count_str})\n" + "\n".join(lines))

    # 보고
    if reports:
        limit = 5
        lines = []
        for r in reports[:limit]:
            cat = r.get("category", "")
            desc = (r.get("summary") or "")[:50]
            created = r.get("created_at")
            date_str = ""
            if created:
                if isinstance(created, datetime):
                    date_str = created.strftime("%m/%d")
                else:
                    date_str = str(created)[:10]
            entry = f"- [{cat}] {desc}"
            if date_str:
                entry += f" -- {date_str} 접수"
            lines.append(entry)
        count_str = f"{len(reports)}건"
        if len(reports) > limit:
            count_str = f"{limit}건, 외 {len(reports) - limit}건"
        sections.append(f"[보고] 미해결 ({count_str})\n" + "\n".join(lines))

    # 뉴스
    if news:
        lines = [f"- {n}" for n in news[:5]]
        count_str = f"{len(news)}건"
        sections.append(f"[뉴스] ({count_str})\n" + "\n".join(lines))

    if not sections:
        return None

    return header + "\n\n" + "\n\n".join(sections)


def send_briefing(text: str) -> None:
    """Synology Chat 웹훅으로 브리핑 전송."""
    if not SYNOLOGY_CHAT_WEBHOOK_URL:
        logger.warning("SYNOLOGY_CHAT_WEBHOOK_URL not set")
        return

    try:
        httpx.post(
            SYNOLOGY_CHAT_WEBHOOK_URL,
            data={"payload": json.dumps({"text": text})},
            verify=False,
            timeout=10,
        )
        logger.info("Briefing sent to Synology Chat")
    except Exception as e:
        logger.error(f"Chat send failed: {e}")


def main():
    logger.info("Morning briefing started")

    since = datetime.now(KST) - timedelta(hours=24)

    # 데이터 수집 (각각 독립, 실패해도 계속)
    events = fetch_today_events() or None
    mails = fetch_important_mails() or None
    reports = fetch_open_reports() or None

    news_articles = fetch_news(since)
    news_lines = summarize_news(news_articles) if news_articles else None

    text = format_briefing(events, mails, reports, news_lines)

    if not text:
        logger.info("No data for briefing — skipping")
        return

    send_briefing(text)
    logger.info("Morning briefing complete")


if __name__ == "__main__":
    main()