import os
import re
import time
import json
import subprocess
import requests
from datetime import datetime, timezone
from bs4 import BeautifulSoup

# ===== Channel.io 設定 =====
GET_URL = "https://desk-api.channel.io/desk/channels/200605/groups/519217/messages"
POST_URL = GET_URL

PARAMS = {
    "sortOrder": "desc",
    "limit": 36,
    "logFolded": "false",
}

X_ACCOUNT = os.getenv("channeliotokenbot2")
if not X_ACCOUNT:
    raise RuntimeError("環境変数 channeliotokenokenbot2 が設定されていません")

HEADERS_GET = {
    "accept": "application/json",
    "accept-language": "ja",
    "x-account": X_ACCOUNT,
}

HEADERS_POST = {
    "accept": "application/json",
    "accept-language": "ja",
    "content-type": "application/json",
    "x-account": X_ACCOUNT,
}

# ===== ssyoutube =====
SSYOUTUBE_URL = "https://ssyoutube.online/yt-video-detail/"

# ===== tfLink クライアント =====
from tflink import TFLinkClient

tf_client = TFLinkClient()  # 匿名アップロード

# ===== Utils =====
def parse_updated_at(value):
    if isinstance(value, (int, float)):
        return datetime.fromtimestamp(value / 1000, tz=timezone.utc)
    elif isinstance(value, str):
        return datetime.fromisoformat(value.replace("Z", "+00:00"))
    return None

def extract_youtube_id(text):
    patterns = [
        r"v=([A-Za-z0-9_-]{11})",
        r"youtu\.be/([A-Za-z0-9_-]{11})",
    ]
    for p in patterns:
        m = re.search(p, text)
        if m:
            return m.group(1)
    return None

# ===== ssyoutube HTML 解析 =====
def fetch_download_links(youtube_url):
    res = requests.post(
        SSYOUTUBE_URL,
        data={"videoURL": youtube_url},
        timeout=30,
        headers={
            "User-Agent": "Mozilla/5.0",
            "Referer": "https://ssyoutube.online/",
        }
    )
    res.raise_for_status()

    soup = BeautifulSoup(res.text, "lxml")
    buttons = soup.select("button[data-url]")

    results = []
    for btn in buttons:
        url = btn.get("data-url")
        quality = btn.get("data-quality")
        has_audio = btn.get("data-has-audio")

        if not url:
            continue

        results.append({
            "url": url,
            "quality": quality,
            "has_audio": has_audio,
        })

    return results

# ===== 動画と音声の選別 =====
def choose_best_streams(items):
    video_only = []
    audio_only = []

    for item in items:
        url = item["url"]
        quality = item["quality"] or ""
        has_audio = item["has_audio"]

        if url.endswith(".m4a") or "audio" in quality.lower():
            audio_only.append(item)
        else:
            video_only.append(item)

    if not video_only:
        video = None
    else:
        video = sorted(video_only,
                       key=lambda x: int(re.sub(r"[^\d]", "", x["quality"] or "0")),
                       reverse=True)[0]

    if not audio_only:
        audio = None
    else:
        audio = sorted(audio_only,
                       key=lambda x: int(re.sub(r"[^\d]", "", x["quality"] or "0")),
                       reverse=True)[0]

    return video, audio


# ===== 結合 =====
def merge_video_audio(video_url, audio_url, out_file):
    cmd = [
        "ffmpeg", "-y",
        "-i", video_url,
        "-i", audio_url,
        "-c", "copy",
        out_file,
    ]
    result = subprocess.run(cmd, capture_output=True)
    if result.returncode != 0:
        print("FFmpeg merge error:", result.stderr.decode())
        return False
    return True

# ===== tfLink アップロード =====
def upload_to_tflink(file_path):
    res = tf_client.upload(file_path)
    return res.download_link

def build_links(items, upload_link):
    lines = []
    for item in items:
        url = item["url"]
        quality = item["quality"]
        line = f'<link type="url" value="{url}"> {quality}</link>'
        lines.append(line)

    lines.append(f"結合ファイルダウンロード: {upload_link}")
    return "\n".join(lines)

def send_to_channel(text):
    payload = {
        "requestId": f"desk-web-{int(time.time() * 1000)}",
        "blocks": [
            {
                "type": "text",
                "value": text
            }
        ],
        "buttons": None,
        "form": None,
        "webPage": None,
        "files": None,
        "customPayload": None
    }

    res = requests.post(
        POST_URL,
        headers=HEADERS_POST,
        data=json.dumps(payload),
        timeout=30
    )
    res.raise_for_status()

# ===== Main =====
def main():
    while True:
        try:
            res = requests.get(
                GET_URL,
                headers=HEADERS_GET,
                params=PARAMS,
                timeout=30,
            )
            res.raise_for_status()

            messages = res.json().get("messages", [])
            latest_msg = None
            latest_time = None

            for msg in messages:
                plain_text = msg.get("plainText")
                updated_at = msg.get("updatedAt")

                if not plain_text or updated_at is None:
                    continue

                t = parse_updated_at(updated_at)
                if not t:
                    continue

                if latest_time is None or t > latest_time:
                    latest_time = t
                    latest_msg = msg

            if not latest_msg:
                time.sleep(10)
                continue

            text = latest_msg["plainText"]
            youtube_id = extract_youtube_id(text)
            if not youtube_id:
                time.sleep(10)
                continue

            youtube_url = f"https://www.youtube.com/watch?v={youtube_id}"

            items = fetch_download_links(youtube_url)
            if not items:
                time.sleep(10)
                continue

            video_stream, audio_stream = choose_best_streams(items)
            if not video_stream or not audio_stream:
                print("映像または音声ストリームが足りません")
                time.sleep(10)
                continue

            # ダウンロードして結合
            temp_video = "video.mp4"
            temp_audio = "audio.mp4"
            merged = "merged_output.mp4"

            # ダウンロード
            with requests.get(video_stream["url"], stream=True) as r:
                with open(temp_video, "wb") as f:
                    for chunk in r.iter_content(chunk_size=8192):
                        f.write(chunk)
            with requests.get(audio_stream["url"], stream=True) as r:
                with open(temp_audio, "wb") as f:
                    for chunk in r.iter_content(chunk_size=8192):
                        f.write(chunk)

            if not merge_video_audio(temp_video, temp_audio, merged):
                print("結合失敗")
                time.sleep(10)
                continue

            # tfLink アップロード
            upload_link = upload_to_tflink(merged)

            message_text = build_links(items, upload_link)
            send_to_channel(message_text)
            print("送信完了")

        except Exception as e:
            print("エラー:", e)

        time.sleep(15)

if __name__ == "__main__":
    main()

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