import json
import os
import subprocess
import uuid
from config import TEMP_DIR

def extract_media_info(url, platform="tiktok"):
    """
    Menggunakan yt-dlp --dump-json untuk mengekstrak metadata video.
    """
    try:
        cmd = [
            "yt-dlp",
            "--dump-json",
            "--no-warnings",
            "--no-playlist",
            "--skip-download",
            url
        ]

        result = subprocess.run(cmd, capture_output=True, text=True, timeout=60)

        if result.returncode != 0:
            error_msg = result.stderr.strip() if result.stderr else "Unknown error"
            return {"error": True, "message": f"yt-dlp error: {error_msg}"}

        data = json.loads(result.stdout)

        return {
            "status": "success",
            "platform": platform,
            "raw_data": data
        }

    except subprocess.TimeoutExpired:
        return {"error": True, "message": "Request timeout: yt-dlp membutuhkan waktu terlalu lama."}
    except json.JSONDecodeError:
        return {"error": True, "message": "Gagal memparse response dari yt-dlp."}
    except Exception as e:
        return {"error": True, "message": f"Internal error: {str(e)}"}

def download_video(url):
    """
    Download video TikTok ke temp file.
    Return: (file_id, output_path) atau raise Exception.
    """
    file_id = str(uuid.uuid4())
    output_path = os.path.join(TEMP_DIR, f"{file_id}.mp4")

    cmd = [
        "yt-dlp",
        "--no-warnings",
        "--no-playlist",
        "-f", "bestvideo+bestaudio/best",
        "--merge-output-format", "mp4",
        "-o", output_path,
        url
    ]

    result = subprocess.run(cmd, capture_output=True, timeout=180)

    if result.returncode != 0:
        error_msg = result.stderr.decode(errors="ignore").strip()
        raise Exception(f"yt-dlp error: {error_msg}")

    if not os.path.exists(output_path):
        raise Exception("File tidak berhasil dibuat oleh yt-dlp.")

    return file_id, output_path