import os
import time
import requests
from typing import Optional
from bot.logger import get_logger

logger = get_logger("uploader")
COOKIE_FILE = "cookies/cookies.txt"
HASHTAGS = "#movierecap #myanmar #fyp #viral #trending"


def _parse_sessionid(cookie_file: str) -> Optional[str]:
    """cookies.txt ဖိုင်ထဲမှ sessionid ကို ဖတ်ယူသည်"""
    try:
        with open(cookie_file, "r", encoding="utf-8") as f:
            for line in f:
                line = line.strip()
                if not line or line.startswith("#"):
                    continue
                parts = line.split("\t")
                if len(parts) >= 7 and parts[5] == "sessionid":
                    return parts[6]
                # Netscape format variation
                if "sessionid" in line:
                    for part in line.split():
                        if part.startswith("sessionid="):
                            return part.split("=", 1)[1].strip(";")
        logger.error("sessionid not found in cookies.txt")
        return None
    except FileNotFoundError:
        logger.error(f"Cookie file not found: {cookie_file}")
        return None
    except Exception as e:
        logger.error(f"Cookie parse error: {e}")
        return None


def upload_to_tiktok(video: dict, file_path: str) -> bool:
    """TikTok API (Upload endpoint) ကို ခေါ်ပြီး video တင်သည်"""
    sessionid = _parse_sessionid(COOKIE_FILE)
    if not sessionid:
        logger.error("Cannot upload: no sessionid")
        return False

    title = video["title"]
    caption = f"{title}\n{HASHTAGS}"

    headers = {
        "Cookie": f"sessionid={sessionid}",
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
        "Referer": "https://www.tiktok.com/",
    }

    # Step 1: Init upload
    init_url = "https://open.tiktokapis.com/v2/post/publish/inbox/video/init/"
    file_size = os.path.getsize(file_path)

    init_payload = {
        "source_info": {
            "source": "FILE_UPLOAD",
            "video_size": file_size,
            "chunk_size": file_size,
            "total_chunk_count": 1,
        }
    }

    try:
        resp = requests.post(init_url, json=init_payload, headers=headers, timeout=30)
        resp_data = resp.json()
        logger.debug(f"TikTok init response: {resp_data}")

        if resp_data.get("error", {}).get("code") != "ok":
            logger.error(f"TikTok init failed: {resp_data}")
            return False

        upload_url = resp_data["data"]["upload_url"]
        publish_id = resp_data["data"]["publish_id"]

        # Step 2: Upload video binary
        with open(file_path, "rb") as vf:
            video_bytes = vf.read()

        upload_headers = {
            **headers,
            "Content-Type": "video/mp4",
            "Content-Length": str(file_size),
            "Content-Range": f"bytes 0-{file_size-1}/{file_size}",
        }
        up_resp = requests.put(upload_url, data=video_bytes,
                               headers=upload_headers, timeout=300)
        if up_resp.status_code not in (200, 201, 206):
            logger.error(f"Upload PUT failed: {up_resp.status_code} {up_resp.text}")
            return False

        # Step 3: Publish
        pub_url = "https://open.tiktokapis.com/v2/post/publish/video/init/"
        pub_payload = {
            "post_info": {
                "title": caption[:2200],
                "privacy_level": "PUBLIC_TO_EVERYONE",
                "disable_duet": False,
                "disable_comment": False,
                "disable_stitch": False,
            },
            "source_info": {
                "source": "PULL_FROM_URL",
                "video_url": upload_url,
            }
        }
        pub_resp = requests.post(pub_url, json=pub_payload, headers=headers, timeout=30)
        pub_data = pub_resp.json()
        logger.debug(f"TikTok publish response: {pub_data}")

        if pub_data.get("error", {}).get("code") == "ok":
            logger.info(f"TikTok upload SUCCESS: '{title}' (publish_id={publish_id})")
            return True
        else:
            logger.error(f"TikTok publish failed: {pub_data}")
            return False

    except Exception as e:
        logger.error(f"TikTok upload exception: {e}")
        return False