import httpx
import hashlib
import logging
import os
import asyncio
import time
import json
from datetime import datetime, timezone
from pathlib import Path
from huggingface_hub import HfApi
from fastapi import HTTPException

logger = logging.getLogger(__name__)
REC_DIR = Path("/app/recordings")
REC_DIR.mkdir(parents=True, exist_ok=True)

def md5_name(source_id, title, start_ts):
    return hashlib.md5(f"{source_id}_{title}_{start_ts}".encode()).hexdigest() + ".ts"

def to_seconds(ts):
    return int(ts / 1000) if isinstance(ts, (int, float)) and ts > 1e12 else int(ts)

def to_milliseconds(ts):
    return int(ts * 1000) if isinstance(ts, (int, float)) and ts < 1e12 else int(ts)

class BaseAdapter:
    def __init__(self, url, api_key, source_id):
        self.base_url = url.rstrip("/")
        self.api_key = api_key
        self.source_id = source_id
        self.headers = {}
        if api_key:
            if "Bearer" in api_key:
                self.headers["Authorization"] = api_key
            else:
                self.headers["Authorization"] = f"Bearer {api_key}"
    async def get_epg(self, hours=24):
        raise NotImplementedError
    async def schedule_record(self, channel_id, start_ts, end_ts, title):
        raise NotImplementedError
    async def wait_and_download(self, record_id, start_ts, end_ts, title, dataset_repo, hf_token, on_progress=None):
        raise NotImplementedError
    async def _download_file(self, url, save_path, headers=None, on_progress=None):
        async with httpx.AsyncClient(timeout=300.0, verify=False) as client:
            async with client.stream("GET", url, headers=headers or self.headers) as res:
                res.raise_for_status()
                total = int(res.headers.get("content-length", 0))
                downloaded = 0
                with open(save_path, "wb") as f:
                    async for chunk in res.aiter_bytes(65536):
                        f.write(chunk)
                        downloaded += len(chunk)
                        if on_progress and total:
                            on_progress(downloaded / total)
    async def _upload_to_dataset(self, local_path, md5_filename, original_name, repo_id, token):
        if not token or not os.path.exists(local_path):
            return
        try:
            api = HfApi()
            await asyncio.to_thread(
                api.upload_file,
                path_or_fileobj=local_path,
                path_in_repo=md5_filename,
                repo_id=repo_id,
                repo_type="dataset",
                commit_message=f"Upload: {original_name}",
                token=token
            )
            os.remove(local_path)
            logger.info(f"Uploaded {original_name} to {repo_id}")
        except Exception as e:
            logger.error(f"Upload failed: {e}")

class EPGStationAdapter(BaseAdapter):
    async def get_epg(self, hours=24):
        now = int(time.time() * 1000)
        end = now + hours * 3600 * 1000
        url = f"{self.base_url}/api/schedules"
        logger.info(f"EPGStation: GET {url} (startAt={now}, endAt={end})")
        try:
            async with httpx.AsyncClient(timeout=60.0, verify=False) as c:
                res = await c.get(
                    url,
                    headers=self.headers,
                    params={
                        "startAt": now,
                        "endAt": end,
                        "isHalfWidth": "true",
                        "GR": "true",
                        "BS": "true",
                        "CS": "true",
                        "SKY": "true"
                    }
                )
                logger.info(f"EPGStation: Response status={res.status_code}")
                if res.status_code != 200:
                    logger.error(f"EPGStation API error {res.status_code}: {res.text[:300]}")
                    return []
                try:
                    schedules = res.json()
                except json.JSONDecodeError as e:
                    logger.error(f"EPGStation: Invalid JSON: {res.text[:200]}")
                    return []
                if not isinstance(schedules, list):
                    logger.warning(f"EPGStation: Expected list, got {type(schedules)}")
                    return []
                result = []
                for sch in schedules:
                    channel = sch.get("channel", {})
                    cid = str(channel.get("id", ""))
                    cname = channel.get("name") or channel.get("displayName") or "Unknown"
                    for p in sch.get("programs", []):
                        result.append({
                            "id": str(p.get("id", "")),
                            "title": p.get("name", "Unknown"),
                            "start": to_seconds(p.get("startAt", 0)),
                            "end": to_seconds(p.get("endAt", 0)),
                            "channel_id": cid,
                            "channel_name": cname,
                            "description": p.get("description", ""),
                            "extended": p.get("extended", "")
                        })
                logger.info(f"EPGStation: Fetched {len(result)} programs")
                return result
        except httpx.ConnectError as e:
            logger.error(f"EPGStation: Connection failed - {str(e)}")
            raise HTTPException(503, f"Cannot connect to EPGStation: {self.base_url}")
        except httpx.TimeoutException as e:
            logger.error(f"EPGStation: Request timeout - {str(e)}")
            raise HTTPException(504, "EPGStation request timeout")
        except Exception as e:
            logger.error(f"EPGStation: Unexpected error - {type(e).__name__}: {str(e)}", exc_info=True)
            raise HTTPException(500, f"EPG fetch failed: {str(e)}")
    async def schedule_record(self, channel_id, start_ts, end_ts, title):
        start_ms = to_milliseconds(start_ts)
        end_ms = to_milliseconds(end_ts)
        payload = {
            "programId": None,
            "timeSpecifiedOption": {
                "name": title,
                "channelId": int(channel_id) if str(channel_id).isdigit() else channel_id,
                "startAt": start_ms,
                "endAt": end_ms
            },
            "allowEndLack": True,
            "tags": [],
            "saveOption": {"parentDirectoryName": "", "directory": "", "recordedFormat": ""},
            "encodeOption": {"mode1": None, "mode2": None, "mode3": None, "isDeleteOriginalAfterEncode": False}
        }
        async with httpx.AsyncClient(timeout=30.0, verify=False) as c:
            res = await c.post(f"{self.base_url}/api/reserves", json=payload, headers=self.headers)
            if res.status_code == 200:
                return str(res.json().get("reserveId", ""))
            return ""
    async def wait_and_download(self, reserve_id, start_ts, end_ts, title, dataset_repo, hf_token, on_progress=None):
        wait_until = end_ts + 300
        while time.time() < wait_until:
            await asyncio.sleep(60)
            async with httpx.AsyncClient(timeout=30.0, verify=False) as c:
                res = await c.get(f"{self.base_url}/api/recorded", headers=self.headers, params={"limit": 100})
                if res.status_code == 200:
                    items = res.json()
                    for item in items:
                        if item.get("reserveId") == reserve_id or item.get("programId") == reserve_id:
                            recorded_id = item.get("id")
                            video_url = f"{self.base_url}/api/videos/{recorded_id}/stream"
                            save_path = str(REC_DIR / md5_name(self.source_id, title, start_ts))
                            await self._download_file(video_url, save_path, on_progress=on_progress)
                            await self._upload_to_dataset(save_path, os.path.basename(save_path), title, dataset_repo, hf_token)
                            return True
        return False

class KonomiTVAdapter(BaseAdapter):
    async def _get_headers(self):
        headers = {}
        if self.api_key:
            if "Bearer" in self.api_key:
                headers["Authorization"] = self.api_key
            else:
                headers["Authorization"] = f"Bearer {self.api_key}"
        return headers
    async def get_epg(self, hours=24):
        try:
            async with httpx.AsyncClient(timeout=60.0, verify=False) as c:
                res = await c.get(
                    f"{self.base_url}/api/programs",
                    headers=self._get_headers(),
                    params={"limit": 500}
                )
                if res.status_code != 200:
                    logger.error(f"KonomiTV API error {res.status_code}: {res.text[:200]}")
                    return []
                programs = res.json()
                if not isinstance(programs, list):
                    return []
                result = []
                for p in programs:
                    channel = p.get("channel", {})
                    result.append({
                        "id": str(p.get("id", "")),
                        "title": p.get("title", "Unknown"),
                        "start": to_seconds(p.get("start_at", 0)),
                        "end": to_seconds(p.get("end_at", 0)),
                        "channel_id": str(channel.get("id", "")),
                        "channel_name": channel.get("name") or channel.get("display_name") or "Unknown",
                        "description": p.get("description", ""),
                        "extended": p.get("extended", "")
                    })
                logger.info(f"Fetched {len(result)} programs from KonomiTV")
                return result
        except httpx.ConnectError as e:
            logger.error(f"Connection failed to {self.base_url}: {str(e)}")
            return []
        except httpx.TimeoutException as e:
            logger.error(f"Request timeout: {str(e)}")
            return []
        except Exception as e:
            logger.error(f"EPG fetch error: {type(e).__name__} - {str(e)}")
            return []
    async def schedule_record(self, channel_id, start_ts, end_ts, title):
        start_sec = to_seconds(start_ts)
        end_sec = to_seconds(end_ts)
        payload = {
            "channel_id": int(channel_id) if str(channel_id).isdigit() else channel_id,
            "start_at": start_sec,
            "end_at": end_sec,
            "name": title
        }
        async with httpx.AsyncClient(timeout=30.0, verify=False) as c:
            res = await c.post(
                f"{self.base_url}/api/reservations",
                json=payload,
                headers=self._get_headers()
            )
            if res.status_code in (200, 201):
                return str(res.json().get("id", ""))
            return ""
    async def wait_and_download(self, reservation_id, start_ts, end_ts, title, dataset_repo, hf_token, on_progress=None):
        wait_until = end_ts + 300
        while time.time() < wait_until:
            await asyncio.sleep(60)
            async with httpx.AsyncClient(timeout=30.0, verify=False) as c:
                res = await c.get(
                    f"{self.base_url}/api/reservations/{reservation_id}",
                    headers=self._get_headers()
                )
                if res.status_code == 200:
                    data = res.json()
                    if data.get("is_completed"):
                        file_path = data.get("file_path")
                        if file_path:
                            stream_url = f"{self.base_url}/api/recordings/{reservation_id}/stream"
                            save_path = str(REC_DIR / md5_name(self.source_id, title, start_ts))
                            await self._download_file(stream_url, save_path, on_progress=on_progress)
                            await self._upload_to_dataset(save_path, os.path.basename(save_path), title, dataset_repo, hf_token)
                            return True
        return False

class MirakurunAdapter(BaseAdapter):
    async def get_epg(self, hours=24):
        now = int(datetime.now(timezone.utc).timestamp())
        try:
            async with httpx.AsyncClient(timeout=30.0, verify=False) as c:
                res = await c.get(
                    f"{self.base_url}/api/programs",
                    headers=self.headers,
                    params={"startAt": now, "endAt": now + hours*3600}
                )
                if res.status_code != 200:
                    return []
                items = res.json()
                return [{
                    "id": str(p["id"]),
                    "title": p.get("name", "Unknown"),
                    "start": p.get("startAt", 0),
                    "end": p.get("endAt", 0),
                    "channel_id": str(p.get("channelId", "")),
                    "channel_name": p.get("channelName", "Unknown")
                } for p in items]
        except:
            return []
    async def schedule_record(self, channel_id, start_ts, end_ts, title):
        try:
            async with httpx.AsyncClient(timeout=30.0, verify=False) as c:
                res = await c.post(
                    f"{self.base_url}/api/reserves",
                    json={"channelType": "GR", "channel": channel_id, "startAt": int(start_ts), "endAt": int(end_ts)},
                    headers=self.headers
                )
                return str(res.json().get("id", "")) if res.status_code == 200 else ""
        except:
            return ""
    async def wait_and_download(self, reserve_id, start_ts, end_ts, title, dataset_repo, hf_token, on_progress=None):
        await asyncio.sleep(max(end_ts - time.time() + 300, 0))
        async with httpx.AsyncClient(timeout=30.0, verify=False) as c:
            res = await c.get(f"{self.base_url}/api/recorded/{reserve_id}", headers=self.headers)
            if res.status_code == 200:
                video_url = f"{self.base_url}/api/recorded/{reserve_id}/stream.mp4"
                save_path = str(REC_DIR / md5_name(self.source_id, title, start_ts))
                await self._download_file(video_url, save_path, on_progress=on_progress)
                await self._upload_to_dataset(save_path, os.path.basename(save_path), title, dataset_repo, hf_token)
                return True
        return False

class EDCBAdapter(BaseAdapter):
    async def get_epg(self, hours=24):
        now = int(datetime.now(timezone.utc).timestamp())
        try:
            async with httpx.AsyncClient(timeout=30.0, verify=False) as c:
                res = await c.get(
                    f"{self.base_url}/api/programs",
                    headers=self.headers,
                    params={"startAt": now, "endAt": now + hours*3600}
                )
                if res.status_code != 200:
                    return []
                items = res.json()
                return [{
                    "id": str(p["id"]),
                    "title": p.get("title", "Unknown"),
                    "start": p.get("startTime", 0),
                    "end": p.get("endTime", 0),
                    "channel_id": str(p.get("channelID", "")),
                    "channel_name": p.get("channelName", "Unknown")
                } for p in items]
        except:
            return []
    async def schedule_record(self, channel_id, start_ts, end_ts, title):
        try:
            async with httpx.AsyncClient(timeout=30.0, verify=False) as c:
                res = await c.post(
                    f"{self.base_url}/api/reserve",
                    json={"channelID": channel_id, "startTime": int(start_ts), "endTime": int(end_ts), "recMode": 4},
                    headers=self.headers
                )
                return str(res.json().get("id", "")) if res.status_code == 200 else ""
        except:
            return ""
    async def wait_and_download(self, reserve_id, start_ts, end_ts, title, dataset_repo, hf_token, on_progress=None):
        await asyncio.sleep(max(end_ts - time.time() + 300, 0))
        async with httpx.AsyncClient(timeout=30.0, verify=False) as c:
            res = await c.get(f"{self.base_url}/api/recfile/{reserve_id}", headers=self.headers)
            if res.status_code == 200:
                save_path = str(REC_DIR / md5_name(self.source_id, title, start_ts))
                await self._download_file(str(res.url), save_path, on_progress=on_progress)
                await self._upload_to_dataset(save_path, os.path.basename(save_path), title, dataset_repo, hf_token)
                return True
        return False

async def start_local_stream_record(stream_url, start_ts, end_ts, title, source_id, dataset_repo, hf_token, on_progress=None):
    duration = max(int(end_ts - start_ts), 60)
    filename = md5_name(source_id, title, start_ts)
    save_path = str(REC_DIR / filename)
    proc = await asyncio.create_subprocess_exec(
        "ffmpeg", "-y", "-hide_banner", "-loglevel", "error",
        "-i", stream_url, "-t", str(duration), "-c", "copy", "-f", "mpegts", save_path,
        stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE
    )
    async def monitor():
        while proc.returncode is None:
            await asyncio.sleep(2)
            if os.path.exists(save_path) and on_progress:
                size = os.path.getsize(save_path)
                on_progress(min(size / (duration * 100000), 1.0))
    asyncio.create_task(monitor())
    await proc.wait()
    if proc.returncode == 0 and os.path.exists(save_path):
        adapter = BaseAdapter("", "", "")
        await adapter._upload_to_dataset(save_path, filename, title, dataset_repo, hf_token)
        return True
    return False

def get_adapter(source_type, url, api_key, source_id):
    mapping = {
        "epgstation": EPGStationAdapter,
        "mirakurun": MirakurunAdapter,
        "konomitv": KonomiTVAdapter,
        "edcb": EDCBAdapter
    }
    cls = mapping.get(source_type.lower(), EPGStationAdapter)
    return cls(url, api_key, source_id)