import asyncio
import base64
import datetime
import json
import logging
import os
import re
import shutil
import subprocess
import time
from typing import Optional

import requests
from bs4 import BeautifulSoup
from fake_useragent import UserAgent
from fastapi import FastAPI
from huggingface_hub import HfApi, create_repo, hf_hub_download, login

# ロギングの設定
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)


class Config:
    """設定用のクラス"""
    HUGGINGFACE_API_KEY = os.environ["HUGGINGFACE_API_KEY"]
    CIVITAI_API_TOKEN = os.environ["CIVITAI_API_TOKEN"]
    LOG_FILE = "civitai_backup.log"
    LIST_FILE = "model_list.log"
    REPO_IDS = {
        "log": "ttttdiva/CivitAI_log_test",
        "model_list": "ttttdiva/CivitAI_model_info_test",
        "current": ""
    }
    URLS = {
        "latest": "https://civitai.com/api/v1/models?sort=Newest",
        "modelPage": "https://civitai.com/models/",
        "modelId": "https://civitai.com/api/v1/models/",
        "modelVersionId": "https://civitai.com/api/v1/model-versions/",
        "hash": "https://civitai.com/api/v1/model-versions/by-hash/"
    }
    JST = datetime.timezone(datetime.timedelta(hours=9))
    UA = UserAgent()
    HEADERS = {
        'Authorization': f'Bearer {CIVITAI_API_TOKEN}',
        'User-Agent': 'civitai-crawler/1.0',
        "Content-Type": "application/json"
    }

    # ===== rclone 用の追加設定 =====
    RCLONE_CONF_BASE64 = os.environ.get("RCLONE_CONF_BASE64", "")
    # 暗号化されたファイルが出力されるローカルディレクトリ（cryptLocal: の実体）
    ENCRYPTED_DIR = "/home/user/app/encrypted"


class CivitAICrawler:
    """CivitAIからモデルをダウンロードし、Hugging Faceにアップロードするクラス"""

    def __init__(self, config: Config):
        self.config = config
        self.api = HfApi()
        self.app = FastAPI()
        self.repo_ids = self.config.REPO_IDS.copy()
        self.jst = self.config.JST

        # rclone のセットアップ
        self.setup_rclone_conf()

        self.setup_routes()

    def setup_routes(self):
        """FastAPIのルーティングを設定する。"""
        @self.app.get("/")
        def read_root():
            now = str(datetime.datetime.now(self.jst))
            description = f"""
            CivitAIを定期的に周回し新規モデルを {self.repo_ids['current']} にバックアップするSpaceです。
            model_list.log や civitai_backup.log は暗号化しないでアップロードします。
            モデルのフォルダやファイルは暗号化してアップロードします。
            Status: {now} + currently running :D
            """
            return description

        @self.app.on_event("startup")
        async def startup_event():
            asyncio.create_task(self.crawl())

    # =============================================================================
    # rclone の設定・暗号化アップロード処理
    # =============================================================================
    def setup_rclone_conf(self):
        """環境変数 RCLONE_CONF_BASE64 から rclone.conf を生成し、RCLONE_CONFIG 環境変数を設定"""
        if not self.config.RCLONE_CONF_BASE64:
            logger.warning("[WARN] RCLONE_CONF_BASE64 is empty. rclone may fail.")
            return

        os.makedirs(".rclone_config", exist_ok=True)
        conf_path = os.path.join(".rclone_config", "rclone.conf")
        with open(conf_path, "wb") as f:
            f.write(base64.b64decode(self.config.RCLONE_CONF_BASE64))

        os.environ["RCLONE_CONFIG"] = conf_path
        logger.info(f"[INFO] rclone.conf created at: {conf_path}")

    def encrypt_with_rclone(self, local_path: str):
        """
        local_path がフォルダかファイルかで処理を分け、暗号化（rclone copy or copyto）を行う。
        暗号化先は self.config.ENCRYPTED_DIR に生成される。
        """
        if not os.path.exists(local_path):
            raise FileNotFoundError(f"[ERROR] Local path not found: {local_path}")

        # 事前に暗号先ディレクトリをクリーンアップ
        if os.path.isdir(self.config.ENCRYPTED_DIR):
            shutil.rmtree(self.config.ENCRYPTED_DIR, ignore_errors=True)

        # ========= 1) local_path がフォルダの場合 =========
        if os.path.isdir(local_path):
            top_level_name = os.path.basename(local_path.rstrip("/")) or "unnamed"
            cmd = [
                "rclone", "copy",
                local_path,
                f"cryptLocal:{top_level_name}",
                "-v"
            ]
            logger.info(f"[INFO] Running: {' '.join(cmd)}")
            subprocess.run(cmd, check=True)

        # ========= 2) local_path がファイルの場合 =============
        else:
            filename = os.path.basename(local_path)
            # "rclone copyto <file> cryptLocal:<same_filename>" にすると
            # cryptLocal 側では1ファイルとして扱われる
            cmd = [
                "rclone", "copyto",
                local_path,
                f"cryptLocal:{filename}",
                "-v"
            ]
            logger.info(f"[INFO] Running: {' '.join(cmd)}")
            subprocess.run(cmd, check=True)

        logger.info(f"[OK] rclone => cryptLocal:")
        if not os.path.isdir(self.config.ENCRYPTED_DIR):
            raise FileNotFoundError(
                f"[ERROR] {self.config.ENCRYPTED_DIR} not found. Check rclone config."
            )

    def upload_encrypted_files(self, repo_id: str, base_path_in_repo: str = ""):
        """
        暗号化後の self.config.ENCRYPTED_DIR を走査し、
        すべてのファイルを1つずつアップロードする。
        
        （「最新バージョンのフォルダをまとめてアップロードするとき」は、1回だけこのメソッドを呼び出して
         フォルダ分のファイルを一括アップロード。
         old_versions でも 1ファイル暗号化後にこのメソッドを呼び出しているため、
         そこだけは引き続き個別ファイルのアップロードとなる。）
        """
        max_retries = 5
        for root, dirs, files in os.walk(self.config.ENCRYPTED_DIR):
            for fn in files:
                encrypted_file_path = os.path.join(root, fn)
                if not os.path.isfile(encrypted_file_path):
                    continue

                relative_path = os.path.relpath(encrypted_file_path, self.config.ENCRYPTED_DIR)
                upload_path_in_repo = os.path.join(base_path_in_repo, relative_path)

                attempt = 0
                while attempt < max_retries:
                    try:
                        self.api.upload_file(
                            path_or_fileobj=encrypted_file_path,
                            repo_id=repo_id,
                            path_in_repo=upload_path_in_repo
                        )
                        logger.info(f"[OK] Uploaded => {repo_id}/{upload_path_in_repo}")
                        break

                    except Exception as e:
                        attempt += 1
                        error_message = str(e)

                        # 429制限等のリトライロジック
                        if "rate-limited" in error_message and "minutes" in error_message:
                            match = re.search(r"in (\d+) minutes?", error_message)
                            if match:
                                minutes = int(match.group(1))
                                minutes += 1
                                logger.warning(f"Rate-limited. Waiting {minutes} minutes before retry...")
                                time.sleep(minutes * 60)
                                attempt -= 1
                                continue

                        if "you can retry this action in about 1 hour" in error_message:
                            logger.warning("Encountered 'retry in 1 hour' error. Waiting 1 hour before retrying...")
                            time.sleep(3600)
                            attempt -= 1
                            continue

                        if "over the limit of 100000 files" in error_message:
                            logger.warning("Repository file limit exceeded. Creating a new repository...")
                            self.repo_ids['current'] = self.increment_repo_name(self.repo_ids['current'])
                            self.api.create_repo(repo_id=self.repo_ids['current'], private=True)
                            attempt = 0
                            repo_id = self.repo_ids['current']
                            continue

                        # 上記以外のエラーの場合
                        if attempt < max_retries:
                            logger.warning(
                                f"Failed to upload {encrypted_file_path}, retry {attempt}/{max_retries}..."
                            )
                        else:
                            logger.error(
                                f"Failed to upload after {max_retries} attempts: {encrypted_file_path}"
                            )
                            raise

    @staticmethod
    def get_filename_from_cd(content_disposition: Optional[str], default_name: str) -> str:
        if content_disposition:
            parts = content_disposition.split(';')
            for part in parts:
                if "filename=" in part:
                    return part.split("=")[1].strip().strip('"')
        return default_name

    def download_file(self, url: str, destination_folder: str, default_name: str):
        try:
            response = requests.get(url, headers=self.config.HEADERS, stream=True)
            response.raise_for_status()
        except requests.RequestException as e:
            logger.error(f"Failed to download file from {url}: {e}")
            return

        filename = self.get_filename_from_cd(response.headers.get('content-disposition'), default_name)
        file_path = os.path.join(destination_folder, filename)

        with open(file_path, 'wb') as file:
            for chunk in response.iter_content(chunk_size=8192):
                file.write(chunk)
        logger.info(f"Download completed: {file_path}")

    def get_model_info(self, model_id: str) -> dict:
        try:
            response = requests.get(self.config.URLS["modelId"] + str(model_id), headers=self.config.HEADERS)
            response.raise_for_status()
            return response.json()
        except requests.RequestException as e:
            logger.error(f"Failed to retrieve model info for ID {model_id}: {e}")

    def download_model(self, model_versions: list, folder: str):
        """
        - 最新バージョンのファイルを「folder」へまとめてダウンロード
        - ここでは古いバージョンはダウンロードしない（後ほど old_versions にて個別にダウンロード）
        """
        latest_version = model_versions[0]
        latest_files = latest_version["files"]

        for file_info in latest_files:
            download_url = file_info["downloadUrl"]
            file_name = file_info["name"]
            login_detected_count = 0

            while login_detected_count < 5:
                try:
                    self.download_file(download_url, folder, file_name)
                except Exception as e:
                    logger.error(f"Exception occurred while downloading {file_name}: {e}")
                    login_detected_count += 1
                    continue

                if "login" in os.listdir(folder):
                    login_detected_count += 1
                    logger.warning(f"'login' file found. Will try again. ({login_detected_count}/5)")
                    os.remove(os.path.join(folder, "login"))
                else:
                    logger.info(f"Successfully downloaded {file_name}")
                    break

            if login_detected_count >= 5:
                dummy_file_name = f"{file_name}.download_failed"
                dummy_file_path = os.path.join(folder, dummy_file_name)
                try:
                    with open(dummy_file_path, "w") as f:
                        f.write("Download failed after 5 attempts.")
                    logger.error(f"Failed to download {file_name}. Created dummy file {dummy_file_name}. URL: {download_url}")
                except Exception as e:
                    logger.error(f"Failed to create dummy file for {file_name}: {e}")

    def download_old_version_file_and_upload(self, file_info, parent_folder: str, encrypted_top_name: str):
        """
        古いバージョンのファイルを1つダウンロード→暗号化アップロード→削除。
        old_versions フォルダの中に都度ファイルを落としてアップロード→削除する。
        """
        file_name = file_info["name"]
        download_url = file_info["downloadUrl"]

        # old_versions フォルダ作成
        old_versions_folder = os.path.join(parent_folder, "old_versions")
        os.makedirs(old_versions_folder, exist_ok=True)

        local_path = os.path.join(old_versions_folder, file_name)

        login_detected_count = 0
        while login_detected_count < 5:
            try:
                self.download_file(download_url, old_versions_folder, file_name)
            except Exception as e:
                logger.error(f"Exception while downloading old file {file_name}: {e}")
                login_detected_count += 1
                continue

            # 万が一 "login" という名前のファイルが出現したら削除して再試行
            if "login" in os.listdir(old_versions_folder):
                login_detected_count += 1
                logger.warning(f"'login' file found while downloading {file_name}. Retry {login_detected_count}/5.")
                os.remove(os.path.join(old_versions_folder, "login"))
            else:
                logger.info(f"Successfully downloaded old version file: {file_name}")
                break

        if login_detected_count >= 5:
            # 5回失敗した場合はダミーファイル化
            dummy_file_name = f"{file_name}.download_failed"
            dummy_file_path = os.path.join(old_versions_folder, dummy_file_name)
            try:
                with open(dummy_file_path, "w") as f:
                    f.write("Download failed after 5 attempts.")
                logger.error(f"Failed to download {file_name} -> created dummy: {dummy_file_name}")
            except Exception as e:
                logger.error(f"Failed to create dummy file for old version {file_name}: {e}")
            return

        # ここから暗号化→アップロード→削除 （1ファイルずつ処理を繰り返す）
        try:
            # 1) 単ファイルを暗号化
            self.encrypt_with_rclone(local_path)

            # 2) アップロード
            self.upload_encrypted_files(
                repo_id=self.repo_ids["current"],
                base_path_in_repo=f"{encrypted_top_name}/old_versions"
            )
            logger.info(f"Uploaded old version file: {file_name} into {encrypted_top_name}")

        except Exception as e:
            logger.error(f"Error uploading old version file {file_name}: {e}")

        # 3) ローカルの平文ファイルを削除
        if os.path.exists(local_path):
            os.remove(local_path)
            logger.info(f"Removed local old version file: {local_path}")

    def download_images(self, model_versions: list, folder: str):
        images_folder = os.path.join(folder, "images")
        os.makedirs(images_folder, exist_ok=True)

        images = []
        for version in model_versions:
            for img in version.get("images", []):
                image_url = img["url"]
                images.append(image_url)

        for image_url in images:
            image_name = image_url.split("/")[-1]
            try:
                response = requests.get(image_url)
                response.raise_for_status()
                with open(os.path.join(images_folder, f"{image_name}.png"), "wb") as file:
                    file.write(response.content)
            except requests.RequestException as e:
                logger.error(f"Error downloading image {image_url}: {e}")

    def save_html_content(self, url: str, folder: str):
        try:
            response = requests.get(url)
            response.raise_for_status()
            html_path = os.path.join(folder, f"{folder}.html")
            with open(html_path, 'w', encoding='utf-8') as file:
                file.write(response.text)
        except Exception as e:
            logger.error(f"Error saving HTML content for URL {url}: {e}")

    @staticmethod
    def save_model_info(model_info: dict, folder: str):
        with open(os.path.join(folder, "model_info.json"), "w") as file:
            json.dump(model_info, file, indent=2)

    @staticmethod
    def increment_repo_name(repo_id: str) -> str:
        match = re.search(r'(\d+)$', repo_id)
        if match:
            number = int(match.group(1)) + 1
            return re.sub(r'\d+$', str(number), repo_id)
        else:
            return f"{repo_id}1"

    # =============================================================================
    # ログ類のアップロード（生ファイル）
    # =============================================================================
    def upload_file_raw(
        self,
        file_path: str,
        repo_id: Optional[str] = None,
        path_in_repo: Optional[str] = None
    ):
        if repo_id is None:
            repo_id = self.repo_ids['current']
        if path_in_repo is None:
            path_in_repo = os.path.basename(file_path)

        max_retries = 5
        attempt = 0
        while attempt < max_retries:
            try:
                self.api.upload_file(
                    path_or_fileobj=file_path,
                    repo_id=repo_id,
                    path_in_repo=path_in_repo
                )
                logger.info(f"[OK] Uploaded {file_path} => {repo_id}/{path_in_repo}")
                return
            except Exception as e:
                attempt += 1
                error_message = str(e)
                if "over the limit of 100000 files" in error_message:
                    logger.warning("Repository file limit exceeded, creating a new repository.")
                    self.repo_ids['current'] = self.increment_repo_name(self.repo_ids['current'])
                    self.api.create_repo(repo_id=self.repo_ids['current'], private=True)
                    attempt = 0
                    repo_id = self.repo_ids['current']
                    continue
                elif "you can retry this action in about 1 hour" in error_message:
                    logger.warning("Encountered 'retry in 1 hour' error. Waiting 1 hour before retrying...")
                    time.sleep(3600)
                    attempt -= 1
                else:
                    if attempt < max_retries:
                        logger.warning(f"Failed to upload raw file {file_path}, retry {attempt}/{max_retries}...")
                    else:
                        logger.error(f"Failed to upload raw file after {max_retries} attempts: {file_path}")
                        raise

    # =============================================================================
    # フォルダ全体をまとめて暗号化してアップロード
    # =============================================================================
    def upload_folder_encrypted(
        self,
        folder_path: str,
        repo_id: Optional[str] = None,
        path_in_repo: Optional[str] = None
    ) -> str:
        """
        指定フォルダを暗号化し、暗号化後のファイルを一括アップロードする。
        戻り値: 暗号化されたトップレベルフォルダ名
        """
        if repo_id is None:
            repo_id = self.repo_ids['current']
        base_path = path_in_repo or ""

        # 1) 全体を一度に暗号化
        self.encrypt_with_rclone(folder_path)

        # 2) 暗号化後フォルダ名を取得し、一括アップロード
        top_levels = [
            d for d in os.listdir(self.config.ENCRYPTED_DIR)
            if os.path.isdir(os.path.join(self.config.ENCRYPTED_DIR, d))
        ]
        if not top_levels:
            raise RuntimeError("No top-level folder found after rclone encryption.")
        if len(top_levels) > 1:
            logger.warning(f"Multiple top-level folders found after encryption? {top_levels}. Using the first one.")

        encrypted_top_name = top_levels[0]
        self.upload_encrypted_files(repo_id=repo_id, base_path_in_repo=base_path)

        # 3) 暗号化用ディレクトリをクリーンアップ
        if os.path.isdir(self.config.ENCRYPTED_DIR):
            shutil.rmtree(self.config.ENCRYPTED_DIR, ignore_errors=True)

        return encrypted_top_name

    # =============================================================================
    # メイン処理：最新バージョンは「フォルダ一括」アップロード、old_versions は1ファイルずつ
    # =============================================================================
    def process_model(self, model_url: str):
        """
        1) 最新バージョン → フォルダにまとめてダウンロードし、1回だけ暗号化&アップロード
        2) old_versions → 1ファイルずつダウンロード→暗号化アップロード→削除
        """
        try:
            model_id = model_url.rstrip("/").split("/")[-1]
            model_info = self.get_model_info(model_id)
            if not model_info:
                logger.warning(f"Cannot get model info: {model_id}")
                return

            model_versions = model_info.get("modelVersions", [])
            if not model_versions:
                logger.warning(f"No versions found for model ID {model_id}")
                return

            # === フォルダ名決定（最新バージョンのファイル名から取得） ===
            latest_version = model_versions[0]
            model_file = next(
                (file for file in latest_version["files"] if file.get('type') == 'Model'),
                None
            )
            if model_file:
                latest_filename = model_file['name']
                folder = os.path.splitext(latest_filename)[0]
            else:
                # type='Model' がなければ最初のファイルを基準に
                first_file = latest_version["files"][0]
                latest_filename = first_file['name']
                folder = os.path.splitext(latest_filename)[0]
                logger.warning(f"No 'Model' type file found for model ID {model_id}. Using first file's name.")

            # ダウンロード先フォルダ作成
            os.makedirs(folder, exist_ok=True)

            # === 最新バージョンをまとめてダウンロード ===
            self.download_model(model_versions, folder)
            self.download_images(model_versions, folder)
            self.save_html_content(self.config.URLS["modelPage"] + str(model_id), folder)
            self.save_model_info(model_info, folder)

            # === フォルダごと暗号化→アップロード ===
            encrypted_top_name = self.upload_folder_encrypted(folder)
            logger.info(f"[MAIN] Uploaded latest version folder => {encrypted_top_name}")

            # ローカルのフォルダ削除
            shutil.rmtree(folder, ignore_errors=True)

            # === 古いバージョンは1つずつアップロード ===
            if len(model_versions) > 1:
                # 旧バージョンだけ個別ファイル処理
                for version in model_versions[1:]:
                    for file_info in version["files"]:
                        # old_versions フォルダに落としてアップロード
                        self.download_old_version_file_and_upload(file_info, folder, encrypted_top_name)

            # === model_list.log への追加など後処理 ===
            modelpage_name = model_info.get("name", f"Model_{model_id}")
            model_hf_url = f"https://huggingface.co/{self.repo_ids['current']}/tree/main/{encrypted_top_name}"

            with open(self.config.LIST_FILE, "a", encoding="utf-8") as f:
                f.write(f"{modelpage_name}: {model_hf_url}\n")

        except Exception as e:
            logger.error(f"Unexpected error in process_model ({model_url}): {e}")

    # =============================================================================
    # 定期巡回して新しいモデルがあれば処理する
    # =============================================================================
    async def crawl(self):
        """モデルを定期的にチェックし、更新を行う。"""
        while True:
            try:
                # HuggingFaceログイン
                login(token=self.config.HUGGINGFACE_API_KEY, add_to_git_credential=True)

                # 既存の model_list.log & civitai_backup.log を取得してローカルへ
                model_list_path = hf_hub_download(repo_id=self.repo_ids['model_list'], filename=self.config.LIST_FILE)
                shutil.copyfile(model_list_path, f"./{self.config.LIST_FILE}")

                local_file_path = hf_hub_download(repo_id=self.repo_ids["log"], filename=self.config.LOG_FILE)
                shutil.copyfile(local_file_path, f"./{self.config.LOG_FILE}")

                # ログ読み込み
                with open(self.config.LOG_FILE, "r", encoding="utf-8") as file:
                    lines = file.read().splitlines()
                    old_models = json.loads(lines[0]) if len(lines) > 0 else []
                    self.repo_ids["current"] = lines[1] if len(lines) > 1 else ""

                # 新着モデル確認
                response = requests.get(self.config.URLS["latest"], headers=self.config.HEADERS)
                response.raise_for_status()
                latest_models = response.json().get("items", [])
                latest_model_ids = [item.get("id") for item in latest_models if "id" in item]

                # 増分チェック
                new_models = list(set(latest_model_ids) - set(old_models))

                if new_models:
                    logger.info(f"New models found: {new_models}")
                    model_id = new_models[0]

                    for attempt in range(1, 6):
                        try:
                            self.process_model(f"{self.config.URLS['modelId']}{model_id}")
                            break
                        except Exception as e:
                            logger.error(f"Failed to process model ID {model_id} (Attempt {attempt}/5): {e}")
                            if attempt == 5:
                                logger.error(f"Skipping model ID {model_id} after 5 failed attempts.")
                            else:
                                await asyncio.sleep(2)
                else:
                    # 新モデルなし
                    with open(self.config.LOG_FILE, "w", encoding="utf-8") as f:
                        f.write(json.dumps(latest_model_ids) + "\n")
                        f.write(f"{self.repo_ids['current']}\n")
                    logger.info(f"Updated log file: {self.config.LOG_FILE}")

                    self.upload_file_raw(
                        file_path=self.config.LOG_FILE,
                        repo_id=self.repo_ids["log"],
                        path_in_repo=self.config.LOG_FILE
                    )
                    logger.info("Uploaded log file to repository (unencrypted).")

                    logger.info("No new models found.")
                    await asyncio.sleep(60)
                    continue

                # 追加したモデルIDを old_models に追加
                old_models.append(model_id)

                # ログファイル更新
                with open(self.config.LOG_FILE, "w", encoding="utf-8") as f:
                    f.write(json.dumps(old_models) + "\n")
                    f.write(f"{self.repo_ids['current']}\n")
                logger.info(f"Updated log file with new model ID: {model_id}")

                # ログとmodel_list.logをアップロード (暗号化しない)
                self.upload_file_raw(
                    file_path=self.config.LOG_FILE,
                    repo_id=self.repo_ids["log"],
                    path_in_repo=self.config.LOG_FILE
                )
                self.upload_file_raw(
                    file_path=self.config.LIST_FILE,
                    repo_id=self.repo_ids["model_list"],
                    path_in_repo=self.config.LIST_FILE
                )

            except Exception as e:
                logger.error(f"Error during crawling: {e}")
                await asyncio.sleep(300)


# 実行
config = Config()
crawler = CivitAICrawler(config)
app = crawler.app