import os
import json
import time
from pathlib import Path
from typing import List, Optional

import boto3
import cups
import yaml
from dotenv import load_dotenv
from loguru import logger

class Config:
    def __init__(self):
        load_dotenv()
        with open('config.yaml', 'r') as f:
            self.config = yaml.safe_load(f)

        # 環境変数で設定値を上書き
        self.config['s3']['bucket'] = os.getenv('S3_BUCKET_NAME', self.config['s3']['bucket'])
        self.config['s3']['prefix'] = self.config['s3']['prefix'].replace('${LOCATION}', os.getenv('LOCATION', ''))
        self.config['printer']['name'] = os.getenv('PRINTER_NAME', self.config['printer']['name'])

class S3Manager:
    def __init__(self, config: Config):
        self.config = config
        self.s3_client = boto3.client('s3')

    def list_files(self) -> List[str]:
        """S3バケットのファイル一覧を取得""" 
        try:
            files = []
            paginator = self.s3_client.get_paginator('list_objects_v2')
            for page in paginator.paginate(
                Bucket=self.config.config['s3']['bucket'],
                Prefix=self.config.config['s3']['prefix']
            ):
                if 'Contents' in page:
                    files.extend([obj['Key'] for obj in page['Contents']])
            return files
        except Exception as e:
            logger.error(f"S3ファイル一覧の取得に失敗: {e}")
            return []

    def download_file(self, key: str, local_path: str) -> bool:
        """S3からファイルをダウンロード""" 
        try:
            self.s3_client.download_file(
                self.config.config['s3']['bucket'],
                key,
                local_path
            )
            return True
        except Exception as e:
            logger.error(f"ファイルのダウンロードに失敗 {key}: {e}")
            return False

class PrinterManager:
    def __init__(self, config: Config):
        self.config = config
        self.conn = cups.Connection()

    def print_file(self, filepath: str) -> bool:
        """ファイルを印刷""" 
        printer_config = self.config.config['printer']
        max_attempts = printer_config['retry']['max_attempts']
        delay = printer_config['retry']['delay_seconds']

        for attempt in range(max_attempts):
            try:
                job_id = self.conn.printFile(
                    printer_config['name'],
                    filepath,
                    "Rogaining Score",
                    printer_config['options']
                )
                logger.info(f"印刷ジョブを送信: {filepath} (Job ID: {job_id})")
                return True
            except Exception as e:
                logger.error(f"印刷に失敗 (試行 {attempt + 1}/{max_attempts}): {e}")
                if attempt < max_attempts - 1:
                    time.sleep(delay)
                else:
                    return False

class FileManager:
    def __init__(self, config: Config):
        self.config = config
        self.file_log_path = Path(self.config.config['app']['save_path']) / self.config.config['app']['file_log']
        self.processed_files = self._load_processed_files()

    def _load_processed_files(self) -> List[str]:
        """処理済みファイルの一覧を読み込み""" 
        try:
            if self.file_log_path.exists():
                with open(self.file_log_path, 'r') as f:
                    return json.load(f)
            return []
        except Exception as e:
            logger.error(f"処理済みファイル一覧の読み込みに失敗: {e}")
            return []

    def save_processed_files(self):
        """処理済みファイルの一覧を保存""" 
        try:
            self.file_log_path.parent.mkdir(parents=True, exist_ok=True)
            with open(self.file_log_path, 'w') as f:
                json.dump(self.processed_files, f)
        except Exception as e:
            logger.error(f"処理済みファイル一覧の保存に失敗: {e}")

    def get_new_files(self, current_files: List[str]) -> List[str]:
        """新規ファイルを特定""" 
        return list(set(current_files) - set(self.processed_files))

def setup_logging(config: Config):
    """ロギングの設定""" 
    log_path = Path(config.config['app']['log_path'])
    log_path.mkdir(parents=True, exist_ok=True)

    logger.add(
        log_path / "app.log",
        rotation="1 day",
        retention="30 days",
        level="INFO" 
    )
    logger.add(
        log_path / config.config['app']['error_log'],
        level="ERROR" 
    )

def main():
    config = Config()
    setup_logging(config)

    s3_manager = S3Manager(config)
    printer_manager = PrinterManager(config)
    file_manager = FileManager(config)

    logger.info("スコアボード監視システムを開始")

    while True:
        try:
            # S3のファイル一覧を取得
            current_files = s3_manager.list_files()

            # 新規ファイルを特定
            new_files = file_manager.get_new_files(current_files)

            for file_key in new_files:
                if not file_key.endswith('.pdf'):
                    file_manager.processed_files.append(file_key)
                    continue

                # 保存先パスの設定
                local_path = Path(config.config['app']['save_path']) / Path(file_key).name
                local_path.parent.mkdir(parents=True, exist_ok=True)

                # ファイルのダウンロードと印刷
                if s3_manager.download_file(file_key, str(local_path)):
                    if printer_manager.print_file(str(local_path)):
                        file_manager.processed_files.append(file_key)
                        file_manager.save_processed_files()

            time.sleep(10)  # ポーリング間隔

        except Exception as e:
            logger.error(f"予期せぬエラーが発生: {e}")
            time.sleep(30)  # エラー時は長めの待機

if __name__ == "__main__":
    main()