#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
OCR 快取管理路由

Author: PANJIT IT Team
Created: 2024-09-23
Modified: 2024-09-23
"""

from flask import Blueprint, jsonify, request
from app.services.ocr_cache import OCRCache
from app.utils.decorators import jwt_login_required
from app.utils.logger import get_logger

logger = get_logger(__name__)

cache_bp = Blueprint('cache', __name__, url_prefix='/cache')

@cache_bp.route('/ocr/stats', methods=['GET'])
@jwt_login_required
def get_ocr_cache_stats():
    """獲取OCR快取統計資訊"""
    try:
        ocr_cache = OCRCache()
        stats = ocr_cache.get_cache_stats()

        return jsonify({
            'status': 'success',
            'data': {
                'cache_stats': stats,
                'message': 'OCR快取統計資訊獲取成功'
            }
        })

    except Exception as e:
        logger.error(f"獲取OCR快取統計失敗: {str(e)}")
        return jsonify({
            'status': 'error',
            'message': f'獲取快取統計失敗: {str(e)}'
        }), 500


@cache_bp.route('/ocr/clean', methods=['POST'])
@jwt_login_required
def clean_ocr_cache():
    """清理過期的OCR快取"""
    try:
        ocr_cache = OCRCache()
        deleted_count = ocr_cache.clean_expired_cache()

        return jsonify({
            'status': 'success',
            'data': {
                'deleted_count': deleted_count,
                'message': f'已清理 {deleted_count} 筆過期快取記錄'
            }
        })

    except Exception as e:
        logger.error(f"清理OCR快取失敗: {str(e)}")
        return jsonify({
            'status': 'error',
            'message': f'清理快取失敗: {str(e)}'
        }), 500


@cache_bp.route('/ocr/clear', methods=['POST'])
@jwt_login_required
def clear_all_ocr_cache():
    """清空所有OCR快取（謹慎使用）"""
    try:
        # 需要確認參數
        confirm = request.json.get('confirm', False) if request.json else False

        if not confirm:
            return jsonify({
                'status': 'error',
                'message': '需要確認參數 confirm: true 才能清空所有快取'
            }), 400

        ocr_cache = OCRCache()
        success = ocr_cache.clear_all_cache()

        if success:
            return jsonify({
                'status': 'success',
                'data': {
                    'message': '已清空所有OCR快取記錄'
                }
            })
        else:
            return jsonify({
                'status': 'error',
                'message': '清空快取失敗'
            }), 500

    except Exception as e:
        logger.error(f"清空OCR快取失敗: {str(e)}")
        return jsonify({
            'status': 'error',
            'message': f'清空快取失敗: {str(e)}'
        }), 500


@cache_bp.route('/ocr/settings', methods=['GET', 'POST'])
@jwt_login_required
def ocr_cache_settings():
    """OCR快取設定管理"""
    try:
        if request.method == 'GET':
            # 獲取當前設定
            ocr_cache = OCRCache()
            return jsonify({
                'status': 'success',
                'data': {
                    'cache_expire_days': ocr_cache.cache_expire_days,
                    'cache_db_path': str(ocr_cache.cache_db_path),
                    'message': '快取設定獲取成功'
                }
            })

        elif request.method == 'POST':
            # 更新設定（重新初始化OCRCache）
            data = request.json or {}
            cache_expire_days = data.get('cache_expire_days', 30)

            if not isinstance(cache_expire_days, int) or cache_expire_days < 1:
                return jsonify({
                    'status': 'error',
                    'message': '快取過期天數必須為正整數'
                }), 400

            # 這裡可以儲存設定到配置檔案或資料庫
            # 目前只是驗證參數有效性
            return jsonify({
                'status': 'success',
                'data': {
                    'cache_expire_days': cache_expire_days,
                    'message': '快取設定更新成功（重啟應用後生效）'
                }
            })

    except Exception as e:
        logger.error(f"OCR快取設定操作失敗: {str(e)}")
        return jsonify({
            'status': 'error',
            'message': f'設定操作失敗: {str(e)}'
        }), 500