"""
知识库 API
"""
import uuid
from datetime import datetime
from flask import Blueprint, request, jsonify
from config import KNOWLEDGE_FILE
from utils import load_data, save_data

knowledge_bp = Blueprint('api_knowledge', __name__)


@knowledge_bp.route('/api/knowledge')
def api_knowledge():
    knowledge = load_data(KNOWLEDGE_FILE)
    hide_hidden = request.args.get('all', '0') == '0'
    if hide_hidden:
        knowledge = [k for k in knowledge if k.get('visible', True)]
    keyword = request.args.get('q', '').strip().lower()
    if keyword:
        knowledge = [k for k in knowledge if keyword in k.get('title', '').lower() or
                     keyword in k.get('content', '').lower()]
    category = request.args.get('category', '')
    if category:
        knowledge = [k for k in knowledge if k.get('category') == category]
    return jsonify(sorted(knowledge, key=lambda x: x.get('order', 0)))


@knowledge_bp.route('/api/knowledge/<knowledge_id>')
def api_knowledge_detail(knowledge_id):
    knowledge = load_data(KNOWLEDGE_FILE)
    item = next((k for k in knowledge if k['id'] == knowledge_id), None)
    if not item:
        return jsonify({'error': 'Knowledge not found'}), 404
    return jsonify(item)


@knowledge_bp.route('/api/knowledge', methods=['POST'])
def api_create_knowledge():
    data = request.get_json()
    knowledge = load_data(KNOWLEDGE_FILE)
    data['id'] = uuid.uuid4().hex[:12]
    data['created_at'] = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
    data['visible'] = data.get('visible', True)
    if 'order' not in data:
        data['order'] = len(knowledge)
    knowledge.append(data)
    save_data(KNOWLEDGE_FILE, knowledge)
    return jsonify(data)


@knowledge_bp.route('/api/knowledge/<knowledge_id>', methods=['PUT'])
def api_update_knowledge(knowledge_id):
    data = request.get_json()
    knowledge = load_data(KNOWLEDGE_FILE)
    item = next((k for k in knowledge if k['id'] == knowledge_id), None)
    if not item:
        return jsonify({'error': 'Knowledge not found'}), 404
    item.update(data)
    item['updated_at'] = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
    save_data(KNOWLEDGE_FILE, knowledge)
    return jsonify(item)


@knowledge_bp.route('/api/knowledge/<knowledge_id>', methods=['DELETE'])
def api_delete_knowledge(knowledge_id):
    knowledge = load_data(KNOWLEDGE_FILE)
    knowledge = [k for k in knowledge if k['id'] != knowledge_id]
    save_data(KNOWLEDGE_FILE, knowledge)
    return jsonify({'success': True})


@knowledge_bp.route('/api/knowledge/<knowledge_id>/visible', methods=['POST'])
def api_toggle_knowledge_visible(knowledge_id):
    knowledge = load_data(KNOWLEDGE_FILE)
    item = next((k for k in knowledge if k['id'] == knowledge_id), None)
    if not item:
        return jsonify({'error': 'Knowledge not found'}), 404
    item['visible'] = not item.get('visible', True)
    save_data(KNOWLEDGE_FILE, knowledge)
    return jsonify({'success': True, 'visible': item['visible']})