"""
动态分类数据 API
"""
import uuid
import json
from datetime import datetime
from flask import Blueprint, request, jsonify, Response
from config import DATA_DIR
from utils import load_data, save_data, parse_date_to_timestamp

items_bp = Blueprint('api_items', __name__)


def is_review_required():
    try:
        import app as app_module
        return getattr(app_module, 'REQUIRE_REVIEW', False)
    except:
        return False


@items_bp.route('/api/items/<category_id>')
def api_items(category_id):
    items_file = DATA_DIR / f'items_{category_id}.json'
    items = load_data(items_file)
    hide_hidden = request.args.get('all', '0') == '0'
    if hide_hidden:
        items = [i for i in items if i.get('visible', True)]
    sort_by = request.args.get('sort', 'default')
    reverse = request.args.get('order', 'desc') == 'desc'
    def safe_key(x, key):
        val = x.get(key)
        if val is None:
            return 0 if key in ['price', 'views', 'year'] else ''
        return val
    if sort_by == 'default':
        items = sorted(items, key=lambda x: (
            not x.get('is_pinned', False),
            -(parse_date_to_timestamp(x.get('publish_date', '')) or
              parse_date_to_timestamp(x.get('created_at', '')) or 0)
        ))
    elif sort_by in ['name', 'price', 'year', 'created_at', 'publish_date', 'views', 'updated_at']:
        items = sorted(items, key=lambda x: safe_key(x, sort_by), reverse=reverse)
    return jsonify(items)


@items_bp.route('/api/items/<category_id>/<item_id>')
def api_item_detail(category_id, item_id):
    items_file = DATA_DIR / f'items_{category_id}.json'
    items = load_data(items_file)
    item = next((i for i in items if i['id'] == item_id), None)
    if not item:
        return jsonify({'error': 'Item not found'}), 404
    return jsonify(item)


@items_bp.route('/api/items/<category_id>', methods=['POST'])
def api_create_item(category_id):
    data = request.get_json()
    
    # 审核模式
    if is_review_required():
        from modules.routes.api_reviews import submit_for_review
        from modules.routes.api_notifications import create_notification
        
        review = submit_for_review(category_id, data, source='web')
        product_name = data.get('name', '未知')
        create_notification(
            title='新产品待审核',
            message=f'有新的产品"{product_name}"待审核',
            level='warning',
            category='review',
            data={'review_id': review['id'], 'category': category_id}
        )
        return jsonify({'success': True, 'message': '已提交审核，请等待管理员确认', 'review_id': review['id']})
    
    items_file = DATA_DIR / f'items_{category_id}.json'
    items = load_data(items_file)
    data['id'] = uuid.uuid4().hex[:12]
    data['category_id'] = category_id
    data['created_at'] = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
    data['visible'] = data.get('visible', True)
    data['publish_date'] = data.get('publish_date', '')
    data['views'] = data.get('views', 0)
    data['is_pinned'] = data.get('is_pinned', False)
    items.append(data)
    save_data(items_file, items)
    return jsonify(data)


@items_bp.route('/api/items/<category_id>/<item_id>', methods=['PUT'])
def api_update_item(category_id, item_id):
    data = request.get_json()
    items_file = DATA_DIR / f'items_{category_id}.json'
    items = load_data(items_file)
    item = next((i for i in items if i['id'] == item_id), None)
    if not item:
        return jsonify({'error': 'Item not found'}), 404
    item.update(data)
    item['updated_at'] = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
    save_data(items_file, items)
    return jsonify(item)


@items_bp.route('/api/items/<category_id>/<item_id>', methods=['DELETE'])
def api_delete_item(category_id, item_id):
    items_file = DATA_DIR / f'items_{category_id}.json'
    items = load_data(items_file)
    items = [i for i in items if i['id'] != item_id]
    save_data(items_file, items)
    return jsonify({'success': True})


@items_bp.route('/api/items/<category_id>/<item_id>/visible', methods=['POST'])
def api_toggle_item_visible(category_id, item_id):
    items_file = DATA_DIR / f'items_{category_id}.json'
    items = load_data(items_file)
    item = next((i for i in items if i['id'] == item_id), None)
    if not item:
        return jsonify({'error': 'Item not found'}), 404
    item['visible'] = not item.get('visible', True)
    save_data(items_file, items)
    return jsonify({'success': True, 'visible': item['visible']})


# ─── 导出导入 ───────────────────────────────────────────────────────

@items_bp.route('/api/items/<category_id>/export', methods=['GET'])
def api_export_items(category_id):
    """导出指定分类的所有数据"""
    try:
        items_file = DATA_DIR / f'items_{category_id}.json'
        items = load_data(items_file)
        export_data = {
            'type': 'items',
            'category_id': category_id,
            'items': items,
            'count': len(items),
            'export_time': datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
            'version': '1.0'
        }
        json_str = json.dumps(export_data, ensure_ascii=False, indent=2)
        response = Response(
            json_str,
            mimetype='application/json',
            headers={'Content-Disposition': f'attachment; filename={category_id}-export-{datetime.now().strftime("%Y%m%d%H%M%S")}.json'}
        )
        return response
    except Exception as e:
        return jsonify({'error': str(e)}), 500


@items_bp.route('/api/items/<category_id>/import', methods=['GET', 'POST'])
def api_import_items(category_id):
    """导入指定分类的数据"""
    try:
        if request.method == 'GET':
            return jsonify({'endpoint': f'/api/items/{category_id}/import', 'method': 'POST', 'params': {'mode': 'merge 或 replace'}})
        
        import_data = request.get_json()
        if not import_data or 'items' not in import_data:
            return jsonify({'error': '缺少 items 字段'}), 400
        
        mode = request.args.get('mode', 'merge')
        items_file = DATA_DIR / f'items_{category_id}.json'
        items = load_data(items_file)
        imported_items = import_data['items']
        
        result = {'success': True, 'imported': 0, 'updated': 0, 'skipped': []}
        
        for item in imported_items:
            existing = next((i for i in items if i['id'] == item['id']), None)
            if existing:
                if mode == 'replace':
                    existing.update(item)
                    result['updated'] += 1
                else:
                    result['skipped'].append(item['id'])
            else:
                items.append(item)
                result['imported'] += 1
        
        save_data(items_file, items)
        return jsonify(result)
    except Exception as e:
        return jsonify({'error': str(e)}), 500