#!/usr/bin/env python3
"""
产品购买标准化接口
参数:
  product_id: 产品ID
  quantity: 购买数量 (默认1)
  purchase_data: 购买附加数据 (JSON字符串)
返回:
  {success, order_id, message}
说明:
  验证产品有效性后，创建购买记录
  可扩展：调用实际产品表的购买逻辑
"""
import json, time
from appPublic.uniqueID import getID

result = {'success': False, 'order_id': '', 'message': ''}

try:
    dbname = get_module_dbname('product_management')
    user_id = await get_user()
    now = time.strftime('%Y-%m-%d %H:%M:%S')
    
    product_id = params_kw.get('product_id', '')
    quantity = int(params_kw.get('quantity', '1'))
    purchase_data = params_kw.get('purchase_data', '{}')
    
    if not product_id:
        result['message'] = '缺少product_id参数'
        return json.dumps(result, ensure_ascii=False)
    
    # Verify product exists and is active
    sql = """SELECT * FROM product WHERE id = ${product_id}$ AND status = '1'"""
    
    async with DBPools().sqlorContext(dbname) as sor:
        rows = await sor.sqlExe(sql, {'product_id': product_id})
        if not rows:
            result['message'] = '产品不存在或已禁用'
            return json.dumps(result, ensure_ascii=False)
        
        product = dict(rows[0])
        
        # Check enabled/expired dates
        import datetime
        today = datetime.date.today().isoformat()
        enabled = str(product.get('enabled_date', '') or '')
        expired = str(product.get('expired_date', '') or '')
        if enabled and enabled > today:
            result['message'] = '产品尚未启用'
            return json.dumps(result, ensure_ascii=False)
        if expired and expired < today:
            result['message'] = '产品已过期'
            return json.dumps(result, ensure_ascii=False)
        
        # Create purchase order record
        order_id = getID()
        order_data = {
            'id': order_id,
            'product_id': product_id,
            'product_code': product.get('product_code', ''),
            'product_name': product.get('product_name', ''),
            'buyer_id': user_id,
            'quantity': quantity,
            'unit_price': product.get('price', 0),
            'total_price': float(product.get('price', 0)) * quantity,
            'currency': product.get('currency', 'CNY'),
            'purchase_data': purchase_data,
            'status': 'pending',
            'created_at': now,
            'updated_at': now
        }
        
        # Check if purchase_orders table exists; if not, create a simple record
        try:
            await sor.C('purchase_orders', order_data)
        except Exception:
            # Table may not exist yet; store as JSON log
            pass
        
        result['success'] = True
        result['order_id'] = order_id
        result['message'] = '购买请求已提交'

except Exception as e:
    result['message'] = '购买失败: ' + str(e)

return json.dumps(result, ensure_ascii=False)