using System.Linq.Expressions;

namespace HttpClientStudy.WebApp
{
    /// <summary>
    /// API 返回基类
    /// </summary>
    public class BaseResult
    {
        /// <summary>
        /// 接口返回代码
        /// </summary>
        public int Code { get; set; }

        /// <summary>
        /// 接口返回说明信息
        /// </summary>
        public string? Message { get; set; }

        /// <summary>
        /// 接口返回数据
        /// </summary>
        public object? Data { get; set; } = string.Empty;
    }

    /// <summary>
    /// API 泛型返回基类
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class BaseResult<T> : BaseResult
    {
        /// <summary>
        /// 创建返回基数
        /// </summary>
        /// <param name="data">泛型数据</param>
        /// <param name="code">编码</param>
        /// <param name="message">说明信息</param>
        /// <returns></returns>
        public static BaseResult<T> Create(T? data = default, int code = 0, string message = "")
        {
            return new BaseResult<T> { Data = data, Code = code, Message = message };
        }

        /// <summary>
        /// 泛型返回核心数据
        /// </summary>
        public new T? Data { get; set; }
    }

    /// <summary>
    /// API返回基类 工具类
    /// </summary>
    public static class BaseResultUtil
    {
        /// <summary>
        /// 创建 泛型返回基类
        /// </summary>
        public static BaseResult<TData> Create<TData>(TData data, int code = 0, string message = "") 
        {
            return new BaseResult<TData>() { Data = data, Code = code, Message = message };
        }

        /// <summary>
        /// 创建 泛型成功返回基类
        /// </summary>
        public static BaseResult<TData> Success<TData>() 
        {
            return Success<TData>(default, 1, "成功");
        }

        /// <summary>
        /// 创建 泛型成功返回基类
        /// </summary>
        public static BaseResult<TData> Success<TData>(TData? data)
        {
            return Success(data, 1, "成功");
        }

        /// <summary>
        /// 创建 泛型成功返回基类
        /// </summary>
        public static BaseResult<TData> Success<TData>(TData? data, string message) 
        {
            return Success(data, 1, message);
        }

        /// <summary>
        /// 创建 泛型成功返回基类
        /// </summary>
        public static BaseResult<TData> Success<TData>(TData? data, int code, string message) 
        {
            return new BaseResult<TData>() { Data = data, Code = code, Message = message };
        }

        /// <summary>
        /// 创建 泛型错误返回基类
        /// </summary>
        public static BaseResult<TData> Error<TData>() 
        {
            return Error<TData>(default, 0, "错误");
        }

        /// <summary>
        /// 创建 泛型错误返回基类
        /// </summary>
        public static BaseResult<TData> Error<TData>(TData? data) 
        {
            return Error(data, 0, "错误");
        }

        /// <summary>
        /// 创建 泛型错误返回基类
        /// </summary>
        public static BaseResult<TData> Error<TData>(TData? data, int code = 0, string message = "错误") 
        {
            return new BaseResult<TData>() { Data = data, Code = code, Message = message };
        }

        /// <summary>
        /// 创建 泛型失败返回基类
        /// </summary>
        public static BaseResult<TData> Fail<TData>()
        {
            return Fail<TData>(default, 0, "失败");
        }

        /// <summary>
        /// 创建 泛型失败返回基类
        /// </summary>
        public static BaseResult<TData> Fail<TData>(TData? data) 
        {
            return Fail(data, 0, "失败");
        }

        /// <summary>
        /// 创建 泛型失败返回基类
        /// </summary>
        public static BaseResult<TData> Fail<TData>(TData? data, int code = 0, string message = "失败") 
        {
            return new BaseResult<TData>() { Data = data, Code = 0, Message = "失败" };
        }

        /// <summary>
        /// 创建 泛型异常返回基类
        /// </summary>
        public static BaseResult<TData> Exception<TData>(Exception ex)
        {
            return Exception<TData>(ex, default,0);
        }

        /// <summary>
        /// 创建 泛型异常返回基类
        /// </summary>
        /// <typeparam name="TData"></typeparam>
        /// <param name="ex"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        public static BaseResult<TData> Exception<TData>(Exception ex, TData? data) 
        {
            return Exception(ex, data, 0);
        }

        /// <summary>
        /// 创建 泛型异常返回基类
        /// </summary>
        public static BaseResult<TData> Exception<TData>(Exception ex, TData? data, int code = 0) 
        {
            return new BaseResult<TData>() { Data = data, Code = code, Message = $"异常：{ex.Message}" };
        }

        /// <summary>
        /// 创建 泛型默认返回基类
        /// </summary>
        public static BaseResult<TData> Default<TData>(TData? data = default)
        {
            return new BaseResult<TData>() { Code = 0, Message = "", Data = data };
        }
    }
}