using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

namespace YunDa.SOMS.Application.DataMonitoring.SecondaryCircuitInspection.Services
{
    /// <summary>
    /// 时间窗口计算服务接口
    /// </summary>
    public interface ITimeWindowCalculatorService
    {
        /// <summary>
        /// 计算时间窗口内的数据并返回JSON格式结果
        /// </summary>
        /// <param name="inspectionItemId">巡检项ID</param>
        /// <param name="timeWindowSeconds">时间窗口（秒）</param>
        /// <param name="cancellationToken">取消令牌</param>
        /// <returns>JSON格式的计算结果，如 {"16835_0": 52.5, "16835_1": 75.3}</returns>
        Task<string> CalculateTimeWindowDataAsync(
            Guid inspectionItemId,
            int timeWindowSeconds = 60,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// 计算时间窗口内的数据并返回结构化结果
        /// </summary>
        /// <param name="inspectionItemId">巡检项ID</param>
        /// <param name="timeWindowSeconds">时间窗口（秒）</param>
        /// <param name="cancellationToken">取消令牌</param>
        /// <returns>结构化的计算结果</returns>
        Task<CalculationResult> CalculateTimeWindowDataStructuredAsync(
            Guid inspectionItemId,
            int timeWindowSeconds = 60,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// 根据变量代码列表计算时间窗口数据
        /// </summary>
        /// <param name="variableCodes">变量代码列表，格式如 ["16835_0", "16835_1"]</param>
        /// <param name="timeWindowSeconds">时间窗口（秒）</param>
        /// <param name="cancellationToken">取消令牌</param>
        /// <returns>JSON格式的计算结果</returns>
        Task<string> CalculateVariableDataAsync(
            List<string> variableCodes,
            int timeWindowSeconds = 60,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// 计算时间窗口内的历史数据（支持时间序列）
        /// </summary>
        /// <param name="inspectionItemId">巡检项ID</param>
        /// <param name="timeWindowSeconds">时间窗口（秒）</param>
        /// <param name="sampleIntervalSeconds">采样间隔（秒）</param>
        /// <param name="cancellationToken">取消令牌</param>
        /// <returns>时间序列数据</returns>
        Task<List<Dictionary<string, object>>> CalculateTimeSeriesDataAsync(
            Guid inspectionItemId,
            int timeWindowSeconds = 60,
            int sampleIntervalSeconds = 5,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// 使用JavaScript表达式计算时间窗口数据
        /// </summary>
        /// <param name="inspectionItemId">巡检项ID</param>
        /// <param name="javascriptExpression">JavaScript表达式</param>
        /// <param name="timeWindowSeconds">时间窗口（秒）</param>
        /// <param name="cancellationToken">取消令牌</param>
        /// <returns>计算结果</returns>
        Task<CalculationResult> CalculateWithJavaScriptExpressionAsync(
            Guid inspectionItemId,
            string javascriptExpression,
            int timeWindowSeconds = 60,
            CancellationToken cancellationToken = default);
    }

    /// <summary>
    /// 计算结果类
    /// </summary>
    public class CalculationResult
    {
        /// <summary>
        /// 计算是否成功
        /// </summary>
        public bool IsSuccess { get; set; }

        /// <summary>
        /// 错误信息
        /// </summary>
        public string ErrorMessage { get; set; }

        /// <summary>
        /// 计算结果数据（变量代码 -> 值）
        /// </summary>
        public Dictionary<string, decimal> Data { get; set; }

        /// <summary>
        /// JSON格式的结果
        /// </summary>
        public string JsonResult { get; set; }

        /// <summary>
        /// 计算详情
        /// </summary>
        public List<string> CalculationDetails { get; set; }

        /// <summary>
        /// 计算耗时（毫秒）
        /// </summary>
        public long ExecutionTimeMs { get; set; }

        /// <summary>
        /// 计算时间
        /// </summary>
        public DateTime CalculationTime { get; set; }

        /// <summary>
        /// 时间窗口开始时间
        /// </summary>
        public DateTime WindowStartTime { get; set; }

        /// <summary>
        /// 时间窗口结束时间
        /// </summary>
        public DateTime WindowEndTime { get; set; }

        public CalculationResult()
        {
            Data = new Dictionary<string, decimal>();
            CalculationDetails = new List<string>();
            CalculationTime = DateTime.Now;
        }
    }
}