using Jace;
using System;
using System.Collections.Generic;

public static class JaceCalculator
{
    private static readonly CalculationEngine Engine = new CalculationEngine();

    /// <summary>
    /// 解析并计算数学表达式
    /// </summary>
    /// <param name="formula">数学表达式字符串</param>
    /// <param name="variables">变量字典</param>
    /// <returns>计算结果</returns>
    public static double Calculate(string formula, Dictionary<string, double> variables)
    {
        if (string.IsNullOrEmpty(formula))
        {
            throw new ArgumentException("Formula cannot be null or empty.");
        }

        if (variables == null || variables.Count == 0)
        {
            throw new ArgumentException("Variables dictionary cannot be null or empty.");
        }

        try
        {
            return Engine.Calculate(formula, variables);
        }
        catch (Exception ex)
        {
            throw new InvalidOperationException($"Failed to calculate formula: {ex.Message}", ex);
        }
    }

    public static void Init()
    { 
        Engine.AddFunction("int", (Func<double, double>)(x => (int)x));
    }
}