namespace StringMath.Expressions;

public record Expr

{

public static Mul operator *(Expr left, Expr right) => new(left, right);

public static Div operator /(Expr left, Expr right) => new(left, right);

public static Sum operator +(Expr left, Expr right) => new(left, right);

public static Diff operator -(Expr left, Expr right) => new(left, right);

public static Pow operator ^(Expr left, Expr right) => new(left, right);

public static Mod operator %(Expr left, Expr right) => new(left, right);

public static Neg operator -(Expr operand) => new(operand);

public static implicit operator Expr(double value) => new Number(value);

public static implicit operator Expr(string value) => value.ToExpr();

}

public record Variable(string Name) : Expr

{

public static implicit operator string(Variable var) => var.Name;

public static implicit operator Variable(string name) => new(name);

}

public record Number(double Value) : Expr

{

public static implicit operator Number(double val) => new(val);

public static implicit operator double(Number num) => num.Value;

}

public record Binary(Expr Left, string Op, Expr Right) : Expr;

public record Unary(Expr Value, string Op) : Expr;

public record Neg(Expr Value) : Unary(Value, "-");

public record Factorial(Expr Value) : Unary(Value, "!");

public record Sin(Expr Value) : Unary(Value, "sin");

public record Cos(Expr Value) : Unary(Value, "cos");

public record Abs(Expr Value) : Unary(Value, "abs");

public record Sqrt(Expr Value) : Unary(Value, "sqrt");

public record Tan(Expr Value) : Unary(Value, "tan");

public record Atan(Expr Value) : Unary(Value, "atan");

public record Exp(Expr Value) : Unary(Value, "exp");

public record Sum(Expr Left, Expr Right) : Binary(Left, "+", Right);

public record Diff(Expr Left, Expr Right) : Binary(Left, "-", Right);

public record Mul(Expr Left, Expr Right) : Binary(Left, "*", Right);

public record Div(Expr Left, Expr Right) : Binary(Left, "/", Right);

public record Pow(Expr Left, Expr Right) : Binary(Left, "^", Right);

public record Mod(Expr Left, Expr Right) : Binary(Left, "%", Right);

public record Log(Expr Left, Expr Right) : Binary(Left, "log", Right);