package main

import (
	"bytes"
	"fmt"
	"os/exec"
)

type MathPlugin struct{}

func (p MathPlugin) Name() string { return "math" }
func (p MathPlugin) ShortHelp() string { return "Evaluate a math expression" }
func (p MathPlugin) DetailedHelp() string {
	return "math <expression>\n\nEvaluates a mathematical expression using qalc (libqalculate).\n\nExamples:\n  math 2+2\n  math 100 * 9.5%\n  math sqrt(144)"
}
func (p MathPlugin) Execute(msg BotMessage, args string) string {
	return runMath(args)
}

func runMath(s string) string {
	cmd := exec.Command("qalc", s)
	var out bytes.Buffer
	cmd.Stdout = &out

	err := cmd.Run()
	if err != nil {
		fmt.Println(err)
	}
	return out.String()
}