package calc

import (
	"gitea.zaclys.com/bvaudour/gob/number"
	"gitea.zaclys.com/bvaudour/gob/option"
)

type integer interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64 | ~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64
}

func Op1(cb number.Op1Func) CalcFunc {
	return func(c *Calc) (err option.Option[error]) {
		result := c.stack.Pop()
		if n, ok := result.Ok(); ok {
			c.Push(cb(n))
		} else if e, ok := result.Err(); ok {
			c.Reset()
			err = option.Some(e)
		}

		return
	}
}

func Op2(cb number.Op2Func) CalcFunc {
	return func(c *Calc) (err option.Option[error]) {
		result := c.stack.Pop2()
		if n, ok := result.Ok(); ok {
			c.Push(cb(n.N1, n.N2))
		} else if e, ok := result.Err(); ok {
			c.Reset()
			err = option.Some(e)
		}

		return
	}
}

func Reduce(cb number.ReduceFunc) CalcFunc {
	return func(c *Calc) (err option.Option[error]) {
		if c.stack.IsEmpty() {
			err = option.Some(ErrIsEmpty(errStack))
		} else {
			n := cb(c.Stack()...)
			c.Reset()
			c.Push(n)
		}

		return
	}
}

func ConvertToBase[N integer](base N) number.Op1Func {
	return func(n number.Number) number.Number {
		return number.ToBase(n, base)
	}
}

func ConvertToInteger[N integer](base ...N) number.Op1Func {
	return func(n number.Number) number.Number {
		return number.ToInteger(n, base...)
	}
}

func ConvertToDecimal[N integer](base ...N) number.Op1Func {
	return func(n number.Number) number.Number {
		return number.ToDecimal(n, base...)
	}
}

func ConvertToFraction[N integer](base ...N) number.Op1Func {
	return func(n number.Number) number.Number {
		return number.ToFraction(n, base...)
	}
}

func ConvertToScientific[N integer](base ...N) number.Op1Func {
	return func(n number.Number) number.Number {
		return number.ToScientific(n, base...)
	}
}

func ConvertRound(precision uint64, base ...uint) number.Op1Func {
	return func(n number.Number) number.Number {
		return number.Round(n, precision, base...)
	}
}