// Copyright (c) 2024-2026 Celestino Amoroso (celestino.amoroso@gmail.com).
// All rights reserved.

// interval.go
package interval

import (
	"fmt"

	"git.portale-stac.it/go-pkg/expr/kern"
	"git.portale-stac.it/go-pkg/expr/types"
)

const TypeName = "interval"

type IntervalType struct {
	begin, end, step int64
}

func NewInterval(begin, end, step int64) *IntervalType {
	return &IntervalType{
		begin: begin,
		end:   end,
		step:  step,
	}
}

func (p *IntervalType) Begin() int64 {
	return p.begin
}

func (p *IntervalType) End() int64 {
	return p.end
}

func (p *IntervalType) Step() int64 {
	return p.step
}

func IsInterval(v any) (ok bool) {
	_, ok = v.(*IntervalType)
	return ok
}

func (p *IntervalType) TypeName() string {
	return TypeName
}

func (p *IntervalType) ToString(opt kern.FmtOpt) string {
	return fmt.Sprintf("%d..%d..%d", p.begin, p.end, p.step)
}

func (p *IntervalType) String() string {
	return p.ToString(0)
}

func (p *IntervalType) ToIntTriple() (b, e, s int) {
	b = int(p.begin)
	e = int(p.end)
	s = int(p.step)
	return
}

func (p *IntervalType) Contains(value any) (ok bool) {
	if v, err := types.ToGoInt64(value, TypeName); err == nil {
		if p.begin <= p.end {
			ok = (v >= p.begin && v < p.end && (v-p.begin)%p.step == 0)
		} else {
			ok = (v <= p.begin && v > p.end && (v-p.begin)%p.step == 0)
		}
	}
	return
}

// func (b *bool) EqualTo(other kern.Equaler) (equal bool) {
// 	if otherBool, ok := other.(*bool); ok {
// 		equal = b == otherBool
// 	}
// 	return
// }