package httpapi

import (
	"net/url"
	"strconv"
	"strings"
)

func parseIntDefault(s string, def int) int {
	if s == "" {
		return def
	}
	v, err := strconv.Atoi(s)
	if err != nil {
		return def
	}
	return v
}

func parseExpand(s string) map[string]bool {
	m := map[string]bool{}
	if strings.TrimSpace(s) == "" {
		return m
	}
	for _, p := range strings.Split(s, ",") {
		p = strings.TrimSpace(p)
		if p != "" {
			m[p] = true
		}
	}
	return m
}

func buildURL(base string, limit, offset int, order, expand string) string {
	v := url.Values{}
	if limit > 0 {
		v.Set("limit", strconv.Itoa(limit))
	}
	if offset > 0 {
		v.Set("offset", strconv.Itoa(offset))
	}
	if strings.TrimSpace(order) != "" {
		v.Set("order", order)
	}
	if strings.TrimSpace(expand) != "" {
		v.Set("expand", expand)
	}
	qs := v.Encode()
	if qs == "" {
		return base
	}
	return base + "?" + qs
}