package views

import (
	"strconv"
	"strings"

	g "maragu.dev/gomponents"
	. "maragu.dev/gomponents/html"
)

// PageInfo is the pagination state of a list view.
// URLTemplate contains "{page}" as the placeholder for the page number,
// e.g. "/repo/issues?status=open&page={page}".
type PageInfo struct {
	Page        int
	TotalPages  int
	URLTemplate string
}

// Pagination renders previous/next links. It renders nothing for one page.
func Pagination(p PageInfo) g.Node {
	if p.TotalPages <= 1 {
		return nil
	}
	url := func(n int) string {
		return strings.ReplaceAll(p.URLTemplate, "{page}", strconv.Itoa(n))
	}
	return Nav(Class("pagination"), Aria("label", "Pagination"),
		Div(Class("pagination-prev"),
			g.If(p.Page > 1, A(Href(url(p.Page-1)), Class("pagination-btn"), g.Text("← Previous"))),
		),
		Span(Class("pagination-info"),
			g.Text("Page "+strconv.Itoa(p.Page)+" of "+strconv.Itoa(p.TotalPages))),
		Div(Class("pagination-next"),
			g.If(p.Page < p.TotalPages, A(Href(url(p.Page+1)), Class("pagination-btn"), g.Text("Next →"))),
		),
	)
}