package handlers

import (
	"net/http"

	"git.haelnorr.com/h/golib/hws"
	"git.haelnorr.com/h/oslstats/internal/db"
	"git.haelnorr.com/h/oslstats/internal/validation"
	"github.com/uptrace/bun"
)

// pageOptsFromForm calls r.ParseForm and gets the pageOpts from the formdata.
// It renders a Bad Request error page on fail
// PageOpts will be nil on fail
func pageOptsFromForm(s *hws.Server, w http.ResponseWriter, r *http.Request) *db.PageOpts {
	getter, ok := validation.ParseFormOrError(s, w, r)
	if !ok {
		return nil
	}
	return getPageOpts(s, w, r, getter)
}

// pageOptsFromQuery gets the pageOpts from the request query and renders a Bad Request error page on fail
// PageOpts will be nil on fail
func pageOptsFromQuery(s *hws.Server, w http.ResponseWriter, r *http.Request) *db.PageOpts {
	return getPageOpts(s, w, r, validation.NewQueryGetter(r))
}

func getPageOpts(s *hws.Server, w http.ResponseWriter, r *http.Request, g validation.Getter) *db.PageOpts {
	page := g.Int("page").Optional().Min(1).Value
	perPage := g.Int("per_page").Optional().Min(1).Max(100).Value
	order := g.String("order").TrimSpace().ToUpper().Optional().AllowedValues([]string{"ASC", "DESC"}).Value
	orderBy := g.String("order_by").TrimSpace().Optional().ToLower().Value
	valid := g.ValidateAndError(s, w, r)
	if !valid {
		return nil
	}
	pageOpts := &db.PageOpts{
		Page:    page,
		PerPage: perPage,
		Order:   bun.Order(order),
		OrderBy: orderBy,
	}
	return pageOpts
}