package handlers

import (
	"net/http"
	"strconv"

	"git.haelnorr.com/h/oslstats/internal/db"
	"github.com/pkg/errors"
	"github.com/uptrace/bun"
)

func pageOptsFromForm(r *http.Request) (*db.PageOpts, error) {
	var pageNum, perPage int
	var order bun.Order
	var orderBy string
	var err error

	if pageStr := r.FormValue("page"); pageStr != "" {
		pageNum, err = strconv.Atoi(pageStr)
		if err != nil {
			return nil, errors.Wrap(err, "invalid page number")
		}
	}
	if perPageStr := r.FormValue("per_page"); perPageStr != "" {
		perPage, err = strconv.Atoi(perPageStr)
		if err != nil {
			return nil, errors.Wrap(err, "invalid per_page number")
		}
	}
	order = bun.Order(r.FormValue("order"))
	orderBy = r.FormValue("order_by")

	pageOpts := &db.PageOpts{
		Page:    pageNum,
		PerPage: perPage,
		Order:   order,
		OrderBy: orderBy,
	}
	return pageOpts, nil
}

func pageOptsFromQuery(r *http.Request) (*db.PageOpts, error) {
	var pageNum, perPage int
	var order bun.Order
	var orderBy string
	var err error
	if pageStr := r.URL.Query().Get("page"); pageStr != "" {
		pageNum, err = strconv.Atoi(pageStr)
		if err != nil {
			return nil, errors.Wrap(err, "invalid page number")
		}
	}
	if perPageStr := r.URL.Query().Get("per_page"); perPageStr != "" {
		perPage, err = strconv.Atoi(perPageStr)
		if err != nil {
			return nil, errors.Wrap(err, "invalid per_page number")
		}
	}
	order = bun.Order(r.URL.Query().Get("order"))
	orderBy = r.URL.Query().Get("order_by")
	pageOpts := &db.PageOpts{
		Page:    pageNum,
		PerPage: perPage,
		Order:   order,
		OrderBy: orderBy,
	}
	return pageOpts, nil
}