package router

import (
	"fmt"
	"net/url"
	"slices"
	"strings"

	"github.com/SayaAndy/saya-today-web/locale"
	"github.com/gofiber/fiber/v2"
)

func Api_V1_GeneralPage_Header(l map[string]*locale.LocaleConfig, langs []string) func(c *fiber.Ctx) error {
	return func(c *fiber.Ctx) error {
		c.Set(fiber.HeaderContentType, fiber.MIMETextPlainCharsetUTF8)

		referer := c.Get("Referer", "")
		if referer == "" {
			return c.Status(fiber.ErrBadRequest.Code).SendString("'Referer' header is empty")
		}
		urlStruct, err := url.ParseRequestURI(referer)
		if err != nil {
			return c.Status(fiber.ErrBadRequest.Code).SendString(fmt.Sprintf("'Referer' header is invalid: %s", err.Error()))
		}

		path := urlStruct.EscapedPath()
		pathParts := strings.SplitN(strings.Trim(path, "/"), "/", 2)
		if len(pathParts) < 2 {
			return c.Status(fiber.ErrBadRequest.Code).SendString("'Referer' header is invalid: expect format '/{lang}/...'")
		}

		lang := pathParts[0]
		if !slices.Contains(langs, lang) {
			return c.Status(fiber.ErrNotFound.Code).SendString(fmt.Sprintf("server does not support '%s' language... yet??", lang))
		}

		return nil
	}
}