package magic

import (
	"net/http"
	"strings"
)

type ErrUknownContentType string

func (err ErrUknownContentType) Error() string {
	return "unknown content-type: " + string(err)
}

type AutoDecode[T any] struct {
	Data T
}

func (d *AutoDecode[T]) FromRequest(r *http.Request) error {
	contentType, _, _ := strings.Cut(r.Header.Get("Content-Type"), ";")
	switch contentType {
	case "application/json":
		decoder := &Json[T]{}
		if err := decoder.FromRequest(r); err != nil {
			return err
		}
		d.Data = decoder.Data
	case "multipart/form-data", "application/x-www-form-urlencoded":
		decoder := &Form[T]{}
		if err := decoder.FromRequest(r); err != nil {
			return err
		}
		d.Data = decoder.Data
	}
	return ErrUknownContentType(contentType)
}

func (d AutoDecode[T]) TakeRequestBody() {}