package linkinfo

import (
	"net/http"
	"net/url"
)

type linkHandler struct {
	hosts   []string
	handler func(link string) (*LinkInfo, error)
}

type LinkInfoApi struct {
	client  *http.Client
	ImgurId string
}

type LinkInfo struct {
	Title         string   `json:"title"`
	Description   string   `json:"description"`
	ContentType   string   `json:"type"`
	ContentLength int64    `json:"contentLength"`
	Duration      string   `json:"duration,omitempty"`
	Redirects     []string `json:"redirects,omitempty"`
}

var (
	linkHandlers = []*linkHandler{
		{hosts: []string{"youtube.com", "youtu.be"}, handler: youtubeLinkHandler},
	}
)

func New() *LinkInfoApi {
	return &LinkInfoApi{}
}

func (i *LinkInfoApi) Retrieve(link string) (*LinkInfo, error) {
	u, err := url.Parse(link)

	if err != nil {
		return nil, err
	}

	for _, handler := range linkHandlers {
		for _, host := range handler.hosts {
			if host == u.Hostname() {
				return handler.handler(link)
			}
		}
	}

	return defaultLinkHandler(link)
}