package pages

import (
	"delayed.link/storage"
	_ "embed"
	"errors"
	"fmt"
	"github.com/google/uuid"
	"net/http"
	"time"
)

func Get(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	uid, err := uuid.Parse(id)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	l, err := storage.Current.Load(uid)
	if err != nil && errors.Is(err, storage.NotFoundError) {
		// if not found error, return 404
		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
		return
	} else if err != nil {
		// else return internal error
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	valid := l.Valid()
	if errors.Is(valid, storage.NotFoundError) {
		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
		return
	}
	if errors.Is(valid, storage.NoOpensError) {
		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
		return
	}
	if errors.Is(valid, storage.NotYetOpenError) {
		http.Error(w, http.StatusText(http.StatusLocked), http.StatusLocked)
		msg := fmt.Sprintf("\n\nThis link will be usable in %v minutes.", int(l.OpensFrom.Sub(time.Now()).Minutes()))
		w.Write([]byte(msg))
		return
	}

	err = l.Use()
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
	}

	http.Redirect(w, r, l.Target, http.StatusFound)
}