package account

import (
	"net/http"
	"regexp"

	"git.kirsle.net/apps/gosocial/pkg/models"
	"git.kirsle.net/apps/gosocial/pkg/session"
	"git.kirsle.net/apps/gosocial/pkg/templates"
)

var ProfileRegexp = regexp.MustCompile(`^/u/([^@]+?)$`)

// User profile page (/u/username)
func Profile() http.HandlerFunc {
	tmpl := templates.Must("account/profile.html")
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		// Parse the username out of the URL parameters.
		var username string
		m := ProfileRegexp.FindStringSubmatch(r.URL.Path)
		if m != nil {
			username = m[1]
		}

		// Get the current user.
		currentUser, err := session.CurrentUser(r)
		if err != nil {
			session.FlashError(w, r, "Couldn't get CurrentUser: %s", err)
			templates.Redirect(w, "/")
			return
		}

		// Find this user.
		user, err := models.FindUser(username)
		if err != nil {
			templates.NotFoundPage(w, r)
			return
		}

		var isSelf = currentUser.ID == user.ID

		// Banned or disabled? Only admin can view then.
		if user.Status != models.UserStatusActive && !currentUser.IsAdmin {
			templates.NotFoundPage(w, r)
			return
		}

		// Is either one blocking?
		if models.IsBlocking(currentUser.ID, user.ID) && !currentUser.IsAdmin {
			templates.NotFoundPage(w, r)
			return
		}

		// Are they friends? And/or is this user private?
		var (
			isFriend  = models.FriendStatus(currentUser.ID, user.ID)
			isPrivate = !currentUser.IsAdmin && !isSelf && user.Visibility == models.UserVisibilityPrivate && isFriend != "approved"
		)

		vars := map[string]interface{}{
			"User":      user,
			"IsFriend":  isFriend,
			"IsPrivate": isPrivate,
		}

		if err := tmpl.Execute(w, r, vars); err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
	})
}