package web

import (
	"fmt"
	"html"
	"net/http"

	"github.com/owen/vibedns/internal/app"
	"github.com/owen/vibedns/internal/blockpage"
)

func (s *Server) handleSettingsBlockPage(w http.ResponseWriter, r *http.Request) error {
	boundHTTP, boundHTTPS := s.app.BlockPage.ListenAddrs()
	s.settingsPage(w, r, "settings_blockpage", "blockpage", "Block Page Settings", map[string]any{
		"Running":    s.app.BlockPage.Running(),
		"BoundHTTP":  boundHTTP,
		"BoundHTTPS": boundHTTPS,
	})
	return nil
}

func (s *Server) handleSettingsBlockPageSave(w http.ResponseWriter, r *http.Request) error {
	if err := parseForm(r); err != nil {
		return err
	}
	next := s.app.Settings()
	next.BlockPage.Enabled = formBool(r, "enabled")
	next.BlockPage.HTTPListen = formString(r, "http_listen")
	next.BlockPage.HTTPSListen = formString(r, "https_listen")
	next.BlockPage.HTML = r.FormValue("html")

	if err := s.app.SaveSettings(r.Context(), s.actor(r), app.GroupBlockPage, next); err != nil {
		return err
	}
	setFlash(w, r, "success", "Block page settings saved.")
	return s.redirect(w, r, "/settings/blockpage")
}

// handleSettingsBlockPagePreview renders the HTML in the request body with
// sample data, without saving it, so the editor can show a live preview.
func (s *Server) handleSettingsBlockPagePreview(w http.ResponseWriter, r *http.Request) error {
	if err := parseForm(r); err != nil {
		return err
	}
	out, err := blockpage.Render(r.FormValue("html"))
	if err != nil {
		out = fmt.Sprintf("<pre style=\"white-space:pre-wrap;font-family:monospace;color:#c00;padding:1em\">Template error: %s</pre>", html.EscapeString(err.Error()))
	}
	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	_, _ = w.Write([]byte(out))
	return nil
}