package web

import (
	"net/http"

	"bitmask.me/skeleton/internal/app"
	scs "github.com/alexedwards/scs/v2"
	"github.com/gorilla/csrf"
)

type Config struct {
	CSRFSecret string `env:"CSRF_TOKEN"`
}

type Handlers struct {
	*app.App
	session *scs.Session
	Config  *Config
}

func NewHandlers(app *app.App) *Handlers {
	h := &Handlers{App: app}
	h.session = scs.NewSession()
	h.session.Cookie.Persist = false
	h.session.Cookie.Secure = false
	return h
}

func (h *Handlers) Session() *scs.Session {
	return h.session
}

func (h *Handlers) commonRenderContext(r *http.Request) map[string]interface{} {
	return map[string]interface{}{
		csrf.TemplateTag: csrf.TemplateField(r),
		"Username":       h.Session().GetString(r.Context(), SessKeyUserName),
		"UserID":         h.Session().GetString(r.Context(), SessKeyUserID),
	}
}

func (h *Handlers) CSRF() func(http.Handler) http.Handler {
	if h.Config.CSRFSecret == "" {
		// TODO FIXME: generate random
		h.Config.CSRFSecret = "12345678901234567890123456789012"
	}
	return csrf.Protect(
		[]byte(h.Config.CSRFSecret),
		csrf.FieldName("authenticity_token"),
		csrf.Secure(h.session.Cookie.Secure),
	)
}

func (h *Handlers) LandingPageHandler(w http.ResponseWriter, r *http.Request) {
	h.Templates().Get("landing.tmpl").Execute(w, nil)
}