package handlers

import (
	"net/http"

	"github.com/travelswitch/travelhub/backend/internal/models"
)

// ListTenants backs the agency picker on the sign-in screen. It is
// unauthenticated by necessity -- the client must choose a tenant before it
// can present credentials -- so it returns nothing but slugs and display
// names.
func (h *Handler) ListTenants(w http.ResponseWriter, r *http.Request) {
	tenants, err := h.Repo.ListTenants(r.Context())
	if err != nil {
		h.fail(w, err, "list tenants")
		return
	}

	type publicTenant struct {
		Slug string `json:"slug"`
		Name string `json:"name"`
	}
	items := make([]publicTenant, 0, len(tenants))
	for _, t := range tenants {
		items = append(items, publicTenant{Slug: t.Slug, Name: t.Name})
	}
	writeJSON(w, http.StatusOK, items)
}

// Session echoes the authenticated caller back to the client. The Angular app
// calls it once at sign-in to validate the credentials it just collected, and
// again on reload to confirm the stored ones still work.
func (h *Handler) Session(w http.ResponseWriter, r *http.Request) {
	id, ok := h.identity(w, r)
	if !ok {
		return
	}

	writeJSON(w, http.StatusOK, struct {
		User   models.User   `json:"user"`
		Tenant models.Tenant `json:"tenant"`
	}{User: id.User, Tenant: id.Tenant})
}