package handler

import (
	"net/http"
	"net/http/httptest"
	"testing"
)

// TestServeAuthAdmin pins the contract of the forward_auth endpoint
// used by upstream proxies (Caddy in the dev-shell pod) to gate
// admin-only routes:
//
//   200 → caller is in the root .zddc admins: list
//   403 → anonymous, OR not in admins:, OR no admins configured
//
// Reuses the profileTestRoot fixture which materializes a temp .zddc
// with the supplied admins, and the requestWithEmail helper that
// injects the email into request context the same way ACLMiddleware
// would in production.
func TestServeAuthAdmin(t *testing.T) {
	cfg, _ := profileTestRoot(t, []string{"alice@example.com"})

	cases := []struct {
		name       string
		email      string
		wantStatus int
	}{
		{"empty email is denied", "", http.StatusForbidden},
		{"non-admin is denied", "bob@example.com", http.StatusForbidden},
		{"admin is allowed", "alice@example.com", http.StatusOK},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			req := requestWithEmail(http.MethodGet, AuthPathPrefix+"/admin", tc.email)
			rec := httptest.NewRecorder()
			ServeAuthAdmin(cfg, rec, req)
			if rec.Code != tc.wantStatus {
				t.Errorf("status = %d, want %d (body: %q)",
					rec.Code, tc.wantStatus, rec.Body.String())
			}
		})
	}
}

// TestServeAuthAdmin_NoZddcRootDeniesEverything covers the bootstrap-
// state behaviour: when no /srv/.zddc exists, IsAdmin returns false for
// everyone, which means /.auth/admin returns 403 universally. This is
// the desired safe-default before an operator drops a root .zddc onto
// the share.
func TestServeAuthAdmin_NoZddcRootDeniesEverything(t *testing.T) {
	// profileTestRoot with nil admins skips writing the file entirely.
	cfg, _ := profileTestRoot(t, nil)

	for _, email := range []string{"", "alice@example.com", "anyone@example.com"} {
		req := requestWithEmail(http.MethodGet, AuthPathPrefix+"/admin", email)
		rec := httptest.NewRecorder()
		ServeAuthAdmin(cfg, rec, req)
		if rec.Code != http.StatusForbidden {
			t.Errorf("email %q without .zddc: status %d, want 403",
				email, rec.Code)
		}
	}
}
