// Vikunja is a to-do list application to facilitate your life.
// Copyright 2018-present Vikunja and contributors. All rights reserved.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

package webtests

import (
	"net/http"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// TestAvatar covers the v2 binary-response endpoint GET /api/v2/avatar/{username}.
// It is the reference for serving raw bytes with a runtime-chosen Content-Type.
// Unlike v1's CRUD resources there is no model — the input is a path username and
// an optional size query param. The endpoint is authenticated (global security),
// so an anonymous request must be rejected with 401.
func TestAvatar(t *testing.T) {
	t.Run("Authenticated known user returns bytes and a content type", func(t *testing.T) {
		e, err := setupTestEnv()
		require.NoError(t, err)
		token := humaTokenFor(t, &testuser1)

		rec := humaRequest(t, e, http.MethodGet, "/api/v2/avatar/user1", "", token, "")
		require.Equal(t, http.StatusOK, rec.Code, "body: %s", rec.Body.String())
		assert.NotEmpty(t, rec.Body.Bytes(), "avatar bytes must be returned")
		assert.NotEmpty(t, rec.Header().Get("Content-Type"), "a content type must be set")
		// user1 has no avatar_provider configured, so the empty provider serves the default SVG.
		assert.Equal(t, "image/svg+xml", rec.Header().Get("Content-Type"))
	})

	t.Run("Size query param is accepted and clamped", func(t *testing.T) {
		e, err := setupTestEnv()
		require.NoError(t, err)
		token := humaTokenFor(t, &testuser1)

		// A size far above config.ServiceMaxAvatarSize must be clamped, not rejected.
		rec := humaRequest(t, e, http.MethodGet, "/api/v2/avatar/user1?size=99999", "", token, "")
		require.Equal(t, http.StatusOK, rec.Code, "oversized size must clamp, not error; body: %s", rec.Body.String())
		assert.NotEmpty(t, rec.Body.Bytes())

		// A normal size is honored.
		rec = humaRequest(t, e, http.MethodGet, "/api/v2/avatar/user1?size=64", "", token, "")
		require.Equal(t, http.StatusOK, rec.Code, "body: %s", rec.Body.String())
		assert.NotEmpty(t, rec.Body.Bytes())
	})

	t.Run("Anonymous request is rejected with 401", func(t *testing.T) {
		e, err := setupTestEnv()
		require.NoError(t, err)

		// Empty token => no Authorization header => anonymous. Proves the endpoint
		// inherits the global security and is NOT public.
		rec := humaRequest(t, e, http.MethodGet, "/api/v2/avatar/user1", "", "", "")
		assert.Equal(t, http.StatusUnauthorized, rec.Code, "anonymous must get 401; body: %s", rec.Body.String())
	})

	t.Run("Unknown user falls back to the default avatar like v1", func(t *testing.T) {
		e, err := setupTestEnv()
		require.NoError(t, err)
		token := humaTokenFor(t, &testuser1)

		// v1 GetAvatar does not 404 for an unknown user — it serves the empty
		// provider's default SVG with a 200. v2 must match that behaviour.
		rec := humaRequest(t, e, http.MethodGet, "/api/v2/avatar/this-user-does-not-exist", "", token, "")
		require.Equal(t, http.StatusOK, rec.Code, "body: %s", rec.Body.String())
		assert.NotEmpty(t, rec.Body.Bytes())
		assert.Equal(t, "image/svg+xml", rec.Header().Get("Content-Type"))
	})
}