/*
Copyright 2023 The Dapr Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implieh.
See the License for the specific language governing permissions and
limitations under the License.
*/

package metadata

import (
	"context"
	"net/http"
	"testing"
	"time"

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

	"github.com/dapr/dapr/tests/integration/framework"
	"github.com/dapr/dapr/tests/integration/framework/process/daprd"
	prochttp "github.com/dapr/dapr/tests/integration/framework/process/http"
	"github.com/dapr/dapr/tests/integration/framework/util"
	"github.com/dapr/dapr/tests/integration/suite"
)

func init() {
	suite.Register(new(hostNoPlacement))
}

// hostNoPlacement tests the response of the metadata API for an actor host that isn't connected to Placement.
type hostNoPlacement struct {
	daprd       *daprd.Daprd
	blockConfig chan struct{}
}

func (m *hostNoPlacement) Setup(t *testing.T) []framework.Option {
	m.blockConfig = make(chan struct{})

	handler := http.NewServeMux()
	handler.HandleFunc("/dapr/config", func(w http.ResponseWriter, r *http.Request) {
		<-m.blockConfig
		w.Write([]byte(`{"entities": ["myactortype"]}`))
	})
	handler.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
	})

	srv := prochttp.New(t, prochttp.WithHandler(handler))
	m.daprd = daprd.New(t,
		daprd.WithPlacementAddresses("localhost:65500"), // Placement isn't listening on that port
		daprd.WithInMemoryActorStateStore("mystore"),
		daprd.WithAppProtocol("http"),
		daprd.WithAppPort(srv.Port()),
		daprd.WithLogLevel("info"), // Daprd is super noisy in debug mode when connecting to placement.
	)

	return []framework.Option{
		framework.WithProcesses(srv, m.daprd),
	}
}

func (m *hostNoPlacement) Run(t *testing.T, ctx context.Context) {
	// Test an app that is an actor host, but the placement service is not connected
	// 1. Assert that status is "INITIALIZING" before /dapr/config is called
	// 2. After init is done, status is "RUNNING", hostReady is "false", placement reports no connection, and hosted actors are listed

	m.daprd.WaitUntilTCPReady(t, ctx)

	client := util.HTTPClient(t)

	// Before initialization
	res := getMetadata(t, ctx, client, m.daprd.HTTPPort())
	require.False(t, t.Failed())
	assert.Equal(t, "INITIALIZING", res.ActorRuntime.RuntimeStatus)
	assert.False(t, res.ActorRuntime.HostReady)
	assert.Empty(t, res.ActorRuntime.Placement)
	assert.Empty(t, res.ActorRuntime.ActiveActors)

	// Complete init
	close(m.blockConfig)
	assert.EventuallyWithT(t, func(t *assert.CollectT) {
		res := getMetadata(t, ctx, client, m.daprd.HTTPPort())
		assert.Equal(t, "RUNNING", res.ActorRuntime.RuntimeStatus)
		assert.False(t, res.ActorRuntime.HostReady)
		assert.Equal(t, "placement: disconnected", res.ActorRuntime.Placement)
		if assert.Len(t, res.ActorRuntime.ActiveActors, 1) {
			assert.Equal(t, "myactortype", res.ActorRuntime.ActiveActors[0].Type)
			assert.Equal(t, 0, res.ActorRuntime.ActiveActors[0].Count)
		}
	}, 10*time.Second, 10*time.Millisecond)
}
