/*
Copyright 2021 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 implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package standalone

import (
	"fmt"
	"os"
	"runtime"
	"testing"

	"github.com/stretchr/testify/assert"

	"github.com/dapr/cli/utils"
)

func TestInvoke(t *testing.T) {
	testCases := []struct {
		name          string
		errorExpected bool
		errString     string
		appID         string
		method        string
		lo            ListOutput
		listErr       error
		expectedPath  string
		postResponse  string
		resp          string
	}{
		{
			name:          "list apps error",
			errorExpected: true,
			errString:     assert.AnError.Error(),
			listErr:       assert.AnError,
		},
		{
			name:          "appID not found",
			errorExpected: true,
			appID:         "invalid",
			errString:     "app ID invalid not found",
			lo: ListOutput{
				AppID: "testapp",
			},
		},
		{
			name:   "appID found successful invoke empty response",
			appID:  "testapp",
			method: "test",
			lo: ListOutput{
				AppID: "testapp",
			},
		},
		{
			name:   "appID found successful invoke",
			appID:  "testapp",
			method: "test",
			lo: ListOutput{
				AppID: "testapp",
			},
			expectedPath: "/v1.0/invoke/testapp/method/test",
			postResponse: "test payload",
			resp:         "successful invoke",
		},
	}

	for _, socket := range []string{"", "/tmp"} {
		// TODO(@daixiang0): add Windows support.
		if runtime.GOOS == "windows" && socket != "" {
			continue
		}
		for _, tc := range testCases {
			t.Run(fmt.Sprintf("%s get, socket: %v", tc.name, socket), func(t *testing.T) {
				if socket != "" {
					ts, l := getTestSocketServer(tc.expectedPath, tc.resp, tc.appID, socket)
					go ts.Serve(l)
					defer func() {
						l.Close()
						for _, protocol := range []string{"http", "grpc"} {
							os.Remove(utils.GetSocket(socket, tc.appID, protocol))
						}
					}()
				} else {
					ts, port := getTestServer(tc.expectedPath, tc.resp)
					ts.Start()
					defer ts.Close()
					tc.lo.HTTPPort = port
				}

				client := &Standalone{
					process: &mockDaprProcess{
						Lo: []ListOutput{
							tc.lo,
						},
						Err: tc.listErr,
					},
				}

				res, err := client.Invoke(tc.appID, tc.method, []byte(tc.resp), "GET", socket)
				if tc.errorExpected {
					assert.Error(t, err, "expected an error")
					assert.Equal(t, tc.errString, err.Error(), "expected error strings to match")
				} else {
					assert.NoError(t, err, "expected no error")
					assert.Equal(t, tc.resp, res, "expected response to match")
				}
			})

			t.Run(fmt.Sprintf("%s post, socket: %v", tc.name, socket), func(t *testing.T) {
				if socket != "" {
					ts, l := getTestSocketServer(tc.expectedPath, tc.resp, tc.appID, socket)
					go ts.Serve(l)
					defer func() {
						l.Close()
						for _, protocol := range []string{"http", "grpc"} {
							os.Remove(utils.GetSocket(socket, tc.appID, protocol))
						}
					}()
				} else {
					ts, port := getTestServer(tc.expectedPath, tc.resp)
					ts.Start()
					defer ts.Close()
					tc.lo.HTTPPort = port
				}
				client := &Standalone{
					process: &mockDaprProcess{
						Lo:  []ListOutput{tc.lo},
						Err: tc.listErr,
					},
				}
				res, err := client.Invoke(tc.appID, tc.method, []byte(tc.resp), "POST", socket)
				if tc.errorExpected {
					assert.Error(t, err, "expected an error")
					assert.Equal(t, tc.errString, err.Error(), "expected error strings to match")
				} else {
					assert.NoError(t, err, "expected no error")
					assert.Equal(t, tc.resp, res, "expected response to match")
				}
			})

			t.Run(fmt.Sprintf("%s delete, socket: %v", tc.name, socket), func(t *testing.T) {
				if socket != "" {
					ts, l := getTestSocketServer(tc.expectedPath, tc.resp, tc.appID, socket)
					go ts.Serve(l)
					defer func() {
						l.Close()
						for _, protocol := range []string{"http", "grpc"} {
							os.Remove(utils.GetSocket(socket, tc.appID, protocol))
						}
					}()
				} else {
					ts, port := getTestServer(tc.expectedPath, tc.resp)
					ts.Start()
					defer ts.Close()
					tc.lo.HTTPPort = port
				}
				client := &Standalone{
					process: &mockDaprProcess{
						Lo:  []ListOutput{tc.lo},
						Err: tc.listErr,
					},
				}
				res, err := client.Invoke(tc.appID, tc.method, []byte(tc.resp), "DELETE", socket)
				if tc.errorExpected {
					assert.Error(t, err, "expected an error")
					assert.Equal(t, tc.errString, err.Error(), "expected error strings to match")
				} else {
					assert.NoError(t, err, "expected no error")
					assert.Equal(t, tc.resp, res, "expected response to match")
				}
			})

			t.Run(fmt.Sprintf("%s put, socket: %v", tc.name, socket), func(t *testing.T) {
				if socket != "" {
					ts, l := getTestSocketServer(tc.expectedPath, tc.resp, tc.appID, socket)
					go ts.Serve(l)
					defer func() {
						l.Close()
						for _, protocol := range []string{"http", "grpc"} {
							os.Remove(utils.GetSocket(socket, tc.appID, protocol))
						}
					}()
				} else {
					ts, port := getTestServer(tc.expectedPath, tc.resp)
					ts.Start()
					defer ts.Close()
					tc.lo.HTTPPort = port
				}

				client := &Standalone{
					process: &mockDaprProcess{
						Lo:  []ListOutput{tc.lo},
						Err: tc.listErr,
					},
				}
				res, err := client.Invoke(tc.appID, tc.method, []byte(tc.resp), "PUT", socket)
				if tc.errorExpected {
					assert.Error(t, err, "expected an error")
					assert.Equal(t, tc.errString, err.Error(), "expected error strings to match")
				} else {
					assert.NoError(t, err, "expected no error")
					assert.Equal(t, tc.resp, res, "expected response to match")
				}
			})
		}
	}
}