package cli_test

import (
	"fmt"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"golang.org/x/net/context"

	"github.com/coder/coder/v2/cli/clitest"
	"github.com/coder/coder/v2/coderd/coderdtest"
	"github.com/coder/coder/v2/coderd/database"
	"github.com/coder/coder/v2/codersdk"
	"github.com/coder/coder/v2/provisioner/echo"
	"github.com/coder/coder/v2/provisionersdk/proto"
	"github.com/coder/coder/v2/pty/ptytest"
	"github.com/coder/coder/v2/testutil"
)

const (
	ephemeralParameterName        = "ephemeral_parameter"
	ephemeralParameterDescription = "This is ephemeral parameter"
	ephemeralParameterValue       = "3"

	immutableParameterName        = "immutable_parameter"
	immutableParameterDescription = "This is immutable parameter"
	immutableParameterValue       = "abc"
)

func TestStart(t *testing.T) {
	t.Parallel()

	echoResponses := &echo.Responses{
		Parse: echo.ParseComplete,
		ProvisionPlan: []*proto.Response{
			{
				Type: &proto.Response_Plan{
					Plan: &proto.PlanComplete{
						Parameters: []*proto.RichParameter{
							{
								Name:        ephemeralParameterName,
								Description: ephemeralParameterDescription,
								Mutable:     true,
								Ephemeral:   true,
							},
						},
					},
				},
			},
		},
		ProvisionApply: echo.ApplyComplete,
	}

	t.Run("BuildOptions", func(t *testing.T) {
		t.Parallel()

		client := coderdtest.New(t, &coderdtest.Options{IncludeProvisionerDaemon: true})
		user := coderdtest.CreateFirstUser(t, client)
		version := coderdtest.CreateTemplateVersion(t, client, user.OrganizationID, echoResponses)
		coderdtest.AwaitTemplateVersionJobCompleted(t, client, version.ID)
		template := coderdtest.CreateTemplate(t, client, user.OrganizationID, version.ID)
		workspace := coderdtest.CreateWorkspace(t, client, user.OrganizationID, template.ID)
		coderdtest.AwaitWorkspaceBuildJobCompleted(t, client, workspace.LatestBuild.ID)

		inv, root := clitest.New(t, "start", workspace.Name, "--build-options")
		clitest.SetupConfig(t, client, root)
		doneChan := make(chan struct{})
		pty := ptytest.New(t).Attach(inv)
		go func() {
			defer close(doneChan)
			err := inv.Run()
			assert.NoError(t, err)
		}()

		matches := []string{
			ephemeralParameterDescription, ephemeralParameterValue,
			"workspace has been started", "",
		}
		for i := 0; i < len(matches); i += 2 {
			match := matches[i]
			value := matches[i+1]
			pty.ExpectMatch(match)

			if value != "" {
				pty.WriteLine(value)
			}
		}
		<-doneChan

		// Verify if build option is set
		ctx, cancel := context.WithTimeout(context.Background(), testutil.WaitShort)
		defer cancel()

		workspace, err := client.WorkspaceByOwnerAndName(ctx, workspace.OwnerName, workspace.Name, codersdk.WorkspaceOptions{})
		require.NoError(t, err)
		actualParameters, err := client.WorkspaceBuildParameters(ctx, workspace.LatestBuild.ID)
		require.NoError(t, err)
		require.Contains(t, actualParameters, codersdk.WorkspaceBuildParameter{
			Name:  ephemeralParameterName,
			Value: ephemeralParameterValue,
		})
	})

	t.Run("BuildOptionFlags", func(t *testing.T) {
		t.Parallel()

		client := coderdtest.New(t, &coderdtest.Options{IncludeProvisionerDaemon: true})
		user := coderdtest.CreateFirstUser(t, client)
		version := coderdtest.CreateTemplateVersion(t, client, user.OrganizationID, echoResponses)
		coderdtest.AwaitTemplateVersionJobCompleted(t, client, version.ID)
		template := coderdtest.CreateTemplate(t, client, user.OrganizationID, version.ID)
		workspace := coderdtest.CreateWorkspace(t, client, user.OrganizationID, template.ID)
		coderdtest.AwaitWorkspaceBuildJobCompleted(t, client, workspace.LatestBuild.ID)

		inv, root := clitest.New(t, "start", workspace.Name,
			"--build-option", fmt.Sprintf("%s=%s", ephemeralParameterName, ephemeralParameterValue))
		clitest.SetupConfig(t, client, root)
		doneChan := make(chan struct{})
		pty := ptytest.New(t).Attach(inv)
		go func() {
			defer close(doneChan)
			err := inv.Run()
			assert.NoError(t, err)
		}()

		pty.ExpectMatch("workspace has been started")
		<-doneChan

		// Verify if build option is set
		ctx, cancel := context.WithTimeout(context.Background(), testutil.WaitShort)
		defer cancel()

		workspace, err := client.WorkspaceByOwnerAndName(ctx, workspace.OwnerName, workspace.Name, codersdk.WorkspaceOptions{})
		require.NoError(t, err)
		actualParameters, err := client.WorkspaceBuildParameters(ctx, workspace.LatestBuild.ID)
		require.NoError(t, err)
		require.Contains(t, actualParameters, codersdk.WorkspaceBuildParameter{
			Name:  ephemeralParameterName,
			Value: ephemeralParameterValue,
		})
	})
}

func TestStartWithParameters(t *testing.T) {
	t.Parallel()

	echoResponses := &echo.Responses{
		Parse: echo.ParseComplete,
		ProvisionPlan: []*proto.Response{
			{
				Type: &proto.Response_Plan{
					Plan: &proto.PlanComplete{
						Parameters: []*proto.RichParameter{
							{
								Name:        immutableParameterName,
								Description: immutableParameterDescription,
								Required:    true,
							},
						},
					},
				},
			},
		},
		ProvisionApply: echo.ApplyComplete,
	}

	t.Run("DoNotAskForImmutables", func(t *testing.T) {
		t.Parallel()

		// Create the workspace
		client := coderdtest.New(t, &coderdtest.Options{IncludeProvisionerDaemon: true})
		user := coderdtest.CreateFirstUser(t, client)
		version := coderdtest.CreateTemplateVersion(t, client, user.OrganizationID, echoResponses)
		coderdtest.AwaitTemplateVersionJobCompleted(t, client, version.ID)
		template := coderdtest.CreateTemplate(t, client, user.OrganizationID, version.ID)
		workspace := coderdtest.CreateWorkspace(t, client, user.OrganizationID, template.ID, func(cwr *codersdk.CreateWorkspaceRequest) {
			cwr.RichParameterValues = []codersdk.WorkspaceBuildParameter{
				{
					Name:  immutableParameterName,
					Value: immutableParameterValue,
				},
			}
		})
		coderdtest.AwaitWorkspaceBuildJobCompleted(t, client, workspace.LatestBuild.ID)

		// Stop the workspace
		workspaceBuild := coderdtest.CreateWorkspaceBuild(t, client, workspace, database.WorkspaceTransitionStop)
		coderdtest.AwaitWorkspaceBuildJobCompleted(t, client, workspaceBuild.ID)

		// Start the workspace again
		inv, root := clitest.New(t, "start", workspace.Name)
		clitest.SetupConfig(t, client, root)
		doneChan := make(chan struct{})
		pty := ptytest.New(t).Attach(inv)
		go func() {
			defer close(doneChan)
			err := inv.Run()
			assert.NoError(t, err)
		}()

		pty.ExpectMatch("workspace has been started")
		<-doneChan

		// Verify if immutable parameter is set
		ctx, cancel := context.WithTimeout(context.Background(), testutil.WaitShort)
		defer cancel()

		workspace, err := client.WorkspaceByOwnerAndName(ctx, workspace.OwnerName, workspace.Name, codersdk.WorkspaceOptions{})
		require.NoError(t, err)
		actualParameters, err := client.WorkspaceBuildParameters(ctx, workspace.LatestBuild.ID)
		require.NoError(t, err)
		require.Contains(t, actualParameters, codersdk.WorkspaceBuildParameter{
			Name:  immutableParameterName,
			Value: immutableParameterValue,
		})
	})
}