/*
Copyright (c) Edgeless Systems GmbH
SPDX-License-Identifier: AGPL-3.0-only
*/

package cmd

import (
	"bytes"
	"strings"
	"testing"

	"github.com/edgelesssys/constellation/v2/cli/internal/iamid"
	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
	"github.com/edgelesssys/constellation/v2/internal/config"
	"github.com/edgelesssys/constellation/v2/internal/constants"
	"github.com/edgelesssys/constellation/v2/internal/file"
	"github.com/spf13/afero"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestIAMCreateAWS(t *testing.T) {
	defaultFs := func(require *require.Assertions, provider cloudprovider.Provider, existingFiles []string) afero.Fs {
		fs := afero.NewMemMapFs()
		fileHandler := file.NewHandler(fs)
		for _, f := range existingFiles {
			require.NoError(fileHandler.Write(f, []byte{1, 2, 3}, file.OptNone))
		}
		return fs
	}
	readOnlyFs := func(require *require.Assertions, provider cloudprovider.Provider, existingFiles []string) afero.Fs {
		fs := afero.NewReadOnlyFs(afero.NewMemMapFs())
		return fs
	}
	validIAMIDFile := iamid.File{
		CloudProvider: cloudprovider.AWS,
		AWSOutput: iamid.AWSFile{
			ControlPlaneInstanceProfile: "test_control_plane_instance_profile",
			WorkerNodeInstanceProfile:   "test_worker_nodes_instance_profile",
		},
	}

	testCases := map[string]struct {
		setupFs            func(require *require.Assertions, provider cloudprovider.Provider, existingFiles []string) afero.Fs
		creator            *stubIAMCreator
		provider           cloudprovider.Provider
		zoneFlag           string
		prefixFlag         string
		yesFlag            bool
		generateConfigFlag bool
		configFlag         string
		existingFiles      []string
		stdin              string
		wantAbort          bool
		wantErr            bool
	}{
		"iam create aws": {
			setupFs:    defaultFs,
			creator:    &stubIAMCreator{id: validIAMIDFile},
			provider:   cloudprovider.AWS,
			zoneFlag:   "us-east-2a",
			prefixFlag: "test",
			yesFlag:    true,
		},
		"iam create aws generate config": {
			setupFs:            defaultFs,
			creator:            &stubIAMCreator{id: validIAMIDFile},
			provider:           cloudprovider.AWS,
			zoneFlag:           "us-east-2a",
			prefixFlag:         "test",
			yesFlag:            true,
			configFlag:         constants.ConfigFilename,
			generateConfigFlag: true,
		},
		"iam create aws generate config custom path": {
			setupFs:            defaultFs,
			creator:            &stubIAMCreator{id: validIAMIDFile},
			provider:           cloudprovider.AWS,
			zoneFlag:           "us-east-2a",
			prefixFlag:         "test",
			yesFlag:            true,
			generateConfigFlag: true,
			configFlag:         "custom-config.yaml",
		},
		"iam create aws generate config path already exists": {
			setupFs:            defaultFs,
			creator:            &stubIAMCreator{id: validIAMIDFile},
			provider:           cloudprovider.AWS,
			zoneFlag:           "us-east-2a",
			prefixFlag:         "test",
			yesFlag:            true,
			generateConfigFlag: true,
			wantErr:            true,
			configFlag:         constants.ConfigFilename,
			existingFiles:      []string{constants.ConfigFilename},
		},
		"iam create aws generate config custom path already exists": {
			setupFs:            defaultFs,
			creator:            &stubIAMCreator{id: validIAMIDFile},
			provider:           cloudprovider.AWS,
			zoneFlag:           "us-east-2a",
			prefixFlag:         "test",
			yesFlag:            true,
			generateConfigFlag: true,
			wantErr:            true,
			configFlag:         "custom-config.yaml",
			existingFiles:      []string{"custom-config.yaml"},
		},
		"interactive": {
			setupFs:    defaultFs,
			creator:    &stubIAMCreator{id: validIAMIDFile},
			provider:   cloudprovider.AWS,
			zoneFlag:   "us-east-2a",
			prefixFlag: "test",
			stdin:      "yes\n",
		},
		"interactive generate config": {
			setupFs:            defaultFs,
			creator:            &stubIAMCreator{id: validIAMIDFile},
			provider:           cloudprovider.AWS,
			zoneFlag:           "us-east-2a",
			prefixFlag:         "test",
			stdin:              "yes\n",
			configFlag:         constants.ConfigFilename,
			generateConfigFlag: true,
		},
		"interactive abort": {
			setupFs:    defaultFs,
			creator:    &stubIAMCreator{id: validIAMIDFile},
			provider:   cloudprovider.AWS,
			zoneFlag:   "us-east-2a",
			prefixFlag: "test",
			stdin:      "no\n",
			wantAbort:  true,
		},
		"interactive generate config abort": {
			setupFs:            defaultFs,
			creator:            &stubIAMCreator{id: validIAMIDFile},
			provider:           cloudprovider.AWS,
			zoneFlag:           "us-east-2a",
			prefixFlag:         "test",
			stdin:              "no\n",
			generateConfigFlag: true,
			configFlag:         constants.ConfigFilename,
			wantAbort:          true,
		},
		"invalid zone": {
			setupFs:    defaultFs,
			creator:    &stubIAMCreator{id: validIAMIDFile},
			provider:   cloudprovider.AWS,
			zoneFlag:   "us-west-5b",
			prefixFlag: "test",
			yesFlag:    true,
			wantErr:    true,
		},
		"unwritable fs": {
			setupFs:            readOnlyFs,
			creator:            &stubIAMCreator{id: validIAMIDFile},
			provider:           cloudprovider.AWS,
			zoneFlag:           "us-east-2a",
			prefixFlag:         "test",
			yesFlag:            true,
			generateConfigFlag: true,
			wantErr:            true,
			configFlag:         constants.ConfigFilename,
		},
	}

	for name, tc := range testCases {
		t.Run(name, func(t *testing.T) {
			assert := assert.New(t)
			require := require.New(t)

			cmd := newIAMCreateAWSCmd()
			cmd.SetOut(&bytes.Buffer{})
			cmd.SetErr(&bytes.Buffer{})
			cmd.SetIn(bytes.NewBufferString(tc.stdin))

			cmd.Flags().String("config", constants.ConfigFilename, "") // register persistent flag manually
			cmd.Flags().Bool("generate-config", false, "")             // register persistent flag manually

			if tc.zoneFlag != "" {
				require.NoError(cmd.Flags().Set("zone", tc.zoneFlag))
			}
			if tc.prefixFlag != "" {
				require.NoError(cmd.Flags().Set("prefix", tc.prefixFlag))
			}
			if tc.yesFlag {
				require.NoError(cmd.Flags().Set("yes", "true"))
			}
			if tc.generateConfigFlag {
				require.NoError(cmd.Flags().Set("generate-config", "true"))
			}
			if tc.configFlag != "" {
				require.NoError(cmd.Flags().Set("config", tc.configFlag))
			}

			fileHandler := file.NewHandler(tc.setupFs(require, tc.provider, tc.existingFiles))

			err := iamCreateAWS(cmd, &nopSpinner{}, tc.creator, fileHandler)

			if tc.wantErr {
				assert.Error(err)
				return
			}

			if tc.wantAbort {
				assert.False(tc.creator.createCalled)
				return
			}

			if tc.generateConfigFlag {
				readConfig := &config.Config{}
				readErr := fileHandler.ReadYAML(tc.configFlag, readConfig)
				require.NoError(readErr)
				assert.Equal(tc.creator.id.AWSOutput.ControlPlaneInstanceProfile, readConfig.Provider.AWS.IAMProfileControlPlane)
				assert.Equal(tc.creator.id.AWSOutput.WorkerNodeInstanceProfile, readConfig.Provider.AWS.IAMProfileWorkerNodes)
				assert.Equal(tc.zoneFlag, readConfig.Provider.AWS.Zone)
				assert.True(strings.HasPrefix(readConfig.Provider.AWS.Zone, readConfig.Provider.AWS.Region))
			}
			require.NoError(err)
			assert.True(tc.creator.createCalled)
			assert.Equal(tc.creator.id.AWSOutput, validIAMIDFile.AWSOutput)
		})
	}
}