// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0

package command

import (
	"strings"
	"testing"

	"github.com/hashicorp/nomad/api"
	"github.com/hashicorp/nomad/ci"
	"github.com/hashicorp/nomad/command/agent"
	"github.com/hashicorp/nomad/nomad/mock"
	structs "github.com/hashicorp/nomad/nomad/structs"
	"github.com/mitchellh/cli"
	"github.com/posener/complete"
	"github.com/shoenig/test/must"
	"github.com/stretchr/testify/assert"
)

func TestJobRevertCommand_Implements(t *testing.T) {
	ci.Parallel(t)
	var _ cli.Command = &JobDispatchCommand{}
}

func TestJobRevertCommand_Fails(t *testing.T) {
	ci.Parallel(t)
	ui := cli.NewMockUi()
	cmd := &JobRevertCommand{Meta: Meta{Ui: ui}}

	// Fails on misuse
	if code := cmd.Run([]string{"some", "bad", "args"}); code != 1 {
		t.Fatalf("expected exit code 1, got: %d", code)
	}
	if out := ui.ErrorWriter.String(); !strings.Contains(out, commandErrorText(cmd)) {
		t.Fatalf("expected help output, got: %s", out)
	}
	ui.ErrorWriter.Reset()

	if code := cmd.Run([]string{"-address=nope", "foo", "1"}); code != 1 {
		t.Fatalf("expected exit code 1, got: %d", code)
	}
	if out := ui.ErrorWriter.String(); !strings.Contains(out, "Error querying job prefix") {
		t.Fatalf("expected failed query error, got: %s", out)
	}
	ui.ErrorWriter.Reset()
}

func TestJobRevertCommand_AutocompleteArgs(t *testing.T) {
	ci.Parallel(t)
	assert := assert.New(t)

	srv, _, url := testServer(t, true, nil)
	defer srv.Shutdown()

	ui := cli.NewMockUi()
	cmd := &JobRevertCommand{Meta: Meta{Ui: ui, flagAddress: url}}

	// Create a fake job
	state := srv.Agent.Server().State()
	j := mock.Job()
	assert.Nil(state.UpsertJob(structs.MsgTypeTestSetup, 1000, nil, j))

	prefix := j.ID[:len(j.ID)-5]
	args := complete.Args{Last: prefix}
	predictor := cmd.AutocompleteArgs()

	res := predictor.Predict(args)
	assert.Equal(1, len(res))
	assert.Equal(j.ID, res[0])
}

func TestJobRevertCommand_ACL(t *testing.T) {
	ci.Parallel(t)

	// Start server with ACL enabled.
	srv, client, url := testServer(t, true, func(c *agent.Config) {
		c.ACL.Enabled = true
	})
	defer srv.Shutdown()

	testCases := []struct {
		name        string
		jobPrefix   bool
		aclPolicy   string
		expectedErr string
	}{
		{
			name:        "no token",
			aclPolicy:   "",
			expectedErr: api.PermissionDeniedErrorContent,
		},
		{
			name: "missing submit-job",
			aclPolicy: `
namespace "default" {
	capabilities = ["read-job"]
}
`,
			expectedErr: api.PermissionDeniedErrorContent,
		},
		{
			name: "submit-job allowed but can't monitor eval without read-job",
			aclPolicy: `
namespace "default" {
	capabilities = ["submit-job"]
}
`,
			expectedErr: "No evaluation with id",
		},
		{
			name: "submit-job allowed and can monitor eval with read-job",
			aclPolicy: `
namespace "default" {
	capabilities = ["read-job", "submit-job"]
}
`,
		},
		{
			name:      "job prefix requires list-job",
			jobPrefix: true,
			aclPolicy: `
namespace "default" {
	capabilities = ["submit-job"]
}
`,
			expectedErr: "not found",
		},
		{
			name:      "job prefix works with list-job but can't monitor eval without read-job",
			jobPrefix: true,
			aclPolicy: `
namespace "default" {
	capabilities = ["submit-job", "list-jobs"]
}
`,
			expectedErr: "No evaluation with id",
		},
		{
			name:      "job prefix works with list-job and can monitor eval with read-job",
			jobPrefix: true,
			aclPolicy: `
namespace "default" {
	capabilities = ["read-job", "submit-job", "list-jobs"]
}
`,
		},
	}

	for i, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			ui := cli.NewMockUi()
			cmd := &JobRevertCommand{Meta: Meta{Ui: ui}}
			args := []string{
				"-address", url,
			}

			// Create a job.
			job := mock.MinJob()
			state := srv.Agent.Server().State()
			err := state.UpsertJob(structs.MsgTypeTestSetup, uint64(300+i), nil, job)
			must.NoError(t, err)
			defer func() {
				client.Jobs().Deregister(job.ID, true, &api.WriteOptions{
					AuthToken: srv.RootToken.SecretID,
				})
			}()

			// Modify job to create new version.
			newJob := job.Copy()
			newJob.Meta = map[string]string{
				"test": tc.name,
			}
			newJob.Version = uint64(i)
			err = state.UpsertJob(structs.MsgTypeTestSetup, uint64(301+i), nil, newJob)
			must.NoError(t, err)

			if tc.aclPolicy != "" {
				// Create ACL token with test case policy and add it to the
				// command.
				policyName := nonAlphaNum.ReplaceAllString(tc.name, "-")
				token := mock.CreatePolicyAndToken(t, state, uint64(302+i), policyName, tc.aclPolicy)
				args = append(args, "-token", token.SecretID)
			}

			// Add job ID or job ID prefix to the command.
			if tc.jobPrefix {
				args = append(args, job.ID[:3])
			} else {
				args = append(args, job.ID)
			}

			// Run command reverting job to version 0.
			args = append(args, "0")
			code := cmd.Run(args)
			if tc.expectedErr == "" {
				must.Zero(t, code)
			} else {
				must.One(t, code)
				must.StrContains(t, ui.ErrorWriter.String(), tc.expectedErr)
			}
		})
	}
}