package mutator_test

import (
	"context"
	"testing"

	"github.com/databricks/cli/bundle"
	"github.com/databricks/cli/bundle/config"
	"github.com/databricks/cli/bundle/config/mutator"
	"github.com/databricks/cli/bundle/config/resources"
	"github.com/databricks/databricks-sdk-go/service/compute"
	"github.com/databricks/databricks-sdk-go/service/jobs"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestOverrideComputeModeDevelopment(t *testing.T) {
	t.Setenv("DATABRICKS_CLUSTER_ID", "")
	b := &bundle.Bundle{
		Config: config.Root{
			Bundle: config.Bundle{
				Mode:      config.Development,
				ClusterId: "newClusterID",
			},
			Resources: config.Resources{
				Jobs: map[string]*resources.Job{
					"job1": {JobSettings: &jobs.JobSettings{
						Name: "job1",
						Tasks: []jobs.Task{
							{
								NewCluster: &compute.ClusterSpec{
									SparkVersion: "14.2.x-scala2.12",
								},
							},
							{
								ExistingClusterId: "cluster2",
							},
							{
								EnvironmentKey: "environment_key",
							},
							{
								JobClusterKey: "cluster_key",
							},
						},
					}},
				},
			},
		},
	}

	m := mutator.OverrideCompute()
	diags := bundle.Apply(context.Background(), b, m)
	require.NoError(t, diags.Error())
	assert.Nil(t, b.Config.Resources.Jobs["job1"].Tasks[0].NewCluster)
	assert.Equal(t, "newClusterID", b.Config.Resources.Jobs["job1"].Tasks[0].ExistingClusterId)
	assert.Equal(t, "newClusterID", b.Config.Resources.Jobs["job1"].Tasks[1].ExistingClusterId)
	assert.Equal(t, "newClusterID", b.Config.Resources.Jobs["job1"].Tasks[2].ExistingClusterId)
	assert.Equal(t, "newClusterID", b.Config.Resources.Jobs["job1"].Tasks[3].ExistingClusterId)

	assert.Nil(t, b.Config.Resources.Jobs["job1"].Tasks[0].NewCluster)
	assert.Empty(t, b.Config.Resources.Jobs["job1"].Tasks[2].EnvironmentKey)
	assert.Empty(t, b.Config.Resources.Jobs["job1"].Tasks[3].JobClusterKey)
}

func TestOverrideComputeModeDefault(t *testing.T) {
	t.Setenv("DATABRICKS_CLUSTER_ID", "newClusterId")
	b := &bundle.Bundle{
		Config: config.Root{
			Bundle: config.Bundle{
				Mode: "",
			},
			Resources: config.Resources{
				Jobs: map[string]*resources.Job{
					"job1": {JobSettings: &jobs.JobSettings{
						Name: "job1",
						Tasks: []jobs.Task{
							{
								NewCluster: &compute.ClusterSpec{},
							},
							{
								ExistingClusterId: "cluster2",
							},
						},
					}},
				},
			},
		},
	}

	m := mutator.OverrideCompute()
	diags := bundle.Apply(context.Background(), b, m)
	require.Empty(t, diags)
	assert.Equal(t, "newClusterId", b.Config.Resources.Jobs["job1"].Tasks[0].ExistingClusterId)
	assert.Equal(t, "newClusterId", b.Config.Resources.Jobs["job1"].Tasks[1].ExistingClusterId)
}

func TestOverrideComputePipelineTask(t *testing.T) {
	t.Setenv("DATABRICKS_CLUSTER_ID", "newClusterId")
	b := &bundle.Bundle{
		Config: config.Root{
			Resources: config.Resources{
				Jobs: map[string]*resources.Job{
					"job1": {JobSettings: &jobs.JobSettings{
						Name: "job1",
						Tasks: []jobs.Task{
							{
								PipelineTask: &jobs.PipelineTask{},
							},
						},
					}},
				},
			},
		},
	}

	m := mutator.OverrideCompute()
	diags := bundle.Apply(context.Background(), b, m)
	require.NoError(t, diags.Error())
	assert.Empty(t, b.Config.Resources.Jobs["job1"].Tasks[0].ExistingClusterId)
}

func TestOverrideComputeForEachTask(t *testing.T) {
	t.Setenv("DATABRICKS_CLUSTER_ID", "newClusterId")
	b := &bundle.Bundle{
		Config: config.Root{
			Resources: config.Resources{
				Jobs: map[string]*resources.Job{
					"job1": {JobSettings: &jobs.JobSettings{
						Name: "job1",
						Tasks: []jobs.Task{
							{
								ForEachTask: &jobs.ForEachTask{},
							},
						},
					}},
				},
			},
		},
	}

	m := mutator.OverrideCompute()
	diags := bundle.Apply(context.Background(), b, m)
	require.NoError(t, diags.Error())
	assert.Empty(t, b.Config.Resources.Jobs["job1"].Tasks[0].ForEachTask.Task)
}

func TestOverrideComputeModeProduction(t *testing.T) {
	b := &bundle.Bundle{
		Config: config.Root{
			Bundle: config.Bundle{
				Mode:      config.Production,
				ClusterId: "newClusterID",
			},
			Resources: config.Resources{
				Jobs: map[string]*resources.Job{
					"job1": {JobSettings: &jobs.JobSettings{
						Name: "job1",
						Tasks: []jobs.Task{
							{
								NewCluster: &compute.ClusterSpec{},
							},
							{
								ExistingClusterId: "cluster2",
							},
						},
					}},
				},
			},
		},
	}

	m := mutator.OverrideCompute()
	diags := bundle.Apply(context.Background(), b, m)
	require.Len(t, diags, 1)
	assert.Equal(t, "overriding compute for a target that uses 'mode: production' is not recommended", diags[0].Summary)
	assert.Equal(t, "newClusterID", b.Config.Resources.Jobs["job1"].Tasks[0].ExistingClusterId)
}

func TestOverrideComputeModeProductionIgnoresVariable(t *testing.T) {
	t.Setenv("DATABRICKS_CLUSTER_ID", "newClusterId")
	b := &bundle.Bundle{
		Config: config.Root{
			Bundle: config.Bundle{
				Mode: config.Production,
			},
			Resources: config.Resources{
				Jobs: map[string]*resources.Job{
					"job1": {JobSettings: &jobs.JobSettings{
						Name: "job1",
						Tasks: []jobs.Task{
							{
								NewCluster: &compute.ClusterSpec{},
							},
							{
								ExistingClusterId: "cluster2",
							},
						},
					}},
				},
			},
		},
	}

	m := mutator.OverrideCompute()
	diags := bundle.Apply(context.Background(), b, m)
	require.Len(t, diags, 1)
	assert.Equal(t, "the DATABRICKS_CLUSTER_ID variable is set but is ignored since the current target uses 'mode: production'", diags[0].Summary)
	assert.Equal(t, "cluster2", b.Config.Resources.Jobs["job1"].Tasks[1].ExistingClusterId)
}