package terraform

import (
	"context"
	"path"
	"testing"

	"github.com/hashicorp/terraform-exec/tfexec"
	"github.com/stretchr/testify/assert"
)

func TestSomething(t *testing.T) {
	ctx := context.Background()
	tf, err := newTerraform(ctx, "internal/test/simplest", map[string]string{
		"DATABRICKS_HOST":  "..",
		"DATABRICKS_TOKEN": "..",
	})
	assert.NoError(t, err)

	err = tf.Init(ctx)
	assert.NoError(t, err)

	planLoc := path.Join(t.TempDir(), "tfplan.zip")
	hasChanges, err := tf.Plan(ctx, tfexec.Out(planLoc))
	assert.True(t, hasChanges)
	assert.NoError(t, err)

	plan, err := tf.ShowPlanFile(ctx, planLoc)
	assert.NoError(t, err)
	assert.NotNil(t, plan)

	found := false
	for _, r := range plan.Config.RootModule.Resources {
		// TODO: add validator to prevent non-Databricks resources in *.tf files, as
		// we're not replacing terraform, we're wrapping it up for the average user.
		if r.Type != "databricks_job" {
			continue
		}
		// TODO: validate that libraries on jobs defined in *.tf and libraries 
		// in `install_requires` defined in setup.py are the same. Exist with 
		// the explanatory error otherwise.
		found = true
		// resource "databricks_job" "this"
		assert.Equal(t, "this", r.Name)
		// this is just a PoC to show how to retrieve DBR version from definitions.
		// production code should perform rigorous nil checks...
		nc := r.Expressions["new_cluster"]
		firstBlock := nc.NestedBlocks[0]
		ver := firstBlock["spark_version"].ConstantValue.(string)
		assert.Equal(t, "10.0.1", ver)
	}
	assert.True(t, found)
}