package terraform

import (
	"errors"
	"testing"

	"github.com/hashicorp/terraform/addrs"
	"github.com/hashicorp/terraform/configs/configschema"
	"github.com/hashicorp/terraform/plans"
	"github.com/hashicorp/terraform/providers"
	"github.com/hashicorp/terraform/states"
	"github.com/zclconf/go-cty/cty"
)

func TestContext2Plan_removedDuringRefresh(t *testing.T) {
	// The resource was added to state but actually failed to create and was
	// left tainted. This should be removed during plan and result in a Create
	// action.
	m := testModuleInline(t, map[string]string{
		"main.tf": `
resource "test_object" "a" {
}
`,
	})

	p := simpleMockProvider()
	p.ReadResourceFn = func(req providers.ReadResourceRequest) (resp providers.ReadResourceResponse) {
		resp.NewState = cty.NullVal(req.PriorState.Type())
		return resp
	}

	addr := mustResourceInstanceAddr("test_object.a")
	state := states.BuildState(func(s *states.SyncState) {
		s.SetResourceInstanceCurrent(addr, &states.ResourceInstanceObjectSrc{
			AttrsJSON: []byte(`{"test_string":"foo"}`),
			Status:    states.ObjectTainted,
		}, mustProviderConfig(`provider["registry.terraform.io/hashicorp/test"]`))
	})

	ctx := testContext2(t, &ContextOpts{
		Config: m,
		State:  state,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("test"): testProviderFuncFixed(p),
		},
	})

	plan, diags := ctx.Plan()
	if diags.HasErrors() {
		t.Fatal(diags.Err())
	}

	for _, c := range plan.Changes.Resources {
		if c.Action != plans.Create {
			t.Fatalf("expected Create action for missing %s, got %s", c.Addr, c.Action)
		}
	}
}

func TestContext2Plan_noChangeDataSourceSensitiveNestedSet(t *testing.T) {
	m := testModuleInline(t, map[string]string{
		"main.tf": `
variable "bar" {
  sensitive = true
  default   = "baz"
}

data "test_data_source" "foo" {
  foo {
    bar = var.bar
  }
}
`,
	})

	p := new(MockProvider)
	p.GetProviderSchemaResponse = getProviderSchemaResponseFromProviderSchema(&ProviderSchema{
		DataSources: map[string]*configschema.Block{
			"test_data_source": {
				Attributes: map[string]*configschema.Attribute{
					"id": {
						Type:     cty.String,
						Computed: true,
					},
				},
				BlockTypes: map[string]*configschema.NestedBlock{
					"foo": {
						Block: configschema.Block{
							Attributes: map[string]*configschema.Attribute{
								"bar": {Type: cty.String, Optional: true},
							},
						},
						Nesting: configschema.NestingSet,
					},
				},
			},
		},
	})

	p.ReadDataSourceResponse = &providers.ReadDataSourceResponse{
		State: cty.ObjectVal(map[string]cty.Value{
			"id":  cty.StringVal("data_id"),
			"foo": cty.SetVal([]cty.Value{cty.ObjectVal(map[string]cty.Value{"bar": cty.StringVal("baz")})}),
		}),
	}

	state := states.NewState()
	root := state.EnsureModule(addrs.RootModuleInstance)
	root.SetResourceInstanceCurrent(
		mustResourceInstanceAddr("data.test_data_source.foo").Resource,
		&states.ResourceInstanceObjectSrc{
			Status:    states.ObjectReady,
			AttrsJSON: []byte(`{"id":"data_id", "foo":[{"bar":"baz"}]}`),
			AttrSensitivePaths: []cty.PathValueMarks{
				{
					Path:  cty.GetAttrPath("foo"),
					Marks: cty.NewValueMarks("sensitive"),
				},
			},
		},
		mustProviderConfig(`provider["registry.terraform.io/hashicorp/test"]`),
	)

	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("test"): testProviderFuncFixed(p),
		},
		State: state,
	})

	plan, diags := ctx.Plan()
	if diags.HasErrors() {
		t.Fatal(diags.ErrWithWarnings())
	}

	for _, res := range plan.Changes.Resources {
		if res.Action != plans.NoOp {
			t.Fatalf("expected NoOp, got: %q %s", res.Addr, res.Action)
		}
	}
}

func TestContext2Plan_orphanDataInstance(t *testing.T) {
	// ensure the planned replacement of the data source is evaluated properly
	m := testModuleInline(t, map[string]string{
		"main.tf": `
data "test_object" "a" {
  for_each = { new = "ok" }
}

output "out" {
  value = [ for k, _ in data.test_object.a: k ]
}
`,
	})

	p := simpleMockProvider()
	p.ReadDataSourceFn = func(req providers.ReadDataSourceRequest) (resp providers.ReadDataSourceResponse) {
		resp.State = req.Config
		return resp
	}

	state := states.BuildState(func(s *states.SyncState) {
		s.SetResourceInstanceCurrent(mustResourceInstanceAddr(`data.test_object.a["old"]`), &states.ResourceInstanceObjectSrc{
			AttrsJSON: []byte(`{"test_string":"foo"}`),
			Status:    states.ObjectReady,
		}, mustProviderConfig(`provider["registry.terraform.io/hashicorp/test"]`))
	})

	ctx := testContext2(t, &ContextOpts{
		Config: m,
		State:  state,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("test"): testProviderFuncFixed(p),
		},
	})

	plan, diags := ctx.Plan()
	if diags.HasErrors() {
		t.Fatal(diags.Err())
	}

	change, err := plan.Changes.Outputs[0].Decode()
	if err != nil {
		t.Fatal(err)
	}

	expected := cty.TupleVal([]cty.Value{cty.StringVal("new")})

	if change.After.Equals(expected).False() {
		t.Fatalf("expected %#v, got %#v\n", expected, change.After)
	}
}

func TestContext2Plan_basicConfigurationAliases(t *testing.T) {
	m := testModuleInline(t, map[string]string{
		"main.tf": `
provider "test" {
  alias = "z"
  test_string = "config"
}

module "mod" {
  source = "./mod"
  providers = {
    test.x = test.z
  }
}
`,

		"mod/main.tf": `
terraform {
  required_providers {
    test = {
      source = "registry.terraform.io/hashicorp/test"
      configuration_aliases = [ test.x ]
	}
  }
}

resource "test_object" "a" {
  provider = test.x
}

`,
	})

	p := simpleMockProvider()

	// The resource within the module should be using the provider configured
	// from the root module. We should never see an empty configuration.
	p.ConfigureProviderFn = func(req providers.ConfigureProviderRequest) (resp providers.ConfigureProviderResponse) {
		if req.Config.GetAttr("test_string").IsNull() {
			resp.Diagnostics = resp.Diagnostics.Append(errors.New("missing test_string value"))
		}
		return resp
	}

	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("test"): testProviderFuncFixed(p),
		},
	})

	_, diags := ctx.Plan()
	if diags.HasErrors() {
		t.Fatal(diags.Err())
	}
}