package terraform

import (
	"fmt"
	"strings"
	"testing"

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

func TestContextImport_basic(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-provider")
	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
		},
	})

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if diags.HasErrors() {
		t.Fatalf("unexpected errors: %s", diags.Err())
	}
	actual := strings.TrimSpace(state.String())
	expected := strings.TrimSpace(testImportStr)
	if actual != expected {
		t.Fatalf("bad: \n%s", actual)
	}
}

func TestContextImport_countIndex(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-provider")
	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
		},
	})

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.IntKey(0),
				),
				ID: "bar",
			},
		},
	})
	if diags.HasErrors() {
		t.Fatalf("unexpected errors: %s", diags.Err())
	}

	actual := strings.TrimSpace(state.String())
	expected := strings.TrimSpace(testImportCountIndexStr)
	if actual != expected {
		t.Fatalf("bad: \n%s", actual)
	}
}

func TestContextImport_collision(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-provider")
	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
		},

		State: states.BuildState(func(s *states.SyncState) {
			s.SetResourceInstanceCurrent(
				addrs.Resource{
					Mode: addrs.ManagedResourceMode,
					Type: "aws_instance",
					Name: "foo",
				}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
				&states.ResourceInstanceObjectSrc{
					AttrsFlat: map[string]string{
						"id": "bar",
					},
					Status: states.ObjectReady,
				},
				addrs.AbsProviderConfig{
					Provider: addrs.NewDefaultProvider("aws"),
					Module:   addrs.RootModule,
				},
			)
		}),
	})

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if !diags.HasErrors() {
		t.Fatalf("succeeded; want an error indicating that the resource already exists in state")
	}

	actual := strings.TrimSpace(state.String())
	expected := `aws_instance.foo:
  ID = bar
  provider = provider["registry.terraform.io/hashicorp/aws"]`

	if actual != expected {
		t.Fatalf("bad: \n%s", actual)
	}
}

func TestContextImport_missingType(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-provider")

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID: "foo",
		},
	}

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

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if !diags.HasErrors() {
		t.Fatal("should error")
	}

	actual := strings.TrimSpace(state.String())
	expected := "<no state>"
	if actual != expected {
		t.Fatalf("bad: \n%s", actual)
	}
}

func TestContextImport_moduleProvider(t *testing.T) {
	p := testProvider("aws")

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	configured := false
	p.ConfigureFn = func(c *ResourceConfig) error {
		configured = true

		if v, ok := c.Get("foo"); !ok || v.(string) != "bar" {
			return fmt.Errorf("bad")
		}

		return nil
	}

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

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if diags.HasErrors() {
		t.Fatalf("unexpected errors: %s", diags.Err())
	}

	if !configured {
		t.Fatal("didn't configure provider")
	}

	actual := strings.TrimSpace(state.String())
	expected := strings.TrimSpace(testImportStr)
	if actual != expected {
		t.Fatalf("expected:\n%s\n\ngot:\n%s", expected, actual)
	}
}

// Importing into a module requires a provider config in that module.
func TestContextImport_providerModule(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-module")
	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
		},
	})

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	configured := false
	p.ConfigureFn = func(c *ResourceConfig) error {
		configured = true

		if v, ok := c.Get("foo"); !ok || v.(string) != "bar" {
			return fmt.Errorf("bad")
		}

		return nil
	}

	_, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.Child("child", addrs.NoKey).ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if diags.HasErrors() {
		t.Fatalf("unexpected errors: %s", diags.Err())
	}

	if !configured {
		t.Fatal("didn't configure provider")
	}
}

// Test that import will interpolate provider configuration and use
// that configuration for import.
func TestContextImport_providerConfig(t *testing.T) {
	testCases := map[string]struct {
		module string
		value  string
	}{
		"variables": {
			module: "import-provider-vars",
			value:  "bar",
		},
		"locals": {
			module: "import-provider-locals",
			value:  "baz-bar",
		},
	}
	for name, test := range testCases {
		t.Run(name, func(t *testing.T) {
			p := testProvider("aws")
			m := testModule(t, test.module)
			ctx := testContext2(t, &ContextOpts{
				Config: m,
				Providers: map[addrs.Provider]providers.Factory{
					addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
				},
				Variables: InputValues{
					"foo": &InputValue{
						Value:      cty.StringVal("bar"),
						SourceType: ValueFromCaller,
					},
				},
			})

			p.ImportStateReturn = []*InstanceState{
				&InstanceState{
					ID:        "foo",
					Ephemeral: EphemeralState{Type: "aws_instance"},
				},
			}

			state, diags := ctx.Import(&ImportOpts{
				Targets: []*ImportTarget{
					&ImportTarget{
						Addr: addrs.RootModuleInstance.ResourceInstance(
							addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
						),
						ID: "bar",
					},
				},
			})
			if diags.HasErrors() {
				t.Fatalf("unexpected errors: %s", diags.Err())
			}

			if !p.ConfigureCalled {
				t.Fatal("didn't configure provider")
			}

			if foo := p.ConfigureRequest.Config.GetAttr("foo").AsString(); foo != test.value {
				t.Fatalf("bad value %#v; want %#v", foo, test.value)
			}

			actual := strings.TrimSpace(state.String())
			expected := strings.TrimSpace(testImportStr)
			if actual != expected {
				t.Fatalf("bad: \n%s", actual)
			}
		})
	}
}

// Test that provider configs can't reference resources.
func TestContextImport_providerConfigResources(t *testing.T) {
	p := testProvider("aws")
	pTest := testProvider("test")
	m := testModule(t, "import-provider-resources")
	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("aws"):  testProviderFuncFixed(p),
			addrs.NewDefaultProvider("test"): testProviderFuncFixed(pTest),
		},
	})

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	_, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if !diags.HasErrors() {
		t.Fatal("should error")
	}
	if got, want := diags.Err().Error(), `The configuration for provider["registry.terraform.io/hashicorp/aws"] depends on values that cannot be determined until apply.`; !strings.Contains(got, want) {
		t.Errorf("wrong error\n got: %s\nwant: %s", got, want)
	}
}

func TestContextImport_refresh(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-provider")
	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
		},
	})

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	p.ReadResourceFn = nil

	p.ReadResourceResponse = providers.ReadResourceResponse{
		NewState: cty.ObjectVal(map[string]cty.Value{
			"id":  cty.StringVal("foo"),
			"foo": cty.StringVal("bar"),
		}),
	}

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if diags.HasErrors() {
		t.Fatalf("unexpected errors: %s", diags.Err())
	}

	actual := strings.TrimSpace(state.String())
	expected := strings.TrimSpace(testImportRefreshStr)
	if actual != expected {
		t.Fatalf("bad: \n%s", actual)
	}
}

func TestContextImport_refreshNil(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-provider")
	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
		},
	})

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	p.ReadResourceFn = func(req providers.ReadResourceRequest) providers.ReadResourceResponse {
		return providers.ReadResourceResponse{
			NewState: cty.NullVal(cty.DynamicPseudoType),
		}
	}

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if !diags.HasErrors() {
		t.Fatal("should error")
	}

	actual := strings.TrimSpace(state.String())
	expected := "<no state>"
	if actual != expected {
		t.Fatalf("bad: \n%s", actual)
	}
}

func TestContextImport_module(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-module")
	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
		},
	})

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.Child("child", addrs.IntKey(0)).ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if diags.HasErrors() {
		t.Fatalf("unexpected errors: %s", diags.Err())
	}

	actual := strings.TrimSpace(state.String())
	expected := strings.TrimSpace(testImportModuleStr)
	if actual != expected {
		t.Fatalf("bad: \n%s", actual)
	}
}

func TestContextImport_moduleDepth2(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-module")
	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
		},
	})

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.Child("child", addrs.IntKey(0)).Child("nested", addrs.NoKey).ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "baz",
			},
		},
	})
	if diags.HasErrors() {
		t.Fatalf("unexpected errors: %s", diags.Err())
	}

	actual := strings.TrimSpace(state.String())
	expected := strings.TrimSpace(testImportModuleDepth2Str)
	if actual != expected {
		t.Fatalf("bad: \n%s", actual)
	}
}

func TestContextImport_moduleDiff(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-module")
	ctx := testContext2(t, &ContextOpts{
		Config: m,
		Providers: map[addrs.Provider]providers.Factory{
			addrs.NewDefaultProvider("aws"): testProviderFuncFixed(p),
		},
	})

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
	}

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.Child("child", addrs.IntKey(0)).ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "baz",
			},
		},
	})
	if diags.HasErrors() {
		t.Fatalf("unexpected errors: %s", diags.Err())
	}

	actual := strings.TrimSpace(state.String())
	expected := strings.TrimSpace(testImportModuleStr)
	if actual != expected {
		t.Fatalf("\nexpected: %q\ngot:      %q\n", expected, actual)
	}
}

func TestContextImport_multiState(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-provider")

	p.GetSchemaReturn = &ProviderSchema{
		Provider: &configschema.Block{
			Attributes: map[string]*configschema.Attribute{
				"foo": {Type: cty.String, Optional: true},
			},
		},
		ResourceTypes: map[string]*configschema.Block{
			"aws_instance": {
				Attributes: map[string]*configschema.Attribute{
					"id": {Type: cty.String, Computed: true},
				},
			},
			"aws_instance_thing": {
				Attributes: map[string]*configschema.Attribute{
					"id": {Type: cty.String, Computed: true},
				},
			},
		},
	}

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
		&InstanceState{
			ID:        "bar",
			Ephemeral: EphemeralState{Type: "aws_instance_thing"},
		},
	}

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

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if diags.HasErrors() {
		t.Fatalf("unexpected errors: %s", diags.Err())
	}

	actual := strings.TrimSpace(state.String())
	expected := strings.TrimSpace(testImportMultiStr)
	if actual != expected {
		t.Fatalf("bad: \n%s", actual)
	}
}

func TestContextImport_multiStateSame(t *testing.T) {
	p := testProvider("aws")
	m := testModule(t, "import-provider")

	p.GetSchemaReturn = &ProviderSchema{
		Provider: &configschema.Block{
			Attributes: map[string]*configschema.Attribute{
				"foo": {Type: cty.String, Optional: true},
			},
		},
		ResourceTypes: map[string]*configschema.Block{
			"aws_instance": {
				Attributes: map[string]*configschema.Attribute{
					"id": {Type: cty.String, Computed: true},
				},
			},
			"aws_instance_thing": {
				Attributes: map[string]*configschema.Attribute{
					"id": {Type: cty.String, Computed: true},
				},
			},
		},
	}

	p.ImportStateReturn = []*InstanceState{
		&InstanceState{
			ID:        "foo",
			Ephemeral: EphemeralState{Type: "aws_instance"},
		},
		&InstanceState{
			ID:        "bar",
			Ephemeral: EphemeralState{Type: "aws_instance_thing"},
		},
		&InstanceState{
			ID:        "qux",
			Ephemeral: EphemeralState{Type: "aws_instance_thing"},
		},
	}

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

	state, diags := ctx.Import(&ImportOpts{
		Targets: []*ImportTarget{
			&ImportTarget{
				Addr: addrs.RootModuleInstance.ResourceInstance(
					addrs.ManagedResourceMode, "aws_instance", "foo", addrs.NoKey,
				),
				ID: "bar",
			},
		},
	})
	if diags.HasErrors() {
		t.Fatalf("unexpected errors: %s", diags.Err())
	}

	actual := strings.TrimSpace(state.String())
	expected := strings.TrimSpace(testImportMultiSameStr)
	if actual != expected {
		t.Fatalf("bad: \n%s", actual)
	}
}

const testImportStr = `
aws_instance.foo:
  ID = foo
  provider = provider["registry.terraform.io/hashicorp/aws"]
`

const testImportCountIndexStr = `
aws_instance.foo.0:
  ID = foo
  provider = provider["registry.terraform.io/hashicorp/aws"]
`

const testImportModuleStr = `
<no state>
module.child[0]:
  aws_instance.foo:
    ID = foo
    provider = provider["registry.terraform.io/hashicorp/aws"]
`

const testImportModuleDepth2Str = `
<no state>
module.child[0].nested:
  aws_instance.foo:
    ID = foo
    provider = provider["registry.terraform.io/hashicorp/aws"]
`

const testImportModuleExistingStr = `
<no state>
module.foo:
  aws_instance.bar:
    ID = bar
    provider = provider["registry.terraform.io/hashicorp/aws"]
  aws_instance.foo:
    ID = foo
    provider = provider["registry.terraform.io/hashicorp/aws"]
`

const testImportMultiStr = `
aws_instance.foo:
  ID = foo
  provider = provider["registry.terraform.io/hashicorp/aws"]
aws_instance_thing.foo:
  ID = bar
  provider = provider["registry.terraform.io/hashicorp/aws"]
`

const testImportMultiSameStr = `
aws_instance.foo:
  ID = foo
  provider = provider["registry.terraform.io/hashicorp/aws"]
aws_instance_thing.foo:
  ID = bar
  provider = provider["registry.terraform.io/hashicorp/aws"]
aws_instance_thing.foo-1:
  ID = qux
  provider = provider["registry.terraform.io/hashicorp/aws"]
`

const testImportRefreshStr = `
aws_instance.foo:
  ID = foo
  provider = provider["registry.terraform.io/hashicorp/aws"]
  foo = bar
`