package schema

import (
	"fmt"
	"reflect"
	"testing"
	"time"

	"github.com/google/go-cmp/cmp"
	"github.com/zclconf/go-cty/cty"

	"github.com/hashicorp/terraform/config"
	"github.com/hashicorp/terraform/configs/configschema"
	"github.com/hashicorp/terraform/terraform"
)

func TestProvider_impl(t *testing.T) {
	var _ terraform.ResourceProvider = new(Provider)
}

func TestProviderGetSchema(t *testing.T) {
	// This functionality is already broadly tested in core_schema_test.go,
	// so this is just to ensure that the call passes through correctly.
	p := &Provider{
		Schema: map[string]*Schema{
			"bar": {
				Type:     TypeString,
				Required: true,
			},
		},
		ResourcesMap: map[string]*Resource{
			"foo": &Resource{
				Schema: map[string]*Schema{
					"bar": {
						Type:     TypeString,
						Required: true,
					},
				},
			},
		},
		DataSourcesMap: map[string]*Resource{
			"baz": &Resource{
				Schema: map[string]*Schema{
					"bur": {
						Type:     TypeString,
						Required: true,
					},
				},
			},
		},
	}

	want := &terraform.ProviderSchema{
		Provider: &configschema.Block{
			Attributes: map[string]*configschema.Attribute{
				"bar": &configschema.Attribute{
					Type:     cty.String,
					Required: true,
				},
			},
			BlockTypes: map[string]*configschema.NestedBlock{},
		},
		ResourceTypes: map[string]*configschema.Block{
			"foo": testResource(&configschema.Block{
				Attributes: map[string]*configschema.Attribute{
					"bar": &configschema.Attribute{
						Type:     cty.String,
						Required: true,
					},
				},
				BlockTypes: map[string]*configschema.NestedBlock{},
			}),
		},
		DataSources: map[string]*configschema.Block{
			"baz": testResource(&configschema.Block{
				Attributes: map[string]*configschema.Attribute{
					"bur": &configschema.Attribute{
						Type:     cty.String,
						Required: true,
					},
				},
				BlockTypes: map[string]*configschema.NestedBlock{},
			}),
		},
	}
	got, err := p.GetSchema(&terraform.ProviderSchemaRequest{
		ResourceTypes: []string{"foo", "bar"},
		DataSources:   []string{"baz", "bar"},
	})
	if err != nil {
		t.Fatalf("unexpected error %s", err)
	}

	if !cmp.Equal(got, want, equateEmpty, typeComparer) {
		t.Error("wrong result:\n", cmp.Diff(got, want, equateEmpty, typeComparer))
	}
}

func TestProviderConfigure(t *testing.T) {
	cases := []struct {
		P      *Provider
		Config map[string]interface{}
		Err    bool
	}{
		{
			P:      &Provider{},
			Config: nil,
			Err:    false,
		},

		{
			P: &Provider{
				Schema: map[string]*Schema{
					"foo": &Schema{
						Type:     TypeInt,
						Optional: true,
					},
				},

				ConfigureFunc: func(d *ResourceData) (interface{}, error) {
					if d.Get("foo").(int) == 42 {
						return nil, nil
					}

					return nil, fmt.Errorf("nope")
				},
			},
			Config: map[string]interface{}{
				"foo": 42,
			},
			Err: false,
		},

		{
			P: &Provider{
				Schema: map[string]*Schema{
					"foo": &Schema{
						Type:     TypeInt,
						Optional: true,
					},
				},

				ConfigureFunc: func(d *ResourceData) (interface{}, error) {
					if d.Get("foo").(int) == 42 {
						return nil, nil
					}

					return nil, fmt.Errorf("nope")
				},
			},
			Config: map[string]interface{}{
				"foo": 52,
			},
			Err: true,
		},
	}

	for i, tc := range cases {
		c, err := config.NewRawConfig(tc.Config)
		if err != nil {
			t.Fatalf("err: %s", err)
		}

		err = tc.P.Configure(terraform.NewResourceConfig(c))
		if err != nil != tc.Err {
			t.Fatalf("%d: %s", i, err)
		}
	}
}

func TestProviderResources(t *testing.T) {
	cases := []struct {
		P      *Provider
		Result []terraform.ResourceType
	}{
		{
			P:      &Provider{},
			Result: []terraform.ResourceType{},
		},

		{
			P: &Provider{
				ResourcesMap: map[string]*Resource{
					"foo": nil,
					"bar": nil,
				},
			},
			Result: []terraform.ResourceType{
				terraform.ResourceType{Name: "bar", SchemaAvailable: true},
				terraform.ResourceType{Name: "foo", SchemaAvailable: true},
			},
		},

		{
			P: &Provider{
				ResourcesMap: map[string]*Resource{
					"foo": nil,
					"bar": &Resource{Importer: &ResourceImporter{}},
					"baz": nil,
				},
			},
			Result: []terraform.ResourceType{
				terraform.ResourceType{Name: "bar", Importable: true, SchemaAvailable: true},
				terraform.ResourceType{Name: "baz", SchemaAvailable: true},
				terraform.ResourceType{Name: "foo", SchemaAvailable: true},
			},
		},
	}

	for i, tc := range cases {
		actual := tc.P.Resources()
		if !reflect.DeepEqual(actual, tc.Result) {
			t.Fatalf("%d: %#v", i, actual)
		}
	}
}

func TestProviderDataSources(t *testing.T) {
	cases := []struct {
		P      *Provider
		Result []terraform.DataSource
	}{
		{
			P:      &Provider{},
			Result: []terraform.DataSource{},
		},

		{
			P: &Provider{
				DataSourcesMap: map[string]*Resource{
					"foo": nil,
					"bar": nil,
				},
			},
			Result: []terraform.DataSource{
				terraform.DataSource{Name: "bar", SchemaAvailable: true},
				terraform.DataSource{Name: "foo", SchemaAvailable: true},
			},
		},
	}

	for i, tc := range cases {
		actual := tc.P.DataSources()
		if !reflect.DeepEqual(actual, tc.Result) {
			t.Fatalf("%d: got %#v; want %#v", i, actual, tc.Result)
		}
	}
}

func TestProviderValidate(t *testing.T) {
	cases := []struct {
		P      *Provider
		Config map[string]interface{}
		Err    bool
	}{
		{
			P: &Provider{
				Schema: map[string]*Schema{
					"foo": &Schema{},
				},
			},
			Config: nil,
			Err:    true,
		},
	}

	for i, tc := range cases {
		c, err := config.NewRawConfig(tc.Config)
		if err != nil {
			t.Fatalf("err: %s", err)
		}

		_, es := tc.P.Validate(terraform.NewResourceConfig(c))
		if len(es) > 0 != tc.Err {
			t.Fatalf("%d: %#v", i, es)
		}
	}
}

func TestProviderValidateResource(t *testing.T) {
	cases := []struct {
		P      *Provider
		Type   string
		Config map[string]interface{}
		Err    bool
	}{
		{
			P:      &Provider{},
			Type:   "foo",
			Config: nil,
			Err:    true,
		},

		{
			P: &Provider{
				ResourcesMap: map[string]*Resource{
					"foo": &Resource{},
				},
			},
			Type:   "foo",
			Config: nil,
			Err:    false,
		},
	}

	for i, tc := range cases {
		c, err := config.NewRawConfig(tc.Config)
		if err != nil {
			t.Fatalf("err: %s", err)
		}

		_, es := tc.P.ValidateResource(tc.Type, terraform.NewResourceConfig(c))
		if len(es) > 0 != tc.Err {
			t.Fatalf("%d: %#v", i, es)
		}
	}
}

func TestProviderImportState_default(t *testing.T) {
	p := &Provider{
		ResourcesMap: map[string]*Resource{
			"foo": &Resource{
				Importer: &ResourceImporter{},
			},
		},
	}

	states, err := p.ImportState(&terraform.InstanceInfo{
		Type: "foo",
	}, "bar")
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	if len(states) != 1 {
		t.Fatalf("bad: %#v", states)
	}
	if states[0].ID != "bar" {
		t.Fatalf("bad: %#v", states)
	}
}

func TestProviderImportState_setsId(t *testing.T) {
	var val string
	stateFunc := func(d *ResourceData, meta interface{}) ([]*ResourceData, error) {
		val = d.Id()
		return []*ResourceData{d}, nil
	}

	p := &Provider{
		ResourcesMap: map[string]*Resource{
			"foo": &Resource{
				Importer: &ResourceImporter{
					State: stateFunc,
				},
			},
		},
	}

	_, err := p.ImportState(&terraform.InstanceInfo{
		Type: "foo",
	}, "bar")
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	if val != "bar" {
		t.Fatal("should set id")
	}
}

func TestProviderImportState_setsType(t *testing.T) {
	var tVal string
	stateFunc := func(d *ResourceData, meta interface{}) ([]*ResourceData, error) {
		d.SetId("foo")
		tVal = d.State().Ephemeral.Type
		return []*ResourceData{d}, nil
	}

	p := &Provider{
		ResourcesMap: map[string]*Resource{
			"foo": &Resource{
				Importer: &ResourceImporter{
					State: stateFunc,
				},
			},
		},
	}

	_, err := p.ImportState(&terraform.InstanceInfo{
		Type: "foo",
	}, "bar")
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	if tVal != "foo" {
		t.Fatal("should set type")
	}
}

func TestProviderMeta(t *testing.T) {
	p := new(Provider)
	if v := p.Meta(); v != nil {
		t.Fatalf("bad: %#v", v)
	}

	expected := 42
	p.SetMeta(42)
	if v := p.Meta(); !reflect.DeepEqual(v, expected) {
		t.Fatalf("bad: %#v", v)
	}
}

func TestProviderStop(t *testing.T) {
	var p Provider

	if p.Stopped() {
		t.Fatal("should not be stopped")
	}

	// Verify stopch blocks
	ch := p.StopContext().Done()
	select {
	case <-ch:
		t.Fatal("should not be stopped")
	case <-time.After(10 * time.Millisecond):
	}

	// Stop it
	if err := p.Stop(); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Verify
	if !p.Stopped() {
		t.Fatal("should be stopped")
	}

	select {
	case <-ch:
	case <-time.After(10 * time.Millisecond):
		t.Fatal("should be stopped")
	}
}

func TestProviderStop_stopFirst(t *testing.T) {
	var p Provider

	// Stop it
	if err := p.Stop(); err != nil {
		t.Fatalf("err: %s", err)
	}

	// Verify
	if !p.Stopped() {
		t.Fatal("should be stopped")
	}

	select {
	case <-p.StopContext().Done():
	case <-time.After(10 * time.Millisecond):
		t.Fatal("should be stopped")
	}
}

func TestProviderReset(t *testing.T) {
	var p Provider
	stopCtx := p.StopContext()
	p.MetaReset = func() error {
		stopCtx = p.StopContext()
		return nil
	}

	// cancel the current context
	p.Stop()

	if err := p.TestReset(); err != nil {
		t.Fatal(err)
	}

	// the first context should have been replaced
	if err := stopCtx.Err(); err != nil {
		t.Fatal(err)
	}

	// we should not get a canceled context here either
	if err := p.StopContext().Err(); err != nil {
		t.Fatal(err)
	}
}

func TestProvider_InternalValidate(t *testing.T) {
	cases := []struct {
		P           *Provider
		ExpectedErr error
	}{
		{
			P: &Provider{
				Schema: map[string]*Schema{
					"foo": {
						Type:     TypeBool,
						Optional: true,
					},
				},
			},
			ExpectedErr: nil,
		},
		{ // Reserved resource fields should be allowed in provider block
			P: &Provider{
				Schema: map[string]*Schema{
					"provisioner": {
						Type:     TypeString,
						Optional: true,
					},
					"count": {
						Type:     TypeInt,
						Optional: true,
					},
				},
			},
			ExpectedErr: nil,
		},
		{ // Reserved provider fields should not be allowed
			P: &Provider{
				Schema: map[string]*Schema{
					"alias": {
						Type:     TypeString,
						Optional: true,
					},
				},
			},
			ExpectedErr: fmt.Errorf("%s is a reserved field name for a provider", "alias"),
		},
	}

	for i, tc := range cases {
		err := tc.P.InternalValidate()
		if tc.ExpectedErr == nil {
			if err != nil {
				t.Fatalf("%d: Error returned (expected no error): %s", i, err)
			}
			continue
		}
		if tc.ExpectedErr != nil && err == nil {
			t.Fatalf("%d: Expected error (%s), but no error returned", i, tc.ExpectedErr)
		}
		if err.Error() != tc.ExpectedErr.Error() {
			t.Fatalf("%d: Errors don't match. Expected: %#v Given: %#v", i, tc.ExpectedErr, err)
		}
	}
}