package terraform

import (
	"fmt"
	"strings"
	"testing"

	"github.com/hashicorp/hcl/v2"
	"github.com/hashicorp/terraform/addrs"
	"github.com/hashicorp/terraform/configs"
	"github.com/hashicorp/terraform/configs/configschema"
	"github.com/hashicorp/terraform/internal/providers"
	"github.com/hashicorp/terraform/internal/tfdiags"
	"github.com/zclconf/go-cty/cty"
)

func TestNodeApplyableProviderExecute(t *testing.T) {
	config := &configs.Provider{
		Name: "foo",
		Config: configs.SynthBody("", map[string]cty.Value{
			"test_string": cty.StringVal("hello"),
		}),
	}
	provider := mockProviderWithConfigSchema(simpleTestSchema())
	providerAddr := addrs.AbsProviderConfig{
		Module:   addrs.RootModule,
		Provider: addrs.NewDefaultProvider("foo"),
	}

	n := &NodeApplyableProvider{&NodeAbstractProvider{
		Addr:   providerAddr,
		Config: config,
	}}

	ctx := &MockEvalContext{ProviderProvider: provider}
	ctx.installSimpleEval()
	if err := n.Execute(ctx, walkApply); err != nil {
		t.Fatalf("err: %s", err)
	}

	if !ctx.ConfigureProviderCalled {
		t.Fatal("should be called")
	}

	gotObj := ctx.ConfigureProviderConfig
	if !gotObj.Type().HasAttribute("test_string") {
		t.Fatal("configuration object does not have \"test_string\" attribute")
	}
	if got, want := gotObj.GetAttr("test_string"), cty.StringVal("hello"); !got.RawEquals(want) {
		t.Errorf("wrong configuration value\ngot:  %#v\nwant: %#v", got, want)
	}
}

func TestNodeApplyableProviderExecute_unknownImport(t *testing.T) {
	config := &configs.Provider{
		Name: "foo",
		Config: configs.SynthBody("", map[string]cty.Value{
			"test_string": cty.UnknownVal(cty.String),
		}),
	}
	provider := mockProviderWithConfigSchema(simpleTestSchema())
	providerAddr := addrs.AbsProviderConfig{
		Module:   addrs.RootModule,
		Provider: addrs.NewDefaultProvider("foo"),
	}
	n := &NodeApplyableProvider{&NodeAbstractProvider{
		Addr:   providerAddr,
		Config: config,
	}}

	ctx := &MockEvalContext{ProviderProvider: provider}
	ctx.installSimpleEval()

	diags := n.Execute(ctx, walkImport)
	if !diags.HasErrors() {
		t.Fatal("expected error, got success")
	}

	detail := `Invalid provider configuration: The configuration for provider["registry.terraform.io/hashicorp/foo"] depends on values that cannot be determined until apply.`
	if got, want := diags.Err().Error(), detail; got != want {
		t.Errorf("wrong diagnostic detail\n got: %q\nwant: %q", got, want)
	}

	if ctx.ConfigureProviderCalled {
		t.Fatal("should not be called")
	}
}

func TestNodeApplyableProviderExecute_unknownApply(t *testing.T) {
	config := &configs.Provider{
		Name: "foo",
		Config: configs.SynthBody("", map[string]cty.Value{
			"test_string": cty.UnknownVal(cty.String),
		}),
	}
	provider := mockProviderWithConfigSchema(simpleTestSchema())
	providerAddr := addrs.AbsProviderConfig{
		Module:   addrs.RootModule,
		Provider: addrs.NewDefaultProvider("foo"),
	}
	n := &NodeApplyableProvider{&NodeAbstractProvider{
		Addr:   providerAddr,
		Config: config,
	}}
	ctx := &MockEvalContext{ProviderProvider: provider}
	ctx.installSimpleEval()

	if err := n.Execute(ctx, walkApply); err != nil {
		t.Fatalf("err: %s", err)
	}

	if !ctx.ConfigureProviderCalled {
		t.Fatal("should be called")
	}

	gotObj := ctx.ConfigureProviderConfig
	if !gotObj.Type().HasAttribute("test_string") {
		t.Fatal("configuration object does not have \"test_string\" attribute")
	}
	if got, want := gotObj.GetAttr("test_string"), cty.UnknownVal(cty.String); !got.RawEquals(want) {
		t.Errorf("wrong configuration value\ngot:  %#v\nwant: %#v", got, want)
	}
}

func TestNodeApplyableProviderExecute_sensitive(t *testing.T) {
	config := &configs.Provider{
		Name: "foo",
		Config: configs.SynthBody("", map[string]cty.Value{
			"test_string": cty.StringVal("hello").Mark("sensitive"),
		}),
	}
	provider := mockProviderWithConfigSchema(simpleTestSchema())
	providerAddr := addrs.AbsProviderConfig{
		Module:   addrs.RootModule,
		Provider: addrs.NewDefaultProvider("foo"),
	}

	n := &NodeApplyableProvider{&NodeAbstractProvider{
		Addr:   providerAddr,
		Config: config,
	}}

	ctx := &MockEvalContext{ProviderProvider: provider}
	ctx.installSimpleEval()
	if err := n.Execute(ctx, walkApply); err != nil {
		t.Fatalf("err: %s", err)
	}

	if !ctx.ConfigureProviderCalled {
		t.Fatal("should be called")
	}

	gotObj := ctx.ConfigureProviderConfig
	if !gotObj.Type().HasAttribute("test_string") {
		t.Fatal("configuration object does not have \"test_string\" attribute")
	}
	if got, want := gotObj.GetAttr("test_string"), cty.StringVal("hello"); !got.RawEquals(want) {
		t.Errorf("wrong configuration value\ngot:  %#v\nwant: %#v", got, want)
	}
}

func TestNodeApplyableProviderExecute_sensitiveValidate(t *testing.T) {
	config := &configs.Provider{
		Name: "foo",
		Config: configs.SynthBody("", map[string]cty.Value{
			"test_string": cty.StringVal("hello").Mark("sensitive"),
		}),
	}
	provider := mockProviderWithConfigSchema(simpleTestSchema())
	providerAddr := addrs.AbsProviderConfig{
		Module:   addrs.RootModule,
		Provider: addrs.NewDefaultProvider("foo"),
	}

	n := &NodeApplyableProvider{&NodeAbstractProvider{
		Addr:   providerAddr,
		Config: config,
	}}

	ctx := &MockEvalContext{ProviderProvider: provider}
	ctx.installSimpleEval()
	if err := n.Execute(ctx, walkValidate); err != nil {
		t.Fatalf("err: %s", err)
	}

	if !provider.ValidateProviderConfigCalled {
		t.Fatal("should be called")
	}

	gotObj := provider.ValidateProviderConfigRequest.Config
	if !gotObj.Type().HasAttribute("test_string") {
		t.Fatal("configuration object does not have \"test_string\" attribute")
	}
	if got, want := gotObj.GetAttr("test_string"), cty.StringVal("hello"); !got.RawEquals(want) {
		t.Errorf("wrong configuration value\ngot:  %#v\nwant: %#v", got, want)
	}
}

func TestNodeApplyableProviderExecute_emptyValidate(t *testing.T) {
	config := &configs.Provider{
		Name:   "foo",
		Config: configs.SynthBody("", map[string]cty.Value{}),
	}
	provider := mockProviderWithConfigSchema(&configschema.Block{
		Attributes: map[string]*configschema.Attribute{
			"test_string": {
				Type:     cty.String,
				Required: true,
			},
		},
	})
	providerAddr := addrs.AbsProviderConfig{
		Module:   addrs.RootModule,
		Provider: addrs.NewDefaultProvider("foo"),
	}

	n := &NodeApplyableProvider{&NodeAbstractProvider{
		Addr:   providerAddr,
		Config: config,
	}}

	ctx := &MockEvalContext{ProviderProvider: provider}
	ctx.installSimpleEval()
	if err := n.Execute(ctx, walkValidate); err != nil {
		t.Fatalf("err: %s", err)
	}

	if ctx.ConfigureProviderCalled {
		t.Fatal("should not be called")
	}
}

func TestNodeApplyableProvider_Validate(t *testing.T) {
	provider := mockProviderWithConfigSchema(&configschema.Block{
		Attributes: map[string]*configschema.Attribute{
			"region": {
				Type:     cty.String,
				Required: true,
			},
		},
	})
	ctx := &MockEvalContext{ProviderProvider: provider}
	ctx.installSimpleEval()

	t.Run("valid", func(t *testing.T) {
		config := &configs.Provider{
			Name: "test",
			Config: configs.SynthBody("", map[string]cty.Value{
				"region": cty.StringVal("mars"),
			}),
		}

		node := NodeApplyableProvider{
			NodeAbstractProvider: &NodeAbstractProvider{
				Addr:   mustProviderConfig(`provider["registry.terraform.io/hashicorp/aws"]`),
				Config: config,
			},
		}

		diags := node.ValidateProvider(ctx, provider)
		if diags.HasErrors() {
			t.Errorf("unexpected error with valid config: %s", diags.Err())
		}
	})

	t.Run("invalid", func(t *testing.T) {
		config := &configs.Provider{
			Name: "test",
			Config: configs.SynthBody("", map[string]cty.Value{
				"region": cty.MapValEmpty(cty.String),
			}),
		}

		node := NodeApplyableProvider{
			NodeAbstractProvider: &NodeAbstractProvider{
				Addr:   mustProviderConfig(`provider["registry.terraform.io/hashicorp/aws"]`),
				Config: config,
			},
		}

		diags := node.ValidateProvider(ctx, provider)
		if !diags.HasErrors() {
			t.Error("missing expected error with invalid config")
		}
	})

	t.Run("empty config", func(t *testing.T) {
		node := NodeApplyableProvider{
			NodeAbstractProvider: &NodeAbstractProvider{
				Addr: mustProviderConfig(`provider["registry.terraform.io/hashicorp/aws"]`),
			},
		}

		diags := node.ValidateProvider(ctx, provider)
		if diags.HasErrors() {
			t.Errorf("unexpected error with empty config: %s", diags.Err())
		}
	})
}

//This test specifically tests responses from the
//providers.ValidateProviderConfigFn. See
//TestNodeApplyableProvider_ConfigProvider_config_fn_err for
//providers.ConfigureProviderRequest responses.
func TestNodeApplyableProvider_ConfigProvider(t *testing.T) {
	provider := mockProviderWithConfigSchema(&configschema.Block{
		Attributes: map[string]*configschema.Attribute{
			"region": {
				Type:     cty.String,
				Optional: true,
			},
		},
	})
	// For this test, we're returning an error for an optional argument. This
	// can happen for example if an argument is only conditionally required.
	provider.ValidateProviderConfigFn = func(req providers.ValidateProviderConfigRequest) (resp providers.ValidateProviderConfigResponse) {
		region := req.Config.GetAttr("region")
		if region.IsNull() {
			resp.Diagnostics = resp.Diagnostics.Append(
				tfdiags.WholeContainingBody(tfdiags.Error, "value is not found", "you did not supply a required value"))
		}
		return
	}
	ctx := &MockEvalContext{ProviderProvider: provider}
	ctx.installSimpleEval()

	t.Run("valid", func(t *testing.T) {
		config := &configs.Provider{
			Name: "test",
			Config: configs.SynthBody("", map[string]cty.Value{
				"region": cty.StringVal("mars"),
			}),
		}

		node := NodeApplyableProvider{
			NodeAbstractProvider: &NodeAbstractProvider{
				Addr:   mustProviderConfig(`provider["registry.terraform.io/hashicorp/aws"]`),
				Config: config,
			},
		}

		diags := node.ConfigureProvider(ctx, provider, false)
		if diags.HasErrors() {
			t.Errorf("unexpected error with valid config: %s", diags.Err())
		}
	})

	t.Run("missing required config (no config at all)", func(t *testing.T) {
		node := NodeApplyableProvider{
			NodeAbstractProvider: &NodeAbstractProvider{
				Addr: mustProviderConfig(`provider["registry.terraform.io/hashicorp/aws"]`),
			},
		}

		diags := node.ConfigureProvider(ctx, provider, false)
		if !diags.HasErrors() {
			t.Fatal("missing expected error with nil config")
		}
		if !strings.Contains(diags.Err().Error(), "requires explicit configuration") {
			t.Errorf("diagnostic is missing \"requires explicit configuration\" message: %s", diags.Err())
		}
	})

	t.Run("missing required config", func(t *testing.T) {
		config := &configs.Provider{
			Name:   "test",
			Config: hcl.EmptyBody(),
		}
		node := NodeApplyableProvider{
			NodeAbstractProvider: &NodeAbstractProvider{
				Addr:   mustProviderConfig(`provider["registry.terraform.io/hashicorp/aws"]`),
				Config: config,
			},
		}

		diags := node.ConfigureProvider(ctx, provider, false)
		if !diags.HasErrors() {
			t.Fatal("missing expected error with invalid config")
		}
		if !strings.Contains(diags.Err().Error(), "value is not found") {
			t.Errorf("wrong diagnostic: %s", diags.Err())
		}
	})

}

//This test is similar to TestNodeApplyableProvider_ConfigProvider, but tests responses from the providers.ConfigureProviderRequest
func TestNodeApplyableProvider_ConfigProvider_config_fn_err(t *testing.T) {
	provider := mockProviderWithConfigSchema(&configschema.Block{
		Attributes: map[string]*configschema.Attribute{
			"region": {
				Type:     cty.String,
				Optional: true,
			},
		},
	})
	ctx := &MockEvalContext{ProviderProvider: provider}
	ctx.installSimpleEval()
	// For this test, provider.PrepareConfigFn will succeed every time but the
	// ctx.ConfigureProviderFn will return an error if a value is not found.
	//
	// This is an unlikely but real situation that occurs:
	// https://github.com/hashicorp/terraform/issues/23087
	ctx.ConfigureProviderFn = func(addr addrs.AbsProviderConfig, cfg cty.Value) (diags tfdiags.Diagnostics) {
		if cfg.IsNull() {
			diags = diags.Append(fmt.Errorf("no config provided"))
		} else {
			region := cfg.GetAttr("region")
			if region.IsNull() {
				diags = diags.Append(fmt.Errorf("value is not found"))
			}
		}
		return
	}

	t.Run("valid", func(t *testing.T) {
		config := &configs.Provider{
			Name: "test",
			Config: configs.SynthBody("", map[string]cty.Value{
				"region": cty.StringVal("mars"),
			}),
		}

		node := NodeApplyableProvider{
			NodeAbstractProvider: &NodeAbstractProvider{
				Addr:   mustProviderConfig(`provider["registry.terraform.io/hashicorp/aws"]`),
				Config: config,
			},
		}

		diags := node.ConfigureProvider(ctx, provider, false)
		if diags.HasErrors() {
			t.Errorf("unexpected error with valid config: %s", diags.Err())
		}
	})

	t.Run("missing required config (no config at all)", func(t *testing.T) {
		node := NodeApplyableProvider{
			NodeAbstractProvider: &NodeAbstractProvider{
				Addr: mustProviderConfig(`provider["registry.terraform.io/hashicorp/aws"]`),
			},
		}

		diags := node.ConfigureProvider(ctx, provider, false)
		if !diags.HasErrors() {
			t.Fatal("missing expected error with nil config")
		}
		if !strings.Contains(diags.Err().Error(), "requires explicit configuration") {
			t.Errorf("diagnostic is missing \"requires explicit configuration\" message: %s", diags.Err())
		}
	})

	t.Run("missing required config", func(t *testing.T) {
		config := &configs.Provider{
			Name:   "test",
			Config: hcl.EmptyBody(),
		}
		node := NodeApplyableProvider{
			NodeAbstractProvider: &NodeAbstractProvider{
				Addr:   mustProviderConfig(`provider["registry.terraform.io/hashicorp/aws"]`),
				Config: config,
			},
		}

		diags := node.ConfigureProvider(ctx, provider, false)
		if !diags.HasErrors() {
			t.Fatal("missing expected error with invalid config")
		}
		if diags.Err().Error() != "value is not found" {
			t.Errorf("wrong diagnostic: %s", diags.Err())
		}
	})
}

func TestGetSchemaError(t *testing.T) {
	provider := &MockProvider{
		GetProviderSchemaResponse: &providers.GetProviderSchemaResponse{
			Diagnostics: tfdiags.Diagnostics.Append(nil, tfdiags.WholeContainingBody(tfdiags.Error, "oops", "error")),
		},
	}

	providerAddr := mustProviderConfig(`provider["terraform.io/some/provider"]`)
	ctx := &MockEvalContext{ProviderProvider: provider}
	ctx.installSimpleEval()
	node := NodeApplyableProvider{
		NodeAbstractProvider: &NodeAbstractProvider{
			Addr: providerAddr,
		},
	}

	diags := node.ConfigureProvider(ctx, provider, false)
	for _, d := range diags {
		desc := d.Description()
		if desc.Address != providerAddr.String() {
			t.Fatalf("missing provider address from diagnostics: %#v", desc)
		}
	}

}