// Copyright (c) The OpenTofu Authors
// SPDX-License-Identifier: MPL-2.0
// Copyright (c) 2023 HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0

package tofu

import (
	"fmt"
	"testing"

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

	"github.com/opentofu/opentofu/internal/addrs"
	"github.com/opentofu/opentofu/internal/configs"
	"github.com/opentofu/opentofu/internal/configs/configschema"
	"github.com/opentofu/opentofu/internal/states"
)

func TestNodeAbstractResourceInstanceProvider(t *testing.T) {
	tests := []struct {
		Addr                 addrs.AbsResourceInstance
		Config               *configs.Resource
		StoredProviderConfig addrs.AbsProviderConfig
		Want                 addrs.Provider
	}{
		{
			Addr: addrs.Resource{
				Mode: addrs.ManagedResourceMode,
				Type: "null_resource",
				Name: "baz",
			}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
			Want: addrs.Provider{
				Hostname:  addrs.DefaultProviderRegistryHost,
				Namespace: "hashicorp",
				Type:      "null",
			},
		},
		{
			Addr: addrs.Resource{
				Mode: addrs.DataResourceMode,
				Type: "terraform_remote_state",
				Name: "baz",
			}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
			Want: addrs.Provider{
				// As a special case, the type prefix "terraform_" maps to
				// the builtin provider, not the default one.
				Hostname:  addrs.BuiltInProviderHost,
				Namespace: addrs.BuiltInProviderNamespace,
				Type:      "terraform",
			},
		},
		{
			Addr: addrs.Resource{
				Mode: addrs.ManagedResourceMode,
				Type: "null_resource",
				Name: "baz",
			}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
			Config: &configs.Resource{
				// Just enough configs.Resource for the Provider method. Not
				// actually valid for general use.
				Provider: addrs.Provider{
					Hostname:  addrs.DefaultProviderRegistryHost,
					Namespace: "awesomecorp",
					Type:      "happycloud",
				},
			},
			// The config overrides the default behavior.
			Want: addrs.Provider{
				Hostname:  addrs.DefaultProviderRegistryHost,
				Namespace: "awesomecorp",
				Type:      "happycloud",
			},
		},
		{
			Addr: addrs.Resource{
				Mode: addrs.DataResourceMode,
				Type: "terraform_remote_state",
				Name: "baz",
			}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
			Config: &configs.Resource{
				// Just enough configs.Resource for the Provider method. Not
				// actually valid for general use.
				Provider: addrs.Provider{
					Hostname:  addrs.DefaultProviderRegistryHost,
					Namespace: "awesomecorp",
					Type:      "happycloud",
				},
			},
			// The config overrides the default behavior.
			Want: addrs.Provider{
				Hostname:  addrs.DefaultProviderRegistryHost,
				Namespace: "awesomecorp",
				Type:      "happycloud",
			},
		},
		{
			Addr: addrs.Resource{
				Mode: addrs.DataResourceMode,
				Type: "null_resource",
				Name: "baz",
			}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
			Config: nil,
			StoredProviderConfig: addrs.AbsProviderConfig{
				Module: addrs.RootModule,
				Provider: addrs.Provider{
					Hostname:  addrs.DefaultProviderRegistryHost,
					Namespace: "awesomecorp",
					Type:      "null",
				},
			},
			// The stored provider config overrides the default behavior.
			Want: addrs.Provider{
				Hostname:  addrs.DefaultProviderRegistryHost,
				Namespace: "awesomecorp",
				Type:      "null",
			},
		},
	}

	for _, test := range tests {
		var name string
		if test.Config != nil {
			name = fmt.Sprintf("%s with configured %s", test.Addr, test.Config.Provider)
		} else {
			name = fmt.Sprintf("%s with no configuration", test.Addr)
		}
		t.Run(name, func(t *testing.T) {
			node := &NodeAbstractResourceInstance{
				// Just enough NodeAbstractResourceInstance for the Provider
				// function. (This would not be valid for some other functions.)
				Addr: test.Addr,
				NodeAbstractResource: NodeAbstractResource{
					Addr:   test.Addr.ConfigResource(),
					Config: test.Config,
					storedProviderConfig: ResolvedProvider{
						ProviderConfig: test.StoredProviderConfig,
					},
				},
			}
			got := node.Provider()
			if got != test.Want {
				t.Errorf("wrong result\naddr:  %s\nconfig: %#v\ngot:   %s\nwant:  %s", test.Addr, test.Config, got, test.Want)
			}
		})
	}
}

func TestNodeAbstractResourceInstance_WriteResourceInstanceState(t *testing.T) {
	state := states.NewState()
	evalCtx := new(MockEvalContext)
	evalCtx.StateState = state.SyncWrapper()
	evalCtx.PathPath = addrs.RootModuleInstance

	mockProvider := mockProviderWithResourceTypeSchema("aws_instance", &configschema.Block{
		Attributes: map[string]*configschema.Attribute{
			"id": {
				Type:     cty.String,
				Optional: true,
			},
		},
	})

	obj := &states.ResourceInstanceObject{
		Value: cty.ObjectVal(map[string]cty.Value{
			"id": cty.StringVal("i-abc123"),
		}),
		Status: states.ObjectReady,
	}

	node := &NodeAbstractResourceInstance{
		Addr: mustResourceInstanceAddr("aws_instance.foo"),
		// instanceState:        obj,
		NodeAbstractResource: NodeAbstractResource{
			ResolvedProvider: ResolvedProvider{ProviderConfig: mustProviderConfig(`provider["registry.opentofu.org/hashicorp/aws"]`)},
		},
	}
	evalCtx.ProviderProvider = mockProvider
	evalCtx.ProviderSchemaSchema = mockProvider.GetProviderSchema(t.Context())

	err := node.writeResourceInstanceState(t.Context(), evalCtx, obj, workingState)
	if err != nil {
		t.Fatalf("unexpected error: %s", err.Error())
	}

	checkStateString(t, state, `
aws_instance.foo:
  ID = i-abc123
  provider = provider["registry.opentofu.org/hashicorp/aws"]
	`)
}

func TestFilterResourceProvisioners(t *testing.T) {
	tests := map[string]struct {
		when               configs.ProvisionerWhen
		cfg                *configs.Resource
		removedBlocksProvs []*configs.Provisioner
		wantProvs          []*configs.Provisioner
	}{
		"config and provisioners nil": {
			when:               configs.ProvisionerWhenDestroy,
			cfg:                nil,
			removedBlocksProvs: nil,
			wantProvs:          []*configs.Provisioner{},
		},
		"config nil and provisioners contains targeted provisioners": {
			when: configs.ProvisionerWhenDestroy,
			cfg:  nil,
			removedBlocksProvs: []*configs.Provisioner{
				{Type: "local-exec", When: configs.ProvisionerWhenDestroy},
				{Type: "local-exec2", When: configs.ProvisionerWhenCreate},
			},
			wantProvs: []*configs.Provisioner{
				{Type: "local-exec", When: configs.ProvisionerWhenDestroy},
			},
		},
		"config.managed nil and provisioners contains no targeted provisioners": {
			when: configs.ProvisionerWhenDestroy,
			cfg:  &configs.Resource{},
			removedBlocksProvs: []*configs.Provisioner{
				{Type: "local-exec", When: configs.ProvisionerWhenCreate},
				{Type: "local-exec2", When: configs.ProvisionerWhenCreate},
			},
			wantProvs: []*configs.Provisioner{},
		},
		// This is expecting an empty result because we want to use the resource defined provisioners when
		// config.managed exists
		"config.managed not nil and provisioners contains targeted provisioners": {
			when: configs.ProvisionerWhenCreate,
			cfg: &configs.Resource{
				Managed: &configs.ManagedResource{},
			},
			removedBlocksProvs: []*configs.Provisioner{
				{Type: "local-exec", When: configs.ProvisionerWhenCreate},
				{Type: "local-exec2", When: configs.ProvisionerWhenCreate},
			},
			wantProvs: nil,
		},
		"config.managed is having provisioners therefore removed blocks provisioners are ignored": {
			when: configs.ProvisionerWhenCreate,
			cfg: &configs.Resource{
				Managed: &configs.ManagedResource{
					Provisioners: []*configs.Provisioner{
						{Type: "local-exec3", When: configs.ProvisionerWhenCreate},
						{Type: "local-exec4", When: configs.ProvisionerWhenCreate},
					},
				},
			},
			removedBlocksProvs: []*configs.Provisioner{
				{Type: "local-exec", When: configs.ProvisionerWhenCreate},
				{Type: "local-exec2", When: configs.ProvisionerWhenCreate},
			},
			wantProvs: []*configs.Provisioner{
				{Type: "local-exec3", When: configs.ProvisionerWhenCreate},
				{Type: "local-exec4", When: configs.ProvisionerWhenCreate},
			},
		},
	}
	for name, test := range tests {
		t.Run(fmt.Sprintf("%s-%s", test.when, name), func(t *testing.T) {
			res := filterResourceProvisioners(test.cfg, test.removedBlocksProvs, test.when)
			if diff := cmp.Diff(test.wantProvs, res); diff != "" {
				t.Errorf("expected provisioners different than what we got:\n%s", diff)
			}
		})
	}
}
