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

package hcl2shim

import (
	"fmt"
	"reflect"
	"testing"

	"github.com/opentofu/opentofu/internal/configs/configschema"
	"github.com/zclconf/go-cty/cty"
)

func TestConfigValueFromHCL2Block(t *testing.T) {
	tests := []struct {
		Input  cty.Value
		Schema *configschema.Block
		Want   map[string]interface{}
	}{
		{
			cty.ObjectVal(map[string]cty.Value{
				"name": cty.StringVal("Ermintrude"),
				"age":  cty.NumberIntVal(19),
				"address": cty.ObjectVal(map[string]cty.Value{
					"street": cty.ListVal([]cty.Value{cty.StringVal("421 Shoreham Loop")}),
					"city":   cty.StringVal("Fridgewater"),
					"state":  cty.StringVal("MA"),
					"zip":    cty.StringVal("91037"),
				}),
			}),
			&configschema.Block{
				Attributes: map[string]*configschema.Attribute{
					"name": {Type: cty.String, Optional: true},
					"age":  {Type: cty.Number, Optional: true},
				},
				BlockTypes: map[string]*configschema.NestedBlock{
					"address": {
						Nesting: configschema.NestingSingle,
						Block: configschema.Block{
							Attributes: map[string]*configschema.Attribute{
								"street": {Type: cty.List(cty.String), Optional: true},
								"city":   {Type: cty.String, Optional: true},
								"state":  {Type: cty.String, Optional: true},
								"zip":    {Type: cty.String, Optional: true},
							},
						},
					},
				},
			},
			map[string]interface{}{
				"name": "Ermintrude",
				"age":  int(19),
				"address": map[string]interface{}{
					"street": []interface{}{"421 Shoreham Loop"},
					"city":   "Fridgewater",
					"state":  "MA",
					"zip":    "91037",
				},
			},
		},
		{
			cty.ObjectVal(map[string]cty.Value{
				"name": cty.StringVal("Ermintrude"),
				"age":  cty.NumberIntVal(19),
				"address": cty.NullVal(cty.Object(map[string]cty.Type{
					"street": cty.List(cty.String),
					"city":   cty.String,
					"state":  cty.String,
					"zip":    cty.String,
				})),
			}),
			&configschema.Block{
				Attributes: map[string]*configschema.Attribute{
					"name": {Type: cty.String, Optional: true},
					"age":  {Type: cty.Number, Optional: true},
				},
				BlockTypes: map[string]*configschema.NestedBlock{
					"address": {
						Nesting: configschema.NestingSingle,
						Block: configschema.Block{
							Attributes: map[string]*configschema.Attribute{
								"street": {Type: cty.List(cty.String), Optional: true},
								"city":   {Type: cty.String, Optional: true},
								"state":  {Type: cty.String, Optional: true},
								"zip":    {Type: cty.String, Optional: true},
							},
						},
					},
				},
			},
			map[string]interface{}{
				"name": "Ermintrude",
				"age":  int(19),
			},
		},
		{
			cty.ObjectVal(map[string]cty.Value{
				"name": cty.StringVal("Ermintrude"),
				"age":  cty.NumberIntVal(19),
				"address": cty.ObjectVal(map[string]cty.Value{
					"street": cty.ListVal([]cty.Value{cty.StringVal("421 Shoreham Loop")}),
					"city":   cty.StringVal("Fridgewater"),
					"state":  cty.StringVal("MA"),
					"zip":    cty.NullVal(cty.String), // should be omitted altogether in result
				}),
			}),
			&configschema.Block{
				Attributes: map[string]*configschema.Attribute{
					"name": {Type: cty.String, Optional: true},
					"age":  {Type: cty.Number, Optional: true},
				},
				BlockTypes: map[string]*configschema.NestedBlock{
					"address": {
						Nesting: configschema.NestingSingle,
						Block: configschema.Block{
							Attributes: map[string]*configschema.Attribute{
								"street": {Type: cty.List(cty.String), Optional: true},
								"city":   {Type: cty.String, Optional: true},
								"state":  {Type: cty.String, Optional: true},
								"zip":    {Type: cty.String, Optional: true},
							},
						},
					},
				},
			},
			map[string]interface{}{
				"name": "Ermintrude",
				"age":  int(19),
				"address": map[string]interface{}{
					"street": []interface{}{"421 Shoreham Loop"},
					"city":   "Fridgewater",
					"state":  "MA",
				},
			},
		},
		{
			cty.ObjectVal(map[string]cty.Value{
				"address": cty.ListVal([]cty.Value{cty.EmptyObjectVal}),
			}),
			&configschema.Block{
				BlockTypes: map[string]*configschema.NestedBlock{
					"address": {
						Nesting: configschema.NestingList,
						Block:   configschema.Block{},
					},
				},
			},
			map[string]interface{}{
				"address": []interface{}{
					map[string]interface{}{},
				},
			},
		},
		{
			cty.ObjectVal(map[string]cty.Value{
				"address": cty.ListValEmpty(cty.EmptyObject), // should be omitted altogether in result
			}),
			&configschema.Block{
				BlockTypes: map[string]*configschema.NestedBlock{
					"address": {
						Nesting: configschema.NestingList,
						Block:   configschema.Block{},
					},
				},
			},
			map[string]interface{}{},
		},
		{
			cty.ObjectVal(map[string]cty.Value{
				"address": cty.SetVal([]cty.Value{cty.EmptyObjectVal}),
			}),
			&configschema.Block{
				BlockTypes: map[string]*configschema.NestedBlock{
					"address": {
						Nesting: configschema.NestingSet,
						Block:   configschema.Block{},
					},
				},
			},
			map[string]interface{}{
				"address": []interface{}{
					map[string]interface{}{},
				},
			},
		},
		{
			cty.ObjectVal(map[string]cty.Value{
				"address": cty.SetValEmpty(cty.EmptyObject),
			}),
			&configschema.Block{
				BlockTypes: map[string]*configschema.NestedBlock{
					"address": {
						Nesting: configschema.NestingSet,
						Block:   configschema.Block{},
					},
				},
			},
			map[string]interface{}{},
		},
		{
			cty.ObjectVal(map[string]cty.Value{
				"address": cty.MapVal(map[string]cty.Value{"foo": cty.EmptyObjectVal}),
			}),
			&configschema.Block{
				BlockTypes: map[string]*configschema.NestedBlock{
					"address": {
						Nesting: configschema.NestingMap,
						Block:   configschema.Block{},
					},
				},
			},
			map[string]interface{}{
				"address": map[string]interface{}{
					"foo": map[string]interface{}{},
				},
			},
		},
		{
			cty.ObjectVal(map[string]cty.Value{
				"address": cty.MapValEmpty(cty.EmptyObject),
			}),
			&configschema.Block{
				BlockTypes: map[string]*configschema.NestedBlock{
					"address": {
						Nesting: configschema.NestingMap,
						Block:   configschema.Block{},
					},
				},
			},
			map[string]interface{}{},
		},
		{
			cty.NullVal(cty.EmptyObject),
			&configschema.Block{},
			nil,
		},
	}

	for _, test := range tests {
		t.Run(fmt.Sprintf("%#v", test.Input), func(t *testing.T) {
			got := ConfigValueFromHCL2Block(test.Input, test.Schema)
			if !reflect.DeepEqual(got, test.Want) {
				t.Errorf("wrong result\ninput: %#v\ngot:   %#v\nwant:  %#v", test.Input, got, test.Want)
			}
		})
	}
}

func TestConfigValueFromHCL2(t *testing.T) {
	tests := []struct {
		Input cty.Value
		Want  interface{}
	}{
		{
			cty.True,
			true,
		},
		{
			cty.False,
			false,
		},
		{
			cty.NumberIntVal(12),
			int(12),
		},
		{
			cty.NumberFloatVal(12.5),
			float64(12.5),
		},
		{
			cty.StringVal("hello world"),
			"hello world",
		},
		{
			cty.ObjectVal(map[string]cty.Value{
				"name": cty.StringVal("Ermintrude"),
				"age":  cty.NumberIntVal(19),
				"address": cty.ObjectVal(map[string]cty.Value{
					"street": cty.ListVal([]cty.Value{cty.StringVal("421 Shoreham Loop")}),
					"city":   cty.StringVal("Fridgewater"),
					"state":  cty.StringVal("MA"),
					"zip":    cty.StringVal("91037"),
				}),
			}),
			map[string]interface{}{
				"name": "Ermintrude",
				"age":  int(19),
				"address": map[string]interface{}{
					"street": []interface{}{"421 Shoreham Loop"},
					"city":   "Fridgewater",
					"state":  "MA",
					"zip":    "91037",
				},
			},
		},
		{
			cty.MapVal(map[string]cty.Value{
				"foo": cty.StringVal("bar"),
				"bar": cty.StringVal("baz"),
			}),
			map[string]interface{}{
				"foo": "bar",
				"bar": "baz",
			},
		},
		{
			cty.TupleVal([]cty.Value{
				cty.StringVal("foo"),
				cty.True,
			}),
			[]interface{}{
				"foo",
				true,
			},
		},
		{
			cty.NullVal(cty.String),
			nil,
		},
		{
			cty.UnknownVal(cty.String),
			UnknownVariableValue,
		},
	}

	for _, test := range tests {
		t.Run(fmt.Sprintf("%#v", test.Input), func(t *testing.T) {
			got := ConfigValueFromHCL2(test.Input)
			if !reflect.DeepEqual(got, test.Want) {
				t.Errorf("wrong result\ninput: %#v\ngot:   %#v\nwant:  %#v", test.Input, got, test.Want)
			}
		})
	}
}

func TestHCL2ValueFromConfigValue(t *testing.T) {
	tests := []struct {
		Input interface{}
		Want  cty.Value
	}{
		{
			nil,
			cty.NullVal(cty.DynamicPseudoType),
		},
		{
			UnknownVariableValue,
			cty.DynamicVal,
		},
		{
			true,
			cty.True,
		},
		{
			false,
			cty.False,
		},
		{
			int(12),
			cty.NumberIntVal(12),
		},
		{
			int(0),
			cty.Zero,
		},
		{
			float64(12.5),
			cty.NumberFloatVal(12.5),
		},
		{
			"hello world",
			cty.StringVal("hello world"),
		},
		{
			"O\u0308",               // decomposed letter + diacritic
			cty.StringVal("\u00D6"), // NFC-normalized on entry into cty
		},
		{
			[]interface{}{},
			cty.EmptyTupleVal,
		},
		{
			[]interface{}(nil),
			cty.EmptyTupleVal,
		},
		{
			[]interface{}{"hello", "world"},
			cty.TupleVal([]cty.Value{cty.StringVal("hello"), cty.StringVal("world")}),
		},
		{
			map[string]interface{}{},
			cty.EmptyObjectVal,
		},
		{
			map[string]interface{}(nil),
			cty.EmptyObjectVal,
		},
		{
			map[string]interface{}{
				"foo": "bar",
				"bar": "baz",
			},
			cty.ObjectVal(map[string]cty.Value{
				"foo": cty.StringVal("bar"),
				"bar": cty.StringVal("baz"),
			}),
		},
	}

	for _, test := range tests {
		t.Run(fmt.Sprintf("%#v", test.Input), func(t *testing.T) {
			got := HCL2ValueFromConfigValue(test.Input)
			if !got.RawEquals(test.Want) {
				t.Errorf("wrong result\ninput: %#v\ngot:   %#v\nwant:  %#v", test.Input, got, test.Want)
			}
		})
	}
}