package testsuite

import (
	"context"
	"testing"

	"forge.cadoles.com/arcad/edge/pkg/storage"
	"forge.cadoles.com/arcad/edge/pkg/storage/filter"
	"github.com/pkg/errors"
)

type documentStoreOpsTestCase struct {
	Name string
	Run  func(ctx context.Context, store storage.DocumentStore) error
}

var documentStoreOpsTestCases = []documentStoreOpsTestCase{
	{
		Name: "Basic query",
		Run: func(ctx context.Context, store storage.DocumentStore) error {
			collection := "simple_select"

			docs := []storage.Document{
				{
					"attr1": "Foo",
				},
				{
					"attr1": "Bar",
				},
			}

			for _, d := range docs {
				if _, err := store.Upsert(ctx, collection, d); err != nil {
					return errors.WithStack(err)
				}
			}

			filter := filter.New(
				filter.NewEqOperator(map[string]interface{}{
					"attr1": "Foo",
				}),
			)

			results, err := store.Query(ctx, collection, filter)
			if err != nil {
				return errors.WithStack(err)
			}

			if e, g := 1, len(results); e != g {
				return errors.Errorf("len(results): expected '%v', got '%v'", e, g)
			}

			if e, g := "Foo", results[0]["attr1"]; e != g {
				return errors.Errorf("results[0][\"Attr1\"]: expected '%v', got '%v'", e, g)
			}

			return nil
		},
	},
	{
		Name: "Query on _id",
		Run: func(ctx context.Context, store storage.DocumentStore) error {
			collection := "query_on_id"

			doc := storage.Document{
				"attr1": "Foo",
			}

			upsertedDoc, err := store.Upsert(ctx, collection, doc)
			if err != nil {
				return errors.WithStack(err)
			}

			docID, ok := upsertedDoc.ID()
			if !ok {
				return errors.Errorf("")
			}

			filter := filter.New(
				filter.NewEqOperator(map[string]interface{}{
					"_id": docID,
				}),
			)

			results, err := store.Query(ctx, collection, filter)
			if err != nil {
				return errors.WithStack(err)
			}

			if e, g := 1, len(results); e != g {
				return errors.Errorf("len(results): expected '%v', got '%v'", e, g)
			}

			return nil
		},
	},
	{
		Name: "Query with 'IN' operator",
		Run: func(ctx context.Context, store storage.DocumentStore) error {
			docs := []storage.Document{
				{
					"counter": 1,
					"tags":    []string{"foo", "bar"},
				},
				{
					"counter": 1,
					"tags":    []string{"nope"},
				},
			}

			collection := "in_operator"

			for _, doc := range docs {
				if _, err := store.Upsert(ctx, collection, doc); err != nil {
					return errors.WithStack(err)
				}
			}

			filter := filter.New(
				filter.NewAndOperator(
					filter.NewEqOperator(map[string]any{
						"counter": 1,
					}),
					filter.NewInOperator(map[string]any{
						"tags": "foo",
					}),
				),
			)

			results, err := store.Query(ctx, collection, filter)
			if err != nil {
				return errors.WithStack(err)
			}

			if e, g := 1, len(results); e != g {
				return errors.Errorf("len(results): expected '%v', got '%v'", e, g)
			}

			return nil
		},
	},
	{
		Name: "Double upsert",
		Run: func(ctx context.Context, store storage.DocumentStore) error {
			collection := "double_upsert"

			oriDoc := storage.Document{
				"attr1": "Foo",
			}

			// Upsert document for the first time
			upsertedDoc, err := store.Upsert(ctx, collection, oriDoc)
			if err != nil {
				return errors.WithStack(err)
			}

			id, exists := upsertedDoc.ID()
			if !exists {
				return errors.New("id, exists := upsertedDoc.ID(): 'exists' should be true")
			}

			if id == storage.DocumentID("") {
				return errors.New("id, exists := upsertedDoc.ID(): 'id' should not be an empty string")
			}

			createdAt, exists := upsertedDoc.CreatedAt()
			if !exists {
				return errors.New("createdAt, exists := upsertedDoc.CreatedAt(): 'exists' should be true")
			}

			if createdAt.IsZero() {
				return errors.New("createdAt, exists := upsertedDoc.CreatedAt(): 'createdAt' should not be zero time")
			}

			updatedAt, exists := upsertedDoc.UpdatedAt()
			if !exists {
				return errors.New("updatedAt, exists := upsertedDoc.UpdatedAt(): 'exists' should be true")
			}

			if updatedAt.IsZero() {
				return errors.New("updatedAt, exists := upsertedDoc.UpdatedAt(): 'updatedAt' should not be zero time")
			}

			if e, g := oriDoc["attr1"], upsertedDoc["attr1"]; e != g {
				return errors.Errorf("upsertedDoc[\"attr1\"]: expected '%v', got '%v'", e, g)
			}

			// Check that document does not have unexpected properties
			if e, g := 4, len(upsertedDoc); e != g {
				return errors.Errorf("len(upsertedDoc): expected '%v', got '%v'", e, g)
			}

			// Upsert document for the second time
			upsertedDoc2, err := store.Upsert(ctx, collection, upsertedDoc)
			if err != nil {
				return errors.WithStack(err)
			}

			prevID, _ := upsertedDoc.ID()
			newID, _ := upsertedDoc2.ID()

			if e, g := prevID, newID; e != g {
				return errors.Errorf("newID: expected '%v', got '%v'", e, g)
			}

			createdAt1, _ := upsertedDoc.CreatedAt()
			createdAt2, _ := upsertedDoc2.CreatedAt()

			if e, g := createdAt1, createdAt2; e != g {
				return errors.Errorf("upsertedDoc2.CreatedAt(): expected '%v', got '%v'", e, g)
			}

			updatedAt1, _ := upsertedDoc.UpdatedAt()
			updatedAt2, _ := upsertedDoc2.UpdatedAt()

			if e, g := updatedAt1, updatedAt2; e == g {
				return errors.New("upsertedDoc2.UpdatedAt() should have been different than upsertedDoc.UpdatedAt()")
			}

			// Verify that there is no additional created document in the collection

			results, err := store.Query(ctx, collection, nil)
			if err != nil {
				return errors.WithStack(err)
			}

			if e, g := 1, len(results); e != g {
				return errors.Errorf("len(results): expected '%v', got '%v'", e, g)
			}

			return nil
		},
	},
	{
		Name: "Query order by document field",
		Run: func(ctx context.Context, store storage.DocumentStore) error {
			docs := []storage.Document{
				{
					"sortedField": 0,
					"name":        "Item 1",
				},
				{
					"sortedField": 1,
					"name":        "Item 2",
				},
				{
					"sortedField": 2,
					"name":        "Item 3",
				},
			}

			collection := "ordered_query_by_document_field"

			for _, doc := range docs {
				if _, err := store.Upsert(ctx, collection, doc); err != nil {
					return errors.WithStack(err)
				}
			}

			results, err := store.Query(
				ctx, collection, nil,
				storage.WithOrderBy("sortedField"),
				storage.WithOrderDirection(storage.OrderDirectionAsc),
			)
			if err != nil {
				return errors.WithStack(err)
			}

			if e, g := 3, len(results); e != g {
				return errors.Errorf("len(results): expected '%v', got '%v'", e, g)
			}

			if e, g := docs[0]["name"], results[0]["name"]; e != g {
				return errors.Errorf("results[0][\"name\"]: expected '%v', got '%v'", e, g)
			}

			if e, g := docs[2]["name"], results[2]["name"]; e != g {
				return errors.Errorf("results[2][\"name\"]: expected '%v', got '%v'", e, g)
			}

			results, err = store.Query(
				ctx, collection, nil,
				storage.WithOrderBy("sortedField"),
				storage.WithOrderDirection(storage.OrderDirectionDesc),
			)
			if err != nil {
				return errors.WithStack(err)
			}

			if e, g := 3, len(results); e != g {
				return errors.Errorf("len(results): expected '%v', got '%v'", e, g)
			}

			if e, g := docs[2]["name"], results[0]["name"]; e != g {
				return errors.Errorf("results[0][\"name\"]: expected '%v', got '%v'", e, g)
			}

			if e, g := docs[0]["name"], results[2]["name"]; e != g {
				return errors.Errorf("results[2][\"name\"]: expected '%v', got '%v'", e, g)
			}

			return nil
		},
	},
	{
		Name: "Query order by special attr",
		Run: func(ctx context.Context, store storage.DocumentStore) error {
			docs := []storage.Document{
				{
					"name": "Item 1",
				},
				{
					"name": "Item 2",
				},
				{
					"name": "Item 3",
				},
			}

			collection := "ordered_query_by_special_attr"

			for _, doc := range docs {
				if _, err := store.Upsert(ctx, collection, doc); err != nil {
					return errors.WithStack(err)
				}
			}

			results, err := store.Query(
				ctx, collection, nil,
				storage.WithOrderBy(storage.DocumentAttrCreatedAt),
				storage.WithOrderDirection(storage.OrderDirectionAsc),
			)
			if err != nil {
				return errors.WithStack(err)
			}

			if e, g := 3, len(results); e != g {
				return errors.Errorf("len(results): expected '%v', got '%v'", e, g)
			}

			if e, g := docs[0]["name"], results[0]["name"]; e != g {
				return errors.Errorf("results[0][\"name\"]: expected '%v', got '%v'", e, g)
			}

			if e, g := docs[2]["name"], results[2]["name"]; e != g {
				return errors.Errorf("results[2][\"name\"]: expected '%v', got '%v'", e, g)
			}

			results, err = store.Query(
				ctx, collection, nil,
				storage.WithOrderBy(storage.DocumentAttrCreatedAt),
				storage.WithOrderDirection(storage.OrderDirectionDesc),
			)
			if err != nil {
				return errors.WithStack(err)
			}

			if e, g := 3, len(results); e != g {
				return errors.Errorf("len(results): expected '%v', got '%v'", e, g)
			}

			if e, g := docs[2]["name"], results[0]["name"]; e != g {
				return errors.Errorf("results[0][\"name\"]: expected '%v', got '%v'", e, g)
			}

			if e, g := docs[0]["name"], results[2]["name"]; e != g {
				return errors.Errorf("results[2][\"name\"]: expected '%v', got '%v'", e, g)
			}

			return nil
		},
	},
	{
		Name: "Query limit and offset",
		Run: func(ctx context.Context, store storage.DocumentStore) error {
			docs := []storage.Document{
				{"name": "Item 1"},
				{"name": "Item 2"},
				{"name": "Item 3"},
				{"name": "Item 4"},
			}

			collection := "query_limit_and_offset"

			for _, doc := range docs {
				if _, err := store.Upsert(ctx, collection, doc); err != nil {
					return errors.WithStack(err)
				}
			}

			results, err := store.Query(
				ctx, collection, nil,
				storage.WithLimit(2),
			)
			if err != nil {
				return errors.WithStack(err)
			}

			if e, g := 2, len(results); e != g {
				return errors.Errorf("len(results): expected '%v', got '%v'", e, g)
			}

			if e, g := docs[0]["name"], results[0]["name"]; e != g {
				return errors.Errorf("results[0][\"name\"]: expected '%v', got '%v'", e, g)
			}

			if e, g := docs[1]["name"], results[1]["name"]; e != g {
				return errors.Errorf("results[1][\"name\"]: expected '%v', got '%v'", e, g)
			}

			results, err = store.Query(
				ctx, collection, nil,
				storage.WithOffset(2),
			)
			if err != nil {
				return errors.WithStack(err)
			}

			if e, g := 2, len(results); e != g {
				return errors.Errorf("len(results): expected '%v', got '%v'", e, g)
			}

			if e, g := docs[2]["name"], results[0]["name"]; e != g {
				return errors.Errorf("results[0][\"name\"]: expected '%v', got '%v'", e, g)
			}

			if e, g := docs[3]["name"], results[1]["name"]; e != g {
				return errors.Errorf("results[1][\"name\"]: expected '%v', got '%v'", e, g)
			}

			return nil
		},
	},
}

func testDocumentStoreOps(t *testing.T, store storage.DocumentStore) {
	for _, tc := range documentStoreOpsTestCases {
		func(tc documentStoreOpsTestCase) {
			t.Run(tc.Name, func(t *testing.T) {
				if err := tc.Run(context.Background(), store); err != nil {
					t.Errorf("%+v", errors.WithStack(err))
				}
			})
		}(tc)
	}
}