package memoryexecutor_test

import (
	"reflect"
	"testing"

	"github.com/pikami/cosmium/parsers"
	memoryexecutor "github.com/pikami/cosmium/query_executors/memory_executor"
)

func testQueryExecute(
	t *testing.T,
	query parsers.SelectStmt,
	data []memoryexecutor.RowType,
	expectedData []memoryexecutor.RowType,
) {
	result := memoryexecutor.Execute(query, data)

	if !reflect.DeepEqual(result, expectedData) {
		t.Errorf("execution result does not match expected data.\nExpected: %+v\nGot: %+v", expectedData, result)
	}
}

func Test_Execute(t *testing.T) {
	mockData := []memoryexecutor.RowType{
		map[string]interface{}{"id": "12345", "pk": 123, "_self": "self1", "_rid": "rid1", "_ts": 123456, "isCool": false},
		map[string]interface{}{"id": "67890", "pk": 456, "_self": "self2", "_rid": "rid2", "_ts": 789012, "isCool": true},
		map[string]interface{}{"id": "456", "pk": 456, "_self": "self2", "_rid": "rid2", "_ts": 789012, "isCool": true},
		map[string]interface{}{"id": "123", "pk": 456, "_self": "self2", "_rid": "rid2", "_ts": 789012, "isCool": true},
	}

	t.Run("Should execute SELECT with ORDER BY", func(t *testing.T) {
		testQueryExecute(
			t,
			parsers.SelectStmt{
				SelectItems: []parsers.SelectItem{
					{Path: []string{"c", "id"}},
					{Path: []string{"c", "pk"}},
				},
				Table: parsers.Table{Value: "c"},
				OrderExpressions: []parsers.OrderExpression{
					{
						SelectItem: parsers.SelectItem{Path: []string{"c", "pk"}},
						Direction:  parsers.OrderDirectionAsc,
					},
					{
						SelectItem: parsers.SelectItem{Path: []string{"c", "id"}},
						Direction:  parsers.OrderDirectionDesc,
					},
				},
			},
			mockData,
			[]memoryexecutor.RowType{
				map[string]interface{}{"id": "12345", "pk": 123},
				map[string]interface{}{"id": "67890", "pk": 456},
				map[string]interface{}{"id": "456", "pk": 456},
				map[string]interface{}{"id": "123", "pk": 456},
			},
		)
	})

	t.Run("Should execute SELECT with GROUP BY", func(t *testing.T) {
		testQueryExecute(
			t,
			parsers.SelectStmt{
				SelectItems: []parsers.SelectItem{
					{Path: []string{"c", "pk"}},
				},
				Table: parsers.Table{Value: "c"},
				GroupBy: []parsers.SelectItem{
					{Path: []string{"c", "pk"}},
				},
			},
			mockData,
			[]memoryexecutor.RowType{
				map[string]interface{}{"pk": 123},
				map[string]interface{}{"pk": 456},
			},
		)
	})

	t.Run("Should execute IN function", func(t *testing.T) {
		testQueryExecute(
			t,
			parsers.SelectStmt{
				SelectItems: []parsers.SelectItem{
					{
						Path: []string{"c", "id"},
						Type: parsers.SelectItemTypeField,
					},
				},
				Table: parsers.Table{Value: "c"},
				Filters: parsers.SelectItem{
					Type: parsers.SelectItemTypeFunctionCall,
					Value: parsers.FunctionCall{
						Type: parsers.FunctionCallIn,
						Arguments: []interface{}{
							parsers.SelectItem{
								Path: []string{"c", "id"},
								Type: parsers.SelectItemTypeField,
							},
							parsers.SelectItem{
								Type: parsers.SelectItemTypeConstant,
								Value: parsers.Constant{
									Type:  parsers.ConstantTypeString,
									Value: "123",
								},
							},
							parsers.SelectItem{
								Type: parsers.SelectItemTypeConstant,
								Value: parsers.Constant{
									Type:  parsers.ConstantTypeString,
									Value: "456",
								},
							},
						},
					},
				},
			},
			mockData,
			[]memoryexecutor.RowType{
				map[string]interface{}{"id": "456"},
				map[string]interface{}{"id": "123"},
			},
		)
	})
}