package validator

import (
	"testing"

	"apskel-pos-be/internal/constants"
	"apskel-pos-be/internal/contract"

	"github.com/google/uuid"
	"github.com/stretchr/testify/require"
)

func validCreatePurchaseOrderRequest() *contract.CreatePurchaseOrderRequest {
	return &contract.CreatePurchaseOrderRequest{
		VendorID:        uuid.New(),
		PONumber:        "PO-001",
		TransactionDate: "2026-05-29",
		Items: []contract.CreatePurchaseOrderItemRequest{
			{
				IngredientID: uuid.New(),
				Quantity:     1,
				UnitID:       uuid.New(),
				Amount:       1000,
			},
		},
	}
}

func TestPurchaseOrderValidatorCreateAllowsMissingDueDate(t *testing.T) {
	validator := NewPurchaseOrderValidator()

	err, code := validator.ValidateCreatePurchaseOrderRequest(validCreatePurchaseOrderRequest())

	require.NoError(t, err)
	require.Empty(t, code)
}

func TestPurchaseOrderValidatorCreateRejectsInvalidDueDate(t *testing.T) {
	validator := NewPurchaseOrderValidator()
	req := validCreatePurchaseOrderRequest()
	dueDate := "29-05-2026"
	req.DueDate = &dueDate

	err, code := validator.ValidateCreatePurchaseOrderRequest(req)

	require.Error(t, err)
	require.Equal(t, constants.MalformedFieldErrorCode, code)
	require.Contains(t, err.Error(), "due_date must be in YYYY-MM-DD format")
}

func TestPurchaseOrderValidatorCreateRejectsDueDateBeforeTransactionDate(t *testing.T) {
	validator := NewPurchaseOrderValidator()
	req := validCreatePurchaseOrderRequest()
	dueDate := "2026-05-28"
	req.DueDate = &dueDate

	err, code := validator.ValidateCreatePurchaseOrderRequest(req)

	require.Error(t, err)
	require.Equal(t, constants.MalformedFieldErrorCode, code)
	require.Contains(t, err.Error(), "due_date must be after transaction_date")
}