import (
    "github.com/gofiber/fiber/v2"
    "github.com/go-playground/validator/v10"
    "example.org/internal/database"
    "example.org/internal/db" // sqlc generated package
)

var (
    validate = validator.New()
)

func ValidateStruct(model interface{}) []*ErrorResponse {

	var errors []*ErrorResponse
	err := validate.Struct(model)
	if err != nil {
		for _, err := range err.(validator.ValidationErrors) {
			var element ErrorResponse
			element.FailedField = err.StructNamespace()
			element.Tag = err.Tag()
			element.Value = err.Param()
			errors = append(errors, &element)
		}
	}
	return errors
}

func CreateUser(c *fiber.Ctx) error {
	// user struct contains struct tags for "github.com/go-playground/validator/v10" defined in sqlc.yaml
	userPayload := &db.User{}

	err := c.BodyParser(&userPayload)
	if err != nil {
		return MessageBadRequest(c, "failure while binding payload data to structured data")
	}

	errors := ValidateStruct(*userPayload)
	if errors != nil {
		return MessageBadRequest(c, errors)
	}

	queries := database.GetQueries()
	ctx, cancel := database.NewContext()

	defer cancel()

	// CreateUserParams is missing custom struct tags for "github.com/go-playground/validator/v10" defined in sqlc.yaml
	insertedUser, err := queries.CreateUser(ctx, db.CreateUserParams{
		// ...
	})
	if err != nil {
		return err
	}

	return MessageOK(c, insertedUser)
}