package usecase

import (
	"errors"
	"fmt"

	"go.maximumdirect.net/promptkit/internal/profile"
	"go.maximumdirect.net/promptkit/internal/promptdef"
)

// OperationError identifies the operation that owns a failure while retaining
// the original cause for inspection.
type OperationError struct {
	Category error
	Cause    error
}

func (e *OperationError) Error() string        { return fmt.Sprintf("%v: %v", e.Category, e.Cause) }
func (e *OperationError) Unwrap() error        { return e.Cause }
func (e *OperationError) Is(target error) bool { return target == e.Category }

func promptLookupError(cause error) error {
	category := ErrPromptLoad
	if errors.Is(cause, promptdef.ErrPromptDefinitionNotFound) {
		category = promptdef.ErrPromptDefinitionNotFound
		cause = fmt.Errorf("%w: %w", ErrPromptLoad, cause)
	}
	return &OperationError{Category: category, Cause: cause}
}

func profileLookupError(cause error) error {
	category := ErrProfileLoad
	if errors.Is(cause, profile.ErrProfileNotFound) {
		category = profile.ErrProfileNotFound
		cause = fmt.Errorf("%w: %w", ErrProfileLoad, cause)
	}
	return &OperationError{Category: category, Cause: cause}
}