// Package apperror defines safe application errors shared across module boundaries.
package apperror

import (
	"errors"
	"fmt"
)

var (
	ErrInvalidInput         = errors.New("invalid input")
	ErrUnauthenticated      = errors.New("authentication required")
	ErrForbidden            = errors.New("permission denied")
	ErrConflict             = errors.New("already exists")
	ErrInsufficientCash     = fmt.Errorf("insufficient available cash: %w", ErrConflict)
	ErrInsufficientQuantity = fmt.Errorf("insufficient sellable quantity: %w", ErrConflict)
	ErrCandidateUnavailable = fmt.Errorf("candidate unavailable: %w", ErrConflict)
	ErrPreviewExpired       = fmt.Errorf("preview expired: %w", ErrConflict)
	ErrChronology           = fmt.Errorf("fill chronology conflict: %w", ErrConflict)
	ErrDependentFill        = fmt.Errorf("later fill depends on this record: %w", ErrConflict)
	ErrNotFound             = errors.New("not found")
	ErrUnavailable          = errors.New("service unavailable")
)