"""Domain error types.

Use these instead of bare exceptions so services/routers can map them to
meaningful HTTP responses. Never swallow errors silently (see ARCHITECTURE.md §10).
"""


class DomainError(Exception):
    """Base class for all application-domain errors."""


class NotFoundError(DomainError):
    """Raised when an entity cannot be found by its identifier."""


class ValidationError(DomainError):
    """Raised when input fails a business rule (not just schema validation)."""


class InsufficientDaysError(DomainError):
    """Raised when a parent doesn't have enough remaining days to plan."""


class InvalidDayTypeError(ValidationError):
    """Raised when a planned-day type is not recognized."""


class DubbeldagError(ValidationError):
    """Raised when a dubbeldag breaks the 15-month window or the 60-day quota."""


class AuthError(DomainError):
    """Raised when credentials are invalid or an auth operation fails."""


class UnauthorizedError(DomainError):
    """Raised when the caller lacks permission to perform an action."""


class ConflictError(DomainError):
    """Raised when a resource already exists (e.g. duplicate email on register)."""


class InvitationError(ValidationError):
    """Raised when an invitation token is invalid, expired, or already redeemed."""