""" Content rules handlers
"""
from plone.app.discussion import _


try:
    from plone.stringinterp.adapters import BaseSubstitution
except ImportError:

    class BaseSubstitution:
        """Fallback class if plone.stringinterp is not available"""

        def __init__(self, context, **kwargs):
            self.context = context


try:
    from plone.app.contentrules.handlers import execute
except ImportError:

    def execute(context, event):
        return False


def execute_comment(event):
    """Execute comment content rules"""
    execute(event.object, event)


class CommentSubstitution(BaseSubstitution):
    """Comment string substitution"""

    def __init__(self, context, **kwargs):
        super().__init__(context, **kwargs)

    @property
    def event(self):
        """event that triggered the content rule"""
        return self.context.REQUEST.get("event")

    @property
    def comment(self):
        """Get changed inline comment"""
        return self.event.comment


class Id(CommentSubstitution):
    """Comment id string substitution"""

    category = _("Comments")
    description = _("Comment id")

    def safe_call(self):
        """Safe call"""
        return getattr(self.comment, "comment_id", "")


class Text(CommentSubstitution):
    """Comment text"""

    category = _("Comments")
    description = _("Comment text")

    def safe_call(self):
        """Safe call"""
        return getattr(self.comment, "text", "")


class AuthorUserName(CommentSubstitution):
    """Comment author user name string substitution"""

    category = _("Comments")
    description = _("Comment author user name")

    def safe_call(self):
        """Safe call"""
        return getattr(self.comment, "author_username", "")


class AuthorFullName(CommentSubstitution):
    """Comment author full name string substitution"""

    category = _("Comments")
    description = _("Comment author full name")

    def safe_call(self):
        """Safe call"""
        return getattr(self.comment, "author_name", "")


class AuthorEmail(CommentSubstitution):
    """Comment author email string substitution"""

    category = _("Comments")
    description = _("Comment author email")

    def safe_call(self):
        """Safe call"""
        return getattr(self.comment, "author_email", "")