#!/usr/bin/env python3

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# * (https://npcap.com) for packet capture and transmission. It is under
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# ***************************************************************************/

import gi

gi.require_version("Gtk", "3.0")
from gi.repository import Gtk


class ScansListStoreEntry(object):
    """This class is an abstraction for running and completed scans, which are
    otherwise represented by very different classes."""

    # Possible states for the scan to be in.
    UNINITIALIZED, RUNNING, FINISHED, FAILED, CANCELED = list(range(5))

    def __init__(self):
        self.state = self.UNINITIALIZED
        self.command = None
        self.parsed = None

    def set_running(self, command=None):
        self.state = self.RUNNING
        self.command = command

    def set_finished(self, parsed=None):
        self.state = self.FINISHED
        self.parsed = parsed

    def set_failed(self):
        self.state = self.FAILED

    def set_canceled(self):
        self.state = self.CANCELED

    def get_command_string(self):
        if self.parsed is not None:
            return self.parsed.get_nmap_command()
        elif self.command is not None:
            return self.command.command
        else:
            return None

    running = property(lambda self: self.state == self.RUNNING)
    finished = property(lambda self: self.state == self.FINISHED)
    failed = property(lambda self: self.state == self.FAILED)
    canceled = property(lambda self: self.state == self.CANCELED)


class ScansListStore(Gtk.ListStore):
    """This is a specialization of a Gtk.ListStore that holds running,
    completed, and failed scans."""
    def __init__(self):
        Gtk.ListStore.__init__(self, object)

    def add_running_scan(self, command):
        """Add a running NmapCommand object to the list of scans."""
        entry = ScansListStoreEntry()
        entry.set_running(command)
        return self.append([entry])

    def finish_running_scan(self, command, parsed):
        """Find an existing NmapCommand object and replace it with the given
        parsed representation."""
        i = self._find_running_scan(command)
        if i is not None:
            entry = self.get_value(i, 0)
            entry.set_finished(parsed)
            path = self.get_path(i)
            self.row_changed(path, i)
            return i

    def fail_running_scan(self, command):
        """Mark a running scan as failed."""
        i = self._find_running_scan(command)
        if i is not None:
            entry = self.get_value(i, 0)
            entry.set_failed()
            path = self.get_path(i)
            self.row_changed(path, i)
            return i

    def cancel_running_scan(self, command):
        """Mark a running scan as canceled."""
        i = self._find_running_scan(command)
        if i is not None:
            entry = self.get_value(i, 0)
            entry.set_canceled()
            path = self.get_path(i)
            self.row_changed(path, i)
            return i

    def add_scan(self, parsed):
        """Add a parsed NmapParser object to the list of scans."""
        entry = ScansListStoreEntry()
        entry.set_finished(parsed)
        return self.append([entry])

    def _find_running_scan(self, command):
        """Find the scan entry whose command is command."""
        i = self.get_iter_first()
        while i is not None:
            entry = self.get_value(i, 0)
            if entry.command is command:
                return i
            i = self.iter_next(i)
        return None
