#!/usr/bin/env python3

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from os import access, R_OK, W_OK
from os.path import dirname
from zenmapCore.Paths import Path


class TargetList(object):
    def __init__(self):
        self.temp_list = []

        try:
            self.target_list_file = Path.target_list
        except Exception:
            self.target_list_file = False

        #import pdb; pdb.set_trace()
        if (self.target_list_file and
                (access(self.target_list_file, R_OK and W_OK) or
                    access(dirname(self.target_list_file), R_OK and W_OK))):
            self.using_file = True

            # Recovering saved targets
            for enc in ('utf-8', None):
                try:
                    with open(self.target_list_file, "r", encoding=enc) as target_file:
                        self.temp_list = [
                                t for t in target_file.read().split(";")
                                if t != "" and t != "\n"]
                except UnicodeDecodeError:
                    continue
                break
        else:
            self.using_file = False

    def save(self):
        if self.using_file:
            target_file = open(self.target_list_file, "w", encoding="utf-8")
            target_file.write(";".join(self.temp_list))
            target_file.close()

    def add_target(self, target):
        if target in self.temp_list:
            return

        self.temp_list.append(target)
        self.save()

    def clean_list(self):
        del self.temp_list
        self.temp_list = []
        self.save()

    def get_target_list(self):
        t = self.temp_list[:]
        t.reverse()
        return t

target_list = TargetList()

if __name__ == "__main__":
    t = TargetList()
    print(">>> Getting empty list:", t.get_target_list())
    print(">>> Adding target 127.0.0.1:", t.add_target("127.0.0.3"))
    print(">>> Getting target list:", t.get_target_list())
    del t
