from util import find_data_file
from util import setup_child
from util import fprint
from util import run_cmd
from util import win32
from util import linux
from util import macos
import util
import time
import csv



def process(data):
    setup_child()
    fprint("netstat processing")
    if win32:
        #output = data.stdout
        #print(output)
        output = data.stdout.decode().split('\r\n') # split stdout into lines
        #print(output)
        if output[0].find("The requested operation requires elevation.") >= 0:
            #print("test3")
            raise PermissionError("Unable to acquire netstat data without admin!")
        #print("test2")
        output2 = list()
        output2.append([util.sysid, util.userid, util.sysdom, util.time()]) # add metadata
        #print(output2)
        procname = ""
        """for x in range(4, len(output)):
                tmp = output[x].split(" ")
                print(tmp)
                tmp = [i for i in output[x] if i]
                print(tmp)
                print(len(tmp))
                if len(len(tmp) == 1):
                    procname = tmp[0]
                    print(x)
                else:
                    print(x)
                    output2[x] = list()
                    output2[x].append(procname)
                    output2[x].append(output[x].split(" "))
                    output2[x] = [i for i in output2[x] if i]
        output2 = [i for i in output2 if i]
        print(output2)"""
        x = len(output) - 1 # start at the end because filename comes after connection
        procname = "Unknown" # if the very last connection happens to have no file (yes, it's possible), we can say unknown
        while x > 3:
            string = output[x]
            #print("LINE: ", string)
            string_split = string.split(" ")
            string_split = [i for i in string_split if i]
            if string.find("Can not obtain ownership information") >= 0: # Higher privilige than us, must be system
                procname = "Windows System"
            elif string.find("]") >= 0 and string.find("[") == 1: # generic [file.exe]
                procname = string[2:-1]
            elif len(string_split) == 5: # actual netstat line
                tmp = [procname,] # add executable name first
                tmp.extend(string.split(" "))
                tmp = [i for i in tmp if i]
                #print(tmp)
                output2.append(tmp)
            #else: # In case of an extra line above file, or an empty line, ignore it
                #print("Garbage data", string)
            x = x - 1
        #output2 = output2[2:]
        #print(output2)
        with open(find_data_file(util.datafile), "w", newline="") as f:
            writer = csv.writer(f)
            writer.writerows(output2)
        fprint("done creating csv")
    
    if linux or macos:
        output = data.stdout.decode().split('\n') # split stdout into lines
        #output = data.stdout.decode().split(',')
        #fprint("output data: " + str(output))
        output = [i for i in output if i]
        if output[0].find("Not all processes could be identified") >= 0:
            fprint("Not enough permissions")
            raise PermissionError("Unable to acquire netstat data without admin!")
        output2 = list()
        output2.append([util.sysid, util.userid, util.sysdom, util.time()]) # add metadata
        for line in output:
            string_split = line.split(" ")
            string_split = [i for i in string_split if i]
            #fprint("Input: " + str(string_split))

            if string_split[1].find("Multipath") >= 0:
                break
            if string_split[0].find("Active") >= 0 or string_split[0].find("Proto") >= 0:
                continue
            
            if len(string_split) == 10: # no connection status
                #fprint(string_split)
                string_split.append(string_split[-1])
                string_split[-7] = "UNKNOWN"
                string_split[-4] = string_split[-5]
                #fprint(string_split)
            
           
            
            output2.append(["Unknown", string_split[0], string_split[3], string_split[4], string_split[5], string_split[8]]) 
        #fprint("FINAL CSV: " + str(output2))
        
        with open(find_data_file(util.datafile), "w", newline="") as f:
            writer = csv.writer(f)
            writer.writerows(output2)
        fprint("done creating csv")
        

def start():
    setup_child()
    fprint("netstat started")
    
    if win32:
        data = run_cmd("netstat -n -o -b")
        fprint("data acquired")
        return data

    if linux:
        data = run_cmd("netstat -atunpw")
        fprint("data acquired")
        return data

    if macos:
        data = run_cmd("netstat -anv")
        fprint("data acquired")
        return data