#!/usr/bin/env python

"""
Copyright (c) 2006-2021 sqlmap developers (http://sqlmap.org/)
See the file 'LICENSE' for copying permission
"""

import os
import re
import socket
import subprocess
import sys
import tempfile
import threading
import webbrowser

from lib.core.common import getSafeExString
from lib.core.common import saveConfig
from lib.core.data import paths
from lib.core.defaults import defaults
from lib.core.enums import MKSTEMP_PREFIX
from lib.core.exception import SqlmapMissingDependence
from lib.core.exception import SqlmapSystemException
from lib.core.settings import DEV_EMAIL_ADDRESS
from lib.core.settings import IS_WIN
from lib.core.settings import ISSUES_PAGE
from lib.core.settings import GIT_PAGE
from lib.core.settings import SITE
from lib.core.settings import VERSION_STRING
from lib.core.settings import WIKI_PAGE
from thirdparty.six.moves import queue as _queue

alive = None
line = ""
process = None
queue = None

def runGui(parser):
    try:
        from thirdparty.six.moves import tkinter as _tkinter
        from thirdparty.six.moves import tkinter_scrolledtext as _tkinter_scrolledtext
        from thirdparty.six.moves import tkinter_ttk as _tkinter_ttk
        from thirdparty.six.moves import tkinter_messagebox as _tkinter_messagebox
    except ImportError as ex:
        raise SqlmapMissingDependence("missing dependence ('%s')" % getSafeExString(ex))

    # Reference: https://www.reddit.com/r/learnpython/comments/985umy/limit_user_input_to_only_int_with_tkinter/e4dj9k9?utm_source=share&utm_medium=web2x
    class ConstrainedEntry(_tkinter.Entry):
        def __init__(self, master=None, **kwargs):
            self.var = _tkinter.StringVar()
            self.regex = kwargs["regex"]
            del kwargs["regex"]
            _tkinter.Entry.__init__(self, master, textvariable=self.var, **kwargs)
            self.old_value = ''
            self.var.trace('w', self.check)
            self.get, self.set = self.var.get, self.var.set

        def check(self, *args):
            if re.search(self.regex, self.get()):
                self.old_value = self.get()
            else:
                self.set(self.old_value)

    # Reference: https://code.activestate.com/recipes/580726-tkinter-notebook-that-fits-to-the-height-of-every-/
    class AutoresizableNotebook(_tkinter_ttk.Notebook):
        def __init__(self, master=None, **kw):
            _tkinter_ttk.Notebook.__init__(self, master, **kw)
            self.bind("<<NotebookTabChanged>>", self._on_tab_changed)

        def _on_tab_changed(self, event):
            event.widget.update_idletasks()

            tab = event.widget.nametowidget(event.widget.select())
            event.widget.configure(height=tab.winfo_reqheight())

    try:
        window = _tkinter.Tk()
    except Exception as ex:
        errMsg = "unable to create GUI window ('%s')" % getSafeExString(ex)
        raise SqlmapSystemException(errMsg)

    window.title(VERSION_STRING)

    # Reference: https://www.holadevs.com/pregunta/64750/change-selected-tab-color-in-ttknotebook
    style = _tkinter_ttk.Style()
    settings = {"TNotebook.Tab": {"configure": {"padding": [5, 1], "background": "#fdd57e"}, "map": {"background": [("selected", "#C70039"), ("active", "#fc9292")], "foreground": [("selected", "#ffffff"), ("active", "#000000")]}}}
    style.theme_create("custom", parent="alt", settings=settings)
    style.theme_use("custom")

    # Reference: https://stackoverflow.com/a/10018670
    def center(window):
        window.update_idletasks()
        width = window.winfo_width()
        frm_width = window.winfo_rootx() - window.winfo_x()
        win_width = width + 2 * frm_width
        height = window.winfo_height()
        titlebar_height = window.winfo_rooty() - window.winfo_y()
        win_height = height + titlebar_height + frm_width
        x = window.winfo_screenwidth() // 2 - win_width // 2
        y = window.winfo_screenheight() // 2 - win_height // 2
        window.geometry('{}x{}+{}+{}'.format(width, height, x, y))
        window.deiconify()

    def onKeyPress(event):
        global line
        global queue

        if process:
            if event.char == '\b':
                line = line[:-1]
            else:
                line += event.char

    def onReturnPress(event):
        global line
        global queue

        if process:
            try:
                process.stdin.write(("%s\n" % line.strip()).encode())
                process.stdin.flush()
            except socket.error:
                line = ""
                event.widget.master.master.destroy()
                return "break"
            except:
                return

            event.widget.insert(_tkinter.END, "\n")

            return "break"

    def run():
        global alive
        global process
        global queue

        config = {}

        for key in window._widgets:
            dest, type = key
            widget = window._widgets[key]

            if hasattr(widget, "get") and not widget.get():
                value = None
            elif type == "string":
                value = widget.get()
            elif type == "float":
                value = float(widget.get())
            elif type == "int":
                value = int(widget.get())
            else:
                value = bool(widget.var.get())

            config[dest] = value

        for option in parser.option_list:
            config[option.dest] = defaults.get(option.dest, None)

        handle, configFile = tempfile.mkstemp(prefix=MKSTEMP_PREFIX.CONFIG, text=True)
        os.close(handle)

        saveConfig(config, configFile)

        def enqueue(stream, queue):
            global alive

            for line in iter(stream.readline, b''):
                queue.put(line)

            alive = False
            stream.close()

        alive = True

        process = subprocess.Popen([sys.executable or "python", os.path.join(paths.SQLMAP_ROOT_PATH, "sqlmap.py"), "-c", configFile], shell=False, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, stdin=subprocess.PIPE, bufsize=1, close_fds=not IS_WIN)

        # Reference: https://stackoverflow.com/a/4896288
        queue = _queue.Queue()
        thread = threading.Thread(target=enqueue, args=(process.stdout, queue))
        thread.daemon = True
        thread.start()

        top = _tkinter.Toplevel()
        top.title("Console")

        # Reference: https://stackoverflow.com/a/13833338
        text = _tkinter_scrolledtext.ScrolledText(top, undo=True)
        text.bind("<Key>", onKeyPress)
        text.bind("<Return>", onReturnPress)
        text.pack()
        text.focus()

        center(top)

        while True:
            line = ""
            try:
                # line = queue.get_nowait()
                line = queue.get(timeout=.1)
                text.insert(_tkinter.END, line)
            except _queue.Empty:
                text.see(_tkinter.END)
                text.update_idletasks()

                if not alive:
                    break

    menubar = _tkinter.Menu(window)

    filemenu = _tkinter.Menu(menubar, tearoff=0)
    filemenu.add_command(label="Open", state=_tkinter.DISABLED)
    filemenu.add_command(label="Save", state=_tkinter.DISABLED)
    filemenu.add_separator()
    filemenu.add_command(label="Exit", command=window.quit)
    menubar.add_cascade(label="File", menu=filemenu)

    menubar.add_command(label="Run", command=run)

    helpmenu = _tkinter.Menu(menubar, tearoff=0)
    helpmenu.add_command(label="Official site", command=lambda: webbrowser.open(SITE))
    helpmenu.add_command(label="Github pages", command=lambda: webbrowser.open(GIT_PAGE))
    helpmenu.add_command(label="Wiki pages", command=lambda: webbrowser.open(WIKI_PAGE))
    helpmenu.add_command(label="Report issue", command=lambda: webbrowser.open(ISSUES_PAGE))
    helpmenu.add_separator()
    helpmenu.add_command(label="About", command=lambda: _tkinter_messagebox.showinfo("About", "Copyright (c) 2006-2021\n\n    (%s)" % DEV_EMAIL_ADDRESS))
    menubar.add_cascade(label="Help", menu=helpmenu)

    window.config(menu=menubar)
    window._widgets = {}

    notebook = AutoresizableNotebook(window)

    first = None
    frames = {}

    for group in parser.option_groups:
        frame = frames[group.title] = _tkinter.Frame(notebook, width=200, height=200)
        notebook.add(frames[group.title], text=group.title)

        _tkinter.Label(frame).grid(column=0, row=0, sticky=_tkinter.W)

        row = 1
        if group.get_description():
            _tkinter.Label(frame, text="%s:" % group.get_description()).grid(column=0, row=1, columnspan=3, sticky=_tkinter.W)
            _tkinter.Label(frame).grid(column=0, row=2, sticky=_tkinter.W)
            row += 2

        for option in group.option_list:
            _tkinter.Label(frame, text="%s " % parser.formatter._format_option_strings(option)).grid(column=0, row=row, sticky=_tkinter.W)

            if option.type == "string":
                widget = _tkinter.Entry(frame)
            elif option.type == "float":
                widget = ConstrainedEntry(frame, regex=r"\A\d*\.?\d*\Z")
            elif option.type == "int":
                widget = ConstrainedEntry(frame, regex=r"\A\d*\Z")
            else:
                var = _tkinter.IntVar()
                widget = _tkinter.Checkbutton(frame, variable=var)
                widget.var = var

            first = first or widget
            widget.grid(column=1, row=row, sticky=_tkinter.W)

            window._widgets[(option.dest, option.type)] = widget

            default = defaults.get(option.dest)
            if default:
                if hasattr(widget, "insert"):
                    widget.insert(0, default)

            _tkinter.Label(frame, text=" %s" % option.help).grid(column=2, row=row, sticky=_tkinter.W)

            row += 1

        _tkinter.Label(frame).grid(column=0, row=row, sticky=_tkinter.W)

    notebook.pack(expand=1, fill="both")
    notebook.enable_traversal()

    first.focus()

    window.mainloop()
