from tkinter import *


WLC = """
PyTerminal - 0.0.1
pt.help | pt.github
"""

class pt:
    help = 'some help!'
    github = 'github link'


class Gui:
    def __init__(self, root):
        self.Space = 70  # space between >>> and second >>>, ideal: 70
        self.root = root

        root.geometry('700x400')
        root.title('PyTerminal')
        root.configure(background='black')
        root.option_add('*font', 'calibri 12')

        Label(root, text=WLC, fg='light blue', bg='black').place(x=0, y=0)

        ent = self._in(0, 70, 30, 72)  # first >>>, numbers in format: x1, y1, x2, y2
        ent.bind("<Return>", (lambda event: self.processcmd(ent)))

    def processcmd(self, cmd):
        self.Space += 60  # add gap, ideal: 60
        cmd.unbind('<Return>')

        return self._out(0, self.Space-30, cmd.get())

    def _in(self, sx, sy, cx, cy):
        Label(self.root, text=f'>>>', fg='dark grey', bg='black').place(x=sx, y=sy)
        cmd = Entry(self.root, bg='black', fg='white', borderwidth=0, width=500, insertbackground='white')
        cmd.place(x=cx, y=cy)
        return cmd

    def _out(self, x, y, cmd):
        To_Deduct = 0
        try:
            Label(self.root, text=eval(cmd), fg='white', bg='black').place(x=x, y=y)
        except:
            try:
                exec(cmd, globals())
                To_Deduct = 30
            except Exception as e:
                Label(self.root, text=e, fg='red', bg='black').place(x=x, y=y-To_Deduct)

        entry = self._in(0, self.Space-To_Deduct, 30, (self.Space + 2)-To_Deduct)
        entry.bind("<Return>", (lambda event: self.processcmd(entry)))

        if To_Deduct:
            self.Space -= 30  # remove some space in case theres anything to deduct (no "empty" rows"), ideal: 30
        return 'OK'

gui = Gui(Tk())

class ModifiedPrint:
    def __init__(self):
        self.old = sys.stdout

    def write(self, text):
        sys.stdout = self.old
        Label(gui.root, text=text, fg='white', bg='black').place(x=0, y=gui.Space-30)
        sys.stdout = self

    def flush(self):
        self.old.flush()


sys.stdout = ModifiedPrint()

gui.root.mainloop()