from tkinter import *
import random


class Converter:
    """
    Currency Converter GUI
    """

    def __init__(self, parent):
        self.converter_frame = Frame(padx=10, pady=10)
        self.converter_frame.grid()

        self.converter_heading = Label(self.converter_frame,
                                       text="Temperature Converter",
                                       font=("Arial", "16", "bold")
                                       )
        self.converter_heading.grid(row=0)

        instructions = ("Please enter an amount of money below and then press "
                        "one of the buttons to convert it from USD "
                        "to NZD.")
        self.instructions = Label(self.converter_frame,
                                  text=instructions,
                                  wraplength=250, width=40,
                                  justify="left")
        self.instructions.grid(row=1)

        self.converter_entry = Entry(self.converter_frame,
                                     font=("Arial", "14")
                                     )
        self.converter_entry.grid(row=2, padx=10, pady=10)

        error = "Please enter a number"
        self.answer_error = Label(self.converter_frame, text=error,
                                  fg="#9C0000")
        self.answer_error.grid(row=3)

        # Conversion, help and history / export buttons
        self.button_frame = Frame(self.converter_frame)
        self.button_frame.grid(row=4)

        self.to_NZD_button = Button(self.button_frame,
                                    text="To NZD",
                                    bg="#990099",
                                    fg="#ffffff",
                                    font=("Arial", "12", "bold"), width=12)
        self.to_NZD_button.grid(row=0, column=0, padx=5, pady=5)

        self.to_USD_button = Button(self.button_frame,
                                    text="To USD",
                                    bg="#008000",
                                    fg="#ffffff",
                                    font=("Arial", "12", "bold"), width=12)
        self.to_USD_button.grid(row=0, column=1, padx=5, pady=5)

        self.help_info_button = Button(self.button_frame,
                                       text="Help / Info",
                                       bg="#CC6600",
                                       fg="#ffffff",
                                       font=("Arial", "12", "bold"), width=12)
        self.help_info_button.grid(row=1, column=0, padx=5, pady=5)

        self.history_export_button = Button(self.button_frame,
                                            text="History / Export",
                                            bg="#004C99",
                                            fg="#ffffff",
                                            font=("Arial", "12", "bold"), width=12)
        self.history_export_button.grid(row=1, column=1, padx=5, pady=5)

    # main routine


if __name__ == "__main__":
    root = Tk()
    root.title("Currency converter")
    something = Converter(root)
    root.mainloop()