import tkinter as tk
from tkinter import scrolledtext
import os
import time
import getpass
from json import loads

CHAT_FILE = "C:/Users/Public/r2chat/chat.txt"
REFRESH_INTERVAL = 1000

BORDER_WIDTH = 3
THEMES = [['white','white','white','black','Basic'],['#000707','#002727','#001717','white','Aqua']]

username = getpass.getuser()
CONFIG_FILE = f'C:/r2chat/legacy_config/{username}.r2cc'

if not os.path.exists(CONFIG_FILE):
    CFILE_C=open(CONFIG_FILE, "a")
    CFILE_C.write('0\n is now online.\n is now offline.')
    CFILE_C.close()

def conf_line(n):
    return((open(CONFIG_FILE).read()).split('\n')[n])

THEME = int(conf_line(0))
JOIN_MESSAGE = conf_line(1)
LEAVE_MESSAGE = conf_line(2)

class r2chat:
    def __init__(self, root):
        self.root = root
        self.root.title(f"r2chat Legacy :: {username}")

        self.last_size = 0

        self.chat_area = scrolledtext.ScrolledText(root, wrap='word', font=("Lucida Console", 11), bg=THEMES[THEME][1], fg=THEMES[THEME][3], relief='groove', borderwidth=BORDER_WIDTH)
        self.chat_area.pack(padx=10, pady=10, fill=tk.BOTH, expand=True)
        self.chat_area.bind("<Key>", lambda e: "break")

        self.entry = tk.Entry(root, font=("Lucida Console", 11), bg=THEMES[THEME][2], fg=THEMES[THEME][3], relief='groove', borderwidth=BORDER_WIDTH)
        self.entry.pack(padx=10, pady=(0, 10), fill=tk.X)
        self.entry.bind("<Return>", self.send_message)

        if not os.path.exists(CHAT_FILE):
            open(CHAT_FILE, "a").close()

        self.update_chat()
        self.write_system_message(f"{username}{JOIN_MESSAGE}")

    def on_close(self):
        self.write_system_message(f"{username}{LEAVE_MESSAGE}")
        self.root.destroy()

    def write_system_message(self, msg):
        line = f"---- {msg} ----\n"
        with open(CHAT_FILE, "a", encoding="utf-8") as f:
            f.write(line)

    def send_message(self, event=None):
        msg = self.entry.get().strip()
        if msg:
            timestamp = time.strftime("%y/%m/%d %H:%M")
            line = f"[{timestamp}] {username} (legacy): {msg}\n"
            try:
                with open(CHAT_FILE, "a", encoding="utf-8") as f:
                    f.write(line)
            except Exception as e:
                print("oh noes! ", e)

            self.entry.delete(0, tk.END)

    def update_chat(self):
        try:
            current_size = os.path.getsize(CHAT_FILE)

            if current_size > self.last_size:
                with open(CHAT_FILE, "r", encoding="utf-8") as f:
                    f.seek(self.last_size)
                    new_data = f.read()
                    self.last_size = current_size
                self.chat_area.config(state='normal')
                self.chat_area.insert(tk.END, new_data)
                self.chat_area.config(state='disabled')
                self.chat_area.yview(tk.END)

        except Exception as e:
            print("oh noes! ", e)

        self.root.after(REFRESH_INTERVAL, self.update_chat)


if __name__ == "__main__":
    root = tk.Tk()
    app = r2chat(root)
    root.geometry("500x520")
    root.minsize(360, 520)
    root.attributes('-topmost', True)
    root.protocol("WM_DELETE_WINDOW", app.on_close)
    root.configure(bg=THEMES[THEME][0])
    root.mainloop()