import customtkinter as CTk
from threading import Thread, Event
from scripts.Message import Reply  # Assuming this module correctly handles the message layout
from tkinter import filedialog
from scripts.BaseOllama import OllamaChatBot
from scripts.Rag import Rag
import queue
CODE_PREFIX = "[1337]"
USER = ("User", "Bot")

class ChatGUI(CTk.CTk):
    def __init__(self, base_url='http://localhost:11434', embeddings_url= 'http://localhost:11434', base_model='mistral',
                 embeddings_model='mxbai-embed-large',base_header= None, embeddings_header= None):
        super().__init__()
        CTk.set_appearance_mode("dark")
        CTk.set_default_color_theme("theme/havard_theme.json")
        self.message_queue = queue.Queue()
        self.stop_event = Event()
        self.bot = OllamaChatBot(base_url=base_url, model=base_model, headers=base_header)
        self.rag = Rag(base_url_llm=base_url, base_url_embed=embeddings_url, model=base_model,embeddings=embeddings_model, embeddings_header=embeddings_header,
                       base_header=base_header)
        self.context = None
        self.history = []
        self.create_widgets()
        self.start_message_processing_thread()
    
    def get_response_from_ollama(self, prompt: str, context: str):
        try:
            if context !=  "":
                if self.context != context:
                    checks = self.rag.receive_data(file_path=context)
                    if checks[0]:
                        return checks[1]
                    else:
                        self.context = context
                        self.rag.init_ollama()
        
                return  self.rag.get_request(prompt=prompt)

            else:
                return self.bot.get_request(prompt=prompt)
        except ValueError as e:
            return f"An unexpected Error occuried: {e}"
    
    def on_send(self, event=None):
        message = self.entry_bar.get().strip()
        context = self.file_entry.get().strip()
        if message:
            user = Reply(master=self.messages_frame,reply_type = "You", message=message)
            self.history.append(user)
            user.pack(anchor="e", padx=5, pady=2)
            self.entry_bar.delete(0, CTk.END)  # Clear input field after sending
            Thread(target=lambda q, arg1, arg2: q.put(self.get_response_from_ollama(arg1, arg2)), args=(self.message_queue, message, context)).start()

    def show_reply(self, message: str):
        bot_reply = Reply(master=self.messages_frame,reply_type = "Fabelous-AI-Bot", message=message)
        self.history.append(bot_reply)
        bot_reply.pack(anchor="w", padx=5, pady=2)
        self.message_queue.task_done()
    
    def process_messages(self):
        while not self.stop_event.is_set():
            try:
                message = self.message_queue.get(timeout=1)
                self.show_reply(message)
            except queue.Empty:
                continue
    
    def select_file(self):
        file_path = filedialog.askopenfilename()
        self.file_entry.delete(0, "end")
        self.file_entry.insert(0, file_path)
    
    def create_widgets(self):
        self.geometry("900x600")
        self.title("Fabelous-Ai-Chat")

        self.protocol("WM_DELETE_WINDOW", self.on_close)  # Define window close handler
        self.resizable(True, True)
        self.minsize(475,300)
 
        # Making the grid and widgets expandable
        self.grid_columnconfigure(0, weight=1) 
        self.grid_rowconfigure(1, weight=1) 
 
        # File Loader Entry
        self.file_entry = CTk.CTkEntry(self, placeholder_text="Enter Filepath or press Load File to provide extra context... (check README for more details)")
        self.file_entry.grid(row=0, column=0, sticky="ew", padx=10, pady=(10, 0), columnspan=2)
        # Load File Button
        load_file_btn = CTk.CTkButton(self, text="Load File", command=self.select_file)
        load_file_btn.grid(row=0, column=2, sticky="e", padx=10, pady=(10, 0))
 
        # Messages Frame
        self.messages_frame = CTk.CTkScrollableFrame(self, fg_color="#212121")
        self.messages_frame.grid(row=1, column=0, sticky="nswe", pady=(10, 0), columnspan=4)

 
        # Entry Bar Adjustment for Full Width
        self.entry_bar = CTk.CTkEntry(self, placeholder_text="Type a message...")
        self.entry_bar.grid(row=3, column=0, sticky="ew", padx=10, pady=(10, 10), columnspan=1)
 
        # Send Button
        send_button = CTk.CTkButton(self, text="Send", command=self.on_send)
        send_button.grid(row=3, column=1, sticky="w", padx=10, pady=(10, 10))
        self.entry_bar.bind("<Return>", self.on_send)
    
        # Clear UI Button
        clear_button = CTk.CTkButton(self, text="Clear", command=self.clear_chat) 
        clear_button.grid(row=3, column=2, sticky="w", padx=10, pady=(10, 10))


    def clear_chat(self):
        for message in self.history:
            message.pack_forget()
        self.history = []
        self.bot.messanges = []
        self.rag.init_ollama()
        self.file_entry.delete(0, "end")

    
    def start_message_processing_thread(self):
        # Start background thread for processing incoming messages
        Thread(target=self.process_messages, daemon=True).start()
    
    def on_close(self):
        self.stop_event.set()
        self.destroy()