import tkinter as tk
from tkinter import ttk
from process import process_frame
from PIL import Image, ImageTk  # Required for displaying images
import cv2  # OpenCV for numpy array to image conversion

class OpenCVInterface:
    def __init__(self, root):
        self.root = root
        self.root.title("Yiking")

        # Variables for sliders with min, max, and default values
        self.variables_config = {
            "minDist": (0, 500, 100),
            "param1": (0, 500, 30),
            "param2": (0, 400, 25),
            "minRadius": (0, 100, 5),
            "maxRadius": (0, 1000, 1000),
            "color1_R": (0, 64, 5),
            "color1_V": (0, 64, 5),
            "color1_B": (0, 64, 5),
            "color2_R": (0, 64, 5),
            "color2_V": (0, 64, 5),
            "color2_B": (0, 64, 5),
        }

        self.variables = {
            name: tk.IntVar(value=config[2]) for name, config in self.variables_config.items()
        }

        # GUI Layout
        self.setup_gui()

    def setup_gui(self):
        # Root grid layout
        self.root.rowconfigure(1, weight=1)
        self.root.columnconfigure(0, weight=1)
        self.root.columnconfigure(1, weight=1)

        # Left Column: Sliders
        left_frame = ttk.Frame(self.root)
        left_frame.grid(row=0, column=0, sticky="nswe")

        for var_name, var in self.variables.items():
            min_val, max_val, _ = self.variables_config[var_name]
            self.create_slider(left_frame, var_name, var, min_val, max_val)

        # Right Column: Image Placeholder
        self.image_canvas = tk.Canvas(self.root, bg="gray", width=1024, height=768)
        self.image_canvas.grid(row=0, column=1, sticky="nswe")

        # Bottom Row: Run Button and Result
        run_button = ttk.Button(self.root, text="Run", command=self.run_process)
        run_button.grid(row=1, column=0, sticky="we")

        self.result_text = tk.Text(self.root, height=10, width=40)
        self.result_text.grid(row=1, column=1, sticky="nswe")

    def create_slider(self, parent, name, variable, min_val, max_val):
        frame = ttk.Frame(parent)
        frame.pack(fill="x", padx=5, pady=2)

        # Label
        label = ttk.Label(frame, text=name)
        label.pack(side="left")

        def on_slide(value):
            # Round value to nearest multiple of 5
            rounded_value = round(float(value) / 5) * 5
            variable.set(int(rounded_value))  # Update the variable with the rounded value

        # Slider
        slider = ttk.Scale(
            frame, from_=min_val, to=max_val,
            variable=variable, orient="horizontal", command=on_slide
        )
        slider.pack(side="left", fill="x", expand=True, padx=5)

        # Entry box
        entry = ttk.Entry(frame, textvariable=variable, width=5)
        entry.pack(side="left")

    def run_process(self):
        # Collect slider values
        parameters = {key: var.get() for key, var in self.variables.items()}

        try:
            # Call process function
            image, result_text = process_frame(parameters)

            # Convert OpenCV image (numpy array) to PIL Image for Tkinter display
            if image is not None:
                image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)  # Convert BGR to RGB
                pil_image = Image.fromarray(image)  # Convert numpy array to PIL Image

                # Rescale image to fit within 1024x768 while preserving aspect ratio
                max_width, max_height = 1024, 768
                original_width, original_height = pil_image.size
                aspect_ratio = min(max_width / original_width, max_height / original_height)
                new_width = int(original_width * aspect_ratio)
                new_height = int(original_height * aspect_ratio)
                pil_image = pil_image.resize((new_width, new_height), Image.Resampling.LANCZOS)

                tk_image = ImageTk.PhotoImage(pil_image)  # Convert PIL Image to Tkinter Image

                # Clear canvas and display the image
                self.image_canvas.delete("all")
                self.image_canvas.create_image(512, 384, image=tk_image, anchor="center")
                self.image_canvas.image = tk_image  # Keep a reference to prevent garbage collection

            # Update result text
            self.result_text.delete(1.0, tk.END)
            self.result_text.insert(tk.END, result_text)
        except Exception as exc:
            # Handle and display exceptions
            self.result_text.delete(1.0, tk.END)
            self.result_text.insert(tk.END, str(exc))
            self.image_canvas.delete("all")

if __name__ == "__main__":
    root = tk.Tk()
    app = OpenCVInterface(root)
    root.mainloop()