import tkinter as tk
from tkinter import ttk
import math

from matplotlib.figure import Figure
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg


root = tk.Tk()
root.title("Sine Wave Generator")
root.geometry("800x600")


# -----------------------------
# Matplotlib
# -----------------------------
fig = Figure(figsize=(7, 5), dpi=100)
ax = fig.add_subplot(111)

canvas = FigureCanvasTkAgg(fig, master=root)
canvas.get_tk_widget().pack(
    side="top",
    fill="both",
    expand=True
)


# -----------------------------
# Frequency
# -----------------------------
frequency = tk.DoubleVar(value=1.0)


def update_plot(value):
    f = float(value)

    # Update the label
    frequency_label.config(
        text=f"Frequency: {f:.1f} Hz"
    )

    # Create time values
    x = [
        i / 999
        for i in range(1000)
    ]

    # Create sine wave
    y = [
        math.sin(2 * math.pi * f * t)
        for t in x
    ]

    # Update plot
    ax.clear()
    ax.plot(x, y)

    ax.set_title(f"Sine Wave - {f:.1f} Hz")
    ax.set_xlabel("Time (seconds)")
    ax.set_ylabel("Amplitude")

    ax.set_xlim(0, 1)
    ax.set_ylim(-1.2, 1.2)
    ax.grid(True)

    canvas.draw_idle()


# -----------------------------
# Frequency label
# -----------------------------
frequency_label = ttk.Label(
    root,
    text="Frequency: 1.0 Hz",
    font=("Arial", 14)
)

frequency_label.pack(
    side="bottom",
    pady=5
)


# -----------------------------
# Slider
# -----------------------------
slider = ttk.Scale(
    root,
    from_=0.1,
    to=10.0,
    orient="horizontal",
    variable=frequency,
    command=update_plot
)

slider.pack(
    side="bottom",
    fill="x",
    padx=20,
    pady=10
)


# -----------------------------
# Initial plot
# -----------------------------
update_plot(str(frequency.get()))

root.mainloop()