import tkinter as tk
from tkinter import ttk
from typing import Optional


class SimulationControls(ttk.LabelFrame):
    """Encapsulates the Live Simulation Engine controls.

    This keeps the UI widgets (Start/Stop, Speed, Update Time, Reset, slider)
    in a focused component. It uses the provided main_view reference for
    callbacks and shared Tk variables to preserve existing behavior while
    keeping the layout code out of `main_view.py`.
    """

    def __init__(self, parent, main_view):
        super().__init__(parent, text="Live Simulation Engine")

        self.main_view = main_view

        # Use main_view's variables so external code referencing them keeps
        # working unchanged.
        self.time_multiplier_var = getattr(main_view, "time_multiplier_var", tk.StringVar(value="1x"))
        self.update_time = getattr(main_view, "update_time", tk.DoubleVar(value=1.0))
        self.sim_slider_var = getattr(main_view, "sim_slider_var", tk.DoubleVar(value=0.0))

        # Layout grid setup (mirror MainView original layout)
        for i in range(10):
            self.grid_columnconfigure(i, weight=0)
        self.grid_columnconfigure(0, weight=0)
        self.grid_columnconfigure(3, weight=1)

        # Buttons
        self.start_button = ttk.Button(self, text="Start Live", command=self._start)
        self.start_button.grid(row=0, column=0, sticky="w", padx=5, pady=5)

        self.stop_button = ttk.Button(self, text="Stop Live", command=self._stop, state=tk.DISABLED)
        self.stop_button.grid(row=0, column=1, sticky="w", padx=5, pady=5)

        # spacer
        spacer = ttk.Frame(self)
        spacer.grid(row=0, column=3, sticky="ew")

        ttk.Label(self, text="Speed:").grid(row=0, column=4, sticky="e", padx=(10, 2), pady=5)
        self.multiplier_combo = ttk.Combobox(
            self,
            textvariable=self.time_multiplier_var,
            values=["1x", "2x", "4x", "10x", "20x"],
            state="readonly",
            width=4,
        )
        self.multiplier_combo.grid(row=0, column=5, sticky="w", padx=(0, 5), pady=5)
        self.multiplier_combo.bind("<<ComboboxSelected>>", getattr(main_view, "_on_time_multiplier_changed", lambda e=None: None))

        ttk.Label(self, text="Update Time (s):").grid(row=0, column=6, sticky="e", padx=(10, 2), pady=5)
        self.update_time_entry = ttk.Entry(self, textvariable=self.update_time, width=5)
        self.update_time_entry.grid(row=0, column=7, sticky="w", padx=(0, 5), pady=5)

        self.reset_button = ttk.Button(self, text="Reset State", command=getattr(main_view, "_on_reset_simulation", lambda: None))
        self.reset_button.grid(row=0, column=8, sticky="e", padx=5, pady=5)

        self.reset_radar_button = ttk.Button(self, text="Reset Radar", command=getattr(main_view, "_reset_radar_state", lambda: None))
        self.reset_radar_button.grid(row=0, column=9, sticky="e", padx=5, pady=5)

        # Progress slider row
        progress_frame = ttk.Frame(self)
        progress_frame.grid(row=1, column=0, columnspan=10, sticky="ew", padx=5, pady=(6, 2))
        progress_frame.grid_columnconfigure(0, weight=1)
        progress_frame.grid_columnconfigure(1, weight=0)

        self.sim_slider = ttk.Scale(
            progress_frame,
            orient=tk.HORIZONTAL,
            variable=self.sim_slider_var,
            from_=0.0,
            to=1.0,
            command=lambda v: None,
        )
        self.sim_slider.grid(row=0, column=0, sticky="ew", padx=(4, 8))

        # Bind press/release to support seeking (use main_view handler)
        try:
            self.sim_slider.bind("<ButtonPress-1>", lambda e: setattr(main_view, "_slider_is_dragging", True))
            self.sim_slider.bind(
                "<ButtonRelease-1>",
                lambda e: (
                    setattr(main_view, "_slider_is_dragging", False),
                    getattr(main_view, "_on_seek", lambda: None)(),
                ),
            )
        except Exception:
            pass

        labels_frame = ttk.Frame(progress_frame)
        labels_frame.grid(row=0, column=1, sticky="e", padx=(4, 4))

        self.sim_elapsed_label = ttk.Label(labels_frame, text="0.0s", width=8, anchor=tk.E)
        self.sim_elapsed_label.grid(row=0, column=0)

        slash_label = ttk.Label(labels_frame, text="/")
        slash_label.grid(row=0, column=1, padx=(2, 2))

        self.sim_total_label = ttk.Label(labels_frame, text="0.0s", width=8, anchor=tk.W)
        self.sim_total_label.grid(row=0, column=2)

    # Button handlers that delegate to main_view methods
    def _start(self):
        try:
            if hasattr(self.main_view, "_on_start_simulation"):
                self.main_view._on_start_simulation()
        except Exception:
            raise

    def _stop(self):
        try:
            if hasattr(self.main_view, "_on_stop_simulation"):
                self.main_view._on_stop_simulation()
        except Exception:
            raise