#!/usr/bin/env python3
"""Interactive menu for PH18 HID RGB controls."""

from __future__ import annotations

import re
import subprocess
import sys
from pathlib import Path

HEX_COLOR_RE = re.compile(r"^[0-9a-fA-F]{6}$")
CSV_COLOR_RE = re.compile(r"^\s*\d{1,3}\s*,\s*\d{1,3}\s*,\s*\d{1,3}\s*$")

SCRIPT_DIR = Path(__file__).resolve().parent
HID_RGB_SCRIPT = SCRIPT_DIR / "ph18_hid_rgb.py"


def prompt_menu_choice() -> str:
    """Prompt for the main menu action."""
    print("\nPH18 RGB Menu")
    print("1. List detected HID devices and mappings")
    print("2. Set keyboard single static color")
    print("3. Set keyboard 4-zone static colors")
    print("4. Switch keyboard to dynamic mode")
    print("5. Set rear/logo/bar static color")
    print("6. Turn rear/logo/bar off")
    print("7. Set rear/logo/bar progressbar effect")
    print("0. Exit")
    return input("Choose an option: ").strip()


def prompt_yes_no(question: str, *, default_yes: bool = True) -> bool:
    """Prompt for a yes/no answer."""
    suffix = " [Y/n]: " if default_yes else " [y/N]: "
    raw = input(question + suffix).strip().lower()
    if not raw:
        return default_yes
    return raw in {"y", "yes"}


def _valid_csv_color(value: str) -> bool:
    if not CSV_COLOR_RE.match(value):
        return False
    try:
        parts = [int(part.strip()) for part in value.split(",")]
    except ValueError:
        return False
    return len(parts) == 3 and all(0 <= part <= 255 for part in parts)


def prompt_color(question: str) -> str:
    """Prompt for a color in hex (RRGGBB) or CSV (R,G,B)."""
    while True:
        raw = input(f"{question} (RRGGBB or R,G,B): ").strip()
        if HEX_COLOR_RE.match(raw):
            return raw.lower()
        if _valid_csv_color(raw):
            return raw
        print("Invalid color format.")


def prompt_target() -> str:
    """Prompt for zone target."""
    options = {"1": "rear", "2": "logo", "3": "bar", "4": "all"}
    print("\nTarget:")
    print("1. rear")
    print("2. logo")
    print("3. bar")
    print("4. all")
    while True:
        choice = input("Choose target: ").strip()
        target = options.get(choice)
        if target:
            return target
        print("Invalid choice.")


def prompt_brightness() -> str:
    """Prompt for brightness byte."""
    while True:
        raw = input("Brightness [0-255] (default 25): ").strip()
        if not raw:
            return "25"
        try:
            value = int(raw, 10)
        except ValueError:
            print("Invalid number.")
            continue
        if 0 <= value <= 255:
            return str(value)
        print("Brightness must be 0..255.")


def run_hid_rgb(args: list[str]) -> int:
    """Run ph18_hid_rgb.py with provided arguments."""
    cmd = [sys.executable, str(HID_RGB_SCRIPT), *args]
    print(f"\n$ {' '.join(cmd)}")
    result = subprocess.run(cmd, check=False)
    if result.returncode != 0:
        print(f"Command failed with exit code {result.returncode}")
    return result.returncode


def action_keyboard_static() -> None:
    color = prompt_color("Keyboard color")
    args = ["keyboard", "--color", color]
    if not prompt_yes_no("Apply MagKey/WASD overlay color too?", default_yes=True):
        args.append("--no-magkeys")
    run_hid_rgb(args)


def action_keyboard_zones() -> None:
    z1 = prompt_color("Zone 1 color (left)")
    z2 = prompt_color("Zone 2 color")
    z3 = prompt_color("Zone 3 color")
    z4 = prompt_color("Zone 4 color (right)")
    args = ["keyboard-zones", "--z1", z1, "--z2", z2, "--z3", z3, "--z4", z4]
    if not prompt_yes_no("Apply MagKey/WASD overlay from zone1 color?", default_yes=True):
        args.append("--no-magkeys")
    run_hid_rgb(args)


def action_keyboard_dynamic() -> None:
    repeats = input("Dynamic repeats (default 2): ").strip() or "2"
    run_hid_rgb(["keyboard-dynamic", "--repeats", repeats])


def action_zone_static() -> None:
    target = prompt_target()
    color = prompt_color("Zone color")
    brightness = prompt_brightness()
    run_hid_rgb(["zone", target, "static", "--color", color, "--brightness", brightness])


def action_zone_off() -> None:
    target = prompt_target()
    run_hid_rgb(["zone", target, "off"])


def action_zone_progressbar() -> None:
    target = prompt_target()
    run_hid_rgb(["zone", target, "progressbar"])


def main() -> int:
    """Run the interactive RGB menu."""
    if not HID_RGB_SCRIPT.exists():
        print(f"Missing script: {HID_RGB_SCRIPT}")
        return 1

    if hasattr(sys, "getuid") and sys.getuid() != 0:
        print("Tip: run with sudo for write operations (e.g. `sudo python3 ph18_rgb_menu.py`).")

    actions = {
        "1": lambda: run_hid_rgb(["list"]),
        "2": action_keyboard_static,
        "3": action_keyboard_zones,
        "4": action_keyboard_dynamic,
        "5": action_zone_static,
        "6": action_zone_off,
        "7": action_zone_progressbar,
    }

    while True:
        choice = prompt_menu_choice()
        if choice == "0":
            print("Bye.")
            return 0
        action = actions.get(choice)
        if action is None:
            print("Invalid option.")
            continue
        action()


if __name__ == "__main__":
    raise SystemExit(main())