"""USB identities for the fleet vs the (future) speaker Rally."""
from __future__ import annotations

from pathlib import Path

LOGITECH_VID = 0x046D
# HD Pro C920 (this fleet) and the older 082d id.
C920_PIDS = frozenset({0x08E5, 0x082D})
# Logi Rally Camera 0881; Rally Bar / Mini / Huddle variants.
RALLY_PIDS = frozenset({0x0881, 0x087C, 0x089B, 0x08D3})
RALLY_IDENTITY = "rally"
# Huddly IQ on the PCH/Dante hub — not a cam-NN slot.
HUDDLY_VID = 0x2BD9
HUDDLY_PIDS = frozenset({0x0021})


def usb_vid_pid_from_sysfs(sysfs_device: str) -> tuple[int, int] | None:
    p = Path(sysfs_device)
    for _ in range(12):
        vend = p / "idVendor"
        prod = p / "idProduct"
        if vend.is_file() and prod.is_file():
            try:
                return int(vend.read_text().strip(), 16), int(prod.read_text().strip(), 16)
            except ValueError:
                return None
        if str(p).startswith("/sys/devices"):
            p = p.parent
        else:
            return None
    return None


def usb_vid_pid_of_video_node(video_node: str) -> tuple[int, int] | None:
    link = Path(f"/sys/class/video4linux/{Path(video_node).name}/device")
    try:
        real = str(link.resolve())
    except OSError:
        return None
    return usb_vid_pid_from_sysfs(real)


def is_c920_pid(pid: int) -> bool:
    return int(pid) in C920_PIDS


def is_huddly_iq(vid: int, pid: int) -> bool:
    return int(vid) == HUDDLY_VID and int(pid) in HUDDLY_PIDS


def is_fleet_video(vid: int, pid: int) -> bool:
    """True only for the 20 C920s. Rally, Huddly IQ, etc. stay out of cam-NN."""
    return int(vid) == LOGITECH_VID and int(pid) in C920_PIDS


def is_rally_pid(pid: int) -> bool:
    return int(pid) in RALLY_PIDS


def looks_like_rally_name(name: str) -> bool:
    n = (name or "").lower()
    return "rally" in n