#!/bin/bash
# KVM Switch: Nobara → Mac
# Switches monitor to USB-C and peripherals to Host 3 (Mac)
#
# Host mapping (0-indexed in HID++):
#   Host 1 (0x01): Nobara (xtrm-pc)
#   Host 3 (0x02): Mac (Kaloyan's MacBook Air)
#
# HID++ command format: ReportID, DeviceIdx, FeatureIdx, Function, HostIdx, 0, 0
#   Mouse:    device 0x03, feature 0x0E (CHANGE_HOST)
#   Keyboard: device 0x02, feature 0x0A (CHANGE_HOST)
#   Function 0x10 = setCurrentHost (function 0 << 4)

HIDAPITESTER="$HOME/bin/hidapitester"

echo "Switching to Mac..."

# 1. Switch Mouse (MX Master 4) to Host 3 (Mac)
echo "  Mouse -> Mac..."
"$HIDAPITESTER" --vidpid 046d/c548 --usage 0x0001 --usagePage 0xff00 \
    --open --length 7 --send-output 0x10,0x03,0x0E,0x10,0x02,0x00,0x00 2>/dev/null || \
    echo "  [WARN] Mouse switch failed"

# 2. Switch Keyboard (MX Keys S) to Host 3 (Mac)
echo "  Keyboard -> Mac..."
"$HIDAPITESTER" --vidpid 046d/c548 --usage 0x0001 --usagePage 0xff00 \
    --open --length 7 --send-output 0x10,0x02,0x0A,0x10,0x02,0x00,0x00 2>/dev/null || \
    echo "  [WARN] Keyboard switch failed"

# 3. Switch Monitor to USB-C (Dell U3821DW input code: 27)
echo "  Monitor -> USB-C..."
if command -v ddcutil &>/dev/null; then
    ddcutil setvcp 60 27 2>/dev/null || \
        echo "  [WARN] Monitor switch failed (DDC/CI disabled or permissions issue)"
else
    echo "  [WARN] ddcutil not installed"
fi

echo "Done!"