#!/usr/bin/env bash
set -euo pipefail
# POS: share usb-server — USB Redirector server control (--ls, --share; prompts when args omitted)
# POS_FLAGS: --ls --ls-shared --share --unshare --auto-share --callback --close-callback --auto-connect --disconnect --nickname --timeout --port --info --version
source "$(dirname "$0")/../lib/common.sh" 2>/dev/null || source "$(dirname "$0")/common.sh"

usage() {
    cat <<EOF
Usage: pos share usb server [flag] [args]

Control the USB Redirector server (usbsrv) — share local USB devices
over the network and manage connected clients.

Flags:
  --ls                          List host USB devices and connected clients
  --ls-shared                   List shared or in-use devices only
  --share [dev-id] [client-id]  Share a device and connect it to a client
                                (interactive picker when IDs are omitted)
  --unshare [dev-id]            Stop sharing a device
  --auto-share on|off           Toggle automatic sharing of new devices
  --callback [addr:port]        Create a callback connection to a client
  --close-callback [target|all] Close a client callback
  --auto-connect on|off [client]  Toggle remote auto-connect for a client
  --disconnect [dev-id|all]     Disconnect a device from its clients
  --nickname [dev-id] [nick]    Set a device nickname (empty nick removes it)
  --timeout [dev-id] [sec]      Set device inactivity timeout (0 disables)
  --port [num]                  Set the TCP port (restart server to apply)
  --info                        Show server info
  --version                     Show server version
  -h, --help                    Show this help

Examples:
  pos share usb server --ls
  pos share usb server --share
  pos share usb server --share 0-1 3
  pos share usb server --auto-share on
  pos share usb server --port 32032
EOF
    exit 0
}

cmd_ls() {
    echo "==== HOST USB DEVICES ===="
    usbsrv -list-devices
    echo
    echo "==== CONNECTED CLIENTS ===="
    usbsrv -list-clients
}

cmd_ls_shared() {
    echo "==== SHARED OR IN USE DEVICES ===="
    usbsrv -list-devices | awk '
      BEGIN {RS=""; FS="\n"}
      {
        for(i=1; i<=NF; i++) {
          if ($i ~ /Status:.*(shared|in use)/) {
            print $0 "\n"
            break
          }
        }
      }
    ' || true
}

cmd_share() {
    local dev="${1:-}" client="${2:-}"
    if [ -z "$dev" ]; then
        echo "==== HOST USB DEVICES ===="
        usbsrv -list-devices
        echo
        echo "==== CONNECTED CLIENTS ===="
        usbsrv -list-clients
        echo
        read -rp "Enter device ID to share: " dev
        read -rp "Enter client ID to connect to: " client
    fi
    [ -n "$dev" ] || err "no device ID given"
    [ -n "$client" ] || err "no client ID given"
    log "Sharing device ID $dev..."
    usbsrv -share "$dev"
    log "Connecting device $dev to client $client..."
    usbsrv -connect-to "${client}-${dev}"
}

cmd_unshare() {
    local dev="${1:-}"
    if [ -z "$dev" ]; then
        cmd_ls_shared
        read -rp "Enter device ID to unshare: " dev
    fi
    [ -n "$dev" ] || err "no device ID given"
    log "Unsharing device ID $dev..."
    usbsrv -unshare "$dev"
}

cmd_auto_share() {
    local mode="${1:-}"
    if [ -z "$mode" ]; then
        read -rp "Turn auto-share on or off? (on/off): " mode
    fi
    case "$mode" in
        on|off) ;;
        *) err "Invalid option '$mode' — must be 'on' or 'off'" ;;
    esac
    usbsrv -auto-share "$mode"
    log "Auto-share set to $mode"
}

cmd_callback() {
    local addr="${1:-}"
    if [ -z "$addr" ]; then
        read -rp "Enter client address:port for callback (e.g. 192.168.1.100:32032): " addr
    fi
    [ -n "$addr" ] || err "no address given"
    usbsrv -create-callback "$addr"
}

cmd_close_callback() {
    local target="${1:-}"
    if [ -z "$target" ]; then
        usbsrv -list-clients
        read -rp "Enter client or clientid or 'all' to close callback: " target
    fi
    [ -n "$target" ] || err "no target given"
    usbsrv -close-callback "$target"
}

cmd_auto_connect() {
    local mode="${1:-}" client="${2:-}"
    if [ -z "$mode" ]; then
        read -rp "Enable or disable remote auto-connect? (on/off): " mode
    fi
    case "$mode" in
        on|off) ;;
        *) err "Invalid option '$mode' — must be 'on' or 'off'" ;;
    esac
    if [ -z "$client" ]; then
        usbsrv -list-clients
        read -rp "Enter client or clientid: " client
    fi
    [ -n "$client" ] || err "no client given"
    usbsrv -remote-auto-connect "$mode" "$client"
}

cmd_disconnect() {
    local dev="${1:-}"
    if [ -z "$dev" ]; then
        cmd_ls_shared
        read -rp "Enter device ID or 'all' to disconnect from clients: " dev
    fi
    [ -n "$dev" ] || err "no device ID given"
    usbsrv -disconnect-from "$dev"
}

cmd_nickname() {
    local dev="${1:-}" nick="${2:-}"
    if [ -z "$dev" ]; then
        usbsrv -list-devices
        read -rp "Enter device ID to set nickname (empty to remove): " dev
        read -rp "Enter nickname (or leave empty to remove): " nick
    fi
    [ -n "$dev" ] || err "no device ID given"
    usbsrv -set-nickname "$nick" "$dev"
}

cmd_timeout() {
    local dev="${1:-}" sec="${2:-}"
    if [ -z "$dev" ]; then
        usbsrv -list-devices
        read -rp "Enter device ID to set timeout for: " dev
        read -rp "Enter timeout in seconds (0 to disable): " sec
    fi
    [ -n "$dev" ] || err "no device ID given"
    [[ "$sec" =~ ^[0-9]+$ ]] || err "Invalid timeout '$sec' — must be a number"
    usbsrv -set-timeout "$sec" "$dev"
}

cmd_port() {
    local port="${1:-}"
    if [ -z "$port" ]; then
        read -rp "Enter new TCP port: " port
    fi
    [[ "$port" =~ ^[0-9]+$ ]] || err "Invalid port number '$port'"
    usbsrv -set-tcp-port "$port"
    warn "Restart your server for port changes to take effect."
}

command -v usbsrv &>/dev/null \
    || err "usbsrv not found — install the USB Redirector server (https://www.incentivespro.com/usb-server.html)"

cmd="${1:-}"

case "$cmd" in
    -h|--help|"") usage ;;
esac

case "$cmd" in
    --ls|--ls-shared|--share|--unshare|--auto-share|--callback|--close-callback|--auto-connect|--disconnect|--nickname|--timeout|--port|--info|--version) ;;
    *) err "Unknown flag '$cmd'" ;;
esac

case "$cmd" in
    --ls)           cmd_ls ;;
    --ls-shared)    cmd_ls_shared ;;
    --share)        shift; cmd_share "$@" ;;
    --unshare)      shift; cmd_unshare "$@" ;;
    --auto-share)   shift; cmd_auto_share "$@" ;;
    --callback)     shift; cmd_callback "$@" ;;
    --close-callback) shift; cmd_close_callback "$@" ;;
    --auto-connect) shift; cmd_auto_connect "$@" ;;
    --disconnect)   shift; cmd_disconnect "$@" ;;
    --nickname)     shift; cmd_nickname "$@" ;;
    --timeout)      shift; cmd_timeout "$@" ;;
    --port)         shift; cmd_port "$@" ;;
    --info)         usbsrv -info ;;
    --version)      usbsrv -version ;;
    *)              err "Unknown flag '$cmd'"; usage ;;
esac