#!/usr/bin/env bash
set -euo pipefail
# POS: network hotspot — Wi-Fi hotspot via create_ap + wihotspot-gui
# POS_FLAGS: --foreground

LOGFILE=/var/log/linux_post_install_hotspot.log

usage() {
    cat <<EOF
Usage: pos network hotspot [command] [args]

Manage Wi-Fi hotspots with create_ap (CLI) or wihotspot-gui (GUI).
These tools are precompiled and shipped in x64_bin/ (or arm64_bin/),
installed to /usr/local/bin/ by install.sh.

Commands:
  (no args)                 Launch the wihotspot-gui
  start [--foreground] <wifi-iface> [<internet-iface>] <ssid> [<passphrase>]
                            Create an access point; asks whether to run in the
                            background. Use --foreground to skip the prompt
                            and block until Ctrl+C.
  stop [<id>]               Stop the running access point. <id> is an interface
                            name or PID; if omitted it is detected automatically.
  status                    List running access points

Examples:
  pos network hotspot
  pos network hotspot start wlan0 eth0 MyNet mypass
  pos network hotspot start --foreground wlan0 eth0 MyNet mypass
  pos network hotspot stop
  pos network hotspot status

Background logs: $LOGFILE
EOF
    exit 0
}

cmd="${1:-}"

case "$cmd" in
    -h|--help) usage ;;
    "")        exec wihotspot-gui ;;
    start)
        shift
        fg=0
        bg=0
        if [ "${1:-}" = "--foreground" ]; then
            fg=1
            shift
        fi
        [ $# -ge 2 ] || usage
        if [ $fg -eq 0 ]; then
            read -rp "Run in background? [y/N]: " bg
            case "$bg" in
                [yY]*) bg=1 ;;
                *)     bg=0 ;;
            esac
        fi
        if [ $bg -eq 1 ]; then
            sudo create_ap --daemon --logfile "$LOGFILE" "$@"
            echo "[+] Hotspot started in background"
            echo "    Log   : $LOGFILE"
            echo "    Status: pos network hotspot status"
            echo "    Stop  : pos network hotspot stop"
        else
            exec sudo create_ap "$@"
        fi
        ;;
    stop)
        shift
        id="${1:-}"
        if [ -z "$id" ]; then
            ids=$(sudo create_ap --list-running | awk 'NF { print $2 }')
            if [ -z "$ids" ]; then
                echo "No hotspot running."
                exit 0
            fi
            for id in $ids; do
                sudo create_ap --stop "$id"
            done
        else
            sudo create_ap --stop "$id"
        fi
        ;;
    status)
        exec sudo create_ap --list-running
        ;;
    *)
        echo "ERROR: Unknown hotspot command '$cmd'"
        echo "Run 'pos network hotspot --help' for usage."
        exit 1
        ;;
esac