#!/usr/bin/env bash
# Install rtsp-streamer as a boot-to-wall kiosk. Run as root on the target
# (Raspberry Pi 4 or any Linux with sway + mpv).
#
#   sudo ./deploy/install.sh [kiosk-user]
#
# Steps performed:
#   * install the rtsp-streamer binary to /usr/local/bin
#   * install the kiosk sway config to /etc/rtsp-streamer/sway/config
#   * create the kiosk user (if missing) and add it to the video/render/input seats
#   * enable tty1 autologin for that user
#   * append the sway launcher to the user's ~/.bash_profile
#
# It does NOT install sway/mpv — do that with your distro's package manager:
#   Debian/RPi OS:  apt install sway mpv foot
#   Arch:           pacman -S sway mpv foot
set -euo pipefail

KIOSK_USER="${1:-kiosk}"
REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
BIN_SRC="${REPO_DIR}/bin/rtsp-streamer"
# The configurator is a separate, optional binary (built with Bun; see
# tui/README.md). Accept either the host build or the arm64 cross-build.
TUI_SRC="${REPO_DIR}/bin/rtsp-streamer-tui"
[ -x "$TUI_SRC" ] || TUI_SRC="${REPO_DIR}/bin/rtsp-streamer-tui-arm64"

if [ "$(id -u)" -ne 0 ]; then
    echo "error: run as root (sudo)" >&2
    exit 1
fi

if [ ! -x "$BIN_SRC" ]; then
    echo "error: ${BIN_SRC} not found. Build it first: make build (native) or make pi (arm64)." >&2
    exit 1
fi

echo ">> installing binary to /usr/local/bin/rtsp-streamer"
install -m 0755 "$BIN_SRC" /usr/local/bin/rtsp-streamer

# Installed under the un-suffixed name, which is what `rtsp-streamer tui` looks
# for next to itself.
if [ -x "$TUI_SRC" ]; then
    echo ">> installing configurator to /usr/local/bin/rtsp-streamer-tui"
    install -m 0755 "$TUI_SRC" /usr/local/bin/rtsp-streamer-tui
else
    echo ">> no configurator binary found (build it with 'make tui'); "
    echo "   'rtsp-streamer tui --legacy' will still work."
fi

echo ">> installing sway kiosk config to /etc/rtsp-streamer/sway/config"
install -d /etc/rtsp-streamer/sway
install -m 0644 "${REPO_DIR}/deploy/sway/config" /etc/rtsp-streamer/sway/config

if ! id "$KIOSK_USER" >/dev/null 2>&1; then
    echo ">> creating user ${KIOSK_USER}"
    useradd --create-home --shell /bin/bash "$KIOSK_USER"
fi
echo ">> adding ${KIOSK_USER} to video/render/input groups"
for grp in video render input seat; do
    getent group "$grp" >/dev/null 2>&1 && usermod -aG "$grp" "$KIOSK_USER" || true
done

echo ">> enabling tty1 autologin for ${KIOSK_USER}"
install -d /etc/systemd/system/getty@tty1.service.d
sed "s/kiosk/${KIOSK_USER}/" "${REPO_DIR}/deploy/systemd/getty@tty1.service.d/autologin.conf" \
    > /etc/systemd/system/getty@tty1.service.d/autologin.conf
systemctl daemon-reload

HOME_DIR="$(getent passwd "$KIOSK_USER" | cut -d: -f6)"
PROFILE="${HOME_DIR}/.bash_profile"
MARKER="# >>> rtsp-streamer kiosk launcher >>>"
if ! grep -qF "$MARKER" "$PROFILE" 2>/dev/null; then
    echo ">> appending sway launcher to ${PROFILE}"
    {
        echo ""
        echo "$MARKER"
        cat "${REPO_DIR}/deploy/profile-snippet.sh"
        echo "# <<< rtsp-streamer kiosk launcher <<<"
    } >> "$PROFILE"
    chown "$KIOSK_USER": "$PROFILE"
else
    echo ">> launcher already present in ${PROFILE}, leaving it"
fi

cat <<EOF

Done. Next steps:
  1. Put a config at ${HOME_DIR}/.config/rtsp-streamer/config.yaml
     (as ${KIOSK_USER}:  rtsp-streamer config init  then edit it, or run
      rtsp-streamer tui  — add --legacy if the configurator wasn't installed).
  2. Export the controller password for the daemon. Easiest: create
     ${HOME_DIR}/.config/rtsp-streamer/env with  RTSP_STREAMER_PASSWORD=...
     and source it from ~/.bash_profile before sway starts.
  3. Discover cameras:  sudo -u ${KIOSK_USER} rtsp-streamer discover
  4. Reboot, or switch to tty1, to bring up the wall.

Make sure 'sway' and 'mpv' are installed. Verify a stream first with:
  mpv --rtsp-transport=tcp 'rtsps://HOST:7441/ALIAS?enableSrtp'
EOF