#!/bin/sh
# MudiModem installer — run ON the GL-E5800 ("Mudi"). Self-contained: fetches
# every source file from GitHub and installs it, gzipping the view chunks on the
# box (busybox gzip). No toolchain, no committed artifacts. Idempotent.
# Run it from a root shell on the router (ssh root@<router> first if remote):
#
#   curl -fsSL https://raw.githubusercontent.com/kevinherzig/MudiModem/main/install.sh | sh
#
# Env: MUDIMODEM_REF (branch/tag, default main), MUDIMODEM_BASE (override raw URL).
set -eu

REF="${MUDIMODEM_REF:-main}"
BASE="${MUDIMODEM_BASE:-https://raw.githubusercontent.com/kevinherzig/MudiModem/$REF}"

# Model guard: on some LANs 192.168.8.1 is a DIFFERENT GL router (AXT1800). Never
# write to anything that isn't a Mudi.
MODEL=$(cat /proc/device-tree/model 2>/dev/null | tr -d '\0')
case "$MODEL" in
  *E5800*) echo "target OK: $MODEL" ;;
  *) echo "REFUSING: this is not a GL-E5800 (got: '${MODEL:-unknown}')" >&2; exit 1 ;;
esac

fetch() { curl -fsSL "$BASE/$1"; }   # curl -f => nonzero on HTTP error => set -e aborts

# Fetch a source file to a temp path first, so a mid-stream curl failure can't
# leave a truncated file in place (POSIX sh has no pipefail).
grab() { tmp=$(mktemp); fetch "$1" > "$tmp" || { echo "fetch failed: $1" >&2; rm -f "$tmp"; exit 1; }; }

gz_install()  { grab "$1"; gzip -9 -c "$tmp" > "$2"; rm -f "$tmp"; echo "  $2"; }         # $1 src, $2 .gz target
cp_install()  { grab "$1"; cat "$tmp" > "$2"; chmod "$3" "$2"; rm -f "$tmp"; echo "  $2"; } # $1 src, $2 target, $3 mode

mkdir -p /www/views /www/mudimodem /usr/lib/mudimodem /usr/share/oui/menu.d \
         /usr/share/gl-validator.d /usr/lib/oui-httpd/rpc /usr/sbin /usr/bin \
         /etc/init.d /etc/mudimodem /etc/hotplug.d/i2c

echo "installing view chunks + menu + library:"
gz_install src/views/mudimodem.js          /www/views/gl-sdk4-ui-mudimodem.common.js.gz
gz_install src/views/mudimodem-tracking.js /www/views/gl-sdk4-ui-mudimodem-tracking.common.js.gz
gz_install src/views/mudimodem-console.js  /www/views/gl-sdk4-ui-mudimodem-console.common.js.gz
gz_install src/views/mudimodem-speedtest.js /www/views/gl-sdk4-ui-mudimodem-speedtest.common.js.gz
# Battery tab is an in-page lazy chunk (no menu JSON) — same pattern as Tracking.
gz_install src/views/mudimodem-battery.js  /www/views/gl-sdk4-ui-mudimodem-battery.common.js.gz
gz_install src/at-library.snapshot.json    /www/mudimodem/at-library.json.gz
cp_install src/menu/mudimodem.json          /usr/share/oui/menu.d/mudimodem.json          0644
cp_install src/menu/mudimodem-tracking.json /usr/share/oui/menu.d/mudimodem-tracking.json 0644
cp_install src/menu/mudimodem-speedtest.json /usr/share/oui/menu.d/mudimodem-speedtest.json 0644
cp_install version.json                     /etc/mudimodem/version.json                   0644

echo "installing AT channel + library tool:"
cp_install tools/mudimodem-at.py /usr/lib/mudimodem/mudimodem-at.py 0644
cp_install tools/mudimodem-lib   /usr/lib/mudimodem/mudimodem-lib   0755

echo "installing speedtest runner + scheduler:"
cp_install tools/mudimodem-speedtest.py      /usr/lib/mudimodem/mudimodem-speedtest.py 0755
cp_install src/sbin/mudimodem-speedtestd     /usr/sbin/mudimodem-speedtestd           0755
cp_install src/etc/init.d/mudimodem-speedtestd /etc/init.d/mudimodem-speedtestd       0755
# Scheduler is off-by-default in its config; enable the service so a user who
# turns scheduling on later doesn't need a separate enable step (matches deploy).
/etc/init.d/mudimodem-speedtestd enable  2>/dev/null || true
/etc/init.d/mudimodem-speedtestd restart 2>/dev/null || true
echo "  speedtest installed + scheduler (re)started"

echo "installing watchdog + validator + backend:"
# Watchdog + validator BEFORE the backend: set_bands needs the watchdog present,
# and the validator must exist before nginx reloads the plugin (§8).
cp_install src/sbin/mudimodem-revert  /usr/sbin/mudimodem-revert            0755
cp_install src/sbin/mudimodem-selfupdate /usr/sbin/mudimodem-selfupdate     0755
cp_install src/validator/mudimodem.lua /usr/share/gl-validator.d/mudimodem.lua 0644
cp_install src/rpc/mudimodem          /usr/lib/oui-httpd/rpc/mudimodem       0644
# RESTART not reload: nginx caches the plugin per worker; reload leaves stale
# workers serving -32601 for the new methods (§8). ~1s admin blip, no link touch.
/etc/init.d/nginx restart 2>/dev/null || true
echo "  nginx restarted"

echo "installing history collector service:"
cp_install src/sbin/mudimodem-collectd        /usr/sbin/mudimodem-collectd    0755
cp_install src/etc/init.d/mudimodem-collectd  /etc/init.d/mudimodem-collectd  0755
/etc/init.d/mudimodem-collectd enable  2>/dev/null || true
/etc/init.d/mudimodem-collectd restart 2>/dev/null || true
echo "  collector enabled + started"

echo "installing battery charge limit:"
# Off first if a previous install's watcher is active — replacing the binary
# under a running watcher is racy.
if [ -x /usr/bin/glbattlimit ]; then
  /usr/bin/glbattlimit off 2>/dev/null || true
fi
cp_install src/sbin/glbattlimit           /usr/bin/glbattlimit                 0755
cp_install src/hotplug/20-glbattlimit     /etc/hotplug.d/i2c/20-glbattlimit    0755
cp_install src/etc/init.d/glbattlimit     /etc/init.d/glbattlimit              0755
# Default policy only if absent — never clobber user settings on upgrade.
if [ ! -f /etc/mudimodem/battlimit.json ]; then
  echo '{"enabled":false,"limit_gui":80}' > /etc/mudimodem/battlimit.json
  chmod 0644 /etc/mudimodem/battlimit.json
  echo "  /etc/mudimodem/battlimit.json (default disabled)"
fi
# History eMMC backup policy — off by default; never clobber user choice.
if [ ! -f /etc/mudimodem/history.json ]; then
  echo '{"enabled":false}' > /etc/mudimodem/history.json
  chmod 0644 /etc/mudimodem/history.json
  echo "  /etc/mudimodem/history.json (default disabled)"
fi
/etc/init.d/glbattlimit enable 2>/dev/null || true
# Do NOT start a limit on install (default disabled; start would no-op anyway).
echo "  battery charge limit stack installed"

lcd_geom=$(cat /sys/class/graphics/fb0/virtual_size 2>/dev/null || echo "?")
if [ "$lcd_geom" = "240,320" ]; then
  echo "installing LCD front-panel renderer (MudiUI):"
  cp_install src/lcd/mudi.py         /usr/bin/mudi.py         0755
  cp_install src/lcd/mudi-watch.py   /usr/bin/mudi-watch.py   0755
  cp_install src/lcd/mudi.init       /etc/init.d/mudi         0755
  cp_install src/lcd/mudi-watch.init /etc/init.d/mudi-watch   0755
  # default settings only if absent — never clobber user LCD config on upgrade
  if [ ! -f /etc/config/mudi ]; then
    cp_install src/lcd/mudi.config   /etc/config/mudi         0644
  fi
  # renderer python deps: install only what's missing; pillow --nodeps avoids the
  # libfreetype clash with gl-sdk4-screen-large. Offline-tolerant.
  # ⚠️ Because pillow is --nodeps, its shared-lib deps are NOT pulled automatically.
  # libtiff6 is required by PIL/_imaging.so — without it mudi.py crash-loops
  # (issue #3: "No module named luma" was an older stack; current fail is libtiff).
  LCD_DEPS="python3-light python3-numpy python3-urllib python3-logging python3-ctypes python3-cffi python3-evdev libtiff6"
  lcd_missing=""
  for p in $LCD_DEPS; do
    opkg list-installed 2>/dev/null | grep -q "^$p " || lcd_missing="$lcd_missing $p"
  done
  opkg list-installed 2>/dev/null | grep -q "^python3-pillow " || lcd_missing="$lcd_missing python3-pillow"
  if [ -n "$lcd_missing" ]; then
    opkg update 2>/dev/null || true
    for p in $lcd_missing; do
      if [ "$p" = python3-pillow ]; then
        opkg install --nodeps python3-pillow || true
      else
        opkg install "$p" || true
      fi
    done
  fi
  # DEFAULT OFF: the renderer seizes /dev/fb0 from gl_screen. It is enabled only
  # from the admin "LCD Display" tab — do NOT enable or start it here.
  echo "  LCD renderer installed (disabled by default — enable from the LCD Display tab)"
else
  echo "  no 240x320 front panel — skipping LCD renderer install"
fi

# Survive a firmware upgrade (our files live outside /etc/config). Idempotent.
echo "registering files in /etc/sysupgrade.conf:"
f=/etc/sysupgrade.conf; touch "$f"
for p in \
  /www/views/gl-sdk4-ui-mudimodem.common.js.gz \
  /www/views/gl-sdk4-ui-mudimodem-tracking.common.js.gz \
  /www/views/gl-sdk4-ui-mudimodem-console.common.js.gz \
  /www/views/gl-sdk4-ui-mudimodem-speedtest.common.js.gz \
  /www/views/gl-sdk4-ui-mudimodem-battery.common.js.gz \
  /www/mudimodem/at-library.json.gz \
  /usr/share/oui/menu.d/mudimodem.json \
  /usr/share/oui/menu.d/mudimodem-tracking.json \
  /usr/share/oui/menu.d/mudimodem-speedtest.json \
  /usr/lib/mudimodem/mudimodem-at.py \
  /usr/lib/mudimodem/mudimodem-lib \
  /usr/lib/mudimodem/mudimodem-speedtest.py \
  /usr/sbin/mudimodem-speedtestd \
  /etc/init.d/mudimodem-speedtestd \
  /usr/sbin/mudimodem-revert \
  /usr/sbin/mudimodem-selfupdate \
  /usr/share/gl-validator.d/mudimodem.lua \
  /usr/lib/oui-httpd/rpc/mudimodem \
  /usr/sbin/mudimodem-collectd \
  /etc/init.d/mudimodem-collectd \
  /etc/mudimodem/version.json \
  /usr/bin/glbattlimit \
  /etc/hotplug.d/i2c/20-glbattlimit \
  /etc/init.d/glbattlimit \
  /etc/mudimodem/battlimit.json \
  /etc/mudimodem/history.json \
  /etc/mudimodem/history \
  /usr/bin/mudi.py \
  /usr/bin/mudi-watch.py \
  /etc/init.d/mudi \
  /etc/init.d/mudi-watch \
; do grep -qxF "$p" "$f" || echo "$p" >> "$f"; done
echo "  done"

echo ""
echo "MudiModem installed. Reload the GL admin in your browser — a MODEM item"
echo "appears in the top navigation. No reboot needed."