#!/bin/sh
# Monitorink — boucle d'affichage e-ink sur Kobo Libra 2.
#
# Overlay sur https://github.com/usetrmnl/trmnl-kobo : réutilise ses binaires ARM
# (bin/fbink, bin/busybox_kobo) et ses helpers WiFi (scripts/*.sh). On remplace l'appel
# API TRMNL par un simple fetch de notre image de dashboard.
# Lancé par monitorink.sh (via NickelMenu). Logs -> ../monitorink.log

BASE="$(dirname "$0")"
cd "$BASE" || exit 1

IMAGE_URL="${MONITORINK_URL:-https://monitorink.homelab.nestor-server.fr/image.png}"
REFRESH="${MONITORINK_REFRESH:-600}"
TMP="/tmp/monitorink.png"

FBINK="./bin/fbink/fbink"
BUSYBOX="./bin/busybox_kobo"

log() { echo "[$(date '+%H:%M:%S')] $*"; sync; }

fetch() {
    # busybox wget (toujours présent), fallback curl si dispo dans le PATH.
    "$BUSYBOX" wget -q -T 30 -O "$TMP" "$IMAGE_URL" 2>/dev/null && return 0
    command -v curl >/dev/null 2>&1 && curl -fsSL -m 30 -o "$TMP" "$IMAGE_URL" 2>/dev/null && return 0
    return 1
}

# Ferme les FD hérités pour ne pas bloquer l'éjection USB.
exec 3>&- 2>/dev/null

log "boucle démarrée — BASE=$BASE URL=$IMAGE_URL refresh=${REFRESH}s"
log "fbink présent: $([ -x "$FBINK" ] && echo oui || echo NON) ; busybox: $([ -x "$BUSYBOX" ] && echo oui || echo NON)"

display() {
    "$FBINK" -g file="$TMP",valign=CENTER,halign=CENTER -c -f
    log "fbink rc=$?"
}

suspend_for() {
    # Séquence Kobo éprouvée (trmnl-kobo) : state-extended=1 AVANT rtcwake, puis
    # suspend manuel (echo mem) si rtcwake n'a pas vraiment suspendu.
    secs="$1"
    sync
    echo 1 > /sys/power/state-extended 2>/dev/null
    start=$(date +%s)
    "$BUSYBOX" rtcwake -a -s "$secs" -m mem 2>/dev/null
    elapsed=$(( $(date +%s) - start ))
    log "rtcwake elapsed=${elapsed}s"
    if [ "$elapsed" -le 10 ]; then
        log "suspend manuel via echo mem"
        sleep 1; sync; sleep 2
        m_start=$(date +%s)
        echo mem > /sys/power/state 2>/dev/null
        log "echo mem elapsed=$(( $(date +%s) - m_start ))s (≈${secs}=OK, ≈0=Nickel bloque)"
    fi
    echo 0 > /sys/power/state-extended 2>/dev/null
}

while true; do
    log "--- itération ---"
    ./scripts/ledToggle.sh on 2>/dev/null

    log "wifi: enable"
    ./scripts/enable-wifi.sh >/dev/null 2>&1
    ./scripts/force-wifi-connection.sh >/dev/null 2>&1
    ./scripts/obtain-ip.sh >/dev/null 2>&1
    log "ip: $(ip addr show 2>/dev/null | grep -o 'inet [0-9.]*' | grep -v '127.0' | head -1)"

    if fetch; then
        log "fetch OK ($(wc -c < "$TMP" 2>/dev/null) octets)"
        display
    else
        log "fetch ECHEC"
        "$FBINK" -pmh "Monitorink : image indisponible ($(date '+%H:%M'))"
    fi

    ./scripts/release-ip.sh >/dev/null 2>&1
    ./scripts/disable-wifi.sh >/dev/null 2>&1
    ./scripts/ledToggle.sh off 2>/dev/null

    log "suspend ${REFRESH}s"
    suspend_for "$REFRESH"
done