#!/bin/bash
# ============================================================================
# DarkForge Linux — System Initialization
# ============================================================================
# /etc/rc.d/rc.sysinit — runs once at boot before daemons start.
# Sets up: hostname, clock, filesystems, kernel modules, swap, sysctl.
# ============================================================================

. /etc/rc.conf

echo "DarkForge Linux — booting..."

# --- Mount virtual filesystems (if not already by kernel) -------------------
mountpoint -q /proc || mount -t proc proc /proc
mountpoint -q /sys  || mount -t sysfs sysfs /sys
mountpoint -q /run  || mount -t tmpfs tmpfs /run
mountpoint -q /dev  || mount -t devtmpfs devtmpfs /dev
mkdir -p /dev/pts /dev/shm /run/lock
mountpoint -q /dev/pts || mount -t devpts devpts /dev/pts
mountpoint -q /dev/shm || mount -t tmpfs tmpfs /dev/shm

# --- Set hostname -----------------------------------------------------------
echo "${HOSTNAME}" > /proc/sys/kernel/hostname
echo ":: Hostname set to ${HOSTNAME}"

# --- Set hardware clock -----------------------------------------------------
if [ "${HARDWARECLOCK}" = "UTC" ]; then
    hwclock --systohc --utc 2>/dev/null
else
    hwclock --systohc --localtime 2>/dev/null
fi

# --- Set timezone -----------------------------------------------------------
if [ -f "/usr/share/zoneinfo/${TIMEZONE}" ]; then
    ln -sf "/usr/share/zoneinfo/${TIMEZONE}" /etc/localtime
    echo ":: Timezone set to ${TIMEZONE}"
fi

# --- Set console keymap -----------------------------------------------------
if [ -n "${KEYMAP}" ]; then
    loadkeys "${KEYMAP}" 2>/dev/null && echo ":: Keymap set to ${KEYMAP}"
fi

# --- Set console font -------------------------------------------------------
if [ -n "${FONT}" ]; then
    setfont "${FONT}" 2>/dev/null && echo ":: Console font set to ${FONT}"
fi

# --- Filesystem check -------------------------------------------------------
echo ":: Checking filesystems..."
fsck -A -T -C -a
if [ $? -gt 1 ]; then
    echo "!! Filesystem errors detected. Dropping to emergency shell."
    echo "!! Run 'fsck' manually, then 'exit' to continue boot."
    /bin/bash
fi

# --- Mount all filesystems from fstab ---------------------------------------
echo ":: Mounting filesystems..."
mount -a
mount -o remount,rw /

# --- Activate swap ----------------------------------------------------------
echo ":: Activating swap..."
swapon -a

# --- Load kernel modules from rc.conf --------------------------------------
echo ":: Loading kernel modules..."
for mod in "${MODULES[@]}"; do
    modprobe "${mod}" && echo "   Loaded: ${mod}"
done

# --- Apply module parameters ------------------------------------------------
for param in "${MODULE_PARAMS[@]}"; do
    mod=$(echo "${param}" | awk '{print $1}')
    args=$(echo "${param}" | cut -d' ' -f2-)
    # Module params are passed at load time, but if already loaded,
    # try writing to sysfs
    if [ -d "/sys/module/${mod}/parameters" ]; then
        key=$(echo "${args}" | cut -d'=' -f1)
        val=$(echo "${args}" | cut -d'=' -f2)
        echo "${val}" > "/sys/module/${mod}/parameters/${key}" 2>/dev/null
    fi
done

# --- Apply sysctl settings --------------------------------------------------
if [ -f /etc/sysctl.conf ]; then
    sysctl -p /etc/sysctl.conf >/dev/null 2>&1
    echo ":: Applied sysctl settings"
fi

# --- Set up /tmp ------------------------------------------------------------
chmod 1777 /tmp

# --- Seed random number generator ------------------------------------------
if [ -f /var/lib/random-seed ]; then
    cat /var/lib/random-seed > /dev/urandom
fi
dd if=/dev/urandom of=/var/lib/random-seed count=1 bs=512 2>/dev/null

# --- Clear old PID files and locks ------------------------------------------
rm -f /run/*.pid /var/lock/* 2>/dev/null

echo ":: System initialization complete"