#!/system/bin/sh
# Driver Manager v2 - Core Utilities
# Shared functions for all scripts

MODDIR=${MODDIR:-/data/adb/modules/driver-manager}
CONFIGDIR="$MODDIR/config"
LOGDIR="$MODDIR/logs"
RUNDIR="$MODDIR/run"

# --- Logging ---
_LOGFILE=""

log_init() {
    _LOGFILE="$1"
    mkdir -p "$(dirname "$_LOGFILE")" 2>/dev/null
}

log() {
    local msg="[$(date '+%H:%M:%S')] $1"
    [ -n "$_LOGFILE" ] && echo "$msg" >> "$_LOGFILE"
}

log_error() { log "ERROR: $1"; }

# --- JSON helpers (minimal, no jq dependency) ---
# Read a string value from a JSON file
json_get() {
    local file="$1" key="$2"
    grep -o "\"$key\"[[:space:]]*:[[:space:]]*\"[^\"]*\"" "$file" 2>/dev/null | \
        head -1 | sed 's/.*:[[:space:]]*"\([^"]*\)"/\1/'
}

# Read a number/bool value from a JSON file
json_get_raw() {
    local file="$1" key="$2"
    grep -o "\"$key\"[[:space:]]*:[[:space:]]*[^,}]*" "$file" 2>/dev/null | \
        head -1 | sed 's/.*:[[:space:]]*//' | tr -d ' '
}

# Set a string value in a JSON file
json_set() {
    local file="$1" key="$2" value="$3"
    if grep -q "\"$key\"" "$file" 2>/dev/null; then
        sed -i "s|\"$key\"[[:space:]]*:[[:space:]]*\"[^\"]*\"|\"$key\": \"$value\"|" "$file"
    fi
}

# --- File helpers ---
sha256() {
    sha256sum "$1" 2>/dev/null | cut -d' ' -f1
}

get_selinux_context() {
    ls -Z "$1" 2>/dev/null | awk '{print $1}'
}

file_size() {
    stat -c%s "$1" 2>/dev/null || wc -c < "$1" 2>/dev/null
}

# --- Process helpers ---
pid_of() {
    pidof "$1" 2>/dev/null || pgrep -f "$1" 2>/dev/null
}

is_running() {
    [ -f "$RUNDIR/$1.pid" ] && kill -0 $(cat "$RUNDIR/$1.pid") 2>/dev/null
}

kill_by_pidfile() {
    local pidfile="$RUNDIR/$1.pid"
    if [ -f "$pidfile" ]; then
        kill $(cat "$pidfile") 2>/dev/null
        rm -f "$pidfile"
    fi
}

# --- Settings helpers ---
get_setting() {
    json_get "$CONFIGDIR/settings.json" "$1"
}

get_setting_raw() {
    json_get_raw "$CONFIGDIR/settings.json" "$1"
}