#!/usr/bin/env bash
#
# bt-netconfig-boot - re-apply saved network settings after reboot.
# Runs as root from buttontask-network.service once NetworkManager is up.
# Does not block UI startup: short waits, bounded activation, best-effort apply.
set -uo pipefail

ROOT="${BUTTONTASK_ROOT:-/opt/buttontask}"
CFG="$ROOT/config/network.json"
SCRIPT="$ROOT/scripts/bt-netconfig"
NM_WAIT_SEC="${BUTTONTASK_NET_NM_WAIT:-15}"
IFACE_WAIT_SEC="${BUTTONTASK_NET_IFACE_WAIT:-10}"
ACTIVATE_TIMEOUT="${BUTTONTASK_NET_ACTIVATE_TIMEOUT:-10}"

log() { echo "bt-netconfig-boot: $*"; }

wait_for_iface() {
    local iface="$1" i
    for i in $(seq 1 "$IFACE_WAIT_SEC"); do
        ip link show "$iface" &>/dev/null && return 0
        sleep 1
    done
    return 1
}

wait_for_nm() {
    local i
    for i in $(seq 1 "$NM_WAIT_SEC"); do
        nmcli general status &>/dev/null && return 0
        sleep 1
    done
    return 1
}

activate_profile() {
    local con="$1" iface="$2"
    if command -v timeout >/dev/null 2>&1; then
        timeout "$ACTIVATE_TIMEOUT" nmcli connection up "$con" ifname "$iface" 2>/dev/null \
            || timeout "$ACTIVATE_TIMEOUT" nmcli connection up "$con" 2>/dev/null \
            || true
    else
        nmcli connection up "$con" ifname "$iface" 2>/dev/null \
            || nmcli connection up "$con" 2>/dev/null || true
    fi
}

apply_saved() {
    [ -f "$CFG" ] || { log "no saved config at $CFG"; return 0; }
    [ -x "$SCRIPT" ] || { log "bt-netconfig missing: $SCRIPT"; return 1; }

    BUTTONTASK_NET_BOOT=1 \
    BUTTONTASK_NET_ACTIVATE_TIMEOUT="$ACTIVATE_TIMEOUT" \
    python3 - "$CFG" "$SCRIPT" <<'PY'
import json, os, subprocess, sys

cfg_path, script = sys.argv[1], sys.argv[2]
with open(cfg_path, encoding="utf-8") as f:
    cfg = json.load(f)
iface = (cfg.get("iface") or "").strip()
mode = (cfg.get("mode") or "").strip()
if not iface or mode not in ("dhcp", "static"):
    sys.exit(0)
args = [script, iface, mode]
if mode == "static":
    args += [
        cfg.get("address", ""),
        str(cfg.get("prefix", 24)),
        cfg.get("gateway", ""),
        cfg.get("dns", ""),
    ]
env = os.environ.copy()
env.setdefault("BUTTONTASK_NET_BOOT", "1")
raise SystemExit(subprocess.run(args, env=env).returncode)
PY
}

IFACE="eth0"
if [ -f "$CFG" ]; then
    IFACE="$(python3 -c "import json; print(json.load(open('$CFG')).get('iface','eth0'))" 2>/dev/null || echo eth0)"
fi

wait_for_nm || log "NetworkManager not ready, continuing anyway"
wait_for_iface "$IFACE" || log "interface $IFACE not found, continuing anyway"

if apply_saved; then
    log "network profile applied on $IFACE (activation may continue in background)"
else
    log "saved config apply failed, trying buttontask profiles"
    while IFS= read -r con; do
        [ -z "$con" ] && continue
        iface="${con#buttontask-}"
        activate_profile "$con" "$iface"
    done < <(nmcli -t -f NAME connection show 2>/dev/null | grep '^buttontask-' || true)
fi