#!/usr/bin/env sh
# keru-install — the Keru OS TUI installer
#
# Walks you through crafting your exact system, then writes make.conf and
# kicks off the build. Everything is swappable here, at install time, and
# locked in when you boot.
#
# Designed to run from the Keru live ISO. Backed by dialog/whiptail if
# present; falls back to plain prompted input. All shell, no magic.

set -eu

. "$(dirname "$0")/../scripts/common.sh"

# ---- defaults (mirror profile/make.conf) --------------------------------
OUT="${MAKE_CONF_OUT:-/tmp/keru/make.conf}"
DROP="/tmp/keru"
mkdir -p "$DROP"

# ---- menu helpers -------------------------------------------------------
pick() { # prompt, array-of-labels, defaults -> writes choice to $CHOICE
    local prompt="$1"; shift
    local default="$1"; shift
    CHOICE="$default"
    if command -v dialog >/dev/null 2>&1; then
        local args=()
        local i=0
        for opt in "$@"; do
            args+=("$i" "$opt")
            i=$((i+1))
        done
        local sel
        sel=$(dialog --stdout --no-cancel --menu "$prompt" 15 60 8 \
                  --default-item "$default" "${args[@]}") || true
        CHOICE=$(eval "printf '%s' \"\${$((sel+1)):-\$default}\"" 2>/dev/null || printf '%s' "$default")
    else
        printf '%s\n' "== $prompt =="
        local n=1
        for opt in "$@"; do
            printf '  %s) %s\n' "$n" "$opt"
            n=$((n+1))
        done
        printf 'Select [%s]: ' "$default"
        read -r sel
        [ -n "$sel" ] && CHOICE=$(eval "printf '%s' \"\${$sel}\"") || CHOICE="$default"
    fi
}

# ---- swappable selections ------------------------------------------------
banner "Keru OS — craft your system"

pick "Init system" runit  runit s6 openrc systemd
INIT="$CHOICE"

pick "C library" glibc glibc musl
LIBC="$CHOICE"

pick "Filesystem" ext4 ext4 btrfs xfs zfs f2fs
TARGET_FS="$CHOICE"

pick "Kernel" linux linux linux-lts linux-hardened
KERNEL="$CHOICE"

pick "Network tools" nmtui networkmanager nmtui connman
NET="$CHOICE"

# ---- assemble make.conf ------------------------------------------------
msg "writing $OUT"
cat > "$OUT" <<EOF
# Generated by keru-install — hand-tune then rebuild if you like.
INIT=$INIT
LIBC=$LIBC
TARGET_FS=$TARGET_FS
KERNEL=$KERNEL
NET=$NET
LICENSE_ACCEPT=(*)
EOF

msg "profile complete:"
cat "$OUT"

read -r -p "Build now? [y/N] " go
case "$go" in
    y|Y|yes)
        "$(dirname "$0")/../scripts/build-root.sh" "$OUT"
        ;;
    *)
        msg "saved profile to $OUT (run scripts/build-root.sh to build)"
        ;;
esac