#!/usr/bin/env bash
set -Eeuo pipefail

# Bootstrap/downloader for the Proxmox configuration backup/recovery tools.
# Before publishing, set DEFAULT_RAW_BASE to your GitHub raw repository URL,
# ideally pinned to a release/tag for production use.

umask 077

DEFAULT_RAW_BASE="https://raw.githubusercontent.com/GATACA-Systemhaus/proxmox-dr-tools/main"
RAW_BASE="${1:-${PVE_DR_RAW_BASE:-$DEFAULT_RAW_BASE}}"
INSTALL_DIR="${PVE_DR_INSTALL_DIR:-/root}"

log() { printf '[%s] %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$*"; }
fail() { log "ERROR: $*" >&2; exit 1; }

[[ $EUID -eq 0 ]] || fail "Run this script as root."
command -v curl >/dev/null 2>&1 || fail "curl is required. Install it with: apt update && apt install -y curl"

resolve_raw_base() {
    local input
    if [[ "$RAW_BASE" == *"CHANGE-ME"* ]]; then
        echo
        echo "GitHub raw base URL is not configured in this bootstrap yet."
        echo "Example: https://raw.githubusercontent.com/ORG/REPO/v1.0"
        read -r -p "Raw base URL: " input
        [[ "$input" == https://raw.githubusercontent.com/* ]] || fail "Please enter a raw.githubusercontent.com URL."
        RAW_BASE="${input%/}"
    fi
}

download_one() {
    local file="$1" target tmp
    target="$INSTALL_DIR/$file"
    tmp="${target}.download.$$"
    mkdir -p "$INSTALL_DIR"
    log "Downloading $file"
    curl -fL --retry 2 --connect-timeout 15 "$RAW_BASE/$file" -o "$tmp"
    [[ -s "$tmp" ]] || { rm -f "$tmp"; fail "Downloaded file is empty: $file"; }
    if [[ "$file" == *.sh ]]; then
        sed -i 's/\r$//' "$tmp"
        bash -n "$tmp" || { rm -f "$tmp"; fail "Syntax check failed for $file"; }
    fi
    install -o root -g root -m 0700 "$tmp" "$target"
    rm -f "$tmp"
    echo "  [OK] $target"
}

maybe_run() {
    local file="$1" answer
    read -r -p "Run $file now? [y/N]: " answer
    case "$answer" in
        y|Y|j|J|yes|YES|ja|JA) exec "$INSTALL_DIR/$file" ;;
    esac
}

resolve_raw_base

while true; do
    echo
    echo "============================================================"
    echo " Proxmox Config Backup / Recovery Tools"
    echo "============================================================"
    echo "Quelle: $RAW_BASE"
    echo
    echo "  1) Backup-Script herunterladen/aktualisieren"
    echo "  2) Restore-Script herunterladen/aktualisieren"
    echo "  3) Scheduler herunterladen/aktualisieren"
    echo "  4) Alle drei Tools herunterladen/aktualisieren"
    echo "  5) Backup-Script herunterladen und starten"
    echo "  6) Restore-Script herunterladen und starten"
    echo "  7) Scheduler herunterladen und starten"
    echo "  8) Restore-Script herunterladen und Precheck (--check) starten"
    echo "  0) Beenden"
    read -r -p "Auswahl [0-8]: " choice
    case "$choice" in
        1) download_one pve-config-backup.sh ;;
        2) download_one pve-config-restore.sh ;;
        3) download_one pve-config-backup-scheduler.sh ;;
        4)
            download_one pve-config-backup.sh
            download_one pve-config-restore.sh
            download_one pve-config-backup-scheduler.sh
            ;;
        5) download_one pve-config-backup.sh; exec "$INSTALL_DIR/pve-config-backup.sh" ;;
        6) download_one pve-config-restore.sh; exec "$INSTALL_DIR/pve-config-restore.sh" ;;
        7) download_one pve-config-backup-scheduler.sh; exec "$INSTALL_DIR/pve-config-backup-scheduler.sh" ;;
        8) download_one pve-config-restore.sh; exec "$INSTALL_DIR/pve-config-restore.sh" --check ;;
        0) exit 0 ;;
        *) echo "Ungueltige Auswahl." ;;
    esac
done