#!/bin/bash
# Setup build sandbox for Debate platform
# Works on any Linux distribution with podman or docker
#
# LXC/Proxmox VE Requirements:
#   If running in an LXC container, enable nesting:
#   - Proxmox UI: Container -> Options -> Features -> Nesting: checked
#   - Or via CLI: pct set <vmid> -features nesting=1
#   - Container may need to be privileged for full functionality

set -euo pipefail

log() {
    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1"
}

# Detect container runtime (prefer podman)
if command -v podman &> /dev/null; then
    RUNTIME="podman"
    log "Found podman (recommended)"
elif command -v docker &> /dev/null; then
    RUNTIME="docker"
    log "Found docker"
else
    log "ERROR: No container runtime found."
    log "Install podman (recommended) or docker:"
    log "  Debian/Ubuntu: apt install podman"
    log "  Fedora: dnf install podman"
    log "  Arch: pacman -S podman"
    exit 1
fi

# Configuration
BUILD_IMAGE="debate-archiso-builder:latest"
BASE_IMAGE="ghcr.io/archlinux/archlinux:latest"

# Check if build image already exists
if $RUNTIME image inspect "$BUILD_IMAGE" &> /dev/null; then
    log "Build image already exists: $BUILD_IMAGE"
    log "To rebuild, run: $RUNTIME rmi $BUILD_IMAGE"
    exit 0
fi

log "Building Debate ISO builder image..."
log "This will pull Arch Linux and install archiso (~500MB download)"

# Pull base image
log "Pulling base Arch Linux image..."
$RUNTIME pull "$BASE_IMAGE"

# Build our image with archiso
log "Installing archiso into image..."

$RUNTIME build -t "$BUILD_IMAGE" -f - . << 'DOCKERFILE'
FROM ghcr.io/archlinux/archlinux:latest

# Update and install archiso
RUN pacman -Syu --noconfirm && \
    pacman -S --noconfirm archiso && \
    pacman -Scc --noconfirm

# Set fixed locale for determinism
RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen && locale-gen
ENV LC_ALL=C
ENV TZ=UTC

# Create build directories
RUN mkdir -p /build/profile /build/output /build/work

WORKDIR /build
DOCKERFILE

log "Build image created successfully: $BUILD_IMAGE"
log ""
log "Sandbox is ready. The application will use this image for ISO builds."
log "Runtime: $RUNTIME"
log ""
log "To test the image manually:"
log "  $RUNTIME run --rm -it $BUILD_IMAGE mkarchiso --help"