#!/bin/bash
# Test ISO build using the container sandbox
# Creates a minimal Arch ISO to verify the build pipeline works

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"

# Configuration
PROFILE_DIR="$PROJECT_ROOT/tests/fixtures/archiso-test-profile"
OUTPUT_DIR="$PROJECT_ROOT/tmp/iso-test-output"
BUILD_IMAGE="debate-archiso-builder:latest"

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

# Detect container runtime (prefer docker for LXC compatibility)
if command -v docker &> /dev/null; then
    RUNTIME="docker"
elif command -v podman &> /dev/null; then
    RUNTIME="podman"
else
    log "ERROR: No container runtime found. Install podman or docker."
    exit 1
fi

log "Using runtime: $RUNTIME"

# Check if build image exists
if ! $RUNTIME image inspect "$BUILD_IMAGE" &> /dev/null; then
    log "Build image not found. Run: ./scripts/setup-sandbox.sh"
    exit 1
fi

# Create output directory
mkdir -p "$OUTPUT_DIR"
log "Output directory: $OUTPUT_DIR"

# Run the build
log "Starting ISO build (this may take several minutes)..."
log "Profile: $PROFILE_DIR"

# Note: Network enabled for package downloads during build
# Production builds should use pre-cached packages for --network=none
$RUNTIME run \
    --name debate-test-build \
    --rm \
    --privileged \
    --tmpfs=/tmp:exec,mode=1777 \
    --tmpfs=/var/tmp:exec,mode=1777 \
    -v "$PROFILE_DIR:/build/profile:ro" \
    -v "$OUTPUT_DIR:/build/output:rw" \
    -e SOURCE_DATE_EPOCH=1704067200 \
    -e LC_ALL=C \
    -e TZ=UTC \
    "$BUILD_IMAGE" \
    mkarchiso -v -w /tmp/archiso-work -o /build/output /build/profile

# Check result
if ls "$OUTPUT_DIR"/*.iso &> /dev/null; then
    ISO_FILE=$(ls "$OUTPUT_DIR"/*.iso | head -1)
    ISO_SIZE=$(du -h "$ISO_FILE" | cut -f1)
    log "SUCCESS! ISO created: $ISO_FILE ($ISO_SIZE)"
    log ""
    log "To verify the ISO:"
    log "  sha256sum $ISO_FILE"
    log ""
    log "To test in a VM:"
    log "  qemu-system-x86_64 -cdrom $ISO_FILE -m 2G -enable-kvm"
else
    log "ERROR: No ISO file found in output directory"
    log "Check the build output above for errors"
    exit 1
fi