#!/usr/bin/env bash
# validate-collision-log.sh — Check build output for CollisionTracker findings
#
# Scans the build directory for any log files containing CollisionTracker
# output ([COLLISION-ERROR] or [COLLISION-WARN] markers). The runtime
# CollisionTracker runs during image assembly in redox_installer.
#
# Exit codes:
#   0 — No collision errors found
#   1 — Collision errors detected

set -euo pipefail

build_dir="${1:?Usage: validate-collision-log.sh <build-dir>}"

errors=0
warnings=0

if [ -d "$build_dir" ]; then
    while IFS= read -r logfile; do
        file_errors=$(grep -c '\[COLLISION-ERROR\]' "$logfile" 2>/dev/null || true)
        file_warnings=$(grep -c '\[COLLISION-WARN\]'  "$logfile" 2>/dev/null || true)
        if [ "$file_errors" -gt 0 ] || [ "$file_warnings" -gt 0 ]; then
            echo "  $logfile: $file_errors error(s), $file_warnings warning(s)"
            errors=$((errors + file_errors))
            warnings=$((warnings + file_warnings))
        fi
    done < <(find "$build_dir" -name '*.log' -type f 2>/dev/null)
fi

echo "=== CollisionTracker log validation ==="
echo "  Errors: $errors, Warnings: $warnings"

if [ "$errors" -gt 0 ]; then
    echo "FAILED: $errors collision error(s) in build logs" >&2
    echo "  The CollisionTracker detected init service or environment file collisions." >&2
    echo "  Fix: Move config [[files]] init services from /usr/lib/init.d/ to /etc/init.d/" >&2
    exit 1
fi

if [ "$warnings" -gt 0 ]; then
    echo "WARN: $warnings non-critical collision(s) detected (not blocking)"
fi

echo "PASSED: No collision errors"