#!/usr/bin/env bash
# check-unwired-patches.sh — detect patch files not referenced in any recipe.toml
#
# Scans local/patches/ for .patch files that exist on disk but are NOT listed
# in any recipe's patches = [...] array. Also detects patches that are symlinked
# into recipes/ but whose recipe.toml entry no longer exists.
#
# Usage: ./local/scripts/check-unwired-patches.sh [--strict]
#   --strict: exit non-zero if any unwired patches found (for CI)

set -euo pipefail

ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
STRICT=false
[[ "${1:-}" == "--strict" ]] && STRICT=true

UNWIRED=0

echo "=== Unwired Patch Check ==="

# Map patch file → list of recipe.toml files that reference it
declare -A PATCH_REFS

# Find all recipe.toml files
while IFS= read -r -d '' recipe; do
    # Extract patch filenames from patches = [...] array
    # Handles both local/patches/... and relative paths
    while IFS= read -r patch_ref; do
        # Resolve the patch path relative to the recipe directory
        recipe_dir="$(dirname "$recipe")"
        patch_path="$(cd "$recipe_dir" && realpath -m "$patch_ref" 2>/dev/null || echo "$recipe_dir/$patch_ref")"
        PATCH_REFS["$patch_path"]+="$recipe "
    done < <(grep -oP '"[^"]+\.patch"' "$recipe" | tr -d '"')
done < <(find "$ROOT/recipes" "$ROOT/local/recipes" -name 'recipe.toml' -print0 2>/dev/null)

# Find all patch files in local/patches/
while IFS= read -r -d '' patch; do
    patch_real="$(realpath "$patch")"
    found=false
    for ref in "${!PATCH_REFS[@]}"; do
        ref_real="$(realpath "$ref" 2>/dev/null || echo "$ref")"
        if [[ "$ref_real" == "$patch_real" ]]; then
            found=true
            break
        fi
    done
    if ! $found; then
        UNWIRED=$((UNWIRED + 1))
        echo "  UNWIRED: $patch"
    fi
done < <(find "$ROOT/local/patches" -name '*.patch' -print0 2>/dev/null)

echo ""
if [[ $UNWIRED -eq 0 ]]; then
    echo "✅ All patches wired"
else
    echo "⚠️  $UNWIRED unwired patch(es) found"
    $STRICT && exit 1
fi
exit 0