#!/usr/bin/env bash
# Build a clean WordPress-installable release ZIP for this plugin.
# Reads .distignore to decide what gets excluded.
# Usage: ./build.sh [version-override]

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PLUGIN_SLUG="$(basename "$SCRIPT_DIR")"
MAIN_FILE="$SCRIPT_DIR/${PLUGIN_SLUG}.php"
OUT_DIR="$SCRIPT_DIR/build"

if [[ ! -f "$MAIN_FILE" ]]; then
  echo "ERROR: main plugin file $MAIN_FILE not found" >&2
  exit 1
fi

VERSION="${1:-$(grep -E "^\s*\*\s*Version:" "$MAIN_FILE" | head -1 | awk '{print $NF}')}"
if [[ -z "$VERSION" ]]; then
  echo "ERROR: could not determine version" >&2
  exit 1
fi

ZIP_NAME="${PLUGIN_SLUG}-${VERSION}.zip"
OUT_ZIP="$OUT_DIR/$ZIP_NAME"
STAGE="$(mktemp -d -t "${PLUGIN_SLUG}-build-XXXXXX")"
trap "rm -rf '$STAGE'" EXIT

echo "Building $PLUGIN_SLUG v$VERSION → $OUT_ZIP"

EXCLUDE_ARGS=(--exclude='.git')
if [[ -f "$SCRIPT_DIR/.distignore" ]]; then
  while IFS= read -r line; do
    [[ "$line" =~ ^[[:space:]]*# ]] && continue
    [[ -z "${line// }" ]] && continue
    EXCLUDE_ARGS+=(--exclude="$line")
  done < "$SCRIPT_DIR/.distignore"
fi

mkdir -p "$STAGE/$PLUGIN_SLUG"
rsync -a "${EXCLUDE_ARGS[@]}" "$SCRIPT_DIR/" "$STAGE/$PLUGIN_SLUG/"

mkdir -p "$OUT_DIR"
rm -f "$OUT_ZIP"
( cd "$STAGE" && zip -rq "$OUT_ZIP" "$PLUGIN_SLUG" )

SIZE=$(numfmt --to=iec --suffix=B "$(stat -c '%s' "$OUT_ZIP")")
COUNT=$(unzip -Z1 "$OUT_ZIP" | wc -l)
echo "✓ Built: $ZIP_NAME ($SIZE, $COUNT files)"