#!/usr/bin/env bash
# build.sh — Build PassKeeper extension for Chrome (MV3) and Firefox (MV2).
#
# Usage:
#   ./build.sh              # build both targets
#   ./build.sh chrome       # Chrome only
#   ./build.sh firefox      # Firefox only
#
# Output:
#   dist/passkeeper-chrome.zip
#   dist/passkeeper-firefox.zip
#
# Requirements: zip (standard on macOS/Linux)

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
EXT_DIR="$SCRIPT_DIR/extension"
DIST_DIR="$SCRIPT_DIR/dist"

# Files and directories included in every build (relative to extension/).
COMMON_FILES=(
  "content"
  "popup"
  "bridge"
  "shared"
  "icons"
)

TARGET="${1:-both}"

mkdir -p "$DIST_DIR"

# ── Helpers ───────────────────────────────────────────────────────────────────

build_chrome() {
  local out="$DIST_DIR/passkeeper-chrome.zip"
  echo "Building Chrome (MV3) → $out"
  rm -f "$out"

  (
    cd "$EXT_DIR"
    zip -r "$out" manifest.json background.js "${COMMON_FILES[@]}" \
      --exclude "*.DS_Store" --exclude "**/__pycache__/*" --exclude "*.py"
  )

  echo "  ✓ Chrome build complete: $out ($(du -sh "$out" | cut -f1))"
}

build_firefox() {
  local out="$DIST_DIR/passkeeper-firefox.zip"
  echo "Building Firefox (MV2) → $out"
  rm -f "$out"

  # Firefox uses a different manifest and background script.
  # We build into a temp directory so we can swap those files cleanly.
  local tmp
  tmp="$(mktemp -d)"
  trap "rm -rf '$tmp'" EXIT

  # Copy common files into temp dir.
  for item in "${COMMON_FILES[@]}"; do
    cp -r "$EXT_DIR/$item" "$tmp/"
  done

  # Swap in Firefox-specific manifest and background.
  cp "$EXT_DIR/manifest.firefox.json" "$tmp/manifest.json"
  cp "$EXT_DIR/background.firefox.js" "$tmp/background.js"

  (
    cd "$tmp"
    zip -r "$out" . \
      --exclude "*.DS_Store" --exclude "**/__pycache__/*" --exclude "*.py"
  )

  echo "  ✓ Firefox build complete: $out ($(du -sh "$out" | cut -f1))"
}

# ── Main ──────────────────────────────────────────────────────────────────────

case "$TARGET" in
  chrome)  build_chrome  ;;
  firefox) build_firefox ;;
  both)    build_chrome; build_firefox ;;
  *)
    echo "Usage: $0 [chrome|firefox|both]" >&2
    exit 1
    ;;
esac

echo "Done. Packages are in $DIST_DIR/"