#!/usr/bin/env bash
set -euo pipefail

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

SOURCE_DIR="$REPO_ROOT/out/linux/bin"
OUTPUT_DIR="$REPO_ROOT/dist/UpdateClientSDK-linux"
ARCHIVE_FILE="$REPO_ROOT/dist/UpdateClientSDK-linux.tar.gz"
SDK_VERSION="0.1.0"
EXAMPLE_CONFIG="$REPO_ROOT/config/app_config.linux.example.json"
INCLUDE_DEMO_MAIN_APP=0

usage() {
  cat <<'EOF'
Usage: package-sdk.sh [options]

Options:
  --source-dir DIR       Linux Release output directory. Default: ./out/linux/bin
  --output-dir DIR       SDK directory to generate. Default: ./dist/UpdateClientSDK-linux
  --archive FILE         SDK tar.gz path. Default: ./dist/UpdateClientSDK-linux.tar.gz
  --sdk-version VERSION  SDK version. Default: 0.1.0
  --example-config FILE  app_config template. Default: ./config/app_config.linux.example.json
  --include-demo-mainapp Include MainApp demo executable in SDK bin.
  -h, --help             Show this help.
EOF
}

while [[ $# -gt 0 ]]; do
  case "$1" in
    --source-dir) SOURCE_DIR="$2"; shift 2 ;;
    --output-dir) OUTPUT_DIR="$2"; shift 2 ;;
    --archive|--tar-file|--zip-file) ARCHIVE_FILE="$2"; shift 2 ;;
    --sdk-version) SDK_VERSION="$2"; shift 2 ;;
    --example-config) EXAMPLE_CONFIG="$2"; shift 2 ;;
    --include-demo-mainapp) INCLUDE_DEMO_MAIN_APP=1; shift ;;
    -h|--help) usage; exit 0 ;;
    *) echo "Unknown option: $1" >&2; usage >&2; exit 2 ;;
  esac
done

SOURCE_DIR="$(realpath "$SOURCE_DIR")"
EXAMPLE_CONFIG="$(realpath "$EXAMPLE_CONFIG")"
OUTPUT_DIR="$(realpath -m "$OUTPUT_DIR")"
ARCHIVE_FILE="$(realpath -m "$ARCHIVE_FILE")"

for name in Launcher Updater Bootstrap; do
  if [[ ! -f "$SOURCE_DIR/$name" ]]; then
    echo "SDK source directory is missing required file: $SOURCE_DIR/$name" >&2
    exit 1
  fi
done

PUBLIC_KEY=""
for candidate in \
  "$SOURCE_DIR/config/manifest_public_key.pem" \
  "$SOURCE_DIR/manifest_public_key.pem" \
  "$REPO_ROOT/config/manifest_public_key.pem"; do
  if [[ -f "$candidate" ]]; then
    PUBLIC_KEY="$candidate"
    break
  fi
done
if [[ -z "$PUBLIC_KEY" ]]; then
  echo "manifest_public_key.pem is missing. Prepare the public key that matches the server signing private key." >&2
  exit 1
fi

DEBUG_ARTIFACT="$(find "$SOURCE_DIR" -type f \( -name '*.pdb' -o -name '*.ilk' -o -name '*d.dll' \) -print -quit)"
if [[ -n "$DEBUG_ARTIFACT" ]]; then
  echo "SDK source directory contains Debug artifacts. Use a clean Release output directory." >&2
  echo "Example: $DEBUG_ARTIFACT" >&2
  exit 1
fi

rm -rf "$OUTPUT_DIR"
mkdir -p "$OUTPUT_DIR/bin" "$OUTPUT_DIR/config" "$OUTPUT_DIR/scripts" "$OUTPUT_DIR/Common"

shopt -s dotglob nullglob
for item in "$SOURCE_DIR"/*; do
  base="$(basename "$item")"
  case "$base" in
    config|update|update_temp|manifest_public_key.pem|MainApp)
      if [[ "$base" == "MainApp" && "$INCLUDE_DEMO_MAIN_APP" -eq 1 ]]; then
        cp -a "$item" "$OUTPUT_DIR/bin/"
      fi
      ;;
    *)
      cp -a "$item" "$OUTPUT_DIR/bin/"
      ;;
  esac
done
shopt -u dotglob nullglob

cp "$EXAMPLE_CONFIG" "$OUTPUT_DIR/config/app_config.json"
cp "$PUBLIC_KEY" "$OUTPUT_DIR/config/manifest_public_key.pem"
cp "$REPO_ROOT/config/server_config.json" "$OUTPUT_DIR/config/server_config.json"
cp "$REPO_ROOT/config/server_config.qrc" "$OUTPUT_DIR/config/server_config.qrc"

for common_file in ConfigHelper.h ConfigHelper.cpp TicketHelper.h TicketHelper.cpp; do
  common_path="$REPO_ROOT/Common/$common_file"
  if [[ ! -f "$common_path" ]]; then
    echo "SDK Common integration source is missing: $common_path" >&2
    exit 1
  fi
  cp "$common_path" "$OUTPUT_DIR/Common/$common_file"
done

WORD_GUIDE="$(find "$REPO_ROOT" "$REPO_ROOT/Docs" -maxdepth 1 -type f -name '*SDK*.docx' ! -name '~$*' 2>/dev/null | sort | sed -n '1p')"
if [[ -z "$WORD_GUIDE" ]]; then
  echo "SDK integration Word guide is missing. Expected a *SDK*.docx file in the repository root or Docs directory." >&2
  exit 1
fi
cp "$WORD_GUIDE" "$OUTPUT_DIR/$(basename "$WORD_GUIDE")"

cp "$SCRIPT_DIR/package-sdk.sh" "$OUTPUT_DIR/scripts/package-sdk.sh"
cp "$SCRIPT_DIR/package-client.sh" "$OUTPUT_DIR/scripts/package-client.sh"
if [[ -f "$SCRIPT_DIR/install-sdk.ps1" ]]; then cp "$SCRIPT_DIR/install-sdk.ps1" "$OUTPUT_DIR/scripts/install-sdk.ps1"; fi
if [[ -f "$SCRIPT_DIR/package-sdk.ps1" ]]; then cp "$SCRIPT_DIR/package-sdk.ps1" "$OUTPUT_DIR/scripts/package-sdk.ps1"; fi
if [[ -f "$SCRIPT_DIR/package-client.ps1" ]]; then cp "$SCRIPT_DIR/package-client.ps1" "$OUTPUT_DIR/scripts/package-client.ps1"; fi

chmod +x "$OUTPUT_DIR/bin/Launcher" "$OUTPUT_DIR/bin/Updater" "$OUTPUT_DIR/bin/Bootstrap" 2>/dev/null || true
chmod +x "$OUTPUT_DIR/scripts/package-sdk.sh" "$OUTPUT_DIR/scripts/package-client.sh"

cat > "$OUTPUT_DIR/sdk_manifest.json" <<EOF
{
  "sdk_version": "$SDK_VERSION",
  "generated_at": "$(date -u +%Y-%m-%dT%H:%M:%SZ)",
  "sdk_type": "external-updater-runtime",
  "platform": "linux",
  "required_entry": "Launcher",
  "contains_demo_main_app": $([[ "$INCLUDE_DEMO_MAIN_APP" -eq 1 ]] && echo true || echo false),
  "integration_sources": [
    "ConfigHelper.h",
    "ConfigHelper.cpp",
    "TicketHelper.h",
    "TicketHelper.cpp"
  ]
}
EOF

mkdir -p "$(dirname "$ARCHIVE_FILE")"
rm -f "$ARCHIVE_FILE"
tar -C "$OUTPUT_DIR" -czf "$ARCHIVE_FILE" .

echo "SDK directory: $OUTPUT_DIR"
echo "SDK archive: $ARCHIVE_FILE"
echo "SDK version: $SDK_VERSION"