#!/usr/bin/env bash
#
# Packs client-package/ into a single ZIP for handover.
#
# The result contains the client code AND its documentation, so a project can be
# integrated without access to this repository.
#
#     ./scripts/build-client-package.sh
#     ./scripts/build-client-package.sh --server-url https://manage.example.org
#
# With --server-url the placeholder in the shipped config.sample.php is replaced,
# so the recipient only has to fill in instance and token.

set -euo pipefail

SERVER_URL=""
VERSION="$(date +%Y%m%d)"

while [[ $# -gt 0 ]]; do
    case "$1" in
        --server-url)
            SERVER_URL="${2:-}"
            shift 2
            ;;
        --version)
            VERSION="${2:-}"
            shift 2
            ;;
        -h|--help)
            cat <<USAGE
Usage: $(basename "$0") [--server-url URL] [--version LABEL]

Builds build/manage-client-<version>.zip from client-package/.

  --server-url URL   Prefill MANAGE_SERVER_URL in the shipped config.sample.php
  --version LABEL    Label for the file name (default: today's date)
USAGE
            exit 0
            ;;
        *)
            echo "Error: unknown option: $1" >&2
            exit 1
            ;;
    esac
done

if ! command -v zip >/dev/null 2>&1; then
    echo "Error: zip is required." >&2
    exit 1
fi

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
SOURCE_DIR="${REPO_ROOT}/client-package"
BUILD_DIR="${REPO_ROOT}/build"

if [[ ! -d "$SOURCE_DIR" ]]; then
    echo "Error: client-package/ not found at ${SOURCE_DIR}" >&2
    exit 1
fi

STAGE="$(mktemp -d)"
trap 'rm -rf "$STAGE"' EXIT

cp -r "$SOURCE_DIR" "${STAGE}/manage-client-package"

# A config.php from local testing must never be handed out: it holds a token.
# Scoped to manage-client/ on purpose - examples/ ships config.php files that are
# documentation and must survive.
rm -f "${STAGE}/manage-client-package/manage-client/config.php"
find "${STAGE}/manage-client-package" -name "*.log" -delete
find "${STAGE}/manage-client-package" -name ".DS_Store" -delete

if [[ -n "$SERVER_URL" ]]; then
    SERVER_URL="${SERVER_URL%/}"
    SAMPLE="${STAGE}/manage-client-package/manage-client/config.sample.php"
    sed -i.bak -E \
        "s|(define\\(\"MANAGE_SERVER_URL\", \")[^\"]*(\"\\);)|\\1${SERVER_URL}\\2|" \
        "$SAMPLE"
    rm -f "${SAMPLE}.bak"
    echo "MANAGE_SERVER_URL prefilled: ${SERVER_URL}"
fi

# Stamp the build so a recipient can tell versions apart.
cat > "${STAGE}/manage-client-package/BUILD.txt" <<INFO
Manage client package
Built: $(date -Iseconds)
Label: ${VERSION}
Server: ${SERVER_URL:-not prefilled}

Start with README.md, then docs/01_QUICKSTART.md.
Browse the docs with: php -S localhost:8080 -t docs
INFO

mkdir -p "$BUILD_DIR"
ARCHIVE="${BUILD_DIR}/manage-client-${VERSION}.zip"
rm -f "$ARCHIVE"

(cd "$STAGE" && zip -qr "$ARCHIVE" "manage-client-package")

if command -v sha256sum >/dev/null 2>&1; then
    SHA="$(sha256sum "$ARCHIVE" | awk '{print $1}')"
else
    SHA="$(shasum -a 256 "$ARCHIVE" | awk '{print $1}')"
fi

cat <<SUMMARY

Package:  ${ARCHIVE}
Size:     $(wc -c < "$ARCHIVE" | tr -d '[:space:]') bytes
SHA-256:  ${SHA}

Hand this file to whoever integrates the project. It is self-contained:
code, documentation and examples.
SUMMARY