#!/bin/bash
# Build a .deb package for irc-bot.
# Run on any Debian/Ubuntu host: bash build_deb.sh
set -euo pipefail

PACKAGE=irc-bot
VERSION=1.0.0
ARCH=all
DEB_NAME="${PACKAGE}_${VERSION}_${ARCH}.deb"
BUILD_DIR="$(mktemp -d)"
PKG_ROOT="${BUILD_DIR}/${PACKAGE}"

echo "==> Building ${DEB_NAME} in ${BUILD_DIR}"

# ── Directory layout inside the .deb ─────────────────────────────────────────
install -d "${PKG_ROOT}/DEBIAN"
install -d "${PKG_ROOT}/opt/irc-bot/bot"
install -d "${PKG_ROOT}/opt/irc-bot/portal/templates"
install -d "${PKG_ROOT}/opt/irc-bot/portal/static"
install -d "${PKG_ROOT}/opt/irc-bot/config"
install -d "${PKG_ROOT}/lib/systemd/system"
# Runtime dirs are created by postinst, not shipped in the package
# (avoids dpkg owning /var/lib/irc-bot with wrong permissions before user exists)

# ── Application source ────────────────────────────────────────────────────────
cp bot/__init__.py        "${PKG_ROOT}/opt/irc-bot/bot/"
cp bot/irc_client.py      "${PKG_ROOT}/opt/irc-bot/bot/"
cp bot/llm_client.py      "${PKG_ROOT}/opt/irc-bot/bot/"
cp bot/memory.py          "${PKG_ROOT}/opt/irc-bot/bot/"
cp bot/message_handler.py "${PKG_ROOT}/opt/irc-bot/bot/"

cp portal/__init__.py        "${PKG_ROOT}/opt/irc-bot/portal/"
cp portal/app.py             "${PKG_ROOT}/opt/irc-bot/portal/"
cp portal/config_manager.py  "${PKG_ROOT}/opt/irc-bot/portal/"
cp -r portal/templates/      "${PKG_ROOT}/opt/irc-bot/portal/"
cp -r portal/static/         "${PKG_ROOT}/opt/irc-bot/portal/"

cp requirements.txt "${PKG_ROOT}/opt/irc-bot/"
cp .env.example     "${PKG_ROOT}/opt/irc-bot/"
cp README.md        "${PKG_ROOT}/opt/irc-bot/"

# Default config.json — marked as conffile so dpkg won't overwrite on upgrade
install -d "${PKG_ROOT}/etc/irc-bot"
cp config/config.json "${PKG_ROOT}/etc/irc-bot/config.json"

# ── Systemd units ─────────────────────────────────────────────────────────────
cp debian/systemd/irc-bot.service        "${PKG_ROOT}/lib/systemd/system/"
cp debian/systemd/irc-bot-portal.service "${PKG_ROOT}/lib/systemd/system/"

# ── DEBIAN control files ──────────────────────────────────────────────────────
cp debian/control   "${PKG_ROOT}/DEBIAN/control"
cp debian/conffiles "${PKG_ROOT}/DEBIAN/conffiles"
cp debian/postinst  "${PKG_ROOT}/DEBIAN/postinst"
cp debian/prerm     "${PKG_ROOT}/DEBIAN/prerm"
cp debian/postrm    "${PKG_ROOT}/DEBIAN/postrm"

chmod 755 "${PKG_ROOT}/DEBIAN/postinst"
chmod 755 "${PKG_ROOT}/DEBIAN/prerm"
chmod 755 "${PKG_ROOT}/DEBIAN/postrm"

# ── Installed-Size (approximate, in KB) ──────────────────────────────────────
SIZE_KB=$(du -sk "${PKG_ROOT}" | cut -f1)
sed -i "s/^Installed-Size:.*/Installed-Size: ${SIZE_KB}/" "${PKG_ROOT}/DEBIAN/control" 2>/dev/null || true
printf "\nInstalled-Size: ${SIZE_KB}\n" >> "${PKG_ROOT}/DEBIAN/control"

# ── Build ─────────────────────────────────────────────────────────────────────
dpkg-deb --build --root-owner-group "${PKG_ROOT}" "${DEB_NAME}"

echo ""
echo "==> Built: ${DEB_NAME}"
echo ""
echo "Install with:"
echo "  sudo dpkg -i ${DEB_NAME}"
echo "  sudo apt-get install -f   # resolve any missing deps"
echo ""
echo "Then edit /etc/irc-bot/.env and start:"
echo "  sudo systemctl start irc-bot irc-bot-portal"

# Cleanup
rm -rf "${BUILD_DIR}"