#!/bin/bash
# Build dupfinder.deb and upload it to the Gitea package registry.
# Run this on the NAS / any Linux machine with dpkg-deb and curl installed.
#
# Usage:
#   ./debian/build-deb.sh
#   ./debian/build-deb.sh --no-upload   # build only, skip Gitea upload
set -e

REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
DEBIAN_DIR="$REPO_ROOT/debian"
BUILD_DIR="$REPO_ROOT/build/deb"

# ── Config ────────────────────────────────────────────────────────────────────
PKG_NAME="dupfinder"
PKG_VERSION="1.1.2"
PKG_ARCH="amd64"
DEB_FILE="${PKG_NAME}_${PKG_VERSION}_${PKG_ARCH}.deb"

GITEA_URL="http://192.168.1.64:3000"
GITEA_OWNER="tocmo0nlord"
GITEA_TOKEN="${GITEA_TOKEN:-7f8d32ca83f2af6047e78cba0e13b5d63269c104}"
DISTRO="bookworm"
COMPONENT="main"

NO_UPLOAD=false
[[ "${1}" == "--no-upload" ]] && NO_UPLOAD=true

# ── Helpers ───────────────────────────────────────────────────────────────────
info() { echo -e "\033[0;36m==> $*\033[0m"; }
ok()   { echo -e "\033[0;32m    OK  $*\033[0m"; }
fail() { echo -e "\033[0;31m    !!  $*\033[0m"; exit 1; }

# ── Check dependencies ────────────────────────────────────────────────────────
command -v dpkg-deb &>/dev/null || fail "dpkg-deb not found. Run: sudo apt install dpkg-dev"
command -v curl     &>/dev/null || fail "curl not found. Run: sudo apt install curl"

# ── Prepare staging area ──────────────────────────────────────────────────────
info "Preparing build directory..."
PKG_STAGE="$BUILD_DIR/${PKG_NAME}_${PKG_VERSION}_${PKG_ARCH}"
rm -rf "$PKG_STAGE"
mkdir -p "$PKG_STAGE/DEBIAN"

# ── Copy DEBIAN control files ─────────────────────────────────────────────────
info "Copying control files..."
cp "$DEBIAN_DIR/control"  "$PKG_STAGE/DEBIAN/control"
cp "$DEBIAN_DIR/postinst" "$PKG_STAGE/DEBIAN/postinst"
cp "$DEBIAN_DIR/prerm"    "$PKG_STAGE/DEBIAN/prerm"
cp "$DEBIAN_DIR/postrm"   "$PKG_STAGE/DEBIAN/postrm"

# Inject current version into control file
sed -i "s/^Version:.*/Version: $PKG_VERSION/" "$PKG_STAGE/DEBIAN/control"

# Fix permissions — maintainer scripts must be executable
chmod 755 "$PKG_STAGE/DEBIAN/postinst" \
          "$PKG_STAGE/DEBIAN/prerm"    \
          "$PKG_STAGE/DEBIAN/postrm"

# ── Copy payload files ────────────────────────────────────────────────────────
info "Copying payload files..."
cp -r "$DEBIAN_DIR/files/." "$PKG_STAGE/"

# Copy the docker-compose.yml from repo root into the package
mkdir -p "$PKG_STAGE/opt/dupfinder"
cp "$REPO_ROOT/docker-compose.yml" "$PKG_STAGE/opt/dupfinder/docker-compose.yml"

# Copy source as fallback build path. Preserve the app/ subdirectory layout
# so the Dockerfile's `COPY app/ /app/` resolves correctly when building from
# this staged source dir.
SRC_STAGE="$PKG_STAGE/opt/dupfinder/source"
mkdir -p "$SRC_STAGE"
cp -r "$REPO_ROOT/app"              "$SRC_STAGE/app"
cp -r "$REPO_ROOT/templates"        "$SRC_STAGE/templates"
cp    "$REPO_ROOT/Dockerfile"       "$SRC_STAGE/Dockerfile"
cp    "$REPO_ROOT/requirements.txt" "$SRC_STAGE/requirements.txt"

# ── Fix file permissions ──────────────────────────────────────────────────────
find "$PKG_STAGE" -type f -name "*.sh" -exec chmod 755 {} \;
chmod 755 "$PKG_STAGE/usr/local/bin/dupfinder" 2>/dev/null || true
# Directories must be 755, files 644 (except executables)
find "$PKG_STAGE" -type d -exec chmod 755 {} \;
find "$PKG_STAGE" -type f ! -name "*.sh" \
                          ! -path "*/DEBIAN/*" \
                          ! -name "dupfinder" \
     -exec chmod 644 {} \;

ok "Staging area ready: $PKG_STAGE"

# ── Build .deb ────────────────────────────────────────────────────────────────
info "Building $DEB_FILE ..."
mkdir -p "$BUILD_DIR"
dpkg-deb --build --root-owner-group "$PKG_STAGE" "$BUILD_DIR/$DEB_FILE"

DEB_SIZE=$(du -sh "$BUILD_DIR/$DEB_FILE" | cut -f1)
ok "Built: $BUILD_DIR/$DEB_FILE ($DEB_SIZE)"

# ── Upload to Gitea ───────────────────────────────────────────────────────────
if [[ "$NO_UPLOAD" == "true" ]]; then
    echo ""
    echo "Skipping upload (--no-upload).  File is at:"
    echo "  $BUILD_DIR/$DEB_FILE"
    exit 0
fi

info "Uploading to Gitea package registry..."
# Gitea's Debian registry requires HTTP basic auth (user + token-as-password)
# and the literal /upload endpoint — token-bearer auth returns 405.
UPLOAD_URL="$GITEA_URL/api/packages/$GITEA_OWNER/debian/pool/$DISTRO/$COMPONENT/upload"

HTTP_STATUS=$(curl -s -o /tmp/gitea_upload_response.txt -w "%{http_code}" \
    -u "$GITEA_OWNER:$GITEA_TOKEN" \
    --upload-file "$BUILD_DIR/$DEB_FILE" \
    "$UPLOAD_URL")

if [[ "$HTTP_STATUS" == "201" || "$HTTP_STATUS" == "200" ]]; then
    ok "Uploaded successfully (HTTP $HTTP_STATUS)"
elif [[ "$HTTP_STATUS" == "409" ]]; then
    echo "    Package version $PKG_VERSION already exists in registry."
    echo "    Bump PKG_VERSION in this script to publish a new version."
else
    echo "    Upload failed (HTTP $HTTP_STATUS):"
    cat /tmp/gitea_upload_response.txt
    exit 1
fi

# ── Print install instructions ────────────────────────────────────────────────
echo ""
echo "╔══════════════════════════════════════════════════════════════════╗"
echo "║  Package published!  Install on any Ubuntu/Debian machine with: ║"
echo "╠══════════════════════════════════════════════════════════════════╣"
echo "║                                                                  ║"
echo "║  1. Add the repo:                                                ║"
echo "║     echo \"deb [trusted=yes] \\                                    ║"
echo "║       $GITEA_URL/api/packages/$GITEA_OWNER/debian \\             ║"
echo "║       $DISTRO $COMPONENT\" \\                                     ║"
echo "║       | sudo tee /etc/apt/sources.list.d/dupfinder.list          ║"
echo "║                                                                  ║"
echo "║  2. Install:                                                     ║"
echo "║     sudo apt update && sudo apt install dupfinder                ║"
echo "║                                                                  ║"
echo "║  3. Configure:                                                   ║"
echo "║     sudo dupfinder setup                                         ║"
echo "║                                                                  ║"
echo "╚══════════════════════════════════════════════════════════════════╝"
echo ""