#!/bin/bash
# ==============================================================================================
# ============================= build.sh =======================================================
# ==============================================================================================
#
# PURPOSE
# ─────────────────────────────────────────────────────────────────────────────
# Packages the plugin web files (Plugin/unraid/) into a Slackware .txz, the
# format unRAID re-installs from flash on every boot. This is the RELEASE path —
# for day-to-day development use plugin_setup.sh (symlink, instant edits).
#
# What it produces (in Plugin/dist/):
#   varaverk-<version>-noarch-1.txz   the package unRAID installs to
#                                     /usr/local/emhttp/plugins/varaverk/
#   varaverk-<version>-noarch-1.txz.sha256
#
# It also rewrites the <!ENTITY version> and <!ENTITY sha256> lines in
# Plugin/varaverk.plg so the .plg always points at the package just built.
#
# WHY a .txz (not the dev symlink):
#   rc.local runs `plugin install` on every .plg at boot, BEFORE the array
#   mounts. A symlink into /mnt/user/appdata can't be made that early (appdata
#   isn't mounted) and the disks_mounted event hooks live behind that missing
#   symlink — chicken-and-egg. A .txz lives on flash, so unRAID extracts it to
#   RAM before the array starts; the event hooks are then present in time to
#   rebuild cron when the array mounts. Scripts stay on appdata (git clone).
#
# ==============================================================================================
# USAGE
# ==============================================================================================
#   ./build.sh                 # version = today's date (YYYY.MM.DD)
#   ./build.sh 2026.09.01       # explicit version
#
# After building: commit Plugin/dist/<txz> + the updated .plg, then attach the
# .txz to a GitHub release tagged <version> so the .plg URL resolves for
# downloaders. (The .plg also works offline if the .txz is already cached on
# flash with a matching SHA256.)
# ==============================================================================================

set -euo pipefail

PLUGIN_NAME="varaverk"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
SRC="$SCRIPT_DIR/unraid"
DIST="$SCRIPT_DIR/dist"
PLG="$SCRIPT_DIR/varaverk.plg"

VERSION="${1:-$(date +%Y.%m.%d)}"
PKG_BASENAME="${PLUGIN_NAME}-${VERSION}-noarch-1"
OUTFILE="$DIST/${PKG_BASENAME}.txz"

# ── Guards ──────────────────────────────────────────────────────────────────
[[ -d "$SRC" ]]            || { echo "ERROR: source not found: $SRC"; exit 1; }
command -v makepkg >/dev/null || { echo "ERROR: makepkg not found (run on unRAID)"; exit 1; }

mkdir -p "$DIST"

# ── Stage files under the real install path ─────────────────────────────────
# installpkg extracts relative to / so the package must contain the full path.
STAGE="$(mktemp -d)"
trap 'rm -rf "$STAGE"' EXIT
INSTALL_ROOT="$STAGE/usr/local/emhttp/plugins/$PLUGIN_NAME"
mkdir -p "$INSTALL_ROOT"

# Copy web files; drop VCS/editor cruft and any dev-only leftovers.
cp -a "$SRC/." "$INSTALL_ROOT/"
find "$INSTALL_ROOT" -name '.git*' -prune -exec rm -rf {} + 2>/dev/null || true
find "$INSTALL_ROOT" -name '*.swp' -delete 2>/dev/null || true

# Normalise ownership/permissions inside the package.
chown -R root:root "$STAGE" 2>/dev/null || true
find "$INSTALL_ROOT" -type d -exec chmod 0755 {} +
find "$INSTALL_ROOT" -type f -exec chmod 0644 {} +
# Keep shell/event scripts executable.
find "$INSTALL_ROOT" \( -name '*.sh' -o -path '*/event/*' \) -type f -exec chmod 0755 {} +

# ── Build the package ───────────────────────────────────────────────────────
# makepkg doesn't quote its output arg internally, so build to a space-free temp
# path (the repo lives under a dir with spaces) then move into dist/.
TMP_OUT="$STAGE.txz"
( cd "$STAGE" && makepkg -l y -c y "$TMP_OUT" >/dev/null )
mv "$TMP_OUT" "$OUTFILE"

# ── Hash + record ───────────────────────────────────────────────────────────
SHA256="$(sha256sum "$OUTFILE" | awk '{print $1}')"
echo "$SHA256  ${PKG_BASENAME}.txz" > "$OUTFILE.sha256"

# ── Point the .plg at this build ────────────────────────────────────────────
if [[ -f "$PLG" ]]; then
    sed -i -E "s|(<!ENTITY[[:space:]]+version[[:space:]]+\")[^\"]*(\">)|\1${VERSION}\2|" "$PLG"
    sed -i -E "s|(<!ENTITY[[:space:]]+sha256[[:space:]]+\")[^\"]*(\">)|\1${SHA256}\2|"  "$PLG"
fi

SIZE="$(numfmt --to=iec "$(stat -c %s "$OUTFILE")")"
cat <<EOF

  Built:   $OUTFILE  ($SIZE)
  Version: $VERSION
  SHA256:  $SHA256

  .plg updated (version + sha256).

  Next:
    1) git add Plugin/dist/${PKG_BASENAME}.txz* Plugin/varaverk.plg && commit
    2) Create GitHub release tagged "$VERSION", attach ${PKG_BASENAME}.txz
       (skip for a local/offline install — copy the .txz to
        /boot/config/plugins/$PLUGIN_NAME/ and the .plg uses the cached copy)
EOF