#!/usr/bin/env bash
#
# FuelAlert deploy script — run on the VPS from the project root:
#
#   ./deploy.sh            # deploy the latest main
#   ./deploy.sh v0.1.3     # deploy a specific tag
#
# It puts the site in maintenance mode, updates the code, runs migrations and
# cache rebuilds, restarts the queue, then brings the site back up. composer
# install and npm build only run when their inputs actually changed, so most
# deploys skip them. If any step fails the script aborts and the site stays in
# maintenance mode on purpose — fix the issue, then re-run.
#
# See docs/ops/deployment.md for first-time setup and troubleshooting.
set -euo pipefail

cd "$(dirname "$0")"

REF="${1:-main}"
echo "==> Deploying ref: ${REF}"

# Remember the current commit so we can see what changed after checkout.
BEFORE="$(git rev-parse HEAD)"

echo "==> Maintenance mode on"
php artisan down --retry=15

git fetch --tags --prune origin
git checkout "${REF}"

# Fast-forward to the remote only when on a branch (a tag leaves a detached HEAD).
if git symbolic-ref -q HEAD >/dev/null; then
    git pull --ff-only
fi

AFTER="$(git rev-parse HEAD)"
CHANGED="$(git diff --name-only "${BEFORE}" "${AFTER}" || true)"

# Reinstall PHP deps only if the lockfile moved.
if grep -q '^composer\.lock$' <<<"${CHANGED}"; then
    echo "==> composer.lock changed — installing PHP deps"
    composer install --no-dev --optimize-autoloader
else
    echo "==> composer.lock unchanged — skipping composer install"
fi

# Rebuild the Vue SPA only if frontend sources or the JS lockfile moved.
if grep -qE '^(package(-lock)?\.json|vite\.config\.|resources/(js|css)/)' <<<"${CHANGED}"; then
    echo "==> Frontend changed — rebuilding SPA"
    npm ci
    npm run build
else
    echo "==> No frontend changes — skipping npm build"
fi

echo "==> Running migrations"
php artisan migrate --force

echo "==> Rebuilding caches"
php artisan config:cache
php artisan route:cache
php artisan view:cache
php artisan event:cache

echo "==> Restarting queue workers"
php artisan queue:restart

echo "==> Maintenance mode off"
php artisan up

echo "==> Deploy complete"
php artisan about