#!/usr/bin/env bash
# Run this ON the server, from the cloned repo root (e.g. /opt/salary-benchmark).
# Assumes you've already created .env with your API keys. Idempotent.

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"

URL_SUBPATH="${URL_SUBPATH:-/salary-benchmark/}"
WEB_DIR="${WEB_DIR:-/var/www/html/salary-benchmark}"
VHOST_FILE="${VHOST_FILE:-/etc/apache2/sites-enabled/optical-dev.oliver.solutions.conf}"
PORT_SCAN_START="${PORT_SCAN_START:-8100}"
PORT_SCAN_END="${PORT_SCAN_END:-8199}"

# Pin compose project name. Defaulting to the parent dir name gives every app on
# this server the same project ("deploy"), sharing container + volume namespaces
# and causing cross-app data loss. Belt-and-braces with `name:` in the yaml.
COMPOSE_PROJECT="salary-benchmark"
DC="docker compose -p ${COMPOSE_PROJECT} -f docker-compose.prod.yml --env-file .env.prod"

step() { printf "\n\033[1;33m==> %s\033[0m\n" "$*"; }
info() { printf "    %s\n" "$*"; }
die()  { printf "\033[1;31mERROR: %s\033[0m\n" "$*" >&2; exit 1; }

[[ $EUID -eq 0 ]] || die "run as root (for apache + /var/www writes)"
command -v docker >/dev/null || die "docker not installed"
command -v apache2ctl >/dev/null || die "apache2ctl not found — is Apache installed?"
[[ -e "${VHOST_FILE}" ]] || die "vhost file not found: ${VHOST_FILE}"
# Follow symlink so we edit the real file (sites-enabled is often a symlink)
VHOST_FILE="$(readlink -f "${VHOST_FILE}")"
info "vhost: ${VHOST_FILE}"
[[ -f "${REPO_ROOT}/.env" ]] || die ".env missing in ${REPO_ROOT} (copy .env.example and fill in API keys)"

# ----------------------------------------------------------------------------
step "Pick free port in ${PORT_SCAN_START}-${PORT_SCAN_END}"
USED=$(ss -tlnH 2>/dev/null | awk '{print $4}' | awk -F: '{print $NF}' | sort -u)
APP_PORT=""
for p in $(seq "${PORT_SCAN_START}" "${PORT_SCAN_END}"); do
    if ! grep -qx "${p}" <<<"${USED}"; then APP_PORT="${p}"; break; fi
done
[[ -n "${APP_PORT}" ]] || die "no free port in range"
info "APP_PORT=${APP_PORT}"

# ----------------------------------------------------------------------------
step "Build frontend (VITE_BASE=${URL_SUBPATH}) in a node container"
docker run --rm \
    -v "${REPO_ROOT}/frontend":/app \
    -w /app \
    -e VITE_BASE="${URL_SUBPATH}" \
    node:20-alpine \
    sh -c "npm ci --prefer-offline --no-audit --no-fund && npm run build"
info "built ${REPO_ROOT}/frontend/dist/"

# ----------------------------------------------------------------------------
step "Deploy frontend to ${WEB_DIR}"
mkdir -p "${WEB_DIR}"
rsync -a --delete "${REPO_ROOT}/frontend/dist/" "${WEB_DIR}/"

# ----------------------------------------------------------------------------
step "Write .env.prod (preserves existing JWT_SECRET and DB_PASSWORD)"
cd "${REPO_ROOT}"
ENVF="deploy/.env.prod"
EXISTING_JWT=""; EXISTING_DBPW=""
if [[ -f "${ENVF}" ]]; then
    EXISTING_JWT=$(grep -E '^JWT_SECRET=' "${ENVF}" | cut -d= -f2- || true)
    EXISTING_DBPW=$(grep -E '^DB_PASSWORD=' "${ENVF}" | cut -d= -f2- || true)
fi
JWT_SECRET="${EXISTING_JWT:-$(openssl rand -hex 32)}"
DB_PASSWORD="${EXISTING_DBPW:-$(openssl rand -hex 16)}"

get_env() { grep -E "^${1}=" .env 2>/dev/null | head -1 | cut -d= -f2- || true; }
SERPER_API_KEY=$(get_env SERPER_API_KEY)
FIRECRAWL_API_KEY=$(get_env FIRECRAWL_API_KEY)
COHERE_API_KEY=$(get_env COHERE_API_KEY)
ANTHROPIC_API_KEY=$(get_env ANTHROPIC_API_KEY)

cat > "${ENVF}" <<ENV
# Generated by deploy-local.sh — do not commit
APP_PORT=${APP_PORT}

DB_USER=salary_user
DB_PASSWORD=${DB_PASSWORD}
DB_HOST=db
DB_PORT=5432
DB_NAME=salary_benchmark

JWT_SECRET=${JWT_SECRET}
JWT_ALGORITHM=HS256
JWT_EXPIRES_MINUTES=480

SERPER_API_KEY=${SERPER_API_KEY}
FIRECRAWL_API_KEY=${FIRECRAWL_API_KEY}
COHERE_API_KEY=${COHERE_API_KEY}
ANTHROPIC_API_KEY=${ANTHROPIC_API_KEY}
ENV
chmod 600 "${ENVF}"
info "wrote ${REPO_ROOT}/${ENVF}"

# ----------------------------------------------------------------------------
step "Build & start containers (project=${COMPOSE_PROJECT})"
cd "${REPO_ROOT}/deploy"
${DC} build
${DC} up -d
${DC} ps
cd "${REPO_ROOT}"

# ----------------------------------------------------------------------------
step "Install Apache fragment"
FRAG_DST="${REPO_ROOT}/deploy/apache-salary-benchmark.conf"
sed "s|__APP_PORT__|${APP_PORT}|g" \
    "${REPO_ROOT}/deploy/apache-salary-benchmark.conf.template" > "${FRAG_DST}"
info "rendered ${FRAG_DST}"

INCLUDE_LINE="    Include ${FRAG_DST}"
if grep -Fq "${FRAG_DST}" "${VHOST_FILE}"; then
    info "Include already present in ${VHOST_FILE}"
else
    cp -a "${VHOST_FILE}" "${VHOST_FILE}.bak.$(date +%s)"
    sed -i "0,/<\/VirtualHost>/s|</VirtualHost>|${INCLUDE_LINE}\n</VirtualHost>|" "${VHOST_FILE}"
    info "added Include line to ${VHOST_FILE}"
fi

apache2ctl configtest
systemctl reload apache2
info "Apache reloaded"

# ----------------------------------------------------------------------------
step "Verify"
sleep 3
HEALTH_URL="https://optical-dev.oliver.solutions${URL_SUBPATH}api/health"
if curl -sfk "${HEALTH_URL}" >/dev/null; then
    info "OK: ${HEALTH_URL}"
else
    info "WARN: health check failed (container may still be starting). Try:"
    info "  (cd ${REPO_ROOT}/deploy && ${DC} logs app --tail 30)"
fi

step "Done"
info "App:   https://optical-dev.oliver.solutions${URL_SUBPATH}"
info "Login: admin@oliver.agency / Oliver2026!"
info "Port:  127.0.0.1:${APP_PORT} (Apache fronts it)"