#!/bin/bash
# =============================================================================
# deploy.sh — idempotent deploy for loreal-spec-tool
# Usage: bash /opt/loreal-spec-tool/deploy.sh
# =============================================================================
set -euo pipefail

APP_NAME="loreal-spec-tool"
REPO_DIR="/opt/${APP_NAME}"
WEB_DIR="/var/www/html/${APP_NAME}"
COMPOSE_FILE="${REPO_DIR}/docker-compose.yml"
STATIC_FILES=(index.html script.js specs.json)

GREEN='\033[0;32m'; YELLOW='\033[1;33m'; RED='\033[0;31m'; BOLD='\033[1m'; NC='\033[0m'
log()   { echo -e "${GREEN}[deploy]${NC} $1"; }
warn()  { echo -e "${YELLOW}[warn]${NC}   $1"; }
error() { echo -e "${RED}[error]${NC}  $1"; exit 1; }
step()  { echo -e "\n${BOLD}▶ $1${NC}"; }

compose() { docker compose -f "$COMPOSE_FILE" "$@"; }

step "Checking prerequisites"
command -v git    >/dev/null 2>&1 || error "git is not installed"
command -v docker >/dev/null 2>&1 || error "docker is not installed"
docker compose version >/dev/null 2>&1 || error "docker compose v2 not found"

step "Pulling latest code"
cd "$REPO_DIR"
git pull origin main
log "Code: $(git log -1 --format='%h %s')"

step "Building Docker image"
compose build --pull
log "Build complete"

step "Starting application"
compose up -d app
log "Container started"

step "Deploying static files to ${WEB_DIR}"
rm -rf "${WEB_DIR}"
mkdir -p "${WEB_DIR}"
for f in "${STATIC_FILES[@]}"; do
  if [ -f "${REPO_DIR}/${f}" ]; then
    cp "${REPO_DIR}/${f}" "${WEB_DIR}/${f}"
    log "  copied ${f}"
  else
    warn "  ${f} not found — skipped"
  fi
done

step "Health check"
sleep 2
HTTP_STATUS=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:3101/api/health || echo "000")
[ "$HTTP_STATUS" = "200" ] && log "API OK (HTTP 200)" || error "Health check failed (HTTP ${HTTP_STATUS})"

FIRST_RUN_FLAG="${REPO_DIR}/.deployed"
if [ ! -f "$FIRST_RUN_FLAG" ]; then
  touch "$FIRST_RUN_FLAG"
  echo ""
  echo -e "${BOLD}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
  echo -e "${BOLD}  First deploy. Add this to your Apache VirtualHost:${NC}"
  echo ""
  echo "    Alias /loreal-spec-tool /var/www/html/loreal-spec-tool"
  echo "    <Directory /var/www/html/loreal-spec-tool>"
  echo "        Options -Indexes"
  echo "        AllowOverride None"
  echo "        Require all granted"
  echo "    </Directory>"
  echo "    ProxyPass        /loreal-spec-tool/api http://localhost:3101/api"
  echo "    ProxyPassReverse /loreal-spec-tool/api http://localhost:3101/api"
  echo ""
  echo "  Then: sudo a2enmod proxy proxy_http && sudo systemctl reload apache2"
  echo -e "${BOLD}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
fi

echo ""
echo -e "${GREEN}${BOLD}Deploy complete${NC} — $(date '+%Y-%m-%d %H:%M:%S')"
echo -e "  App: http://localhost:3101  |  API: http://localhost:3101/api/health"
echo ""