#!/bin/sh
# dev.sh — Start Docker backend + local Vite web dev server
#
# Usage:
#   ./scripts/dev.sh              # uses backend/.env for backend, web/.env.local for Vite
#   REBUILD=1 ./scripts/dev.sh    # force Docker rebuild before starting
#
# Requires:
#   - Docker running
#   - pnpm installed
#   - backend/.env populated (copy from backend/.env.example)
#   - web/.env.local populated (copy from web/.env.example)
#
# Ports:
#   Backend  → http://localhost:4018
#   Web      → http://localhost:5173  (Vite default)

set -eu

ROOT="$(cd "$(dirname "$0")/.." && pwd)"

# ---------------------------------------------------------------------------
# Colour helpers (skip if not a TTY)
# ---------------------------------------------------------------------------
if [ -t 1 ]; then
  BOLD='\033[1m'; CYAN='\033[0;36m'; GREEN='\033[0;32m'; YELLOW='\033[0;33m'; RESET='\033[0m'
else
  BOLD=''; CYAN=''; GREEN=''; YELLOW=''; RESET=''
fi

log()  { printf "${CYAN}[dev]${RESET} %s\n" "$*"; }
ok()   { printf "${GREEN}[dev]${RESET} %s\n" "$*"; }
warn() { printf "${YELLOW}[dev]${RESET} %s\n" "$*"; }

# ---------------------------------------------------------------------------
# Pre-flight checks
# ---------------------------------------------------------------------------
if ! docker info >/dev/null 2>&1; then
  printf "Error: Docker is not running.\n" >&2
  exit 1
fi

if [ ! -f "$ROOT/backend/.env" ]; then
  warn "backend/.env not found — copy backend/.env.example and fill in credentials."
  warn "  cp backend/.env.example backend/.env"
  exit 1
fi

if [ ! -f "$ROOT/web/.env.local" ]; then
  warn "web/.env.local not found — creating from web/.env.example with defaults."
  cp "$ROOT/web/.env.example" "$ROOT/web/.env.local"
fi

# ---------------------------------------------------------------------------
# Cleanup on exit — always stop the backend container
# ---------------------------------------------------------------------------
cleanup() {
  log "Shutting down backend container..."
  cd "$ROOT"
  docker compose stop backend >/dev/null 2>&1 || true
}
trap cleanup INT TERM EXIT

# ---------------------------------------------------------------------------
# Start backend in Docker (backend service only, not web)
# ---------------------------------------------------------------------------
cd "$ROOT"

BUILD_FLAG=""
if [ "${REBUILD:-}" = "1" ]; then
  BUILD_FLAG="--build"
  log "Rebuilding backend Docker image..."
fi

log "Starting backend container..."
# Run detached; logs are tailed below
docker compose up backend --detach $BUILD_FLAG

# ---------------------------------------------------------------------------
# Wait for backend health
# ---------------------------------------------------------------------------
log "Waiting for backend to become healthy..."
ATTEMPTS=0
MAX_ATTEMPTS=30
until docker compose exec -T backend wget -qO- http://localhost:4018/health/live >/dev/null 2>&1; do
  ATTEMPTS=$((ATTEMPTS + 1))
  if [ "$ATTEMPTS" -ge "$MAX_ATTEMPTS" ]; then
    printf "Error: backend did not become healthy after %s attempts.\n" "$MAX_ATTEMPTS" >&2
    docker compose logs --tail=40 backend >&2
    exit 1
  fi
  sleep 2
done
ok "Backend healthy at http://localhost:4018"

# ---------------------------------------------------------------------------
# Tail backend logs in background
# ---------------------------------------------------------------------------
docker compose logs --follow --tail=20 backend &
LOGS_PID=$!

# ---------------------------------------------------------------------------
# Start Vite web dev server (foreground — Ctrl+C stops everything via trap)
# ---------------------------------------------------------------------------
log "Starting Vite web dev server..."
printf "\n${BOLD}  Web  → http://localhost:5173${RESET}\n"
printf "${BOLD}  API  → http://localhost:4018${RESET}\n\n"

cd "$ROOT/web"
pnpm dev

# Kill log tail if Vite exits cleanly
kill "$LOGS_PID" 2>/dev/null || true