#!/usr/bin/env bash
set -e

cd "$(dirname "$0")"

# ─── Colours ──────────────────────────────────────────────────────────────────
BOLD='\033[1m'
DIM='\033[2m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
RED='\033[0;31m'
CYAN='\033[0;36m'
RESET='\033[0m'

echo ""
echo -e "${BOLD}  Professor — AI Coding Tutor${RESET}"
echo -e "${DIM}  ─────────────────────────────${RESET}"
echo ""

# ─── Check Node ───────────────────────────────────────────────────────────────
if ! command -v node &>/dev/null; then
  echo -e "${RED}  ✗ Node.js is not installed. Please install Node.js 18+ and try again.${RESET}"
  exit 1
fi

NODE_VERSION=$(node -e "process.stdout.write(process.version.slice(1).split('.')[0])")
if [ "$NODE_VERSION" -lt 18 ]; then
  echo -e "${RED}  ✗ Node.js 18+ required (found v${NODE_VERSION}).${RESET}"
  exit 1
fi

# ─── Check npm deps ───────────────────────────────────────────────────────────
if [ ! -d "node_modules" ]; then
  echo -e "${YELLOW}  ⚙  node_modules not found — installing dependencies…${RESET}"
  npm install --silent
  echo -e "${GREEN}  ✓ Dependencies installed${RESET}"
else
  echo -e "${GREEN}  ✓ Dependencies ready${RESET}"
fi

# ─── Check .env.local ─────────────────────────────────────────────────────────
if [ ! -f ".env.local" ]; then
  echo -e "${YELLOW}  ⚠  .env.local not found — creating it now${RESET}"
  echo "ANTHROPIC_API_KEY=your_api_key_here" > .env.local
fi

ANTHROPIC_KEY=$(grep -E "^ANTHROPIC_API_KEY=" .env.local | cut -d= -f2- | tr -d '[:space:]')

if [ -z "$ANTHROPIC_KEY" ] || [ "$ANTHROPIC_KEY" = "your_api_key_here" ]; then
  echo ""
  echo -e "${YELLOW}  ⚠  No Anthropic API key found in .env.local${RESET}"
  echo -e "${DIM}     You can still use OpenRouter, LM Studio, or Ollama via the${RESET}"
  echo -e "${DIM}     provider settings in the app. To use Claude, add your key:${RESET}"
  echo ""
  echo -e "${DIM}     ANTHROPIC_API_KEY=sk-ant-…  →  .env.local${RESET}"
  echo ""
else
  echo -e "${GREEN}  ✓ Anthropic API key found${RESET}"
fi

# ─── Launch ───────────────────────────────────────────────────────────────────
PORT=${PORT:-3000}

echo ""
echo -e "${CYAN}  ➜  Starting dev server on http://localhost:${PORT}${RESET}"
echo -e "${DIM}     Press Ctrl+C to stop${RESET}"
echo ""

exec npm run dev -- --port "$PORT"