#!/usr/bin/env bash
set -euo pipefail

# Gitea Actions Runner Registration Script
# This script registers the runner with the Gitea instance

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

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

echo -e "${GREEN}Gitea Actions Runner Registration${NC}"
echo "======================================"

# Check if .env exists
if [ ! -f .env ]; then
    echo -e "${RED}Error: .env file not found${NC}"
    echo "Please copy .env.example to .env and configure it"
    echo ""
    echo "  cp .env.example .env"
    echo "  nano .env"
    echo ""
    exit 1
fi

# Load environment variables
set -a
source .env
set +a

# Validate required variables
if [ -z "${GITEA_INSTANCE_URL:-}" ]; then
    echo -e "${RED}Error: GITEA_INSTANCE_URL is not set in .env${NC}"
    exit 1
fi

if [ -z "${GITEA_RUNNER_REGISTRATION_TOKEN:-}" ]; then
    echo -e "${RED}Error: GITEA_RUNNER_REGISTRATION_TOKEN is not set in .env${NC}"
    echo ""
    echo "To get registration token:"
    echo "1. Go to Gitea: ${GITEA_INSTANCE_URL}/admin/actions/runners"
    echo "2. Click 'Create New Runner'"
    echo "3. Copy the registration token"
    echo "4. Add it to .env file"
    echo ""
    exit 1
fi

echo -e "${YELLOW}Configuration:${NC}"
echo "  Gitea URL: ${GITEA_INSTANCE_URL}"
echo "  Runner Name: ${GITEA_RUNNER_NAME:-dev-runner}"
echo "  Labels: ${GITEA_RUNNER_LABELS:-ubuntu-latest:docker://node:16-bullseye}"
echo ""

# Check if runner is already registered
if [ -f ./data/.runner ]; then
    echo -e "${YELLOW}Warning: Runner appears to be already registered${NC}"
    echo "Registration file exists at: ./data/.runner"
    echo ""
    read -p "Do you want to re-register? This will unregister the existing runner. (y/N): " -n 1 -r
    echo ""
    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
        echo "Registration cancelled"
        exit 0
    fi

    echo "Removing existing registration..."
    rm -f ./data/.runner
fi

# Create data directory if it doesn't exist
mkdir -p ./data

# Start services
echo ""
echo -e "${YELLOW}Starting services...${NC}"
docker compose up -d

# Wait for services to be ready
echo "Waiting for services to start..."
sleep 5

# Register runner
echo ""
echo -e "${YELLOW}Registering runner...${NC}"
docker compose exec -T gitea-runner act_runner register \
    --instance "${GITEA_INSTANCE_URL}" \
    --token "${GITEA_RUNNER_REGISTRATION_TOKEN}" \
    --name "${GITEA_RUNNER_NAME:-dev-runner}" \
    --labels "${GITEA_RUNNER_LABELS:-ubuntu-latest:docker://node:16-bullseye}"

if [ $? -eq 0 ]; then
    echo ""
    echo -e "${GREEN}✓ Runner registered successfully!${NC}"
    echo ""
    echo "Runner is now active and will start accepting jobs."
    echo ""
    echo "Useful commands:"
    echo "  docker compose logs -f gitea-runner    # View runner logs"
    echo "  docker compose restart gitea-runner    # Restart runner"
    echo "  docker compose down                    # Stop runner"
    echo ""
    echo "Check runner status in Gitea:"
    echo "  ${GITEA_INSTANCE_URL}/admin/actions/runners"
    echo ""
else
    echo ""
    echo -e "${RED}✗ Registration failed${NC}"
    echo "Check the logs for details:"
    echo "  docker compose logs gitea-runner"
    echo ""
    exit 1
fi