#!/bin/bash

# Gitea Runner Setup Script
# Installiert und konfiguriert einen lokalen Gitea Runner

set -e

# Configuration
GITEA_URL="${GITEA_URL:-http://localhost:3000}"
RUNNER_NAME="${RUNNER_NAME:-portfolio-runner}"
RUNNER_LABELS="${RUNNER_LABELS:-ubuntu-latest,self-hosted,portfolio}"
RUNNER_WORK_DIR="${RUNNER_WORK_DIR:-/tmp/gitea-runner}"

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Logging function
log() {
    echo -e "${BLUE}[$(date +'%Y-%m-%d %H:%M:%S')]${NC} $1"
}

error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

success() {
    echo -e "${GREEN}[SUCCESS]${NC} $1"
}

warning() {
    echo -e "${YELLOW}[WARNING]${NC} $1"
}

# Check if running as root (skip in CI environments)
if [[ $EUID -eq 0 ]] && [[ -z "$CI" ]]; then
   error "This script should not be run as root (use CI=true to override)"
   exit 1
fi

log "🚀 Setting up Gitea Runner for Portfolio"

# Check if Gitea URL is accessible
log "🔍 Checking Gitea server accessibility..."
if ! curl -f "$GITEA_URL" > /dev/null 2>&1; then
    error "Cannot access Gitea server at $GITEA_URL"
    error "Please make sure Gitea is running and accessible"
    exit 1
fi
success "✅ Gitea server is accessible"

# Create runner directory
log "📁 Creating runner directory..."
mkdir -p "$RUNNER_WORK_DIR"
cd "$RUNNER_WORK_DIR"

# Download Gitea Runner
log "📥 Downloading Gitea Runner..."
RUNNER_VERSION="latest"
RUNNER_ARCH="linux-amd64"

# Get latest version
if [ "$RUNNER_VERSION" = "latest" ]; then
    RUNNER_VERSION=$(curl -s https://api.github.com/repos/woodpecker-ci/woodpecker/releases/latest | grep -o '"tag_name": "[^"]*' | grep -o '[^"]*$')
fi

RUNNER_URL="https://github.com/woodpecker-ci/woodpecker/releases/download/${RUNNER_VERSION}/woodpecker-agent_${RUNNER_VERSION}_${RUNNER_ARCH}.tar.gz"

log "Downloading from: $RUNNER_URL"
curl -L -o woodpecker-agent.tar.gz "$RUNNER_URL"

# Extract runner
log "📦 Extracting Gitea Runner..."
tar -xzf woodpecker-agent.tar.gz
chmod +x woodpecker-agent

success "✅ Gitea Runner downloaded and extracted"

# Create systemd service
log "⚙️ Creating systemd service..."
sudo tee /etc/systemd/system/gitea-runner.service > /dev/null <<EOF
[Unit]
Description=Gitea Runner for Portfolio
After=network.target

[Service]
Type=simple
User=$USER
WorkingDirectory=$RUNNER_WORK_DIR
ExecStart=$RUNNER_WORK_DIR/woodpecker-agent
Restart=always
RestartSec=5
Environment=WOODPECKER_SERVER=$GITEA_URL
Environment=WOODPECKER_AGENT_SECRET=
Environment=WOODPECKER_LOG_LEVEL=info

[Install]
WantedBy=multi-user.target
EOF

# Reload systemd
sudo systemctl daemon-reload

success "✅ Systemd service created"

# Instructions for manual registration
log "📋 Manual registration required:"
echo ""
echo "1. Go to your Gitea instance: $GITEA_URL"
echo "2. Navigate to: Settings → Actions → Runners"
echo "3. Click 'Create new Runner'"
echo "4. Copy the registration token"
echo "5. Run the following command:"
echo ""
echo "   cd $RUNNER_WORK_DIR"
echo "   ./woodpecker-agent register --server $GITEA_URL --token YOUR_TOKEN"
echo ""
echo "6. After registration, start the service:"
echo "   sudo systemctl enable gitea-runner"
echo "   sudo systemctl start gitea-runner"
echo ""
echo "7. Check status:"
echo "   sudo systemctl status gitea-runner"
echo ""

# Create helper scripts
log "📝 Creating helper scripts..."

# Start script
cat > "$RUNNER_WORK_DIR/start-runner.sh" << 'EOF'
#!/bin/bash
echo "Starting Gitea Runner..."
sudo systemctl start gitea-runner
sudo systemctl status gitea-runner
EOF

# Stop script
cat > "$RUNNER_WORK_DIR/stop-runner.sh" << 'EOF'
#!/bin/bash
echo "Stopping Gitea Runner..."
sudo systemctl stop gitea-runner
EOF

# Status script
cat > "$RUNNER_WORK_DIR/status-runner.sh" << 'EOF'
#!/bin/bash
echo "Gitea Runner Status:"
sudo systemctl status gitea-runner
echo ""
echo "Logs (last 20 lines):"
sudo journalctl -u gitea-runner -n 20 --no-pager
EOF

# Logs script
cat > "$RUNNER_WORK_DIR/logs-runner.sh" << 'EOF'
#!/bin/bash
echo "Gitea Runner Logs:"
sudo journalctl -u gitea-runner -f
EOF

chmod +x "$RUNNER_WORK_DIR"/*.sh

success "✅ Helper scripts created"

# Create environment file
cat > "$RUNNER_WORK_DIR/.env" << EOF
# Gitea Runner Configuration
GITEA_URL=$GITEA_URL
RUNNER_NAME=$RUNNER_NAME
RUNNER_LABELS=$RUNNER_LABELS
RUNNER_WORK_DIR=$RUNNER_WORK_DIR
EOF

log "📋 Setup Summary:"
echo "  • Runner Directory: $RUNNER_WORK_DIR"
echo "  • Gitea URL: $GITEA_URL"
echo "  • Runner Name: $RUNNER_NAME"
echo "  • Labels: $RUNNER_LABELS"
echo "  • Helper Scripts: $RUNNER_WORK_DIR/*.sh"
echo ""

log "🎯 Next Steps:"
echo "1. Register the runner in Gitea web interface"
echo "2. Enable and start the service"
echo "3. Test with a workflow run"
echo ""

success "🎉 Gitea Runner setup completed!"
log "📁 All files are in: $RUNNER_WORK_DIR"