#!/bin/bash
set -euo pipefail

# ===========================================
# Startover IDC Server Setup Script
# Run once on the IDC server to initialize
# ===========================================

echo "=== Startover Server Setup ==="

# 1. Install Docker Compose V2 plugin
echo "[1/5] Installing Docker Compose V2 plugin..."
DOCKER_CONFIG=${DOCKER_CONFIG:-$HOME/.docker}
mkdir -p "$DOCKER_CONFIG/cli-plugins"
COMPOSE_VERSION=$(curl -s https://api.github.com/repos/docker/compose/releases/latest | grep '"tag_name"' | sed -E 's/.*"([^"]+)".*/\1/')
curl -SL "https://github.com/docker/compose/releases/download/${COMPOSE_VERSION}/docker-compose-linux-x86_64" -o "$DOCKER_CONFIG/cli-plugins/docker-compose"
chmod +x "$DOCKER_CONFIG/cli-plugins/docker-compose"
echo "Docker Compose $(docker compose version) installed."

# 2. Install Gitea Act Runner
echo "[2/5] Installing Gitea Act Runner..."
ACT_RUNNER_VERSION="0.2.11"
curl -SL "https://gitea.com/gitea/act_runner/releases/download/v${ACT_RUNNER_VERSION}/act_runner-${ACT_RUNNER_VERSION}-linux-amd64" -o /usr/local/bin/act_runner || {
    # Fallback: download to home dir if no sudo
    curl -SL "https://gitea.com/gitea/act_runner/releases/download/v${ACT_RUNNER_VERSION}/act_runner-${ACT_RUNNER_VERSION}-linux-amd64" -o "$HOME/act_runner"
    chmod +x "$HOME/act_runner"
    echo "act_runner installed to $HOME/act_runner"
}
chmod +x /usr/local/bin/act_runner 2>/dev/null || true
echo "Act Runner v${ACT_RUNNER_VERSION} installed."

# 3. Create app directory
echo "[3/5] Creating application directory..."
APP_DIR="$HOME/startover"
mkdir -p "$APP_DIR"
cd "$APP_DIR"

# 4. Generate runner config
echo "[4/5] Generating runner config..."
act_runner generate-config > "$APP_DIR/runner-config.yaml" 2>/dev/null || "$HOME/act_runner" generate-config > "$APP_DIR/runner-config.yaml" 2>/dev/null || true

# 5. Create systemd service for act_runner
echo "[5/5] Creating systemd service..."
RUNNER_BIN=$(which act_runner 2>/dev/null || echo "$HOME/act_runner")

sudo tee /etc/systemd/system/gitea-runner.service > /dev/null << SERVICEEOF
[Unit]
Description=Gitea Act Runner
After=network.target docker.service
Requires=docker.service

[Service]
Type=simple
User=$(whoami)
WorkingDirectory=${APP_DIR}
ExecStart=${RUNNER_BIN} daemon --config ${APP_DIR}/runner-config.yaml
Restart=always
RestartSec=10
Environment=DOCKER_HOST=unix:///var/run/docker.sock

[Install]
WantedBy=multi-user.target
SERVICEEOF

echo ""
echo "=== Setup Complete ==="
echo ""
echo "Next steps:"
echo "1. Register the runner with Gitea:"
echo "   cd $APP_DIR"
echo "   act_runner register \\"
echo "     --instance http://39.117.244.52:3000 \\"
echo "     --token <REGISTRATION_TOKEN> \\"
echo "     --name startover-runner \\"
echo "     --labels ubuntu-latest:host"
echo ""
echo "2. Start the runner service:"
echo "   sudo systemctl daemon-reload"
echo "   sudo systemctl enable gitea-runner"
echo "   sudo systemctl start gitea-runner"
echo ""
echo "3. Create .env.production in $APP_DIR:"
echo "   cp .env.production.example .env.production"
echo "   # Edit with real values"
echo ""
echo "4. Add secrets in Gitea repository settings:"
echo "   - DB_USER, DB_PASSWORD, DB_NAME"
echo "   - REDIS_PASSWORD"
echo "   - NEXTAUTH_URL, NEXTAUTH_SECRET"