#!/bin/bash
# ================================================================
#  install-gitea-runner.sh
#  Installation automatisée d'un runner Gitea Actions
#
#  Usage:
#    ./install-gitea-runner.sh <TOKEN> <NAME> <LABELS>
#
#  Exemple:
#    ./install-gitea-runner.sh abc123 "dev-lab" "self-hosted,lab,docker,obsigate"
# ================================================================
set -e

TOKEN="$1"
NAME="$2"
LABELS="$3"

if [ -z "$TOKEN" ] || [ -z "$NAME" ] || [ -z "$LABELS" ]; then
    echo "❌ Usage: ./install-gitea-runner.sh <TOKEN> <NAME> <LABELS>"
    echo "   Example: ./install-gitea-runner.sh abc123 dev-lab 'self-hosted,lab,docker,obsigate'"
    exit 1
fi

echo "============================================="
echo "  Gitea Runner Installer"
echo "  Server : $NAME"
echo "  Labels : $LABELS"
echo "============================================="
echo ""

# ── 1. Detect OS ─────────────────────────────────────────────────
if [ -f /etc/alpine-release ]; then
    OS="alpine"
elif [ -f /etc/debian_version ]; then
    OS="debian"
elif [ -f /etc/arch-release ]; then
    OS="arch"
else
    echo "⚠️  Unknown OS — assuming Debian-based"
    OS="debian"
fi
echo "🖥️  Detected OS: $OS"

# ── 2. Ensure Docker ─────────────────────────────────────────────
echo "[1/4] Checking Docker..."
if ! command -v docker &>/dev/null; then
    echo "   Installing Docker..."
    if [ "$OS" = "alpine" ]; then
        apk add --no-cache docker curl
        rc-update add docker boot
        service docker start
    elif [ "$OS" = "debian" ]; then
        sudo apt-get update -qq
        sudo apt-get install -y -qq docker.io curl
        sudo usermod -aG docker "$USER"
    elif [ "$OS" = "arch" ]; then
        sudo pacman -S --noconfirm docker curl
        sudo systemctl enable --now docker
        sudo usermod -aG docker "$USER"
    fi
fi
echo "   ✅ Docker OK"

# ── 3. Download & install runner ──────────────────────────────────
echo "[2/4] Downloading Gitea act_runner..."
ARCH=$(uname -m)
case "$ARCH" in
    x86_64)  RUNNER_ARCH="amd64" ;;
    aarch64) RUNNER_ARCH="arm64" ;;
    armv7l)  RUNNER_ARCH="armv7" ;;
    *)       echo "❌ Unsupported architecture: $ARCH"; exit 1 ;;
esac

RUNNER_URL="https://dl.gitea.com/act_runner/act_runner-linux-${RUNNER_ARCH}"
sudo curl -sL -o /usr/local/bin/act_runner "$RUNNER_URL"
sudo chmod +x /usr/local/bin/act_runner
echo "   ✅ act_runner installed ($(/usr/local/bin/act_runner --version 2>&1 | head -1))"

# ── 4. Register ───────────────────────────────────────────────────
echo "[3/4] Registering runner with Gitea..."
/usr/local/bin/act_runner register \
    --instance https://git.dracodev.net \
    --token "$TOKEN" \
    --name "$NAME" \
    --labels "$LABELS" \
    --no-interactive
echo "   ✅ Runner registered"

# ── 5. Install as service ────────────────────────────────────────
echo "[4/4] Installing as system service..."

if [ "$OS" = "alpine" ]; then
    # Alpine OpenRC
    sudo tee /etc/init.d/gitea-runner > /dev/null <<EOF
#!/sbin/openrc-run
name="Gitea Actions Runner ($NAME)"
command="/usr/local/bin/act_runner"
command_args="daemon"
command_background=true
pidfile="/run/\${RC_SVCNAME}.pid"
output_log="/var/log/gitea-runner.log"
error_log="/var/log/gitea-runner.log"
EOF
    sudo chmod +x /etc/init.d/gitea-runner
    sudo rc-update add gitea-runner default
    sudo service gitea-runner start
else
    # Systemd (Debian, Arch)
    sudo tee /etc/systemd/system/gitea-runner.service > /dev/null <<EOF
[Unit]
Description=Gitea Actions Runner ($NAME)
After=network.target docker.service
Requires=docker.service

[Service]
ExecStart=/usr/local/bin/act_runner daemon
Restart=always
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF
    sudo systemctl daemon-reload
    sudo systemctl enable --now gitea-runner
fi
echo "   ✅ Service installed and started"

# ── 6. Verify ─────────────────────────────────────────────────────
echo ""
sleep 2
if [ "$OS" = "alpine" ]; then
    sudo service gitea-runner status 2>&1 | head -3
else
    sudo systemctl status gitea-runner --no-pager -l 2>&1 | head -5
fi

echo ""
echo "============================================="
echo "  ✅ Runner '$NAME' installed successfully!"
echo "  Labels : $LABELS"
echo "  Vérifier dans Gitea → Admin → Runners"
echo "============================================="