#!/bin/sh
set -eu

TOKEN="${1:-}"

if [ -z "$TOKEN" ]; then
    echo "Error: Sentry404 Agent token is required."
    echo
    echo "Usage:"
    echo "curl -fsSL https://install.sentry404.com | sudo sh -s -- AGENT_TOKEN"
    exit 1
fi

if [ "$(id -u)" -ne 0 ]; then
    echo "Error: installer must be run as root."
    exit 1
fi

if ! command -v apt-get >/dev/null 2>&1; then
    echo "Error: currently only Ubuntu/Debian systems are supported."
    exit 1
fi

ARCH="$(dpkg --print-architecture)"

case "$ARCH" in
    amd64)
        ;;
    *)
        echo "Error: unsupported architecture: $ARCH"
        exit 1
        ;;
esac

echo "[1/6] Installing required packages..."

apt-get update -qq
apt-get install -y -qq ca-certificates curl

echo "[2/6] Configuring Sentry404 repository..."

install -m 0755 -d /etc/apt/keyrings

curl -fsSL \
    https://packages.sentry404.com/sentry404.asc \
    -o /etc/apt/keyrings/sentry404.asc

chmod a+r /etc/apt/keyrings/sentry404.asc

cat > /etc/apt/sources.list.d/sentry404.sources <<EOF
Types: deb
URIs: https://packages.sentry404.com/apt
Suites: stable
Components: main
Architectures: $ARCH
Signed-By: /etc/apt/keyrings/sentry404.asc
EOF

echo "[3/6] Installing Sentry404 Agent..."

apt-get update -qq
apt-get install -y sentry404-agent

echo "[4/6] Configuring Agent..."

install -m 0700 -d /etc/sentry404

cat > /etc/sentry404/agent.env <<EOF
SENTRY404_COLLECTOR_URL=https://collector.sentry404.com
SENTRY404_AGENT_TOKEN=$TOKEN
EOF

chmod 600 /etc/sentry404/agent.env

echo "[5/6] Starting Agent..."

systemctl daemon-reload
systemctl enable sentry404-agent.service >/dev/null 2>&1
systemctl restart sentry404-agent.service

echo "[6/6] Verifying installation..."

sleep 2

if systemctl is-active --quiet sentry404-agent.service; then
    echo
    echo "Sentry404 Agent installed successfully."
else
    echo
    echo "Error: Sentry404 Agent failed to start."
    echo "Check logs with:"
    echo "  journalctl -u sentry404-agent -n 100 --no-pager"
    exit 1
fi