#!/bin/bash
set -ex

if [ "$EUID" -ne 0 ]; then
    echo "error: this script must be run as root" >&2
    exit 1
fi

RELEASE="$1"
INSTALLER="$2"

THIS_DIR="$(dirname "$(readlink -f "$0")")"

BASE_CONTAINER_NAME=zulip-install-"$RELEASE"-base
if ! lxc-info -n "$BASE_CONTAINER_NAME" >/dev/null 2>&1; then
    "$THIS_DIR"/prepare-base "$RELEASE"
fi

while [ -z "$CONTAINER_NAME" ] || lxc-info -n "$CONTAINER_NAME" >/dev/null 2>&1; do
    CONTAINER_NAME="$(mktemp -u zulip-install-"$RELEASE"-XXXXX)"
done

lxc-copy --ephemeral --keepdata -n "$BASE_CONTAINER_NAME" -N "$CONTAINER_NAME"

run() {
    lxc-attach -n "$CONTAINER_NAME" -- "$@"
}

# Wait for the container to boot, polling.
ok=
for i in {1..60}; do
    runlevel="$(run runlevel 2>/dev/null)" || { sleep 1; continue; }
    if [ "$runlevel" != "${0%[0-9]}" ]; then
        ok=1
        break
    fi
    sleep 1
done
if [ -z "ok" ]; then
    echo "error: timeout waiting for container to boot" >&2
    exit 1
fi

# TODO kill this with an installer flag
run apt-get install -y openssl ssl-cert
run ln -nsf /etc/ssl/certs/ssl-cert-snakeoil.pem /etc/ssl/certs/zulip.combined-chain.crt
run ln -nsf /etc/ssl/private/ssl-cert-snakeoil.key /etc/ssl/private/zulip.key

# TODO make this a proper dep -- else
# /tmp/zulip-server-1.7.1/scripts/lib/../../scripts/lib/third/install-yarn.sh: line 43: curl: command not found
run apt-get install -y curl

<"$INSTALLER" run dd of=/tmp/zulip-server.tar.gz
run tar -xf /tmp/zulip-server.tar.gz -C /tmp/
run sh -c '/tmp/zulip-server-*/scripts/setup/install'
# TODO install ends as a zombie (workaround: `sudo ps aux | grep lxc-attach`, kill that)

# TODO settings.py, initialize-database, create realm

# TODO eatmydata, for speed