#!/usr/bin/env nix-shell
#!nix-shell -i bash ../../shell.nix
# shellcheck shell=bash
set -Eeuo pipefail
cd "$(dirname "${BASH_SOURCE[0]}")"
cd ../../

VPS_COMMIT_SHA="$(git rev-parse HEAD)"
export VPS_COMMIT_SHA

mail_debug_log() {
  echo "Sending logs via email..."
  ./scripts/ci/mail.sh "${VPS_COMMIT_SHA}"
  echo "Done."
}
trap mail_debug_log EXIT

create_known_hosts_file() {
  echo "${TLD},$(terraform output public_floating_ip) ssh-rsa $(awk '{print $2}' < ./secrets/ssh/vps-box-server.pub)" > ./generated-known-hosts.txt
}

setup_borg_files() {
  local -r template_file="${1}"
  local -r destination_name="${2}"
  scp ./secrets/borg/borg-remote.pub "$TLD":/root/.ssh/id_rsa.pub
  scp ./secrets/borg/borg-remote     "$TLD":/root/.ssh/id_rsa
  scp ./secrets/borg/known-hosts.txt "$TLD":/root/.ssh/known_hosts
  ssh "$TLD" 'chmod 400 /root/.ssh/id_rsa'
  # shellcheck disable=SC2029
  envsubst < "${template_file}" | ssh "$TLD" "cat > /home/vps/${destination_name} && chmod +x /home/vps/${destination_name}"
  # shellcheck disable=SC2029
  ssh "$TLD" "chmod +x /home/vps/${destination_name}"
}

echo "Shutting down running containers and backing up data..."
create_known_hosts_file
ssh "$TLD" "cd /home/vps/ && docker-compose down"
setup_borg_files ./scripts/box/create-backup.env.sh create-backup.sh
ssh "$TLD" /home/vps/create-backup.sh 2>&1 > ./logs/borg-create.txt
echo "Done."

echo "Initializing Terraform..."
terraform --version
terraform init
echo "Done."

if [[ "${DESTROY_VOLUME:-}" != "" ]]; then
  echo "Destroying existing infrastructure..."
  terraform destroy -input=false -auto-approve
else
  echo "Skipping explicit intentional destruction of existing infrastructure..."
fi
echo "Done."

echo "Running 'terraform plan' and storing the planfile..."
mkdir -p "../vps-state/secrets/plan-files/"
PLAN_FILE_NAME="$(date -Iseconds)-$VPS_COMMIT_SHA.tfplan"
PLAN_FILE_PATH="../vps-state/secrets/plan-files/$PLAN_FILE_NAME"
terraform plan -input=false -out="$PLAN_FILE_PATH"
pushd ../vps-state/
git add "secrets/plan-files/$PLAN_FILE_NAME"
git commit -m "CI: add .tfplan plan file for CI run $VPS_COMMIT_SHA"
git push origin master
popd
echo "Done."

echo "Running 'terraform apply'..."
terraform apply -input=false -auto-approve "$PLAN_FILE_PATH"
echo "Done."

echo "Storing .tfstate file..."
pushd ../vps-state/
git add secrets/terraform.tfstate secrets/terraform.tfstate.backup
git commit -m "CI: update Terraform .tfstate files for CI run $VPS_COMMIT_SHA"
git push origin master
popd
echo "Done."

echo "Running the Ansible playbook..."
create_known_hosts_file
ansible-playbook -vvv provision.yaml 2>&1 > ./logs/ansible.txt
echo "Done."

echo "Locking git-crypt repositories back..."
git crypt lock
pushd ../vps-state/
git crypt lock
popd
echo "Done."