#!/usr/bin/env bash
# Proves scripts/ci-sweep.sh against real Docker resources: what it removes, and above all what it
# leaves alone. CI runs it before trusting the sweep with a shared runner's daemon.
#
#   bash scripts/test-ci-sweep.sh
#
# Every resource it creates is named and labeled for this run alone, under fake run identifiers, so
# it can never touch a real stack; and it removes all of them on exit, whatever happens.

set -Eeuo pipefail

repository_root="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
cd "$repository_root"

image="$(sed -n 's/^[[:space:]]*image: \(postgres:[^[:space:]]*\)$/\1/p' deploy/compose.yaml | head -1)"
[[ -n "$image" ]] || {
  echo "test-ci-sweep: no pinned PostgreSQL image in deploy/compose.yaml." >&2
  exit 1
}
docker image inspect "$image" >/dev/null 2>&1 || docker pull --quiet "$image" >/dev/null

nonce="$(openssl rand -hex 4)"
compose_label="com.docker.compose.project"
ci_label="org.riverofglorymn.ekklesia.ci.project"
failures=0
created=()

check() {
  if eval "$1"; then
    echo "ok   $2"
  else
    echo "FAIL $2"
    failures=$((failures + 1))
  fi
}

# project_exists <project>: any container, network, volume, or image still carries its label.
project_exists() {
  local project="$1"
  [[ -n "$(
    docker ps --all --quiet --filter "label=${compose_label}=${project}"
    docker ps --all --quiet --filter "label=${ci_label}=${project}"
    docker network ls --quiet --filter "label=${compose_label}=${project}"
    docker volume ls --quiet --filter "label=${compose_label}=${project}"
    docker image ls --quiet --filter "label=${ci_label}=${project}"
  )" ]]
}

staging_exists() {
  docker run --rm --entrypoint test -v /tmp:/host-tmp "$image" -d "/host-tmp/$1"
}

# make_stack <project>: what a CI script leaves behind when it is killed: a Compose-labeled network,
# volume, and running container; a CI-labeled container and image; and a staging directory on the
# Docker host.
make_stack() {
  local project="$1"
  created+=("$project")
  docker network create --label "${compose_label}=${project}" "${project}_default" >/dev/null
  docker volume create --label "${compose_label}=${project}" "${project}_data" >/dev/null
  docker run --detach --name "${project}-db" --label "${compose_label}=${project}" \
    --network "${project}_default" -v "${project}_data:/data" --entrypoint sleep "$image" 600 >/dev/null
  docker run --detach --name "${project}-browser" --label "${ci_label}=${project}" \
    --entrypoint sleep "$image" 600 >/dev/null
  printf 'FROM %s\nLABEL %s=%s\n' "$image" "$ci_label" "$project" |
    docker build --quiet --tag "${project}-image:test" - >/dev/null
  docker run --rm --entrypoint mkdir -v /tmp:/host-tmp "$image" -p "/host-tmp/${project}"
}

job_container="test-ci-sweep-job-${nonce}"
cleanup() {
  local status=$?
  trap - EXIT INT TERM
  docker rm --force "$job_container" >/dev/null 2>&1 || true
  for project in "${created[@]}"; do
    docker ps --all --quiet --filter "label=${compose_label}=${project}" | xargs -r docker rm --force >/dev/null 2>&1 || true
    docker ps --all --quiet --filter "label=${ci_label}=${project}" | xargs -r docker rm --force >/dev/null 2>&1 || true
    docker network rm "${project}_default" >/dev/null 2>&1 || true
    docker volume rm --force "${project}_data" >/dev/null 2>&1 || true
    docker image rm --force "${project}-image:test" >/dev/null 2>&1 || true
    docker run --rm --entrypoint rm -v /tmp:/host-tmp "$image" -rf "/host-tmp/${project}" >/dev/null 2>&1 || true
  done
  exit "$status"
}
trap cleanup EXIT INT TERM

# shellcheck source=scripts/lib/ci-project.sh
source "$repository_root/scripts/lib/ci-project.sh"

# Fake run identifiers: nothing here can match a real run's stacks.
export GITHUB_RUN_ID="sweeptest${nonce}"
export GITHUB_RUN_ATTEMPT="1"
mine="$(EKKLESIA_CI_JOB_KEY=alpha ci_project_name mine)"
sibling="$(EKKLESIA_CI_JOB_KEY=beta ci_project_name sibling)"
foreign="ekklesia-sweep-control-${nonce}"
for project in "$mine" "$sibling" "$foreign"; do
  make_stack "$project"
done
# A job container connected to this job's stack network, exactly as compose-job-network.sh does.
docker run --detach --name "$job_container" --entrypoint sleep "$image" 600 >/dev/null
docker network connect "${mine}_default" "$job_container"

echo "--- --job removes this job's stacks, at any age, and nothing else"
EKKLESIA_CI_JOB_KEY=alpha bash scripts/ci-sweep.sh --job
check '! project_exists "$mine"' "this job's containers, network, volume, and image are gone"
check '! staging_exists "$mine"' "this job's staging directory on the Docker host is gone"
check 'project_exists "$sibling"' "another job's stack in the same run is left alone"
check 'project_exists "$foreign"' "a stack outside the CI prefix is left alone"
check 'docker inspect "$job_container" >/dev/null 2>&1' \
  "a job container connected to the stack's network is disconnected, never removed"

echo "--- --job refuses to run outside CI, where it could remove a developer's own stacks"
check '! env -u GITHUB_RUN_ID bash scripts/ci-sweep.sh --job >/dev/null 2>&1' \
  "--job without GITHUB_RUN_ID fails"

echo "--- --stale removes only CI stacks older than its threshold"
bash scripts/ci-sweep.sh --stale
check 'project_exists "$sibling"' "a young CI stack survives the default threshold"
bash scripts/ci-sweep.sh --stale --max-age-seconds 0
check '! project_exists "$sibling"' "a CI stack older than the threshold is removed"
check '! staging_exists "$sibling"' "its staging directory too"
check 'project_exists "$foreign"' "a stack outside the CI prefix is never removed, at any age"

if ((failures > 0)); then
  echo "test-ci-sweep: ${failures} check(s) failed." >&2
  exit 1
fi
echo "CI sweep checks passed."