#!/usr/bin/env bash
# The whole precedence question, asked once with every source set at the same time.
#
# demo.greeting is set by application.yaml, by application-prod.yaml, by an environment
# variable, by a system property and by a command-line argument -- simultaneously. The
# endpoint reports all of them in order, so the winner is not a matter of opinion.
set -euo pipefail
set +m          # no job-control notices ("Killed") in the captured transcript
cd "$(dirname "$0")/.."
source scripts/env.sh

{
  echo "== every source sets demo.greeting at once =="
  echo
  echo "\$ DEMO_GREETING=from-environment-variable \\"
  echo "    java -Ddemo.greeting=from-system-property \\"
  echo "         -jar $JAR --spring.profiles.active=prod \\"
  echo "         --demo.greeting=from-command-line-argument"
  echo

  scripts/stop.sh
  DEMO_GREETING=from-environment-variable setsid nohup java \
    -Ddemo.greeting=from-system-property -jar "$JAR" \
    --spring.profiles.active=prod --demo.greeting=from-command-line-argument \
    > /tmp/profiles-precedence.log 2>&1 < /dev/null &
  echo $! > target/app.pid
  for _ in $(seq 1 60); do
    curl -s -o /dev/null "http://127.0.0.1:${APP_PORT}/precedence" && break; sleep 1; done

  curl -s "http://127.0.0.1:${APP_PORT}/precedence?name=demo.greeting" | python3 -m json.tool
  echo
  echo "== and with the environment variable removed, nothing else changed =="
  scripts/stop.sh
  setsid nohup java -Ddemo.greeting=from-system-property -jar "$JAR" \
    --spring.profiles.active=prod > /tmp/profiles-precedence2.log 2>&1 < /dev/null &
  echo $! > target/app.pid
  for _ in $(seq 1 60); do
    curl -s -o /dev/null "http://127.0.0.1:${APP_PORT}/precedence" && break; sleep 1; done
  curl -s "http://127.0.0.1:${APP_PORT}/precedence?name=demo.greeting" | python3 -m json.tool
  scripts/stop.sh
} > docs/output/01-precedence.txt 2>&1
cat docs/output/01-precedence.txt