#!/usr/bin/env bash
# USE CASE: the supervisor owns its own config (supervisor.xml) with log defaults.
#
# WHAT THIS TESTS
#   The supervisor is impartial infrastructure with a small config of its own —
#   distinct from any project manifest. On first start it writes supervisor.xml
#   at the state dir with sensible defaults (10MB / 5 files). A user can edit it
#   to change the default log-rotation caps for every service that does not set
#   its own; those caps must actually take effect at the log-writer level.
#
# EXPECTED OUTCOME
#   - First start creates supervisor.xml with the default caps (10485760 / 5).
#   - After editing the caps to a TINY max_bytes and restarting, a chatty service
#     with no logs block rotates its log at that tiny cap (proving the supervisor
#     default is honored) — a rotated file appears.
set -u
. /usecase/lib.sh

CONFIG=/usecase/stack.yaml
STATE_DIR="$HOME/.local/share/systemg"
SUP_XML="$STATE_DIR/supervisor.xml"
LOG_DIR="$STATE_DIR/logs/demo"
LOG_CAP_BYTES=4096
LOG_SIZE_CEILING_BYTES=65536

section "first start writes indented supervisor.xml with operator defaults"
sysg start --config "$CONFIG" --daemonize
check "$?" "start exits 0"
sleep 2
[ -f "$SUP_XML" ]
check "$?" "supervisor.xml was created at the state dir"
echo "--- supervisor.xml ---"; cat "$SUP_XML"; echo
grep -q '10485760' "$SUP_XML"
check "$?" "default max_bytes 10485760 (10MB) present"
grep -q '<max_files>5</max_files>' "$SUP_XML"
check "$?" "default max_files 5 present"
grep -q '^  <logs>$' "$SUP_XML"
check "$?" "supervisor.xml is nested and indented"
grep -q '<pre_start_secs>300</pre_start_secs>' "$SUP_XML"
check "$?" "default pre-start timeout present"
grep -q '<startup_stability_ms>250</startup_stability_ms>' "$SUP_XML"
check "$?" "default startup stability present"
grep -q '<stop_verify_secs>10</stop_verify_secs>' "$SUP_XML"
check "$?" "default stop verification timeout present"

section "edit the cap tiny, restart; the service log rotates at the new cap"
sysg stop --supervisor >/dev/null 2>&1
sleep 1
rm -rf "$LOG_DIR" 2>/dev/null
# 4 KB cap, keep 3 rotated files. A chatty service will blow past 4KB fast, so
# a rotated file (e.g. chatty.log.1 or a numbered variant) must appear.
cat > "$SUP_XML" <<XML
<supervisor><logs><max_bytes>$LOG_CAP_BYTES</max_bytes><max_files>3</max_files></logs></supervisor>
XML
sysg start --config "$CONFIG" --daemonize
check "$?" "restart with the edited supervisor.xml exits 0"
sleep 4
sysg stop --supervisor >/dev/null 2>&1
check "$?" "supervisor stops before log inspection"
grep -q '^  <logs>$' "$SUP_XML"
check "$?" "compact legacy supervisor.xml is normalized"
grep -q "<max_bytes>$LOG_CAP_BYTES</max_bytes>" "$SUP_XML"
check "$?" "normalization preserves the custom log cap"
grep -q '<pre_start_secs>300</pre_start_secs>' "$SUP_XML"
check "$?" "legacy supervisor.xml receives timeout defaults"

echo "--- log dir contents ---"; ls -la "$LOG_DIR" 2>/dev/null
mapfile -t LOG_FILES < <(find "$LOG_DIR" -maxdepth 1 -type f -name 'chatty*' -print | sort)
ROTATED_COUNT=0
OVERSIZED_COUNT=0
for path in "${LOG_FILES[@]}"; do
  name="$(basename "$path")"
  if [[ "$name" =~ \.log\.[0-9]+$ || "$name" =~ \.[0-9]+\.log$ || "$name" =~ \.[0-9]+$ ]]; then
    ROTATED_COUNT=$((ROTATED_COUNT + 1))
  fi
  SIZE="$(wc -c < "$path")"
  echo "$name: ${SIZE} bytes"
  if [ "$SIZE" -ge "$LOG_SIZE_CEILING_BYTES" ]; then
    OVERSIZED_COUNT=$((OVERSIZED_COUNT + 1))
  fi
done
echo "files=${#LOG_FILES[@]} rotated_count=$ROTATED_COUNT oversized_count=$OVERSIZED_COUNT"
[ "$ROTATED_COUNT" -ge 1 ]
check "$?" "service log ROTATED at the tiny supervisor default (rotated file present)"
[ "$OVERSIZED_COUNT" -eq 0 ]
check "$?" "service logs stay bounded near the configured cap"
finish