#!/usr/bin/env bash
# Roster generator for spire:adepts — derived metadata from adept domain folders.
# Called via skill shell injection: !`bash "${CLAUDE_SKILL_DIR}/roster.sh"`
#
# Design principle: adepts write knowledge; tooling derives metadata. This
# script reads frontmatter declared once and journal filenames that already
# exist. No adept ever maintains an index, a counter, or a timestamp by hand.

# Resolve workpad — same chain as spire:workpad, minus interactive steps.
WP="${WORKPAD_FOLDER:-$(just workpad-folder 2>/dev/null)}"
if [ -z "$WP" ]; then
  # Try .claude/spire/project.md for an explicit Workpad: line
  if [ -f .claude/spire/project.md ]; then
    WP=$(sed -n 's/^- \*\*Workpad\*\*: *`\{0,1\}\([^` ]*\).*/\1/p' .claude/spire/project.md | head -1)
  fi
fi
[ -z "$WP" ] && { [ -d docs/workpad ] && WP=docs/workpad || WP=.workpad; }
[ -d "$WP/adepts" ] || { echo "## Adept roster — none (no $WP/adepts/)"; exit 0; }

echo "## Adept roster — $WP/adepts/ ($(date +%F))"
for dir in "$WP"/adepts/*/; do
  [ -d "$dir" ] || continue
  slug=$(basename "$dir")
  [ "$slug" = "_template" ] && continue

  # FC-6: Skip files without frontmatter early — avoid full-file reads through sed.
  if ! head -1 "$dir/CLAUDE.md" 2>/dev/null | grep -q '^---$'; then
    newest=$(ls "$dir"/journal/ "$dir" 2>/dev/null | grep -E '^[0-9]{4}-[0-9]{2}-[0-9]{2}-[0-9]{2}' | sort | tail -1 | cut -c1-13)
    echo "- **$slug** — (unmigrated: no frontmatter) · last active ${newest:-never}"
    continue
  fi

  fm=$(sed -n '2,/^---$/p' "$dir/CLAUDE.md" 2>/dev/null)
  summary=$(echo "$fm" | sed -n 's/^summary: *//p')
  status=$(echo "$fm" | sed -n 's/^status: *//p')
  related=$(echo "$fm" | sed -n 's/^related: *//p')

  # Recency and session count derived from journal filenames — nothing to maintain.
  newest=$(ls "$dir"/journal/ "$dir" 2>/dev/null | grep -E '^[0-9]{4}-[0-9]{2}-[0-9]{2}-[0-9]{2}' | sort | tail -1 | cut -c1-13)
  sessions=$(ls "$dir"/journal/ "$dir" 2>/dev/null | grep -Eo '^[0-9]{4}-[0-9]{2}-[0-9]{2}-[0-9]{2}' | sort -u | wc -l)

  if [ -z "$summary" ]; then
    echo "- **$slug** — (unmigrated: no frontmatter) · last active ${newest:-never}"
  else
    echo "- **$slug** — $summary · last active ${newest:-never} · $sessions session(s) · ${status:-active}${related:+ · related: $related}"
  fi
done