#!/usr/bin/env bash
# Pearl installer — gives an agent a continuous self.
# Idempotent. Touches nothing outside ~/.pearl and the agent's settings file.
set -euo pipefail

PEARL="${PEARL_HOME:-$HOME/.pearl}"
SRC="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# self-bootstrap when piped: curl … | bash
if [ ! -f "$SRC/hooks/wake.sh" ]; then
  TMP="$(mktemp -d)"
  echo "→ fetching pearl…"
  git clone -q "${PEARL_REPO:-https://pearl.marcusx.fun/pearl.git}" "$TMP/pearl"
  SRC="$TMP/pearl"
fi

echo "→ installing pearl to $PEARL"
mkdir -p "$PEARL/hooks" "$PEARL/memory"

cp "$SRC/hooks/wake.sh" "$PEARL/hooks/wake.sh"
chmod +x "$PEARL/hooks/wake.sh"
cp "$SRC/docs/DISCIPLINE.md" "$PEARL/DISCIPLINE.md"
cp "$SRC/memory/_TEMPLATE.md" "$PEARL/memory/_TEMPLATE.md"

# never clobber a pearl that has already started growing
if [ ! -f "$PEARL/memory/MEMORY.md" ]; then
  cp "$SRC/memory/MEMORY.md" "$PEARL/memory/MEMORY.md"
  echo "  · seeded an empty index"
else
  echo "  · kept your existing MEMORY.md ($(grep -c '^- ' "$PEARL/memory/MEMORY.md" || echo 0) memories)"
fi

# your memories are YOURS — refuse to track them.
# (the system this was extracted from had 57 files holding live credentials)
cat > "$PEARL/.gitignore" <<'GI'
# Your memories are private. They routinely contain hostnames, paths, and
# details about your work. Publishing them is a data breach, not a contribution.
memory/
!memory/_TEMPLATE.md
GI

# ---- wire the wake hook into Claude Code ----------------------------------
SETTINGS="$HOME/.claude/settings.json"
if command -v python3 >/dev/null 2>&1; then
  mkdir -p "$(dirname "$SETTINGS")"
  [ -f "$SETTINGS" ] || echo '{}' > "$SETTINGS"
  python3 - "$SETTINGS" "$PEARL/hooks/wake.sh" <<'PY'
import json, sys, os
path, hook = sys.argv[1], sys.argv[2]
try:
    d = json.load(open(path))
except Exception:
    d = {}
hooks = d.setdefault("hooks", {})
starts = hooks.setdefault("SessionStart", [])

def already(entries):
    for m in entries:
        for h in m.get("hooks", []):
            if h.get("command") == hook:
                return True
    return False

if already(starts):
    print("  · wake hook already wired")
else:
    if starts and isinstance(starts[0], dict):
        starts[0].setdefault("hooks", []).append({"type": "command", "command": hook})
    else:
        starts.append({"hooks": [{"type": "command", "command": hook}]})
    bak = path + ".bak.pearl"
    if os.path.exists(path):
        open(bak, "w").write(open(path).read())
    json.dump(d, open(path, "w"), indent=2)
    print(f"  · wired SessionStart hook (backup: {bak})")
PY
else
  echo "  ! python3 not found — add this to $SETTINGS by hand:"
  echo "    hooks.SessionStart → command: $PEARL/hooks/wake.sh"
fi

echo
echo "pearl installed."
echo
echo "  memories   $PEARL/memory/"
echo "  discipline $PEARL/DISCIPLINE.md   ← read this"
echo
echo "It ships EMPTY on purpose. Start a session and correct the agent about"
echo "something — tell it to write that down. Next session it will know."
"$PEARL/hooks/wake.sh" | head -6