#!/usr/bin/env bash
# install.sh - copy this repo's extensions into the global pi extensions dir.
#
# Copies (does not symlink) every *.ts here into ~/.pi/agent/extensions so the
# global set is a deliberate snapshot, not live-linked to in-progress dev edits.
# Files already identical at the destination are skipped.
# After installing, use /reload inside a running pi session to pick them up.
#
# Also installs the standalone CLI helpers in scripts/ into ~/bin (override with
# PI_BIN_DIR), same copy-not-symlink policy.
#
# Override the target dir with PI_EXT_DIR, e.g:
#   PI_EXT_DIR=~/.config/pi/agent/extensions ./install.sh
#
# Flags:
#   -n, --dry-run   show what would be copied without writing
set -euo pipefail

cd "$(dirname "$0")"

DEST="${PI_EXT_DIR:-$HOME/.pi/agent/extensions}"
BIN_DEST="${PI_BIN_DIR:-$HOME/bin}"

# Standalone CLI tools: "<source in scripts/>:<installed name>"
# answer-picker.ts needs no helper binary any more: zellij draws and hit-tests
# the buttons itself (OSC 5577) and reports clicks on pi's stdin. The previous
# socket+separate-pane implementation is kept, unwired, in attic/ — attic is not
# globbed by this script, so nothing there is installed.
CLI_TOOLS=( "pi-resume:pir" )

dry_run=0
case "${1:-}" in
  -n|--dry-run) dry_run=1 ;;
  "") ;;
  *) echo "install.sh: unknown arg '$1'" >&2; exit 2 ;;
esac

# Extensions to NOT install globally (dev-only / experimental / broken).
EXCLUDE=( sixel-images.ts )

is_excluded() {
  local f="$1" x
  for x in "${EXCLUDE[@]}"; do [ "$f" = "$x" ] && return 0; done
  return 1
}

shopt -s nullglob
all=(*.ts)
shopt -u nullglob
files=()
for f in "${all[@]}"; do
  is_excluded "$f" && { echo "excluded (dev-only) $f" >&2; continue; }
  files+=("$f")
done

if [ "${#files[@]}" -eq 0 ]; then
  echo "install.sh: no *.ts extensions found in $(pwd)" >&2
  exit 1
fi

if [ "$dry_run" -eq 1 ]; then
  echo "Would sync ${#files[@]} extension(s) into: $DEST"
  for f in "${files[@]}"; do
    if cmp -s "$f" "$DEST/$f"; then
      echo "  skip (identical) $f"
    else
      echo "  copy            $f"
    fi
  done
  echo "Would sync ${#CLI_TOOLS[@]} CLI tool(s) into: $BIN_DEST"
  for spec in "${CLI_TOOLS[@]}"; do
    src="scripts/${spec%%:*}"; name="${spec##*:}"
    if cmp -s "$src" "$BIN_DEST/$name"; then
      echo "  skip (identical) $name"
    else
      echo "  copy            $name"
    fi
  done
  exit 0
fi

mkdir -p "$DEST"
copied=0
for f in "${files[@]}"; do
  if cmp -s "$f" "$DEST/$f"; then
    echo "skipped (identical) $f"
    continue
  fi
  cp "$f" "$DEST/$f"
  echo "installed $f -> $DEST/$f"
  copied=$((copied + 1))
done

mkdir -p "$BIN_DEST"
for spec in "${CLI_TOOLS[@]}"; do
  src="scripts/${spec%%:*}"; name="${spec##*:}"
  [ -f "$src" ] || { echo "install.sh: missing $src" >&2; continue; }
  if cmp -s "$src" "$BIN_DEST/$name"; then
    echo "skipped (identical) $name"
    continue
  fi
  cp "$src" "$BIN_DEST/$name"
  chmod +x "$BIN_DEST/$name"
  echo "installed $name -> $BIN_DEST/$name"
  copied=$((copied + 1))
done

echo
if [ "$copied" -eq 0 ]; then
  echo "Nothing changed; global set already up to date."
else
  echo "Done ($copied changed). Run /reload in a pi session (or restart pi) to load them."
fi