#!/usr/bin/env bash
# Oi: single-click Navigator trigger for acme.
# Spawns or reuses a persistent Navigator session scoped to cwd,
# sends current file context, and opens the chat window.
set -euo pipefail

cmd=${0##*/}
die() { printf '%s: %s\n' "$cmd" "$*" >&2; exit 1; }

OLLIE=${OLLIE:-$HOME/mnt/ollie}
try() { "$@" 2>/dev/null || { ollie-remount && "$@"; }; }

# Derive deterministic session name from cwd
cwd=$(pwd)
hash=$(printf '%s' "$cwd" | cksum | awk '{print $1}')
NAV_NAME="nav-${hash}"
NAV_PATH="$OLLIE/s/$NAV_NAME"

# Spawn session if it doesn't exist
if ! [ -d "$NAV_PATH" ] 2>/dev/null; then
	printf 'name=%s\ncwd=%s\nagent=partner\n' "$NAV_NAME" "$cwd" | try tee "$OLLIE/s/new" >/dev/null
	sleep 0.5
fi

# Gather context from acme window (if running inside one)
context=""
if [ -n "${winid:-}" ] && [ "$winid" != "0" ]; then
	filename=$(9p read acme/$winid/tag | awk '{print $1; exit}')

	# Read selection (dot)
	sel=$(9p read acme/$winid/rdsel 2>/dev/null || true)

	# Git diff for this file (unstaged changes)
	diff=$(cd "$cwd" && git diff -- "$filename" 2>/dev/null | head -100 || true)

	context="File: $filename"
	[ -n "$sel" ] && context="$context\n\nSelection:\n$sel"
	[ -n "$diff" ] && context="$context\n\nRecent changes (git diff):\n$diff"
else
	# No acme window context; just send cwd info
	diff=$(cd "$cwd" && git diff --stat HEAD 2>/dev/null | head -30 || true)
	context="Working directory: $cwd"
	[ -n "$diff" ] && context="$context\n\nRecent changes:\n$diff"
fi

# Send prompt to Navigator
printf '%b' "$context\n\nReview this and share your observations." | try tee "$NAV_PATH/prompt" >/dev/null

# Print session ID so ollie-acme can open it
printf '%s\n' "$NAV_NAME"
