#!/bin/sh

# Print compact git state for vev's bottom-right bar anchor.
# Always inspect VEV_PANE_CWD, never the daemon's current working directory.

if [ -z "${VEV_PANE_CWD:-}" ]; then
	printf '\n'
	exit 0
fi

if ! git -C "$VEV_PANE_CWD" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
	printf '\n'
	exit 0
fi

name=$(git -C "$VEV_PANE_CWD" branch --show-current 2>/dev/null || true)
if [ -z "$name" ]; then
	name=$(git -C "$VEV_PANE_CWD" rev-parse --short HEAD 2>/dev/null || true)
fi
if [ -z "$name" ]; then
	printf '\n'
	exit 0
fi

line=$name

counts=$(git -C "$VEV_PANE_CWD" rev-list --left-right --count '@{upstream}...HEAD' 2>/dev/null || true)
if [ -n "$counts" ]; then
	behind=$(printf '%s\n' "$counts" | awk '{ print $1 }')
	ahead=$(printf '%s\n' "$counts" | awk '{ print $2 }')
	case $ahead in
		''|*[!0-9]*) ahead=0 ;;
	esac
	case $behind in
		''|*[!0-9]*) behind=0 ;;
	esac
	if [ "$ahead" -gt 0 ] 2>/dev/null; then
		line="$line ↑$ahead"
	fi
	if [ "$behind" -gt 0 ] 2>/dev/null; then
		line="$line ↓$behind"
	fi
fi

if [ -n "$(git -C "$VEV_PANE_CWD" status --porcelain 2>/dev/null || true)" ]; then
	line="$line *"
fi

printf '%s\n' "$line"