#!/usr/bin/env bash
# Claude Code status line: shows topic, model, and context usage
# Reads session JSON from stdin, displays topic from per-session file

set -euo pipefail

DATA=$(cat)

SESSION_ID=$(echo "$DATA" | jq -r '.session_id // empty')
MODEL=$(echo "$DATA" | jq -r '.model.display_name // "unknown"')
CONTEXT_PCT=$(echo "$DATA" | jq -r '.context_window.used_percentage // 0' | cut -d. -f1)

TOPIC=""
if [[ -n "$SESSION_ID" ]]; then
    # Write session ID to a known location so Claude can discover it
    CWD=$(echo "$DATA" | jq -r '.cwd // empty')
    if [[ -n "$CWD" ]]; then
        HASH=$(echo -n "$CWD" | md5sum | cut -d' ' -f1)
        echo "$SESSION_ID" > "/tmp/claude-session-id-$HASH"

        # Apply any pending topic that was set before the session ID existed
        PENDING_FILE="/tmp/claude-pending-topic-$HASH"
        if [[ -f "$PENDING_FILE" ]]; then
            TOPIC_DIR="$HOME/.claude/status/$SESSION_ID"
            mkdir -p "$TOPIC_DIR"
            mv "$PENDING_FILE" "$TOPIC_DIR/claude-topic.txt"
        fi
    fi

    TOPIC_FILE="$HOME/.claude/status/$SESSION_ID/claude-topic.txt"
    if [[ -f "$TOPIC_FILE" ]]; then
        TOPIC=$(cat "$TOPIC_FILE")
    fi
fi

if [[ -n "$TOPIC" ]]; then
    echo "[$MODEL] $TOPIC | ${CONTEXT_PCT}% context"
else
    echo "[$MODEL] ${CONTEXT_PCT}% context"
fi