#!/usr/bin/env bash
# Wrapper that runs claude and handles auto-restart signals
# Usage: meridian-wrapper [claude args...]

set -euo pipefail

# Find project root (where .meridian exists)
find_project_root() {
    local dir="$PWD"
    while [[ "$dir" != "/" ]]; do
        if [[ -d "$dir/.meridian" ]]; then
            echo "$dir"
            return 0
        fi
        dir="$(dirname "$dir")"
    done
    echo "$PWD"  # Fallback to current dir
}

PROJECT_ROOT="$(find_project_root)"
SIGNAL_FILE="$PROJECT_ROOT/.meridian/.state/restart-signal"

# Clean any stale signal file on startup
rm -f "$SIGNAL_FILE" 2>/dev/null || true

while true; do
    # Run claude with all passed arguments
    claude "$@" || EXIT_CODE=$?
    EXIT_CODE=${EXIT_CODE:-0}

    # Check for restart signal
    if [[ -f "$SIGNAL_FILE" ]]; then
        # Read the initial prompt from signal file
        INITIAL_PROMPT=$(cat "$SIGNAL_FILE")
        rm -f "$SIGNAL_FILE"

        echo ""
        echo "🔄 Meridian: Restarting session with prompt: \"$INITIAL_PROMPT\""
        echo ""

        # Small delay to ensure clean handoff
        sleep 0.5

        # Restart claude with the prompt as argument
        # Note: claude accepts initial prompt as positional argument
        set -- "$INITIAL_PROMPT"  # Replace args with just the prompt
        continue  # Loop back to run claude with new args
    else
        # No restart signal - exit wrapper with claude's exit code
        exit $EXIT_CODE
    fi
done