#!/bin/bash
# tin machine status - Show machine environment status

set -euo pipefail

# Get tinsnip root and source libraries
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
TINSNIP_ROOT="$(dirname "$(dirname "$SCRIPT_DIR")")"
source "$TINSNIP_ROOT/lib/core.sh"
source "$TINSNIP_ROOT/lib/uid.sh"

# Show machine environment status
show_machine_status() {
    local service_env="$1"

    # Parse service-environment
    local parsed_output
    if ! parsed_output=$(parse_machine_name "$service_env" 2>/dev/null); then
        error_with_prefix "Machine Status" "Invalid machine environment format: '$service_env'"
        echo "Expected: <service>-<environment> (e.g., gazette-prod, bsky-pds-dev)" >&2
        exit 1
    fi

    local service=$(echo "$parsed_output" | sed -n '1p')
    local environment=$(echo "$parsed_output" | sed -n '2p')
    
    echo "Machine Environment Status: $service_env"
    echo "========================================"
    echo
    
    # Calculate UID and check user exists
    local service_uid
    if service_uid=$(calculate_service_uid "$service" "$environment" 2>/dev/null); then
        echo "Service: $service"
        echo "Environment: $environment"
        echo "UID: $service_uid"
        
        if getent passwd "$service_uid" >/dev/null 2>&1; then
            local username=$(getent passwd "$service_uid" | cut -d: -f1)
            echo "User: $username ✅"
        else
            echo "User: missing ❌"
            echo "Create with: tin machine create $service $environment"
            return 1
        fi
    else
        error_with_prefix "Machine Status" "Cannot calculate UID for $service_env"
        return 1
    fi
    
    # Check NFS mount
    local mount_point="/mnt/$service-$environment"
    echo "Mount: $mount_point"
    if mountpoint -q "$mount_point" 2>/dev/null; then
        echo "  Status: mounted ✅"
        echo "  Usage: $(df -h "$mount_point" | tail -1 | awk '{print $3 "/" $2 " (" $5 " used)"}')"
    else
        echo "  Status: not mounted ❌"
    fi
    
    # Check Docker access
    if sudo -u "$service-$environment" docker version >/dev/null 2>&1; then
        echo "Docker: accessible ✅"
    else
        echo "Docker: not accessible ❌"
    fi
    
    echo
    echo "Environment variables:"
    if sudo -u "$service-$environment" bash -c 'source ~/.tinsnip-env-loader.sh 2>/dev/null && env | grep ^TIN_' 2>/dev/null; then
        echo "  Environment: loaded ✅"
    else
        echo "  Environment: not configured ❌"
    fi
}

# Main execution
if [[ $# -eq 0 ]]; then
    error_with_prefix "Machine Status" "Service-environment required"
    echo "Usage: tin machine status <service-env>" >&2
    echo "Example: tin machine status gazette-prod" >&2
    exit 1
fi

service_env="$1"
show_machine_status "$service_env"