#!/bin/bash

# Dry run test for machine setup
# Shows what would be executed without making changes

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

TIN_SERVICE_NAME="gazette"
TIN_SERVICE_ENVIRONMENT="test" 
NAS_SERVER="DS412plus"

log() {
    echo "[DRY RUN] $*"
}

test_service_setup() {
    # Calculate what would be created
    local service_uid="11110"  # gazette:test
    local service_user="${TIN_SERVICE_NAME}-${TIN_SERVICE_ENVIRONMENT}"
    local sheet="${TIN_SHEET:-topsheet}"
    local nfs_export="/volume1/tinsnip/${sheet}/${TIN_SERVICE_NAME}/${TIN_SERVICE_ENVIRONMENT}"
    
    log "Service Setup Dry Run"
    log "===================="
    log "Service: $TIN_SERVICE_NAME"
    log "Environment: $TIN_SERVICE_ENVIRONMENT"
    log "NAS Server: $NAS_SERVER"
    log ""
    
    log "Would create user: $service_user (UID: $service_uid)"
    log "Would run: sudo useradd -u $service_uid -s /bin/bash -m $service_user"
    log ""
    
    log "Would install NFS dependencies:"
    log "  sudo apt-get update -qq"
    log "  sudo apt-get install -y nfs-common"
    log ""
    
    log "Would mount NFS:"
    log "  sudo mkdir -p /mnt/docker"
    log "  sudo mount -t nfs ${NAS_SERVER}:${nfs_export} /mnt/docker"
    log ""
    
    log "Would create XDG symlinks:"
    log "  mkdir -p ~/.local/state/${sheet}"
    log "  mkdir -p ~/.local/share/${sheet}" 
    log "  mkdir -p ~/.config/${sheet}"
    log "  ln -sfn /mnt/docker/state ~/.local/state/${sheet}/@${TIN_SERVICE_NAME}"
    log "  ln -sfn /mnt/docker/data ~/.local/share/${sheet}/@${TIN_SERVICE_NAME}"
    log "  ln -sfn /mnt/docker/config ~/.config/${sheet}/@${TIN_SERVICE_NAME}"
    log ""
    
    log "Would install rootless Docker for $service_user:"
    log "  sudo -u $service_user curl -fsSL https://get.docker.com/rootless | sh"
    log "  sudo setcap cap_net_bind_service=ep \$(which rootlesskit)"
    log "  sudo -u $service_user systemctl --user enable docker.service"
    log ""
    
    log "Final state would be:"
    log "  User: $service_user (UID: $service_uid)"
    log "  Mount: /mnt/docker -> ${NAS_SERVER}:${nfs_export}"
    log "  Docker: Rootless with privileged ports"
    log "  XDG: ~/.local/{state,share,config}/${sheet}/@${TIN_SERVICE_NAME}"
}

main() {
    test_service_setup
    
    echo
    echo "To run actual setup:"
    echo "  $SCRIPT_DIR/setup.sh $TIN_SERVICE_NAME $TIN_SERVICE_ENVIRONMENT $NAS_SERVER"
}

main "$@"