#!/bin/bash

installDockerNetwork()
{
  if [[ "$DOCKER_NETWORK_SETUP_NEEDED" != "true" ]]; then
    isNotice "Docker network $CFG_NETWORK_NAME already exists or setup not needed"
    return 0
  fi

  isHeader "Create a Docker Network"

  # Re-check existence right before creating, and converge instead of erroring
  # if it's already there. The requirement check that set
  # DOCKER_NETWORK_SETUP_NEEDED can run before the rootless daemon socket is
  # reachable (a failed inspect is indistinguishable from "network absent"), and
  # a previous install leaves the network behind — both make us think it's new
  # when it isn't. If it exists, leave it in place and adopt its real subnet so
  # CFG stays in step with docker (and we don't randomize to a subnet we can't apply).
  if dockerCommandRun "docker network inspect $CFG_NETWORK_NAME > /dev/null 2>&1"; then
    local current_subnet; current_subnet=$(dockerCommandRun "docker network inspect $CFG_NETWORK_NAME --format '{{range .IPAM.Config}}{{.Subnet}}{{end}}' 2>/dev/null")
    isNotice "Docker network $CFG_NETWORK_NAME already exists, leaving it in place"
    if [[ -n "$current_subnet" && "$current_subnet" != "$CFG_NETWORK_SUBNET" ]]; then
      adoptDockerSubnet "$current_subnet"
    fi
    return 0
  fi

  isNotice "Network $CFG_NETWORK_NAME not found, creating now"

  # Check if we need to generate a new subnet
  updateDockerNetworkSubnet

  # Create the Docker network command
  local network_create="docker network create \
--driver=bridge \
--subnet=$CFG_NETWORK_SUBNET \
--ip-range=${CFG_NETWORK_SUBNET%.*}.0/24 \
--gateway=${CFG_NETWORK_SUBNET%.*}.1 \
--opt com.docker.network.bridge.name=$CFG_NETWORK_NAME \
$CFG_NETWORK_NAME"

  # Run the network creation command
  local result; result=$(dockerCommandRun "$network_create")
  if [[ $? -eq 0 ]]; then
    checkSuccess "Docker network $CFG_NETWORK_NAME created successfully"
  else
    isError "Failed to create Docker network $CFG_NETWORK_NAME"
    isError " $result"
  fi
}