import os from 'os'

/* Prefix for all source paths
 * except for unlinks and symlinks which use targetRoot below.
 *
 * Use process.cwd() for the current working directory.
 *
 * Default: the current working directory.
 */
const originRoot = os.homedir()

/* Prefix for all destination paths.
 * For unlinks and symlinks, the source is also prefixed.
 *
 * Use process.cwd() for the current working directory.
 *
 * Default: a ./dest folder under the current working directory.
 */
const targetRoot = os.homedir()

/* Package lookup backend to use:
 * pacman, dpkg, homebrew, pkgng, or noop.
 *
 * The special value noop will assume all packages are installed.
 *
 * Default: attempt to autodetect, fallback to noop.
 */
const pkgType = 'homebrew'

/* I/O backend to use:
 * linux, macos, or noop.
 *
 * The special value noop will not perform any modifications
 * and only log what actions would be taken.
 *
 * Default: attempt to autodetect, fallback to noop.
 */
const ioType = 'macos'

/* Defaults to use for each operation.
 *
 * Default: shown below.
 */
const defaults = {
  order: 100, // all operations start with this order value
  dmode: '0750', // files have user write, group read, other no access
  fmode: '0640', // directories have user write, group read, other no access
  user: process.getuid(), // current user
  group: process.getgid() // current group
}

/* Operations to perform by type.
 *
 * Operations always happen in this order: unlinks, directories, files, and symlinks.
 *
 * Each type of operations waits until the previous type has completed successfully.
 *
 * Operations of each type with equal order value are always done in parallel,
 * but operations with a later order do not start until earlier ones complete.
 *
 * Specifying an array of hostnames will restrict that
 * operation to matching hosts (case insensitive).
 *
 * Specifying an array of packages will restrict that
 * operation to hosts with all packages installed (case insensitive).
 *
 * All operation types will default to an empty array if unset.
 */

/* Unlink (unconditionally remove) the directory, file, or symlink at src.
 *
 * The src is relative to the global targetRoot option.
 */
const unlinks = [
  {
    // Remove ~/intruders on all hosts.
    src: 'intruders'
  },
  {
    // Remove ~/warpcore on host enterprise, if the eject package is installed.
    src: 'warpcore',
    hosts: ['enterprise'],
    pkgs: ['eject']
  }
]

/* Synchronize the contents of the directory at src to dst
 * and sets the directory and file permissions.
 *
 * The src is relative to the global originRoot option.
 * The dst is relative to the global targetRoot option.
 *
 * NOTE: this WILL remove files in dst that are not in src.
 *
 * If dst is not given, will use src as the subpath.
 */
const directories = [
  {
    // Synchronize ./holodeck to ~/holodeck on all hosts.
    src: 'holodeck'
  },
  {
    // Synchronize ./panels/exploding to ~/bridge/panels
    // on hosts enterprise and defiant,
    // if the turbolift and transporter packages are installed,
    // and set specific user, group, and access permissions.
    src: 'panels/exploding',
    dst: 'bridge/panels',
    user: 'numberone',
    group: 'officers',
    dmode: '0755',
    fmode: '0644',
    hosts: ['enterprise', 'defiant'],
    pkgs: ['turbolift', 'transporter']
  },
  {
    // Install sickbay first, then install the beds and meds.
    src: 'decks/sickbay',
    dst: 'sickbay',
    order: 10
  },
  {
    src: 'beds',
    dst: 'sickbay/beds',
    order: 11
  },
  {
    src: 'meds',
    dst: 'sickbay/meds',
    order: 11
  }
]

/* Copy the file at src to dst
 * and sets the file permissions.
 *
 * The src is relative to the global originRoot option.
 * The dst is relative to the global targetRoot option.
 *
 * NOTE: this WILL replace the file at dst.
 *
 * If dst is not given, will use src as the subpath.
 */
const files = [
  {
    // Copy ./bay/torpedo to ~/bay/torpedo on all hosts.
    src: 'bay/torpedo'
  },
  {
    // Copy ./phaser to ~/brig/phaser
    // on host defiant, if the stun package is installed,
    // and set the user, group, and access permissions.
    src: 'phaser',
    dst: 'brig/phaser',
    user: 'warf',
    group: 'security',
    fmode: '0600',
    hosts: ['defiant'],
    pkgs: ['stun']
  }
]

/* Create a system link (symlink) at src pointing to dst.
 *
 * The src and dst are relative to the global targetRoot option.
 *
 * NOTE: this WILL replace the file at src.
 */
const symlinks = [
  {
    // Create a symlink from ~/drink to ~/tea/earlgray/hot on all hosts.
    src: 'drink',
    dst: 'tea/earlgray/hot'
  },
  {
    // Create a symlink from ~/hypospray to ~/hyposprays/norepinephrine
    // on host enterprise if the sickbay package is installed.
    src: 'hypospray',
    dst: 'hyposprays/norepinephrine',
    hosts: ['enterprise'],
    pkgs: ['sickbay']
  }
]

/* Export each value set above.
 * Simply do not export an option to use the default.
 */
export default {
  unlinks,
  directories,
  files,
  symlinks,
  originRoot,
  targetRoot,
  ioType,
  pkgType,
  defaults
}