// This is a jsonnet file, it generates a docker-compose.yml file.
// To generate, run "make docker-compose.yml".

{

  // These are the important top-level settings.
  // Change these to configure the services.

  // Image tag (application version) to use.
  // Note: "latest" is not reccomended in production, as you can't be sure what version
  // you're actually running, and must manually re-pull to get an updated copy.
  image_tag:: "latest",

  // For each service, whether to deploy that service.
  enabled:: {
    downloader: true,
    restreamer: true,
    backfiller: true,
    cutter: true,
    sheetsync: true,
    thrimshim: true,
    nginx: true,
    postgres: true,
  },

  // Twitch channel to capture
  channel:: "desertbus",

  // Stream qualities to capture
  qualities:: ["source", "480p"],

  // Local path to save segments to. Full path must already exist. Cannot contain ':'.
  // On OSX you need to change this to /private/var/lib/wubloader
  segments_path:: "/var/lib/wubloader/",

  // Local path to save database to. Full path must already exist. Cannot contain ':'.
  database_path:: "/var/lib/wubloader_postgres/",

  // The host's port to expose each service on.
  // Only the restreamer needs to be externally accessible - the others are just for monitoring.
  ports:: {
    restreamer: 8000,
    thrimshim: 8004,
    downloader: 8001,
    backfiller: 8002,
    cutter: 8003,
    sheetsync: 8005,
    nginx: 80,
    postgres: 5432,
  },

  // The local port within each container to bind the backdoor server on.
  // You can exec into the container and telnet to this port to get a python shell.
  backdoor_port:: 1234,

  // Other nodes to backfill from. You should not include the local node.
  peers:: [
    "http://wubloader.codegunner.com/"
  ],

  // Connection args for the database.
  // If database is defined in this config, host and port should be postgres:5432.
  db_args:: {
    user: "postgres",
    password: "postgres",
    host: "postgres",
    port: 5432,
    dbname: "wubloader",
  },

  // Path to a JSON file containing google credentials as keys
  // 'client_id', 'client_secret' and 'refresh_token'.
  google_creds:: "./google_creds.json",

  // The URL to write to the sheet for edit links, with {} being replaced by the id
  edit_url:: "http://thrimbletrimmer.codegunner.com/{}",

  // The timestamp corresponding to 00:00 in bustime
  bustime_start:: "1970-01-01T00:00:00Z",

  // The spreadsheet id and worksheet names for sheet sync to act on
  sheet_id:: "your_id_here",
  worksheets:: ["Day %d" % n for n in std.range(1, 7)],

  // Now for the actual docker-compose config

  // The connection string for the database. Constructed from db_args.
  db_connect:: std.join(" ", [
    "%s=%s" % [key, $.db_args[key]]
    for key in std.objectFields($.db_args)
  ]),

  // docker-compose version
  version: "3",

  services: {

    [if $.enabled.downloader then "downloader"]: {
      image: "quay.io/ekimekim/wubloader-downloader:%s" % $.image_tag,
      // Args for the downloader: set channel and qualities
      command: [
        $.channel,
        "--base-dir", "/mnt",
        "--qualities", std.join(",", $.qualities),
        "--backdoor-port", std.toString($.backdoor_port),
      ],
      // Mount the segments directory at /mnt
      volumes: ["%s:/mnt" % $.segments_path],
      // If the application crashes, restart it.
      restart: "on-failure",
      // Expose on the configured host port by mapping that port to the default
      // port for downloader, which is 8001.
      [if "downloader" in $.ports then "ports"]: ["%s:8001" % $.ports.downloader]
    },

    [if $.enabled.restreamer then "restreamer"]: {
      image: "quay.io/ekimekim/wubloader-restreamer:%s" % $.image_tag,
      // Mount the segments directory at /mnt
      volumes: ["%s:/mnt" % $.segments_path],
      // If the application crashes, restart it.
      restart: "on-failure",
      // Expose on the configured host port by mapping that port to the default
      // port for restreamer, which is 8000.
      [if "restreamer" in $.ports then "ports"]: ["%s:8000" % $.ports.restreamer],
      command: [
        "--base-dir", "/mnt",
        "--backdoor-port", std.toString($.backdoor_port),
      ],
    },

    [if $.enabled.backfiller then "backfiller"]: {
      image: "quay.io/ekimekim/wubloader-backfiller:%s" % $.image_tag,
      // Args for the backfiller: set channel and qualities
      command: [
        $.channel,
        "--base-dir", "/mnt",
        "--qualities", std.join(",", $.qualities),
        "--static-nodes", std.join(",", $.peers),
        "--backdoor-port", std.toString($.backdoor_port),
      ],
      // Mount the segments directory at /mnt
      volumes: ["%s:/mnt" % $.segments_path],
      // If the application crashes, restart it.
      restart: "on-failure",
      // Expose on the configured host port by mapping that port to the default
      // port for backfiller, which is 8002.
      [if "backfiller" in $.ports then "ports"]: ["%s:8002" % $.ports.backfiller]
    },

    [if $.enabled.cutter then "cutter"]: {
      image: "quay.io/ekimekim/wubloader-cutter:%s" % $.image_tag,
      // Args for the cutter: DB and google creds
      command: [
        "--base-dir", "/mnt",
        "--backdoor-port", std.toString($.backdoor_port),
        $.db_connect,
        "/etc/wubloader-google-creds.json",
      ],
      volumes: [
        // Mount the segments directory at /mnt
        "%s:/mnt" % $.segments_path,
        // Mount the creds file into /etc
        "%s:/etc/wubloader-google-creds.json" % $.google_creds,
      ],
      // If the application crashes, restart it.
      restart: "on-failure",
      // Expose on the configured host port by mapping that port to the default
      // port for cutter, which is 8003.
      [if "cutter" in $.ports then "ports"]: ["%s:8003" % $.ports.cutter]
    },

    [if $.enabled.thrimshim then "thrimshim"]: {
      image: "quay.io/ekimekim/wubloader-thrimshim:%s" % $.image_tag,
      // Args for the thrimshim: set channel and qualities
      command: [
        "--backdoor-port", std.toString($.backdoor_port),
        $.db_connect,
      ],
      // Mount the segments directory at /mnt
      volumes: ["%s:/mnt" % $.segments_path],
      // If the application crashes, restart it.
      restart: "on-failure",
      // Expose on the configured host port by mapping that port to the default
      // port for thrimshim, which is 8004.
      [if "thrimshim" in $.ports then "ports"]: ["%s:8004" % $.ports.thrimshim]
    },

    [if $.enabled.sheetsync then "sheetsync"]: {
      image: "quay.io/ekimekim/wubloader-sheetsync:%s" % $.image_tag,
      // Args for the sheetsync
      command: [
        "--backdoor-port", std.toString($.backdoor_port),
        $.db_connect,
        "/etc/wubloader-google-creds.json",
        $.edit_url,
        $.bustime_start,
        $.sheet_id,
      ] + $.worksheets,
      volumes: [
        // Mount the creds file into /etc
        "%s:/etc/wubloader-google-creds.json" % $.google_creds,
      ],
      // If the application crashes, restart it.
      restart: "on-failure",
      // Expose on the configured host port by mapping that port to the default
      // port for sheetsync, which is 8005.
      [if "sheetsync" in $.ports then "ports"]: ["%s:8005" % $.ports.sheetsync]
    },

    [if $.enabled.nginx then "nginx"]: {
      # mapping of services to internal ports for nginx to forward
      local forward_ports = {
        restreamer: 8000,
        downloader: 8001,
        backfiller: 8002,
        cutter: 8003,
        thrimshim: 8004,
        sheetsync: 8005,
      },
      image: "quay.io/ekimekim/wubloader-nginx:%s" % $.image_tag,
      restart: "on-failure",
      [if "nginx" in $.ports then "ports"]: ["%s:80" % $.ports.nginx],
      environment: {
        SERVICES: std.join("\n", [
          "%s %s" % [service, forward_ports[service]]
          for service in std.objectFields(forward_ports)
          if service in $.enabled && $.enabled[service]
        ]),
      },
    },

    [if $.enabled.postgres then "postgres"]: {
      image: "postgres:latest",
      restart: "on-failure",
      [if "postgres" in $.ports then "ports"]: ["%s:5432" % $.ports.postgres],
      environment: {
        POSTGRES_USER: $.db_args.user,
        POSTGRES_PASSWORD: $.db_args.password,
        POSTGRES_DB: $.db_args.dbname,
      },
    },

  },

}