data "docker_registry_image" "hedgedoc" {
  name = "quay.io/hedgedoc/hedgedoc:1.10.0"
}

data "docker_network" "traefik" {
  name = "traefik"
}

resource "docker_network" "hedgedoc" {
  name       = "hedgedoc"
  attachable = true
  driver     = "overlay"

  lifecycle {
    ignore_changes = [labels]
  }
}

locals {
  labels = {
    "shepherd.auto-update"                                                 = "true",
    "traefik.enable"                                                       = "true"
    "traefik.http.services.hedgedoc.loadbalancer.server.port"              = "3000",
    "traefik.http.routers.hedgedoc.rule"                                   = "Host(`pad.montage2.de`)||Host(`pad.chaoswest.tv`)",
    "traefik.http.routers.hedgedoc.tls"                                    = "true",
    "traefik.http.routers.hedgedoc.tls.certresolver"                       = "default",
    "traefik.http.routers.hedgedoc.middlewares"                            = "hedgedoc-redirect",
    "traefik.http.middlewares.hedgedoc-redirect.redirectregex.regex"       = "^https://pad.montage2.de/(.*)",
    "traefik.http.middlewares.hedgedoc-redirect.redirectregex.replacement" = "https://pad.chaoswest.tv/$$${1}", # double escaping is necessary here
  }
}

resource "docker_service" "hedgedoc" {
  name = "hedgedoc"

  dynamic "labels" {
    for_each = local.labels
    content {
      label = labels.key
      value = labels.value
    }
  }

  task_spec {
    networks_advanced {
      name = data.docker_network.traefik.id
    }

    networks_advanced {
      name = docker_network.hedgedoc.id
    }

    container_spec {
      image = "${data.docker_registry_image.hedgedoc.name}@${data.docker_registry_image.hedgedoc.sha256_digest}"

      env = merge({
        for k, v in var.secrets : k => v
        }, {
        CMD_DB_URL                                = "sqlite:/hedgedoc/db/hedgedoc.sqlite",
        CMD_DOMAIN                                = "pad.chaoswest.tv",
        CMD_URL_ADDPORT                           = "false",
        CMD_PROTOCOL_USESSL                       = "true",
        CMD_EMAIL                                 = "false",
        CMD_ALLOW_EMAIL_REGISTER                  = "false",
        CMD_ALLOW_FREEURL                         = "true",
        CMD_OAUTH2_PROVIDERNAME                   = "authentik",
        CMD_OAUTH2_SCOPE                          = "openid email profile",
        CMD_OAUTH2_USER_PROFILE_URL               = "https://authentik.montage2.de/application/o/userinfo/",
        CMD_OAUTH2_TOKEN_URL                      = "https://authentik.montage2.de/application/o/token/",
        CMD_OAUTH2_AUTHORIZATION_URL              = "https://authentik.montage2.de/application/o/authorize/",
        CMD_OAUTH2_USER_PROFILE_USERNAME_ATTR     = "preferred_username",
        CMD_OAUTH2_USER_PROFILE_DISPLAY_NAME_ATTR = "name",
        CMD_OAUTH2_USER_PROFILE_EMAIL_ATTR        = "email",
      })

      mounts {
        target = "/hedgedoc/db"
        source = "/mnt/data/pad/db"
        type   = "bind"
      }

      mounts {
        target = "/hedgedoc/public/uploads"
        source = "/mnt/data/pad/uploads"
        type   = "bind"
      }
    }
  }
}