terraform {
  required_providers {
    coder = {
      source  = "coder/coder"
      version = "~> 0.8.2"
    }
    docker = {
      source  = "kreuzwerker/docker"
      version = "~> 3.0.1"
    }
  }
}

locals {
  username = data.coder_workspace.me.owner
}

provider "coder" {
  feature_use_managed_variables = "true"
}

data "coder_provisioner" "me" {
}

provider "docker" {
}

data "coder_workspace" "me" {
}

data "coder_parameter" "git_repo" {
  name        = "git_repo"
  display_name= "Git Repo"
  description = "Git Repo to Clone"
  default     = " "
}

data "coder_parameter" "language" {
  name        = "Code Language"
  description = "Select a language/tools/framework to install"
  type        = "string"
  default     = "default"

  option {
    name = "No Language (Pure Image)"
    value = "default"
  }

  option {
    name = "C"
    value = "c"
  }

  option {
    name = "Java"
    value = "java"
  }

  option {
    name = "Node"
    value = "node"
  }

  option {
    name = "Python 3"
    value = "python3"
  }
}

resource "coder_agent" "main" {
  arch                   = data.coder_provisioner.me.arch
  os                     = "linux"
  startup_script_timeout = 180
  startup_script         = <<-EOT
    set -e
    if [ "${data.coder_parameter.git_repo.value}" != " " ] && [ ! -d "${data.coder_workspace.me.name}" ]
    then
      git clone ${data.coder_parameter.git_repo.value}
    fi

  EOT

  # These environment variables allow you to make Git commits right away after creating a
  # workspace. Note that they take precedence over configuration defined in ~/.gitconfig!
  # You can remove this block if you'd prefer to configure Git manually or using
  # dotfiles. (see docs/dotfiles.md)
  env = {
    GIT_AUTHOR_NAME     = "Nicholas Pease"
    GIT_COMMITTER_NAME  = "Nicholas Pease"
    GIT_AUTHOR_EMAIL    = "me@nicholaspease.com"
    GIT_COMMITTER_EMAIL = "me@nicholaspease.com"
  }
}

resource "docker_volume" "home_volume" {
  name = "coder-${data.coder_workspace.me.id}-home"
  # Protect the volume from being deleted due to changes in attributes.
  lifecycle {
    ignore_changes = all
  }
  # Add labels in Docker to keep track of orphan resources.
  labels {
    label = "coder.owner"
    value = data.coder_workspace.me.owner
  }
  labels {
    label = "coder.owner_id"
    value = data.coder_workspace.me.owner_id
  }
  labels {
    label = "coder.workspace_id"
    value = data.coder_workspace.me.id
  }
  # This field becomes outdated if the workspace is renamed but can
  # be useful for debugging or cleaning out dangling volumes.
  labels {
    label = "coder.workspace_name_at_creation"
    value = data.coder_workspace.me.name
  }
}

resource "docker_image" "main" {
  name = "coder-${data.coder_workspace.me.id}"
  build {
    context = "./dockerfiles/${data.coder_parameter.language.value}"
    build_args = {
      USER = local.username
    }
  }
  triggers = {
    dir_sha1 = sha1(join("", [for f in fileset(path.module, "dockerfiles/${data.coder_parameter.language.value}/*") : filesha1(f)]))
  }
}

resource "docker_container" "workspace" {
  count = data.coder_workspace.me.start_count
  image = docker_image.main.name
  # Uses lower() to avoid Docker restriction on container names.
  name = "coder-${data.coder_workspace.me.owner}-${lower(data.coder_workspace.me.name)}"
  # Hostname makes the shell more user friendly: coder@my-workspace:~$
  hostname = data.coder_workspace.me.name
  # Use the docker gateway if the access URL is 127.0.0.1
  entrypoint = ["sh", "-c", replace(coder_agent.main.init_script, "/localhost|127\\.0\\.0\\.1/", "host.docker.internal")]
  env        = ["CODER_AGENT_TOKEN=${coder_agent.main.token}"]
  host {
    host = "host.docker.internal"
    ip   = "host-gateway"
  }
  volumes {
    container_path = "/home/${local.username}"
    volume_name    = docker_volume.home_volume.name
    read_only      = false
  }
  # Add labels in Docker to keep track of orphan resources.
  labels {
    label = "coder.owner"
    value = data.coder_workspace.me.owner
  }
  labels {
    label = "coder.owner_id"
    value = data.coder_workspace.me.owner_id
  }
  labels {
    label = "coder.workspace_id"
    value = data.coder_workspace.me.id
  }
  labels {
    label = "coder.workspace_name"
    value = data.coder_workspace.me.name
  }
}