defmodule BDS.ProjectsTest do
  use ExUnit.Case, async: false

  import Ecto.Query

  alias BDS.Projects.Project
  alias BDS.Repo
  alias BDS.Templates.Template

  setup do
    :ok = Ecto.Adapters.SQL.Sandbox.checkout(BDS.Repo)

    temp_root = Path.join(System.tmp_dir!(), "bds-projects-#{System.unique_integer([:positive])}")
    File.mkdir_p!(temp_root)

    on_exit(fn -> File.rm_rf(temp_root) end)

    %{temp_root: temp_root}
  end

  test "create_project slugifies names, keeps new projects inactive, and deduplicates slugs", %{
    temp_root: temp_root
  } do
    first_dir = Path.join(temp_root, "first")
    second_dir = Path.join(temp_root, "second")
    File.mkdir_p!(first_dir)
    File.mkdir_p!(second_dir)

    assert {:ok, first} =
             BDS.Projects.create_project(%{name: "Föö Bär Blog", data_path: first_dir})

    assert first.name == "Föö Bär Blog"
    assert first.slug == "foo-bar-blog"
    assert first.data_path == first_dir
    assert first.is_active == false
    assert is_integer(first.created_at)
    assert is_integer(first.updated_at)

    assert {:ok, second} =
             BDS.Projects.create_project(%{name: "Föö Bär Blog", data_path: second_dir})

    assert second.slug == "foo-bar-blog-2"
    assert second.is_active == false
  end

  test "create_project leaves the project templates directory empty by default", %{
    temp_root: temp_root
  } do
    temp_dir = Path.join(temp_root, "starter")
    File.mkdir_p!(temp_dir)

    assert {:ok, project} =
             BDS.Projects.create_project(%{name: "Starter Blog", data_path: temp_dir})

    refute File.exists?(Path.join([temp_dir, "templates", "single-post.liquid"]))
    refute File.exists?(Path.join([temp_dir, "templates", "post-list.liquid"]))
    refute File.exists?(Path.join([temp_dir, "templates", "not-found.liquid"]))
    refute File.exists?(Path.join([temp_dir, "templates", "partials", "head.liquid"]))
    refute File.exists?(Path.join([temp_dir, "templates", "partials", "menu-items.liquid"]))
    refute File.exists?(Path.join([temp_dir, "templates", "macros", "gallery.liquid"]))

    starter_slugs =
      Repo.all(
        from template in Template,
          where: template.project_id == ^project.id,
          select: {template.slug, template.kind}
      )

    refute {"single-post", :post} in starter_slugs
    refute {"post-list", :list} in starter_slugs
    refute {"not-found", :not_found} in starter_slugs
  end

  test "set_active_project clears the previous active project and activates the target", %{
    temp_root: temp_root
  } do
    first_dir = Path.join(temp_root, "active-first")
    second_dir = Path.join(temp_root, "active-second")
    File.mkdir_p!(first_dir)
    File.mkdir_p!(second_dir)

    assert {:ok, first} = BDS.Projects.create_project(%{name: "First", data_path: first_dir})
    assert {:ok, second} = BDS.Projects.create_project(%{name: "Second", data_path: second_dir})

    assert {:ok, active_first} = BDS.Projects.set_active_project(first.id)
    assert active_first.is_active == true

    assert {:ok, active_second} = BDS.Projects.set_active_project(second.id)
    assert active_second.is_active == true

    refetched_first = BDS.Projects.get_project!(first.id)
    refetched_second = BDS.Projects.get_project!(second.id)

    assert refetched_first.is_active == false
    assert refetched_second.is_active == true
    assert Enum.count(BDS.Projects.list_projects(), & &1.is_active) == 1
  end

  test "ensure_default_project creates the default project once and keeps it active" do
    Repo.delete_all(Project)

    assert {:ok, default_project} = BDS.Projects.ensure_default_project()
    assert default_project.id == "default"
    assert default_project.name == "My Blog"
    assert default_project.slug == "my-blog"
    assert default_project.is_active == true

    assert {:ok, same_project} = BDS.Projects.ensure_default_project()
    assert same_project.id == default_project.id
    assert Repo.aggregate(Project, :count, :id) == 1
  end

  test "delete_project rejects the default and active projects", %{temp_root: temp_root} do
    Repo.delete_all(Project)

    assert {:ok, default_project} = BDS.Projects.ensure_default_project()
    assert {:error, :cannot_delete_default_project} = BDS.Projects.delete_project(default_project.id)

    temp_dir = Path.join(temp_root, "active-delete")
    File.mkdir_p!(temp_dir)

    assert {:ok, project} = BDS.Projects.create_project(%{name: "Delete Me", data_path: temp_dir})
    assert {:ok, _active_project} = BDS.Projects.set_active_project(project.id)

    assert {:error, :cannot_delete_active_project} = BDS.Projects.delete_project(project.id)
    project_id = project.id
    assert %Project{id: ^project_id} = BDS.Projects.get_project(project.id)
  end

  test "delete_project removes internal project data but preserves external data paths", %{temp_root: temp_root} do
    assert {:ok, internal_project} = BDS.Projects.create_project(%{name: "Internal Project"})

    internal_dir = BDS.Projects.project_data_dir(internal_project)

    on_exit(fn ->
      _ = File.rm_rf(internal_dir)
    end)

    refute File.exists?(Path.join(internal_dir, "templates/single-post.liquid"))

    assert {:ok, deleted_internal_project} = BDS.Projects.delete_project(internal_project.id)
    assert deleted_internal_project.id == internal_project.id
    assert BDS.Projects.get_project(internal_project.id) == nil
    refute File.exists?(internal_dir)

    external_dir = Path.join(temp_root, "external-delete")
    File.mkdir_p!(external_dir)

    assert {:ok, external_project} =
             BDS.Projects.create_project(%{name: "External Project", data_path: external_dir})

    marker_path = Path.join(external_dir, "keep.txt")
    File.write!(marker_path, "preserve me")

    assert {:ok, deleted_external_project} = BDS.Projects.delete_project(external_project.id)
    assert deleted_external_project.id == external_project.id
    assert BDS.Projects.get_project(external_project.id) == nil
    assert File.read!(marker_path) == "preserve me"
  end
end