defmodule Mv.Authorization.PermissionSetsTest do
  @moduledoc """
  Tests for the PermissionSets module that defines hardcoded permission sets.
  """
  use ExUnit.Case, async: true

  alias Mv.Authorization.PermissionSets

  describe "all_permission_sets/0" do
    test "returns all four permission sets" do
      sets = PermissionSets.all_permission_sets()

      assert length(sets) == 4
      assert :own_data in sets
      assert :read_only in sets
      assert :normal_user in sets
      assert :admin in sets
    end
  end

  describe "get_permissions/1" do
    test "returns map with :resources and :pages keys for :own_data" do
      permissions = PermissionSets.get_permissions(:own_data)

      assert Map.has_key?(permissions, :resources)
      assert Map.has_key?(permissions, :pages)
      assert is_list(permissions.resources)
      assert is_list(permissions.pages)
    end

    test "returns map with :resources and :pages keys for :read_only" do
      permissions = PermissionSets.get_permissions(:read_only)

      assert Map.has_key?(permissions, :resources)
      assert Map.has_key?(permissions, :pages)
      assert is_list(permissions.resources)
      assert is_list(permissions.pages)
    end

    test "returns map with :resources and :pages keys for :normal_user" do
      permissions = PermissionSets.get_permissions(:normal_user)

      assert Map.has_key?(permissions, :resources)
      assert Map.has_key?(permissions, :pages)
      assert is_list(permissions.resources)
      assert is_list(permissions.pages)
    end

    test "returns map with :resources and :pages keys for :admin" do
      permissions = PermissionSets.get_permissions(:admin)

      assert Map.has_key?(permissions, :resources)
      assert Map.has_key?(permissions, :pages)
      assert is_list(permissions.resources)
      assert is_list(permissions.pages)
    end

    test "each resource permission has required keys" do
      permissions = PermissionSets.get_permissions(:own_data)

      Enum.each(permissions.resources, fn perm ->
        assert Map.has_key?(perm, :resource)
        assert Map.has_key?(perm, :action)
        assert Map.has_key?(perm, :scope)
        assert Map.has_key?(perm, :granted)
        assert is_binary(perm.resource)
        assert perm.action in [:read, :create, :update, :destroy]
        assert perm.scope in [:own, :linked, :all]
        assert is_boolean(perm.granted)
      end)
    end

    test "pages lists are non-empty for all permission sets" do
      for set <- [:own_data, :read_only, :normal_user, :admin] do
        permissions = PermissionSets.get_permissions(set)

        assert permissions.pages != [],
               "Permission set #{set} should have at least one page"
      end
    end
  end

  describe "get_permissions/1 - :own_data permission content" do
    test "allows User read/update with scope :own" do
      permissions = PermissionSets.get_permissions(:own_data)

      user_read =
        Enum.find(permissions.resources, fn p -> p.resource == "User" && p.action == :read end)

      user_update =
        Enum.find(permissions.resources, fn p -> p.resource == "User" && p.action == :update end)

      assert user_read.scope == :own
      assert user_read.granted == true
      assert user_update.scope == :own
      assert user_update.granted == true
    end

    test "allows Member read/update with scope :linked" do
      permissions = PermissionSets.get_permissions(:own_data)

      member_read =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :read end)

      member_update =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :update end)

      assert member_read.scope == :linked
      assert member_read.granted == true
      assert member_update.scope == :linked
      assert member_update.granted == true
    end

    test "allows CustomFieldValue read/update with scope :linked" do
      permissions = PermissionSets.get_permissions(:own_data)

      cfv_read =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :read
        end)

      cfv_update =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :update
        end)

      assert cfv_read.scope == :linked
      assert cfv_read.granted == true
      assert cfv_update.scope == :linked
      assert cfv_update.granted == true
    end

    test "allows CustomField read with scope :all" do
      permissions = PermissionSets.get_permissions(:own_data)

      cf_read =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomField" && p.action == :read
        end)

      assert cf_read.scope == :all
      assert cf_read.granted == true
    end

    test "includes correct pages" do
      permissions = PermissionSets.get_permissions(:own_data)

      assert "/" in permissions.pages
      assert "/profile" in permissions.pages
      assert "/members/:id" in permissions.pages
    end
  end

  describe "get_permissions/1 - :read_only permission content" do
    test "allows User read/update with scope :own" do
      permissions = PermissionSets.get_permissions(:read_only)

      user_read =
        Enum.find(permissions.resources, fn p -> p.resource == "User" && p.action == :read end)

      user_update =
        Enum.find(permissions.resources, fn p -> p.resource == "User" && p.action == :update end)

      assert user_read.scope == :own
      assert user_read.granted == true
      assert user_update.scope == :own
      assert user_update.granted == true
    end

    test "allows Member read with scope :all" do
      permissions = PermissionSets.get_permissions(:read_only)

      member_read =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :read end)

      assert member_read.scope == :all
      assert member_read.granted == true
    end

    test "does NOT allow Member create/update/destroy" do
      permissions = PermissionSets.get_permissions(:read_only)

      member_create =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :create end)

      member_update =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :update end)

      member_destroy =
        Enum.find(permissions.resources, fn p ->
          p.resource == "Member" && p.action == :destroy
        end)

      assert member_create == nil || member_create.granted == false
      assert member_update == nil || member_update.granted == false
      assert member_destroy == nil || member_destroy.granted == false
    end

    test "allows CustomFieldValue read with scope :all" do
      permissions = PermissionSets.get_permissions(:read_only)

      cfv_read =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :read
        end)

      assert cfv_read.scope == :all
      assert cfv_read.granted == true
    end

    test "does NOT allow CustomFieldValue create/update/destroy" do
      permissions = PermissionSets.get_permissions(:read_only)

      cfv_create =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :create
        end)

      cfv_update =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :update
        end)

      cfv_destroy =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :destroy
        end)

      assert cfv_create == nil || cfv_create.granted == false
      assert cfv_update == nil || cfv_update.granted == false
      assert cfv_destroy == nil || cfv_destroy.granted == false
    end

    test "allows CustomField read with scope :all" do
      permissions = PermissionSets.get_permissions(:read_only)

      cf_read =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomField" && p.action == :read
        end)

      assert cf_read.scope == :all
      assert cf_read.granted == true
    end

    test "includes correct pages" do
      permissions = PermissionSets.get_permissions(:read_only)

      assert "/" in permissions.pages
      assert "/members" in permissions.pages
      assert "/members/:id" in permissions.pages
      assert "/custom_field_values" in permissions.pages
    end
  end

  describe "get_permissions/1 - :normal_user permission content" do
    test "allows User read/update with scope :own" do
      permissions = PermissionSets.get_permissions(:normal_user)

      user_read =
        Enum.find(permissions.resources, fn p -> p.resource == "User" && p.action == :read end)

      user_update =
        Enum.find(permissions.resources, fn p -> p.resource == "User" && p.action == :update end)

      assert user_read.scope == :own
      assert user_read.granted == true
      assert user_update.scope == :own
      assert user_update.granted == true
    end

    test "allows Member read/create/update with scope :all" do
      permissions = PermissionSets.get_permissions(:normal_user)

      member_read =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :read end)

      member_create =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :create end)

      member_update =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :update end)

      assert member_read.scope == :all
      assert member_read.granted == true
      assert member_create.scope == :all
      assert member_create.granted == true
      assert member_update.scope == :all
      assert member_update.granted == true
    end

    test "does NOT allow Member destroy (safety)" do
      permissions = PermissionSets.get_permissions(:normal_user)

      member_destroy =
        Enum.find(permissions.resources, fn p ->
          p.resource == "Member" && p.action == :destroy
        end)

      assert member_destroy == nil || member_destroy.granted == false
    end

    test "allows CustomFieldValue full CRUD with scope :all" do
      permissions = PermissionSets.get_permissions(:normal_user)

      cfv_read =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :read
        end)

      cfv_create =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :create
        end)

      cfv_update =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :update
        end)

      cfv_destroy =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :destroy
        end)

      assert cfv_read.scope == :all
      assert cfv_read.granted == true
      assert cfv_create.scope == :all
      assert cfv_create.granted == true
      assert cfv_update.scope == :all
      assert cfv_update.granted == true
      assert cfv_destroy.scope == :all
      assert cfv_destroy.granted == true
    end

    test "allows CustomField read with scope :all" do
      permissions = PermissionSets.get_permissions(:normal_user)

      cf_read =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomField" && p.action == :read
        end)

      assert cf_read.scope == :all
      assert cf_read.granted == true
    end

    test "includes correct pages" do
      permissions = PermissionSets.get_permissions(:normal_user)

      assert "/" in permissions.pages
      assert "/members" in permissions.pages
      assert "/members/new" in permissions.pages
      assert "/members/:id" in permissions.pages
      assert "/members/:id/edit" in permissions.pages
      assert "/custom_field_values" in permissions.pages
      assert "/custom_field_values/new" in permissions.pages
      assert "/custom_field_values/:id/edit" in permissions.pages
    end
  end

  describe "get_permissions/1 - :admin permission content" do
    test "allows User full CRUD with scope :all" do
      permissions = PermissionSets.get_permissions(:admin)

      user_read =
        Enum.find(permissions.resources, fn p -> p.resource == "User" && p.action == :read end)

      user_create =
        Enum.find(permissions.resources, fn p -> p.resource == "User" && p.action == :create end)

      user_update =
        Enum.find(permissions.resources, fn p -> p.resource == "User" && p.action == :update end)

      user_destroy =
        Enum.find(permissions.resources, fn p -> p.resource == "User" && p.action == :destroy end)

      assert user_read.scope == :all
      assert user_read.granted == true
      assert user_create.scope == :all
      assert user_create.granted == true
      assert user_update.scope == :all
      assert user_update.granted == true
      assert user_destroy.scope == :all
      assert user_destroy.granted == true
    end

    test "allows Member full CRUD with scope :all" do
      permissions = PermissionSets.get_permissions(:admin)

      member_read =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :read end)

      member_create =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :create end)

      member_update =
        Enum.find(permissions.resources, fn p -> p.resource == "Member" && p.action == :update end)

      member_destroy =
        Enum.find(permissions.resources, fn p ->
          p.resource == "Member" && p.action == :destroy
        end)

      assert member_read.scope == :all
      assert member_read.granted == true
      assert member_create.scope == :all
      assert member_create.granted == true
      assert member_update.scope == :all
      assert member_update.granted == true
      assert member_destroy.scope == :all
      assert member_destroy.granted == true
    end

    test "allows CustomFieldValue full CRUD with scope :all" do
      permissions = PermissionSets.get_permissions(:admin)

      cfv_read =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :read
        end)

      cfv_create =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :create
        end)

      cfv_update =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :update
        end)

      cfv_destroy =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomFieldValue" && p.action == :destroy
        end)

      assert cfv_read.scope == :all
      assert cfv_read.granted == true
      assert cfv_create.scope == :all
      assert cfv_create.granted == true
      assert cfv_update.scope == :all
      assert cfv_update.granted == true
      assert cfv_destroy.scope == :all
      assert cfv_destroy.granted == true
    end

    test "allows CustomField full CRUD with scope :all" do
      permissions = PermissionSets.get_permissions(:admin)

      cf_read =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomField" && p.action == :read
        end)

      cf_create =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomField" && p.action == :create
        end)

      cf_update =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomField" && p.action == :update
        end)

      cf_destroy =
        Enum.find(permissions.resources, fn p ->
          p.resource == "CustomField" && p.action == :destroy
        end)

      assert cf_read.scope == :all
      assert cf_read.granted == true
      assert cf_create.scope == :all
      assert cf_create.granted == true
      assert cf_update.scope == :all
      assert cf_update.granted == true
      assert cf_destroy.scope == :all
      assert cf_destroy.granted == true
    end

    test "allows Role full CRUD with scope :all" do
      permissions = PermissionSets.get_permissions(:admin)

      role_read =
        Enum.find(permissions.resources, fn p -> p.resource == "Role" && p.action == :read end)

      role_create =
        Enum.find(permissions.resources, fn p -> p.resource == "Role" && p.action == :create end)

      role_update =
        Enum.find(permissions.resources, fn p -> p.resource == "Role" && p.action == :update end)

      role_destroy =
        Enum.find(permissions.resources, fn p -> p.resource == "Role" && p.action == :destroy end)

      assert role_read.scope == :all
      assert role_read.granted == true
      assert role_create.scope == :all
      assert role_create.granted == true
      assert role_update.scope == :all
      assert role_update.granted == true
      assert role_destroy.scope == :all
      assert role_destroy.granted == true
    end

    test "has wildcard page permission" do
      permissions = PermissionSets.get_permissions(:admin)

      assert "*" in permissions.pages
    end
  end

  describe "valid_permission_set?/1" do
    test "returns true for valid permission set string" do
      assert PermissionSets.valid_permission_set?("own_data") == true
      assert PermissionSets.valid_permission_set?("read_only") == true
      assert PermissionSets.valid_permission_set?("normal_user") == true
      assert PermissionSets.valid_permission_set?("admin") == true
    end

    test "returns true for valid permission set atom" do
      assert PermissionSets.valid_permission_set?(:own_data) == true
      assert PermissionSets.valid_permission_set?(:read_only) == true
      assert PermissionSets.valid_permission_set?(:normal_user) == true
      assert PermissionSets.valid_permission_set?(:admin) == true
    end

    test "returns false for invalid permission set string" do
      assert PermissionSets.valid_permission_set?("invalid") == false
      assert PermissionSets.valid_permission_set?("") == false
      assert PermissionSets.valid_permission_set?("admin_user") == false
    end

    test "returns false for invalid permission set atom" do
      assert PermissionSets.valid_permission_set?(:invalid) == false
      assert PermissionSets.valid_permission_set?(:unknown) == false
    end

    test "returns false for nil input" do
      assert PermissionSets.valid_permission_set?(nil) == false
    end
  end

  describe "permission_set_name_to_atom/1" do
    test "returns {:ok, atom} for valid permission set name" do
      assert PermissionSets.permission_set_name_to_atom("own_data") == {:ok, :own_data}
      assert PermissionSets.permission_set_name_to_atom("read_only") == {:ok, :read_only}
      assert PermissionSets.permission_set_name_to_atom("normal_user") == {:ok, :normal_user}
      assert PermissionSets.permission_set_name_to_atom("admin") == {:ok, :admin}
    end

    test "returns {:error, :invalid_permission_set} for invalid permission set name" do
      assert PermissionSets.permission_set_name_to_atom("invalid") ==
               {:error, :invalid_permission_set}

      assert PermissionSets.permission_set_name_to_atom("") == {:error, :invalid_permission_set}

      assert PermissionSets.permission_set_name_to_atom("admin_user") ==
               {:error, :invalid_permission_set}
    end

    test "handles non-existent atom gracefully" do
      # String.to_existing_atom will raise ArgumentError for non-existent atoms
      assert PermissionSets.permission_set_name_to_atom("nonexistent_atom_12345") ==
               {:error, :invalid_permission_set}
    end
  end
end