# frozen_string_literal: true

RSpec::Matchers.define :require_graphql_authorizations do |*expected|
  match do |klass|
    permissions = if klass.respond_to?(:required_permissions)
                    klass.required_permissions
                  else
                    [klass.to_graphql.metadata[:authorize]]
                  end

    expect(permissions).to eq(expected)
  end
end

RSpec::Matchers.define :have_graphql_fields do |*expected|
  def expected_field_names
    Array.wrap(expected).map { |name| GraphqlHelpers.fieldnamerize(name) }
  end

  @allow_extra = false

  chain :only do
    @allow_extra = false
  end

  chain :at_least do
    @allow_extra = true
  end

  match do |kls|
    if @allow_extra
      expect(kls.fields.keys).to include(*expected_field_names)
    else
      expect(kls.fields.keys).to contain_exactly(*expected_field_names)
    end
  end

  failure_message do |kls|
    missing = expected_field_names - kls.fields.keys
    extra = kls.fields.keys - expected_field_names

    message = []

    message << "is missing fields: <#{missing.inspect}>" if missing.any?
    message << "contained unexpected fields: <#{extra.inspect}>" if extra.any? && !@allow_extra

    message.join("\n")
  end
end

RSpec::Matchers.define :include_graphql_fields do |*expected|
  expected_field_names = expected.map { |name| GraphqlHelpers.fieldnamerize(name) }

  match do |kls|
    expect(kls.fields.keys).to include(*expected_field_names)
  end

  failure_message do |kls|
    missing = expected_field_names - kls.fields.keys
    "is missing fields: <#{missing.inspect}>" if missing.any?
  end
end

RSpec::Matchers.define :have_graphql_field do |field_name, args = {}|
  match do |kls|
    field = kls.fields[GraphqlHelpers.fieldnamerize(field_name)]

    expect(field).to be_present

    args.each do |argument, value|
      expect(field.send(argument)).to eq(value)
    end
  end
end

RSpec::Matchers.define :have_graphql_mutation do |mutation_class|
  match do |mutation_type|
    field = mutation_type.fields[GraphqlHelpers.fieldnamerize(mutation_class.graphql_name)]

    expect(field).to be_present
    expect(field.resolver).to eq(mutation_class)
  end
end

# note: connection arguments do not have to be named, they will be inferred.
RSpec::Matchers.define :have_graphql_arguments do |*expected|
  include GraphqlHelpers

  def expected_names(field)
    @names ||= Array.wrap(expected).map { |name| GraphqlHelpers.fieldnamerize(name) }

    if field.type.try(:ancestors)&.include?(GraphQL::Types::Relay::BaseConnection)
      @names | %w(after before first last)
    else
      @names
    end
  end

  match do |field|
    names = expected_names(field)

    expect(field.arguments.keys).to contain_exactly(*names)
  end

  failure_message do |field|
    names = expected_names(field)

    "expected that #{field.name} would have the following fields: #{names.inspect}, but it has #{field.arguments.keys.inspect}."
  end
end

RSpec::Matchers.define :have_graphql_type do |expected|
  match do |field|
    expect(field.type).to eq(expected)
  end
end

RSpec::Matchers.define :have_non_null_graphql_type do |expected|
  match do |field|
    expect(field.type.to_graphql).to eq(!expected.to_graphql)
  end
end

RSpec::Matchers.define :have_graphql_resolver do |expected|
  match do |field|
    case expected
    when Method
      expect(field.to_graphql.metadata[:type_class].resolve_proc).to eq(expected)
    else
      expect(field.to_graphql.metadata[:type_class].resolver).to eq(expected)
    end
  end
end

RSpec::Matchers.define :have_graphql_extension do |expected|
  match do |field|
    expect(field.to_graphql.metadata[:type_class].extensions).to include(expected)
  end
end

RSpec::Matchers.define :expose_permissions_using do |expected|
  match do |type|
    permission_field = type.fields['userPermissions']

    expect(permission_field).not_to be_nil
    expect(permission_field.type).to be_non_null
    expect(permission_field.type.of_type.graphql_name).to eq(expected.graphql_name)
  end
end