# frozen_string_literal: true
require 'test_helper'

class TestConfigLoader < Minitest::Test
  def setup
    options = Prefab::Options.new(
      prefab_config_override_dir: "none",
      prefab_config_classpath_dir: "test",
      prefab_envs: "unit_tests"
    )
    @loader = Prefab::ConfigLoader.new(MockBaseClient.new(options))
  end

  def test_load
    should_be :int, 123, "sample_int"
    should_be :string, "test sample value", "sample"
    should_be :bool, true, "sample_bool"
    should_be :double, 12.12, "sample_double"
  end

  def test_nested
    should_be :string, "nested value", "nested.values.string"
    should_be :string, "top level", "nested.values"
    should_be :log_level, :ERROR, "log-level.app"
    should_be :log_level, :WARN, "log-level.app.controller.hello"
    should_be :log_level, :INFO, "log-level.app.controller.hello.index"
  end

  def test_invalid_log_level
    should_be :log_level, :NOT_SET_LOG_LEVEL, "log-level.invalid"
  end

  def test_load_without_unit_test_env
    options = Prefab::Options.new(
      prefab_config_override_dir: "none",
      prefab_config_classpath_dir: "test",
      # no prefab_envs
    )
    @loader = Prefab::ConfigLoader.new(MockBaseClient.new(options))
    should_be :string, "default sample value", "sample"
    should_be :bool, true, "sample_bool"
  end

  def test_highwater
    assert_equal 0, @loader.highwater_mark
    @loader.set(Prefab::Config.new(id: 1, key: "sample_int", rows: [Prefab::ConfigRow.new(value: Prefab::ConfigValue.new(int: 456))]),"test")
    assert_equal 1, @loader.highwater_mark

    @loader.set(Prefab::Config.new(id: 5, key: "sample_int", rows: [Prefab::ConfigRow.new(value: Prefab::ConfigValue.new(int: 456))]),"test")
    assert_equal 5, @loader.highwater_mark
    @loader.set(Prefab::Config.new(id: 2, key: "sample_int", rows: [Prefab::ConfigRow.new(value: Prefab::ConfigValue.new(int: 456))]),"test")
    assert_equal 5, @loader.highwater_mark
  end

  def test_keeps_most_recent
    assert_equal 0, @loader.highwater_mark
    @loader.set(Prefab::Config.new(id: 1, key: "sample_int", rows: [Prefab::ConfigRow.new(value: Prefab::ConfigValue.new(int: 1))]),"test")
    assert_equal 1, @loader.highwater_mark
    should_be :int, 1, "sample_int"

    @loader.set(Prefab::Config.new(id: 4, key: "sample_int", rows: [Prefab::ConfigRow.new(value: Prefab::ConfigValue.new(int: 4))]),"test")
    assert_equal 4, @loader.highwater_mark
    should_be :int, 4, "sample_int"

    @loader.set(Prefab::Config.new(id: 2, key: "sample_int", rows: [Prefab::ConfigRow.new(value: Prefab::ConfigValue.new(int: 2))]),"test")
    assert_equal 4, @loader.highwater_mark
    should_be :int, 4, "sample_int"
  end

  def test_api_precedence
    should_be :int, 123, "sample_int"

    @loader.set(Prefab::Config.new(key: "sample_int", rows: [Prefab::ConfigRow.new(value: Prefab::ConfigValue.new(int: 456))]), "test")
    should_be :int, 456, "sample_int"
  end

  def test_api_deltas
    val = Prefab::ConfigValue.new(int: 456)
    config = Prefab::Config.new(key: "sample_int", rows: [Prefab::ConfigRow.new(value: val)])
    @loader.set(config, "test")

    configs = Prefab::Configs.new
    configs.configs << config
    assert_equal configs, @loader.get_api_deltas
  end

  def test_loading_tombstones_removes_entries
    val = Prefab::ConfigValue.new(int: 456)
    config = Prefab::Config.new(key: "sample_int", rows: [Prefab::ConfigRow.new(value: val)], id: 2)
    @loader.set(config, "test")

    config = Prefab::Config.new(key: "sample_int", rows: [], id: 3)
    @loader.set(config, "test")

    configs = Prefab::Configs.new
    assert_equal configs, @loader.get_api_deltas
  end

  private

  def should_be(type, value, key)
    assert_equal type, @loader.calc_config[key][:config].rows[0].value.type
    assert_equal value, @loader.calc_config[key][:config].rows[0].value.send(type)
  end
end