fan:
  - platform: template
    id: test_fan
    name: "Test Fan"
    preset_modes:
      - Eco
      - Sleep
      - Turbo
    has_oscillating: true
    has_direction: true
    speed_count: 3

# Test lambdas using get_preset_mode() which returns StringRef
# These examples match the migration guide in the PR description
binary_sensor:
  - platform: template
    id: fan_has_preset
    name: "Fan Has Preset"
    lambda: |-
      // Migration guide: Checking if preset mode is set
      // Use empty() or has_preset_mode()
      if (!id(test_fan).get_preset_mode().empty()) {
        // preset is set
      }
      if (id(test_fan).has_preset_mode()) {
        // preset is set
      }

      // Migration guide: Comparing preset mode
      // Use == operator directly (safe, works even when empty)
      if (id(test_fan).get_preset_mode() == "Eco") {
        return true;
      }

      // Migration guide: Checking for no preset
      if (id(test_fan).get_preset_mode().empty()) {
        // no preset
      }
      if (!id(test_fan).has_preset_mode()) {
        // no preset
      }

      // Migration guide: Getting as std::string
      std::string preset = std::string(id(test_fan).get_preset_mode());

      // Migration guide: Logging option 1
      // Use .c_str() - works because StringRef points to null-terminated string in traits
      ESP_LOGD("test", "Preset: %s", id(test_fan).get_preset_mode().c_str());

      // Migration guide: Logging option 2
      // Use %.*s format (safer, no null-termination assumption)
      auto preset_ref = id(test_fan).get_preset_mode();
      ESP_LOGD("test", "Preset: %.*s", (int)preset_ref.size(), preset_ref.c_str());

      // Test != comparison
      if (id(test_fan).get_preset_mode() != "Sleep") {
        return true;
      }
      return false;