/**
 * Firmware version gates for UI features.
 *
 * Versions are compared using `parseFirmwareVersion` (e.g. 2007 → 2.0.0.7).
 * Adjust thresholds here instead of hardcoding in page components.
 */
export const FIRMWARE_FEATURE_MIN_VERSION = {
  /** Boot sound: indices 7–10 (-35…-50 dB); legacy firmware caps at index 6. */
  bootSoundExtendedSteps: 26,
  /** Subwoofer LPF/HPF full-range toggles on the Effects page. */
  subwooferFullRange: 2001,
  /** Hearing compensation section on the Effects page. */
  hearingCompensation: 2007,
  /** PEQ preset rename (peqRename) and reorder (peqSoft) in manage dialog. */
  peqPresetRenameAndSort: 2008,
  /** Audio 页面耳机最大音量和耳机启动音量设置。 */
  hpVolumeSettings: 2011,
  /** EQ 单个滤波器的 Bypass 开关（旁通时下发 type=10）。 */
  peqBandBypass: 2012,
  /** 设备语言扩展到 LangType 全枚举（12 种）；低于此版本仅前 3 种（0/1/2）可下发设备。 */
  extendedDeviceLanguages: 2012,
  /** System 页屏幕亮度改为 10 档拖动条（screenLight 下发 0–9）；低于此版本保持三档选择列表。 */
  screenBrightnessSlider: 2012,
} as const;

export type FirmwareFeatureKey = keyof typeof FIRMWARE_FEATURE_MIN_VERSION;

export function isFirmwareFeatureAvailable(
  feature: FirmwareFeatureKey,
  firmwareVersion: number,
): boolean {
  return firmwareVersion >= FIRMWARE_FEATURE_MIN_VERSION[feature];
}

/** Max `bootSound` select index (0–6 legacy, 0–10 when extended steps are supported). */
export function getBootSoundMaxIndex(firmwareVersion: number): number {
  return isFirmwareFeatureAvailable("bootSoundExtendedSteps", firmwareVersion) ? 10 : 6;
}

export function supportsPeqPresetRenameAndSort(firmwareVersion: number): boolean {
  return isFirmwareFeatureAvailable("peqPresetRenameAndSort", firmwareVersion);
}

export function supportsHpVolumeSettings(firmwareVersion: number): boolean {
  return isFirmwareFeatureAvailable("hpVolumeSettings", firmwareVersion);
}

export function supportsPeqBandBypass(firmwareVersion: number): boolean {
  return isFirmwareFeatureAvailable("peqBandBypass", firmwareVersion);
}

/** 固件是否支持把扩展设备语言（索引 3..11）下发到设备。 */
export function supportsExtendedDeviceLanguages(firmwareVersion: number): boolean {
  return isFirmwareFeatureAvailable("extendedDeviceLanguages", firmwareVersion);
}

/** 固件是否支持屏幕亮度 10 档拖动条（screenLight 0–9，数值越大越亮）。 */
export function supportsScreenBrightnessSlider(firmwareVersion: number): boolean {
  return isFirmwareFeatureAvailable("screenBrightnessSlider", firmwareVersion);
}