// 许可证类型
export type LicenseType = 'FREE' | 'STANDARD' | 'PRO';

// 许可证配置
export interface LicenseConfig {
  type: LicenseType;
  limits: {
    maxUsers: number;      // -1 表示无限
    maxMaterials: number;  // -1 表示无限
  };
  features: {
    customTemplates: boolean;
    systemSettings: boolean;
    departmentIsolation: boolean;
    apiAccess: boolean;
    intranetPenetration: boolean;
  };
  expiresAt: string | null;  // ISO 日期字符串，null 表示永久
}

// 签名后的许可证
export interface SignedLicense {
  data: LicenseConfig & { issuedAt: string };
  signature: string;
  issuedAt: string;
}

// 硬件指纹
export interface HardwareFingerprint {
  machineId: string;
  hostname: string;
  macAddress: string;
  cpuId?: string;
  instanceId: string;
}

// 激活请求
export interface ActivateRequest {
  licenseKey: string;
  fingerprint: HardwareFingerprint;
  timestamp: number;
}

// 激活响应
export interface ActivateResponse {
  success: boolean;
  license?: SignedLicense;
  error?: string;
}

// 验证请求
export interface VerifyRequest {
  instanceId: string;
  fingerprint: HardwareFingerprint;
  timestamp: number;
  signature: string;
}

// 验证响应
export interface VerifyResponse {
  valid: boolean;
  license?: SignedLicense;
  error?: string;
}

// 心跳请求
export interface HeartbeatRequest {
  instanceId: string;
  fingerprint: HardwareFingerprint;
  usage: {
    userCount: number;
    materialCount: number;
  };
  timestamp: number;
  signature: string;
}

// 心跳响应
export interface HeartbeatResponse {
  acknowledged: boolean;
  license?: SignedLicense;
}

// 版本检查响应
export interface VersionCheckResponse {
  latestVersion: string;
  minRequiredVersion: string | null;
  releaseNotes: string | null;
  releaseDate: string;
  isSecurityUpdate: boolean;
  isCriticalUpdate: boolean;
  downloadSize: string | null;
}

// 各版本的默认配置
export const LICENSE_CONFIGS: Record<LicenseType, Omit<LicenseConfig, 'expiresAt'>> = {
  FREE: {
    type: 'FREE',
    limits: {
      maxUsers: 10,
      maxMaterials: 100,
    },
    features: {
      customTemplates: false,
      systemSettings: false,
      departmentIsolation: false,
      apiAccess: false,
      intranetPenetration: false,
    },
  },
  STANDARD: {
    type: 'STANDARD',
    limits: {
      maxUsers: -1,
      maxMaterials: -1,
    },
    features: {
      customTemplates: true,
      systemSettings: true,
      departmentIsolation: true,
      apiAccess: true,
      intranetPenetration: false,
    },
  },
  PRO: {
    type: 'PRO',
    limits: {
      maxUsers: -1,
      maxMaterials: -1,
    },
    features: {
      customTemplates: true,
      systemSettings: true,
      departmentIsolation: true,
      apiAccess: true,
      intranetPenetration: true,
    },
  },
};

/**
 * 根据许可证类型生成配置
 */
export function generateLicenseConfig(
  type: LicenseType,
  expiresAt?: Date | null
): LicenseConfig {
  const baseConfig = LICENSE_CONFIGS[type];
  return {
    ...baseConfig,
    expiresAt: expiresAt ? expiresAt.toISOString() : null,
  };
}