import * as plugins from './plugins.js';
import * as paths from './paths.js';

export type TSambaShareAccess = 'read' | 'readWrite';

export interface ISambaAuthOptions {
  username: string;
  password: string;
  domain?: string;
}

export interface ISambaClientOptions {
  host: string;
  port?: number;
  auth?: Partial<ISambaAuthOptions>;
  timeoutMs?: number;
  compression?: boolean;
  dfsEnabled?: boolean;
}

export interface ISambaServerUser {
  username: string;
  password: string;
}

export interface ISambaServerShareUser {
  username: string;
  access?: TSambaShareAccess;
}

export interface ISambaServerShare {
  name: string;
  path: string;
  readOnly?: boolean;
  public?: boolean;
  users?: ISambaServerShareUser[];
  createIfMissing?: boolean;
}

export interface ISambaServerOptions {
  host?: string;
  port?: number;
  netbiosName?: string;
  users?: ISambaServerUser[];
  shares: ISambaServerShare[];
}

export interface ISambaServerStartResult {
  host: string;
  port: number;
  address: string;
  shares: string[];
}

export interface ISambaServerStatus {
  running: boolean;
  host?: string;
  port?: number;
  address?: string;
  shares: string[];
}

export interface ISambaDirectoryEntry {
  name: string;
  size: number;
  isDirectory: boolean;
  createdFiletime: number;
  modifiedFiletime: number;
}

export interface ISambaFileInfo {
  size: number;
  isDirectory: boolean;
  createdFiletime: number;
  modifiedFiletime: number;
  accessedFiletime: number;
}

export interface ISambaShareInfo {
  name: string;
  shareType: number;
  comment: string;
}

interface IRustSambaConnectionConfig {
  host: string;
  port?: number;
  username?: string;
  password?: string;
  domain?: string;
  timeoutMs?: number;
  compression?: boolean;
  dfsEnabled?: boolean;
}

type TRustSambaCommands = {
  startServer: { params: { config: ISambaServerOptions }; result: ISambaServerStartResult };
  stopServer: { params: Record<string, never>; result: Record<string, never> };
  getServerStatus: { params: Record<string, never>; result: ISambaServerStatus };
  listShares: { params: { connection: IRustSambaConnectionConfig }; result: { shares: ISambaShareInfo[] } };
  listDirectory: {
    params: { connection: IRustSambaConnectionConfig; share: string; path: string };
    result: { entries: ISambaDirectoryEntry[] };
  };
  readFile: {
    params: { connection: IRustSambaConnectionConfig; share: string; path: string };
    result: { dataBase64: string; size: number };
  };
  writeFile: {
    params: { connection: IRustSambaConnectionConfig; share: string; path: string; dataBase64: string };
    result: { bytesWritten: number };
  };
  deleteFile: {
    params: { connection: IRustSambaConnectionConfig; share: string; path: string };
    result: Record<string, never>;
  };
  createDirectory: {
    params: { connection: IRustSambaConnectionConfig; share: string; path: string };
    result: Record<string, never>;
  };
  rename: {
    params: { connection: IRustSambaConnectionConfig; share: string; from: string; to: string };
    result: Record<string, never>;
  };
  stat: {
    params: { connection: IRustSambaConnectionConfig; share: string; path: string };
    result: ISambaFileInfo;
  };
};

function getTsrustPlatformSuffix(): string | null {
  const archMap: Record<string, string> = { x64: 'amd64', arm64: 'arm64' };
  const osMap: Record<string, string> = { linux: 'linux', darwin: 'macos' };
  const os = osMap[process.platform];
  const arch = archMap[process.arch];
  return os && arch ? `${os}_${arch}` : null;
}

function buildLocalRustPaths(): string[] {
  const suffix = getTsrustPlatformSuffix();
  const localPaths: string[] = [];
  if (suffix) {
    localPaths.push(plugins.path.join(paths.packageDir, 'dist_rust', `rustsamba_${suffix}`));
  }
  localPaths.push(plugins.path.join(paths.packageDir, 'dist_rust', 'rustsamba'));
  localPaths.push(plugins.path.join(paths.packageDir, 'rust', 'target', 'release', 'rustsamba'));
  localPaths.push(plugins.path.join(paths.packageDir, 'rust', 'target', 'debug', 'rustsamba'));
  return localPaths;
}

class SambaBridge {
  private bridge = new plugins.smartrust.RustBridge<TRustSambaCommands>({
    binaryName: 'rustsamba',
    envVarName: 'SMARTSAMBA_RUST_BINARY',
    platformPackagePrefix: '@push.rocks/smartsamba',
    localPaths: buildLocalRustPaths(),
    readyTimeoutMs: 30000,
    requestTimeoutMs: 300000,
    maxPayloadSize: 128 * 1024 * 1024,
  });

  public async ensureRunning(): Promise<void> {
    if (this.bridge.running) {
      return;
    }
    const spawned = await this.bridge.spawn();
    if (!spawned) {
      throw new Error('Failed to spawn rustsamba binary. Run pnpm build or pnpm run test:before first.');
    }
  }

  public async sendCommand<K extends string & keyof TRustSambaCommands>(
    method: K,
    params: TRustSambaCommands[K]['params'],
  ): Promise<TRustSambaCommands[K]['result']> {
    await this.ensureRunning();
    return this.bridge.sendCommand(method, params);
  }

  public kill(): void {
    this.bridge.kill();
  }
}

function normalizeClientOptions(optionsArg: ISambaClientOptions): IRustSambaConnectionConfig {
  return {
    host: optionsArg.host,
    ...(optionsArg.port ? { port: optionsArg.port } : {}),
    ...(optionsArg.auth?.username ? { username: optionsArg.auth.username } : {}),
    ...(optionsArg.auth?.password ? { password: optionsArg.auth.password } : {}),
    ...(optionsArg.auth?.domain ? { domain: optionsArg.auth.domain } : {}),
    ...(optionsArg.timeoutMs ? { timeoutMs: optionsArg.timeoutMs } : {}),
    ...(typeof optionsArg.compression === 'boolean' ? { compression: optionsArg.compression } : {}),
    ...(typeof optionsArg.dfsEnabled === 'boolean' ? { dfsEnabled: optionsArg.dfsEnabled } : {}),
  };
}

export class SambaClient {
  private bridge = new SambaBridge();
  private connection: IRustSambaConnectionConfig;

  constructor(optionsArg: ISambaClientOptions) {
    this.connection = normalizeClientOptions(optionsArg);
  }

  public async start(): Promise<void> {
    await this.bridge.ensureRunning();
  }

  public async stop(): Promise<void> {
    this.bridge.kill();
  }

  public async listShares(): Promise<ISambaShareInfo[]> {
    const result = await this.bridge.sendCommand('listShares', { connection: this.connection });
    return result.shares;
  }

  public async listDirectory(shareArg: string, pathArg = ''): Promise<ISambaDirectoryEntry[]> {
    const result = await this.bridge.sendCommand('listDirectory', {
      connection: this.connection,
      share: shareArg,
      path: pathArg,
    });
    return result.entries;
  }

  public async readFile(shareArg: string, pathArg: string): Promise<Buffer> {
    const result = await this.bridge.sendCommand('readFile', {
      connection: this.connection,
      share: shareArg,
      path: pathArg,
    });
    return plugins.buffer.Buffer.from(result.dataBase64, 'base64');
  }

  public async readFileAsString(shareArg: string, pathArg: string, encoding: BufferEncoding = 'utf8') {
    const buffer = await this.readFile(shareArg, pathArg);
    return buffer.toString(encoding);
  }

  public async writeFile(shareArg: string, pathArg: string, dataArg: Buffer | string): Promise<number> {
    const buffer = typeof dataArg === 'string' ? plugins.buffer.Buffer.from(dataArg) : dataArg;
    const result = await this.bridge.sendCommand('writeFile', {
      connection: this.connection,
      share: shareArg,
      path: pathArg,
      dataBase64: buffer.toString('base64'),
    });
    return result.bytesWritten;
  }

  public async deleteFile(shareArg: string, pathArg: string): Promise<void> {
    await this.bridge.sendCommand('deleteFile', {
      connection: this.connection,
      share: shareArg,
      path: pathArg,
    });
  }

  public async createDirectory(shareArg: string, pathArg: string): Promise<void> {
    await this.bridge.sendCommand('createDirectory', {
      connection: this.connection,
      share: shareArg,
      path: pathArg,
    });
  }

  public async rename(shareArg: string, fromArg: string, toArg: string): Promise<void> {
    await this.bridge.sendCommand('rename', {
      connection: this.connection,
      share: shareArg,
      from: fromArg,
      to: toArg,
    });
  }

  public async stat(shareArg: string, pathArg: string): Promise<ISambaFileInfo> {
    return this.bridge.sendCommand('stat', {
      connection: this.connection,
      share: shareArg,
      path: pathArg,
    });
  }
}

export class SambaServer {
  private bridge = new SambaBridge();
  private config: ISambaServerOptions;
  private startResult?: ISambaServerStartResult;

  constructor(optionsArg: ISambaServerOptions) {
    this.config = {
      host: '127.0.0.1',
      port: 445,
      ...optionsArg,
    };
  }

  public async start(): Promise<ISambaServerStartResult> {
    this.startResult = await this.bridge.sendCommand('startServer', { config: this.config });
    return this.startResult;
  }

  public async stop(): Promise<void> {
    try {
      await this.bridge.sendCommand('stopServer', {} as Record<string, never>);
    } finally {
      this.bridge.kill();
      this.startResult = undefined;
    }
  }

  public async status(): Promise<ISambaServerStatus> {
    return this.bridge.sendCommand('getServerStatus', {} as Record<string, never>);
  }

  public getConnectionOptions(authArg?: Partial<ISambaAuthOptions>): ISambaClientOptions {
    if (!this.startResult) {
      throw new Error('SambaServer is not started');
    }
    return {
      host: this.startResult.host,
      port: this.startResult.port,
      auth: authArg,
    };
  }
}