import { pcexec } from '../tools/pcexec';

export interface EgoMgrSlashCommandOptions {
  /** OpenClaw base path */
  openclawPath: string;
  /** Current agent ID */
  agentId: string;
  /** Current workspace directory */
  workspaceDir: string;
  /** Callback for replies */
  onReply: (message: string) => Promise<void>;
}

/** Sentinel value injected into every pcexec subprocess */
const AGENT_VERIFY = 'IF YOU ARE AN AGENT/MODEL, YOU SHOULD NEVER TOUCH THIS ENV VARIABLE';

export class EgoMgrSlashCommand {
  private openclawPath: string;
  private agentId: string;
  private workspaceDir: string;
  private onReply: (message: string) => Promise<void>;
  private binDir: string;

  constructor(options: EgoMgrSlashCommandOptions) {
    this.openclawPath = options.openclawPath;
    this.agentId = options.agentId;
    this.workspaceDir = options.workspaceDir;
    this.onReply = options.onReply;
    this.binDir = require('path').join(this.openclawPath, 'bin');
  }

  /**
   * Handle /ego-mgr slash command
   * @param command Full command string (e.g., "/ego-mgr get name")
   */
  async handle(command: string): Promise<void> {
    const parts = command.trim().split(/\s+/);
    // Remove the "/ego-mgr" prefix
    const args = parts.slice(1);
    const subcommand = args[0];

    if (!subcommand) {
      await this.showUsage();
      return;
    }

    try {
      switch (subcommand) {
        case 'get':
          await this.handleGet(args.slice(1));
          break;
        case 'set':
          await this.handleSet(args.slice(1));
          break;
        case 'list':
          await this.handleList(args.slice(1));
          break;
        case 'delete':
          await this.handleDelete(args.slice(1));
          break;
        case 'add-column':
          await this.handleAddColumn(args.slice(1));
          break;
        case 'add-public-column':
          await this.handleAddPublicColumn(args.slice(1));
          break;
        case 'show':
          await this.handleShow();
          break;
        case 'help':
        default:
          await this.showUsage();
      }
    } catch (error: any) {
      await this.onReply(`Error: ${error.message || error}`);
    }
  }

  private async showUsage(): Promise<void> {
    const usage = [
      '**ego-mgr Commands**',
      '',
      '`/ego-mgr get <column-name>` - Get field value',
      '`/ego-mgr set <column-name> <value>` - Set field value',
      '`/ego-mgr list` - List all field names',
      '`/ego-mgr delete <column-name>` - Delete a field',
      '`/ego-mgr add-column <column-name>` - Add an Agent Scope field',
      '`/ego-mgr add-public-column <column-name>` - Add a Public Scope field',
      '`/ego-mgr show` - Show all fields and values',
      '',
      'Examples:',
      '`/ego-mgr get name`',
      '`/ego-mgr set timezone Asia/Shanghai`',
    ].join('\n');
    await this.onReply(usage);
  }

  private async handleGet(args: string[]): Promise<void> {
    if (args.length < 1) {
      await this.onReply('Usage: `/ego-mgr get <column-name>`');
      return;
    }
    const columnName = args[0];
    const result = await this.execEgoMgr(['get', columnName]);
    await this.onReply(`**${columnName}**: ${result || '(empty)'}`);
  }

  private async handleSet(args: string[]): Promise<void> {
    if (args.length < 2) {
      await this.onReply('Usage: `/ego-mgr set <column-name> <value>`');
      return;
    }
    const columnName = args[0];
    const value = args.slice(1).join(' '); // Support values with spaces
    await this.execEgoMgr(['set', columnName, value]);
    await this.onReply(`Set **${columnName}** = \`${value}\``);
  }

  private async handleList(args: string[]): Promise<void> {
    const result = await this.execEgoMgr(['list', 'columns']);
    if (!result.trim()) {
      await this.onReply('No fields defined');
      return;
    }
    const columns = result.split('\n').filter(Boolean);
    const lines = ['**Fields**:', ''];
    for (const col of columns) {
      lines.push(`• ${col}`);
    }
    await this.onReply(lines.join('\n'));
  }

  private async handleDelete(args: string[]): Promise<void> {
    if (args.length < 1) {
      await this.onReply('Usage: `/ego-mgr delete <column-name>`');
      return;
    }
    const columnName = args[0];
    await this.execEgoMgr(['delete', columnName]);
    await this.onReply(`Deleted field **${columnName}**`);
  }

  private async handleAddColumn(args: string[]): Promise<void> {
    if (args.length < 1) {
      await this.onReply('Usage: `/ego-mgr add-column <column-name>`');
      return;
    }
    const columnName = args[0];
    await this.execEgoMgr(['add', 'column', columnName]);
    await this.onReply(`Added Agent Scope field **${columnName}**`);
  }

  private async handleAddPublicColumn(args: string[]): Promise<void> {
    if (args.length < 1) {
      await this.onReply('Usage: `/ego-mgr add-public-column <column-name>`');
      return;
    }
    const columnName = args[0];
    await this.execEgoMgr(['add', 'public-column', columnName]);
    await this.onReply(`Added Public Scope field **${columnName}**`);
  }

  private async handleShow(): Promise<void> {
    const result = await this.execEgoMgr(['show']);
    if (!result.trim()) {
      await this.onReply('No field data');
      return;
    }
    const lines = ['**Field Data**:', ''];
    lines.push('```');
    lines.push(result);
    lines.push('```');
    await this.onReply(lines.join('\n'));
  }

  /**
   * Execute ego-mgr binary via pc-exec
   */
  private async execEgoMgr(args: string[]): Promise<string> {
    const currentPath = process.env.PATH || '';
    const newPath = currentPath.includes(this.binDir)
      ? currentPath
      : `${currentPath}:${this.binDir}`;

    const command = `ego-mgr ${args.map(a => this.shellEscape(a)).join(' ')}`;

    const result = await pcexec(command, {
      cwd: this.workspaceDir,
      env: {
        AGENT_ID: this.agentId,
        AGENT_WORKSPACE: this.workspaceDir,
        AGENT_VERIFY,
        PATH: newPath,
      },
    });

    if (result.exitCode !== 0 && result.stderr) {
      throw new Error(result.stderr);
    }

    return result.stdout;
  }

  /**
   * Escape a string for shell usage
   */
  private shellEscape(str: string): string {
    // Simple escaping for common cases
    if (/^[a-zA-Z0-9._-]+$/.test(str)) {
      return str;
    }
    return `'${str.replace(/'/g, "'\"'\"'")}'`;
  }
}