import * as plugins from './plugins.js';
import * as interfaces from './smartagent.interfaces.js';
import { BaseToolWrapper } from './smartagent.tools.base.js';

/**
 * Deno permission types for sandboxed code execution
 */
export type TDenoPermission =
  | 'all'
  | 'env'
  | 'ffi'
  | 'hrtime'
  | 'net'
  | 'read'
  | 'run'
  | 'sys'
  | 'write';

/**
 * Deno tool for executing TypeScript/JavaScript code in a sandboxed environment
 * Wraps @push.rocks/smartdeno
 */
export class DenoTool extends BaseToolWrapper {
  public name = 'deno';
  public description =
    'Execute TypeScript/JavaScript code in a sandboxed Deno environment with fine-grained permission control';

  public actions: interfaces.IToolAction[] = [
    {
      name: 'execute',
      description:
        'Execute TypeScript/JavaScript code and return stdout/stderr. Code runs in Deno sandbox with specified permissions.',
      parameters: {
        type: 'object',
        properties: {
          code: {
            type: 'string',
            description: 'TypeScript/JavaScript code to execute',
          },
          permissions: {
            type: 'array',
            items: {
              type: 'string',
              enum: ['all', 'env', 'ffi', 'hrtime', 'net', 'read', 'run', 'sys', 'write'],
            },
            description:
              'Deno permissions to grant. Default: none (fully sandboxed). Options: all, env, net, read, write, run, sys, ffi, hrtime',
          },
        },
        required: ['code'],
      },
    },
    {
      name: 'executeWithResult',
      description:
        'Execute code that outputs JSON on the last line of stdout. The JSON is parsed and returned as the result.',
      parameters: {
        type: 'object',
        properties: {
          code: {
            type: 'string',
            description:
              'Code that console.logs a JSON value on the final line. This JSON will be parsed and returned.',
          },
          permissions: {
            type: 'array',
            items: {
              type: 'string',
              enum: ['all', 'env', 'ffi', 'hrtime', 'net', 'read', 'run', 'sys', 'write'],
            },
            description: 'Deno permissions to grant',
          },
        },
        required: ['code'],
      },
    },
  ];

  private smartdeno!: plugins.smartdeno.SmartDeno;

  public async initialize(): Promise<void> {
    this.smartdeno = new plugins.smartdeno.SmartDeno();
    await this.smartdeno.start();
    this.isInitialized = true;
  }

  public async cleanup(): Promise<void> {
    if (this.smartdeno) {
      await this.smartdeno.stop();
    }
    this.isInitialized = false;
  }

  public async execute(
    action: string,
    params: Record<string, unknown>
  ): Promise<interfaces.IToolExecutionResult> {
    this.validateAction(action);
    this.ensureInitialized();

    try {
      const code = params.code as string;
      const permissions = (params.permissions as TDenoPermission[]) || [];

      // Execute the script
      const result = await this.smartdeno.executeScript(code, {
        permissions,
      });

      switch (action) {
        case 'execute': {
          return {
            success: result.exitCode === 0,
            result: {
              exitCode: result.exitCode,
              stdout: result.stdout,
              stderr: result.stderr,
              permissions,
            },
          };
        }

        case 'executeWithResult': {
          if (result.exitCode !== 0) {
            return {
              success: false,
              error: `Script failed with exit code ${result.exitCode}: ${result.stderr}`,
            };
          }

          // Parse the last line of stdout as JSON
          const lines = result.stdout.trim().split('\n');
          const lastLine = lines[lines.length - 1];

          try {
            const parsedResult = JSON.parse(lastLine);
            return {
              success: true,
              result: {
                parsed: parsedResult,
                stdout: result.stdout,
                stderr: result.stderr,
              },
            };
          } catch (parseError) {
            return {
              success: false,
              error: `Failed to parse JSON from last line of output: ${lastLine}`,
            };
          }
        }

        default:
          return {
            success: false,
            error: `Unknown action: ${action}`,
          };
      }
    } catch (error) {
      return {
        success: false,
        error: error instanceof Error ? error.message : String(error),
      };
    }
  }

  public getCallSummary(action: string, params: Record<string, unknown>): string {
    const code = params.code as string;
    const permissions = (params.permissions as string[]) || [];

    // Create a preview of the code (first 100 chars)
    const codePreview = code.length > 100 ? code.substring(0, 100) + '...' : code;
    // Escape newlines for single-line display
    const cleanPreview = codePreview.replace(/\n/g, '\\n');

    const permissionInfo = permissions.length > 0
      ? ` [permissions: ${permissions.join(', ')}]`
      : ' [sandboxed - no permissions]';

    switch (action) {
      case 'execute':
        return `Execute Deno code${permissionInfo}: "${cleanPreview}"`;

      case 'executeWithResult':
        return `Execute Deno code and parse JSON result${permissionInfo}: "${cleanPreview}"`;

      default:
        return `Unknown action: ${action}`;
    }
  }
}