import { NestFactory } from "@nestjs/core";
import { SwaggerModule, DocumentBuilder } from "@nestjs/swagger";
import { writeFileSync, mkdirSync } from "fs";
import { join } from "path";
import { OpenApiModule } from "./openapi.module";

async function generate() {
  try {
    console.log("Creating NestJS application...");
    const app = await NestFactory.create(OpenApiModule, { logger: false });

    console.log("Building OpenAPI config...");
    const config = new DocumentBuilder()
      .setTitle("Customer Portal API")
      .setDescription("Backend for Frontend API for customer portal")
      .setVersion("1.0")
      .addBearerAuth()
      .build();

    console.log("Generating OpenAPI document...");
    const document = SwaggerModule.createDocument(app, config);
    
    console.log("Writing OpenAPI file...");
    const outDir = join(process.cwd(), "openapi");
    mkdirSync(outDir, { recursive: true });
    writeFileSync(join(outDir, "openapi.json"), JSON.stringify(document, null, 2));
    
    console.log("OpenAPI generation completed successfully!");
    await app.close();
  } catch (error) {
    console.error("Error generating OpenAPI:", error);
    process.exit(1);
  }
}

void generate();