stack/apps/api/src/app.controller.ts

import { Controller, Get } from "@nestjs/common";
import { AppService } from "./app.service";
import { PrismaService } from "./prisma/prisma.service";
import type { ApiResponse, HealthStatus } from "@mosaic/shared";
import { successResponse } from "@mosaic/shared";

@Controller()
export class AppController {
  constructor(
    private readonly appService: AppService,
    private readonly prisma: PrismaService
  ) {}

  @Get()
  getHello(): string {
    return this.appService.getHello();
  }

  @Get("health")
  async getHealth(): Promise<ApiResponse<HealthStatus>> {
    const dbHealthy = await this.prisma.isHealthy();
    const dbInfo = await this.prisma.getConnectionInfo();

    const overallStatus = dbHealthy ? "healthy" : "degraded";
    const packageVersion = process.env.npm_package_version;

    return successResponse({
      status: overallStatus,
      timestamp: new Date().toISOString(),
      ...(packageVersion && { version: packageVersion }),
      checks: {
        database: {
          status: dbHealthy ? "healthy" : "unhealthy",
          message: dbInfo.connected
            ? `Connected to ${dbInfo.database ?? "unknown"} (${dbInfo.version ?? "unknown"})`
            : "Database connection failed",
        },
      },
    });
  }
}