import Fastify from "fastify";
import cors from "@fastify/cors";
import helmet from "@fastify/helmet";
import rateLimit from "@fastify/rate-limit";
import jwt from "@fastify/jwt";
import cookie from "@fastify/cookie";
import { env } from "@/config/env.js";
import { RATE_LIMITS } from "@/config/constants.js";
import { authRoutes } from "@/routes/auth.routes.js";
import { storeRoutes } from "@/routes/store.routes.js";
import { paymentRoutes } from "@/routes/payment.routes.js";
import { feedbackRoutes, adminFeedbackRoutes } from "@/routes/feedback.routes.js";
import { externalApiRoutes } from "@/routes/external.routes.js";
import { adminProductsRoutes } from "@/routes/admin/products.routes.js";
import { adminStockRoutes } from "@/routes/admin/stock.routes.js";
import { adminOrdersRoutes } from "@/routes/admin/orders.routes.js";
import { adminCouponsRoutes } from "@/routes/admin/coupons.routes.js";
import { adminCategoriesRoutes } from "@/routes/admin/categories.routes.js";
import { adminCustomersRoutes } from "@/routes/admin/customers.routes.js";
import { adminAnalyticsRoutes } from "@/routes/admin/analytics.routes.js";
import { adminSettingsRoutes } from "@/routes/admin/settings.routes.js";
import { adminBlacklistRoutes } from "@/routes/admin/blacklist.routes.js";
import { adminWebhooksRoutes } from "@/routes/admin/webhooks.routes.js";
import { adminApiKeysRoutes } from "@/routes/admin/apikeys.routes.js";
import { adminAuditLogRoutes } from "@/routes/admin/auditlog.routes.js";
import { healthRoutes } from "@/routes/health.routes.js";

export async function buildApp() {
  const app = Fastify({
    logger: {
      level: env.NODE_ENV === "development" ? "debug" : "info",
      transport:
        env.NODE_ENV === "development"
          ? { target: "pino-pretty", options: { colorize: true } }
          : undefined,
    },
    trustProxy: true,
  });

  await app.register(cors, {
    origin: [env.FRONTEND_URL],
    credentials: true,
    methods: ["GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"],
  });

  await app.register(helmet, {
    contentSecurityPolicy: false,
  });

  await app.register(rateLimit, {
    max: RATE_LIMITS.STORE.max,
    timeWindow: RATE_LIMITS.STORE.timeWindow,
  });

  await app.register(jwt, {
    secret: env.JWT_SECRET,
  });

  await app.register(cookie, {
    secret: env.JWT_SECRET,
  });

  await app.register(healthRoutes, { prefix: "/api/health" });
  await app.register(authRoutes, { prefix: "/api/admin/auth" });
  await app.register(storeRoutes, { prefix: "/api/store" });
  await app.register(feedbackRoutes, { prefix: "/api/store" });
  await app.register(paymentRoutes, { prefix: "/api/webhooks" });
  await app.register(externalApiRoutes, { prefix: "/api/v1" });
  
  await app.register(adminProductsRoutes, { prefix: "/api/admin/products" });
  await app.register(adminStockRoutes, { prefix: "/api/admin" });
  await app.register(adminOrdersRoutes, { prefix: "/api/admin/orders" });
  await app.register(adminCouponsRoutes, { prefix: "/api/admin/coupons" });
  await app.register(adminCategoriesRoutes, { prefix: "/api/admin/categories" });
  await app.register(adminCustomersRoutes, { prefix: "/api/admin/customers" });
  await app.register(adminAnalyticsRoutes, { prefix: "/api/admin/analytics" });
  await app.register(adminSettingsRoutes, { prefix: "/api/admin/settings" });
  await app.register(adminBlacklistRoutes, { prefix: "/api/admin/blacklist" });
  await app.register(adminWebhooksRoutes, { prefix: "/api/admin/webhooks" });
  await app.register(adminApiKeysRoutes, { prefix: "/api/admin/apikeys" });
  await app.register(adminAuditLogRoutes, { prefix: "/api/admin/audit-log" });
  await app.register(adminFeedbackRoutes, { prefix: "/api/admin/feedback" });

  app.setErrorHandler((error, request, reply) => {
    request.log.error(error);

    if (error.validation) {
      return reply.status(400).send({
        success: false,
        error: "Validation Error",
        details: error.validation,
      });
    }

    const statusCode = error.statusCode ?? 500;
    const message = statusCode === 500 ? "Internal Server Error" : error.message;

    return reply.status(statusCode).send({
      success: false,
      error: message,
    });
  });

  app.setNotFoundHandler((request, reply) => {
    return reply.status(404).send({
      success: false,
      error: "Route not found",
    });
  });

  return app;
}