import type { Express, Request, Response } from "express";
import { createServer, type Server } from "http";
import { storage } from "./storage";
import { setupAuth } from "./auth";
import { 
  insertNewsletterSchema, 
  insertContactMessageSchema,
  insertBookingSchema
} from "@shared/schema";
import { z } from "zod";

export async function registerRoutes(app: Express): Promise<Server> {
  // Set up authentication routes
  setupAuth(app);

  // API Routes
  // ----------

  // Classes
  app.get("/api/classes", async (_req, res) => {
    try {
      const classes = await storage.getClasses();
      res.json(classes);
    } catch (error) {
      res.status(500).json({ message: "Failed to fetch classes" });
    }
  });

  app.get("/api/classes/:id", async (req, res) => {
    try {
      const id = parseInt(req.params.id);
      if (isNaN(id)) {
        return res.status(400).json({ message: "Invalid class ID" });
      }
      
      const classData = await storage.getClass(id);
      if (!classData) {
        return res.status(404).json({ message: "Class not found" });
      }
      
      res.json(classData);
    } catch (error) {
      res.status(500).json({ message: "Failed to fetch class" });
    }
  });

  // Bookings
  app.get("/api/bookings", async (req: Request, res: Response) => {
    if (!req.isAuthenticated()) {
      return res.status(401).json({ message: "Unauthorized" });
    }
    
    try {
      const bookings = await storage.getBookings(req.user.id);
      res.json(bookings);
    } catch (error) {
      res.status(500).json({ message: "Failed to fetch bookings" });
    }
  });

  app.post("/api/bookings", async (req: Request, res: Response) => {
    if (!req.isAuthenticated()) {
      return res.status(401).json({ message: "Unauthorized" });
    }
    
    try {
      const bookingData = insertBookingSchema.parse({
        ...req.body,
        userId: req.user.id
      });
      
      const booking = await storage.createBooking(bookingData);
      res.status(201).json(booking);
    } catch (error) {
      if (error instanceof z.ZodError) {
        return res.status(400).json({ message: "Invalid booking data", errors: error.errors });
      }
      res.status(500).json({ message: "Failed to create booking" });
    }
  });

  // Newsletter signup
  app.post("/api/newsletter", async (req, res) => {
    try {
      const newsletterData = insertNewsletterSchema.parse(req.body);
      
      // Check if email already exists
      const existingNewsletter = await storage.getNewsletterByEmail(newsletterData.email);
      if (existingNewsletter) {
        return res.status(400).json({ message: "Email already subscribed" });
      }
      
      const newsletter = await storage.createNewsletter(newsletterData);
      
      // In a real app, we'd integrate with MailChimp API here
      // mailchimpClient.lists.addListMember(MAILCHIMP_LIST_ID, {
      //   email_address: newsletterData.email,
      //   status: "subscribed",
      // });
      
      res.status(201).json({ message: "Successfully subscribed to the newsletter" });
    } catch (error) {
      if (error instanceof z.ZodError) {
        return res.status(400).json({ message: "Invalid newsletter data", errors: error.errors });
      }
      res.status(500).json({ message: "Failed to subscribe to newsletter" });
    }
  });

  // Contact form
  app.post("/api/contact", async (req, res) => {
    try {
      const contactData = insertContactMessageSchema.parse(req.body);
      const message = await storage.createContactMessage(contactData);
      
      // In a real app, we'd send an email here
      // sendEmail({
      //   to: "hello@pilateswithfadia.com",
      //   from: contactData.email,
      //   subject: contactData.subject || "New contact form submission",
      //   text: `Name: ${contactData.name}\nEmail: ${contactData.email}\nMessage: ${contactData.message}`
      // });
      
      res.status(201).json({ message: "Message sent successfully" });
    } catch (error) {
      if (error instanceof z.ZodError) {
        return res.status(400).json({ message: "Invalid contact data", errors: error.errors });
      }
      res.status(500).json({ message: "Failed to send message" });
    }
  });

  const httpServer = createServer(app);
  return httpServer;
}