import { createErrorResponse } from '../utils';

export async function onRequestPost(context) {
  try {
    const { request, env } = context;

    const { username, password } = await request.json();

    if (!username || !password) {
      return createErrorResponse("Missing username or password", 400);
    }

    if (username.length < 3) {
      return createErrorResponse("Username must be at least 3 characters", 400);
    }

    if (password.length < 8) {
      return createErrorResponse("Password must be at least 8 characters", 400);
    }

    if (!/^[a-zA-Z0-9]+$/.test(username)) {
      return createErrorResponse("Username must be alphanumeric", 400);
    }

    // Check if the username already exists
    const { results: existingUsers } = await env.DB.prepare("SELECT id FROM users WHERE username = ?").bind(username).all();
    if (existingUsers.length > 0) {
      return createErrorResponse("Username already exists", 400);
    }

    // Store the username and password in D1
    await env.DB.prepare("INSERT INTO users (username, password, avatar) VALUES (?, ?, ?)").bind(username, password, "avatars/default.png").run();

    // Get the user ID
    const { results } = await env.DB.prepare("SELECT id FROM users WHERE username = ?").bind(username).all();
    const userId = results[0].id;

    // Registration successful, return success response
    return new Response(
      JSON.stringify({
        success: true,
        message: "Registration successful. Please login.",
      }),
      {
        headers: { "Content-Type": "application/json" },
      }
    );
  } catch (error) {
    console.error("Registration error:", error);
    return createErrorResponse("Server Error", 500);
  }
}