/**
 * Netlify Function: Magic Link
 * Envia link de autenticação sem senha por email
 */

import type { Handler, HandlerEvent } from "@netlify/functions";

// Constantes da API (protegidas no backend)
const SUPABASE_URL = "https://yuanqfswhberkoevtmfr.supabase.co";
const SUPABASE_ANON_KEY =
  "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6Inl1YW5xZnN3aGJlcmtvZXZ0bWZyIiwicm9sZSI6ImFub24iLCJpYXQiOjE3NTQ5NTQzNjksImV4cCI6MjA3MDUzMDM2OX0.g8Fm4XAvtX46zifBZnYVH4tVuQkqUH6Ia9CXQj4DztQ";

interface MagicLinkRequest {
  email: string;
  redirect_url?: string;
}

export const handler: Handler = async (event: HandlerEvent) => {
  // CORS headers
  const headers = {
    "Access-Control-Allow-Origin": "*",
    "Access-Control-Allow-Headers": "Content-Type, Authorization",
    "Access-Control-Allow-Methods": "POST, OPTIONS",
  };

  // Handle preflight
  if (event.httpMethod === "OPTIONS") {
    return {
      statusCode: 200,
      headers,
      body: "",
    };
  }

  // Apenas POST é permitido
  if (event.httpMethod !== "POST") {
    return {
      statusCode: 405,
      headers,
      body: JSON.stringify({ error: "Method Not Allowed" }),
    };
  }

  try {
    // Parse body
    const body: MagicLinkRequest = JSON.parse(event.body || "{}");

    if (!body.email) {
      return {
        statusCode: 400,
        headers,
        body: JSON.stringify({ error: "Email é obrigatório" }),
      };
    }

    // Faz requisição para API Supabase COM a apikey protegida
    const response = await fetch(`${SUPABASE_URL}/auth/v1/otp`, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
        apikey: SUPABASE_ANON_KEY,
      },
      body: JSON.stringify({
        email: body.email,
        options: {
          emailRedirectTo:
            body.redirect_url ||
            "https://mediconnectbrasil.netlify.app/auth/callback",
        },
      }),
    });

    const data = await response.json();

    // Repassa a resposta para o frontend
    return {
      statusCode: response.status,
      headers: {
        ...headers,
        "Content-Type": "application/json",
      },
      body: JSON.stringify(data),
    };
  } catch (error) {
    console.error("[auth-magic-link] Erro:", error);
    return {
      statusCode: 500,
      headers,
      body: JSON.stringify({
        error: "Erro ao enviar magic link",
        details: error instanceof Error ? error.message : "Erro desconhecido",
      }),
    };
  }
};