/**
 * Netlify Function: Get Available Slots
 * POST /functions/v1/get-available-slots - Busca horários disponíveis
 */

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

const SUPABASE_URL = "https://yuanqfswhberkoevtmfr.supabase.co";
const SUPABASE_ANON_KEY =
  "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6Inl1YW5xZnN3aGJlcmtvZXZ0bWZyIiwicm9sZSI6ImFub24iLCJpYXQiOjE3NTQ5NTQzNjksImV4cCI6MjA3MDUzMDM2OX0.g8Fm4XAvtX46zifBZnYVH4tVuQkqUH6Ia9CXQj4DztQ";

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

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

  try {
    const authHeader =
      event.headers.authorization || event.headers.Authorization;

    if (!authHeader) {
      return {
        statusCode: 401,
        headers,
        body: JSON.stringify({ error: "Token não fornecido" }),
      };
    }

    if (event.httpMethod === "POST") {
      const body = JSON.parse(event.body || "{}");

      // Validação dos campos obrigatórios
      if (!body.doctor_id || !body.start_date || !body.end_date) {
        return {
          statusCode: 400,
          headers,
          body: JSON.stringify({
            error: "Campos obrigatórios: doctor_id, start_date, end_date",
          }),
        };
      }

      const response = await fetch(
        `${SUPABASE_URL}/functions/v1/get-available-slots`,
        {
          method: "POST",
          headers: {
            apikey: SUPABASE_ANON_KEY,
            Authorization: authHeader,
            "Content-Type": "application/json",
          },
          body: JSON.stringify(body),
        }
      );

      const data = await response.json();

      return {
        statusCode: response.status,
        headers: {
          ...headers,
          "Content-Type": "application/json",
        },
        body: JSON.stringify(data),
      };
    }

    return {
      statusCode: 405,
      headers,
      body: JSON.stringify({ error: "Method Not Allowed" }),
    };
  } catch (error) {
    console.error("Erro na API de available slots:", error);

    return {
      statusCode: 500,
      headers,
      body: JSON.stringify({
        error: "Erro interno no servidor",
        message: error instanceof Error ? error.message : "Erro desconhecido",
      }),
    };
  }
};