// js/iaConfigModule.js
const defaultConfig = {
  llm: {
    provider: "deepseek",
    apiKeys: { deepseek: "", openai: "" },
    model: "deepseek-chat"
  },
  transcription: {
    provider: "openai",
    apiKeys: { openai: "", deepgram: "" },
    models: { openai: "whisper-1", deepgram: "nova-2" }
  }
};

// CORRECCIÓN: Nombres de modelos de OpenAI actualizados con tus nuevas solicitudes.
export const llmProviders = [
  { name: "OpenAI", value: "openai", models: ["gpt-4o", "gpt-4o-mini", "gpt-5-mini", "gpt-5", "gpt-5-nano"], url: "https://api.openai.com" },
  { name: "DeepSeek", value: "deepseek", models: ["deepseek-chat", "deepseek-reasoner"], url: "https://api.deepseek.com" }
];
export const transcriptionProviders = [
  { name: "OpenAI Whisper", value: "openai", models: ["whisper-1"], url: "https://api.openai.com" },
  { name: "Deepgram", value: "deepgram", models: ["nova-2", "whisper-large"], url: "https://api.deepgram.com" }
];
function saveConfig(config) {
  try {
    localStorage.setItem("iaConfig", JSON.stringify(config));
  } catch (e) {
    console.error("[iaConfigModule] Error guardando la configuración:", e);
  }
}

function clone(obj) {
  // structuredClone es moderno y robusto, con un fallback seguro.
  try {
    return structuredClone(obj);
  } catch (e) {
    return JSON.parse(JSON.stringify(obj));
  }
}

function loadConfig() {
  let config;
  try {
    const storedConfig = localStorage.getItem("iaConfig");
    config = storedConfig ?
      JSON.parse(storedConfig) : clone(defaultConfig);
  } catch (error) {
    console.error("[iaConfigModule] Error al parsear config, usando defaults.", error);
    config = clone(defaultConfig);
  }

  let needsSave = false;

  if (config.transcription.apiKey !== undefined) {
    console.log("[iaConfigModule] Migrando config antigua de transcripción...");
    const oldKey = config.transcription.apiKey;
    const oldModel = config.transcription.model;
    const oldProvider = config.transcription.provider;
    // Se usa el spread operator para no perder las keys de otros proveedores.
    config.transcription.apiKeys = { ...defaultConfig.transcription.apiKeys, [oldProvider]: oldKey };
    config.transcription.models = { ...defaultConfig.transcription.models, [oldProvider]: oldModel };
    delete config.transcription.apiKey;
    delete config.transcription.model;
    needsSave = true;
  }

  if (config.llm.apiKey !== undefined) {
    console.log("[iaConfigModule] Migrando config antigua de LLM...");
    const old = config.llm.apiKey;
    config.llm.apiKeys = { ...defaultConfig.llm.apiKeys, [config.llm.provider]: old };
    delete config.llm.apiKey;
    needsSave = true;
  }

  if (config.llm.provider === 'deepseek' && (config.llm.model === 'deepseek-v3' || config.llm.model === 'deepseek-llm')) {
    config.llm.model = 'deepseek-chat';
    needsSave = true;
  }
  
  if (needsSave) {
    saveConfig(config);
  }
  
  return config;
}

export function getIaConfig() {
  return loadConfig();
}

export function renderIaConfigForm(containerId) {
  let config = loadConfig();
  const container = document.getElementById(containerId);
  if (!container) {
    console.error(`[iaConfigModule] No se encontró el contenedor '${containerId}'`);
    document.body.insertAdjacentHTML('beforeend', `<div style='color:red; padding: 1rem;'>[Error] No se encontró el contenedor '${containerId}' para la configuración IA.</div>`);
    return;
  }

  function maskApiKey(key) {
    if (!key) return '';
    if (key.length <= 8) return '*'.repeat(key.length);
    return `${key.substring(0, 3)}-****-${key.slice(-4)}`;
  }

  container.innerHTML = `
    <div class="flex justify-between items-center mb-6 border-b pb-2 border-blue-100">
      <h2 class="text-xl font-bold text-blue-700 flex items-center"><i class='fas fa-cogs mr-2'></i>Configurar Proveedores IA</h2>
      <button id="btnCloseConfig" type="button" class="text-gray-500 hover:text-blue-600 text-2xl focus:outline-none" aria-label="Cerrar"><i class="fas fa-times"></i></button>
    </div>
    <form id="iaConfigForm" class="space-y-6">
      <div class="bg-blue-50 p-4 rounded-lg border border-blue-100">
        <label class="block font-semibold text-blue-800 mb-2">Proveedor LLM</label>
        <select id="llmProvider" class="w-full mb-3 p-2 rounded border border-gray-300 focus:ring-2 focus:ring-blue-300">${llmProviders.map(p => `<option value="${p.value}">${p.name}</option>`).join("")}</select>
  
        <div class="flex items-center mb-3">
          <input type="password" id="llmApiKey" class="flex-1 p-2 rounded border border-gray-300 mr-2 bg-gray-100" placeholder="API Key LLM" autocomplete="off">
          <button class="text-blue-700 hover:text-blue-900 px-3 py-2 rounded focus:outline-none border border-blue-200 bg-white" type="button" id="toggleLlmApiKey"><i class="fas fa-eye"></i></button>
        </div>
        <select id="llmModel" class="w-full p-2 rounded border border-gray-300 focus:ring-2 focus:ring-blue-300"></select>
      </div>
      <div class="bg-purple-50 p-4 rounded-lg border border-purple-100">
    
        <label class="block font-semibold text-purple-800 mb-2">Proveedor Transcripción</label>
        <select id="transProvider" class="w-full mb-3 p-2 rounded border border-gray-300 focus:ring-2 focus:ring-purple-300">${transcriptionProviders.map(p => `<option value="${p.value}">${p.name}</option>`).join("")}</select>
        <div class="flex items-center mb-3">
          <input type="password" id="transApiKey" class="flex-1 p-2 rounded border border-gray-300 mr-2 bg-gray-100" placeholder="API Key Transcripción" autocomplete="off">
          <button class="text-purple-700 hover:text-purple-900 px-3 py-2 rounded focus:outline-none border border-purple-200 bg-white" type="button" id="toggleTransApiKey"><i class="fas fa-eye"></i></button>
        </div>
      
        <select id="transModel" class="w-full p-2 rounded border border-gray-300 focus:ring-2 focus:ring-purple-300"></select>
      </div>
      <button type="submit" class="w-full bg-blue-600 hover:bg-blue-700 text-white font-semibold py-3 rounded-lg shadow transition-colors flex items-center justify-center text-lg"><i class="fas fa-save mr-2"></i>Guardar configuración</button>
    </form>
  `;
  // Elementos del DOM
  const llmProviderSelect = document.getElementById("llmProvider");
  const llmModelSelect = document.getElementById("llmModel");
  const llmApiKeyInput = document.getElementById("llmApiKey");
  const transProviderSelect = document.getElementById("transProvider");
  const transModelSelect = document.getElementById("transModel");
  const transApiKeyInput = document.getElementById("transApiKey");

  // Listeners
  document.getElementById("btnCloseConfig")?.addEventListener("click", () => document.getElementById("configModal")?.classList.remove("active"));
  document.getElementById("toggleLlmApiKey").addEventListener("click", () => { llmApiKeyInput.type = llmApiKeyInput.type === "password" ? "text" : "password"; });
  document.getElementById("toggleTransApiKey").addEventListener("click", () => { transApiKeyInput.type = transApiKeyInput.type === "password" ? "text" : "password"; });
  
  function updateLlmUI() {
    const selectedProvider = llmProviderSelect.value;
    const providerObj = llmProviders.find(p => p.value === selectedProvider);
    if (!providerObj) return;

    llmModelSelect.innerHTML = providerObj.models.map(m => `<option value="${m}">${m}</option>`).join("");
    
    let modelToSelect = providerObj.models[0];
    if (selectedProvider === config.llm.provider) {
        if (providerObj.models.includes(config.llm.model)) {
            modelToSelect = config.llm.model;
        }
    }
    llmModelSelect.value = modelToSelect;
    
    llmApiKeyInput.value = maskApiKey(config.llm.apiKeys[selectedProvider] || '');
  }

  function updateTransUI() {
    const selectedProvider = transProviderSelect.value;
    const providerObj = transcriptionProviders.find(p => p.value === selectedProvider);
    if (!providerObj) return;
    
    transModelSelect.innerHTML = providerObj.models.map(m => `<option value="${m}">${m}</option>`).join("");
    transModelSelect.value = config.transcription.models[selectedProvider] || providerObj.models[0];
    transApiKeyInput.value = maskApiKey(config.transcription.apiKeys[selectedProvider] || '');
  }

  llmProviderSelect.addEventListener("change", updateLlmUI);
  transProviderSelect.addEventListener("change", updateTransUI);
  
  // Estado inicial del formulario
  llmProviderSelect.value = config.llm.provider;
  transProviderSelect.value = config.transcription.provider;
  updateLlmUI();
  updateTransUI();
  
  // Guardar configuración
  document.getElementById("iaConfigForm").addEventListener("submit", e => {
    e.preventDefault();
    const prevConfig = config;
    const newConfig = clone(prevConfig);

    const llmProv = llmProviderSelect.value;
    const rawLlmKey = llmApiKeyInput.value;
    const oldLlmKey = prevConfig.llm.apiKeys[llmProv] || '';
    const actualLlmKey = rawLlmKey === maskApiKey(oldLlmKey) ? oldLlmKey : rawLlmKey;
    newConfig.llm = {
        ...prevConfig.llm,
        provider: llmProv,
        model: llmModelSelect.value,
        apiKeys: { ...prevConfig.llm.apiKeys, [llmProv]: actualLlmKey }
    };

    const transProv = transProviderSelect.value;
    const rawTransKey = transApiKeyInput.value;
    const oldTransKey = prevConfig.transcription.apiKeys[transProv] || '';
    const actualTransKey = rawTransKey === maskApiKey(oldTransKey) ? oldTransKey : rawTransKey;
    newConfig.transcription = {
        ...prevConfig.transcription,
        provider: transProv,
        models: { ...prevConfig.transcription.models, [transProv]: transModelSelect.value },
        apiKeys: { ...prevConfig.transcription.apiKeys, [transProv]: actualTransKey }
    };
    
    saveConfig(newConfig);
    config = newConfig; 
    
    document.dispatchEvent(new CustomEvent('iaConfigChanged'));

    llmApiKeyInput.value = maskApiKey(newConfig.llm.apiKeys[newConfig.llm.provider] || '');
    transApiKeyInput.value = maskApiKey(newConfig.transcription.apiKeys[newConfig.transcription.provider] || '');
    llmApiKeyInput.type = "password";
    transApiKeyInput.type = "password";
    
    let msg = document.getElementById('iaConfigSavedMsg');
    if (!msg) {
        msg = document.createElement('div');
        msg.id = 'iaConfigSavedMsg';
        msg.className = 'fixed left-1/2 top-6 -translate-x-1/2 bg-green-500 text-white px-6 py-3 rounded shadow-lg text-lg z-50';
        msg.innerHTML = '<i class="fas fa-check-circle mr-2"></i>¡Configuración guardada!';
        document.body.appendChild(msg);
    }
    msg.style.display = 'block';
    setTimeout(() => { msg.style.display = 'none'; }, 2000);
    
    document.getElementById("configModal")?.classList.remove("active");
  });
}