import { escapeHtml, renderRichText } from "/chatclient/richText.js";

export function renderAttachments(card, container, summary, attachments, onRemove, onPreview) {
  summary.textContent = buildAttachmentSummary(attachments);
  container.innerHTML = "";

  if (attachments.length === 0) {
    container.innerHTML = '<p class="empty-state">Add an image or audio file or link to include it with the next request.</p>';
    return;
  }

  for (const attachment of attachments) {
    const card = document.createElement("article");
    card.className = "attachment-item";
    card.appendChild(renderAttachmentPreview(attachment, onPreview));
    card.appendChild(renderAttachmentMeta(attachment));
    card.appendChild(renderRemoveButton(attachment.id, onRemove));
    container.appendChild(card);
  }
}

export function renderResponse(container, requestPayload, responseBody) {
  const assistant = responseBody?.choices?.[0]?.message ?? {};
  const text = extractAssistantText(assistant);
  const audioTranscript = extractAssistantAudioTranscript(assistant);
  const images = extractAssistantImages(assistant);
  const audioUrl = assistant?.audio?.url || null;
  const assistantBody = text || audioTranscript || "No assistant text returned.";

  container.innerHTML = "";
  container.appendChild(renderInfoCard("Request", describeRequest(requestPayload)));
  container.appendChild(renderRichTextCard("Assistant", assistantBody));

  if (audioTranscript && !sameText(text, audioTranscript)) {
    container.appendChild(renderRichTextCard("Audio Transcript", audioTranscript));
  }

  for (const imageUrl of images) {
    const imageCard = renderInfoCard("Image", imageUrl);
    const image = document.createElement("img");
    image.src = imageUrl;
    image.alt = "assistant output";
    image.className = "response-image";
    imageCard.appendChild(image);
    container.appendChild(imageCard);
  }

  if (audioUrl) {
    const audioCard = renderInfoCard("Audio", audioUrl);
    const audio = document.createElement("audio");
    audio.controls = true;
    audio.src = audioUrl;
    audio.className = "response-audio";
    audioCard.appendChild(audio);
    container.appendChild(audioCard);
  }
}

export function setStatus(statusLine, message, isOk = false) {
  statusLine.textContent = message;
  statusLine.classList.toggle("status-ok", isOk);
  statusLine.classList.toggle("status-busy", !isOk && /sending/i.test(message));
}

export function showError(errorToast, message) {
  const code = `ERR-${Date.now().toString(36).toUpperCase()}`;
  errorToast.hidden = false;
  errorToast.textContent = `${message} Click to copy ${code}.`;
  errorToast.onclick = async () => {
    try {
      await navigator.clipboard.writeText(code);
      errorToast.textContent = `Copied ${code}.`;
    } catch (_error) {
      errorToast.textContent = `Copy failed. Error code: ${code}`;
    }
  };

  window.clearTimeout(showError.timer);
  showError.timer = window.setTimeout(() => {
    errorToast.hidden = true;
  }, 10000);
}

showError.timer = 0;

function buildAttachmentSummary(attachments) {
  if (attachments.length === 0) {
    return "No files added.";
  }

  const imageCount = attachments.filter((item) => item.kind === "image").length;
  const audioCount = attachments.length - imageCount;
  return `${attachments.length} file${attachments.length === 1 ? "" : "s"} ready | ${imageCount} image | ${audioCount} audio`;
}

function renderAttachmentPreview(attachment, onPreview) {
  const button = document.createElement("button");
  button.type = "button";
  button.className = "attachment-preview-trigger";
  button.setAttribute("aria-label", `Open ${attachment.name}`);
  button.addEventListener("click", () => onPreview(attachment));

  if (attachment.kind === "image") {
    const image = document.createElement("img");
    image.src = attachment.previewUrl;
    image.alt = attachment.name;
    image.className = "attachment-thumb";
    button.appendChild(image);
    return button;
  }

  button.innerHTML = `
    <svg viewBox="0 0 24 24" aria-hidden="true">
      <path d="M12 18V6"></path>
      <path d="M8 15a4 4 0 1 0 0-6"></path>
      <path d="M16 15a4 4 0 1 0 0-6"></path>
    </svg>
    <span>Open</span>
  `;
  button.classList.add("attachment-audio-tile");
  return button;
}

function renderAttachmentMeta(attachment) {
  const meta = document.createElement("div");
  meta.className = "attachment-meta";
  meta.innerHTML = `
    <strong>${escapeHtml(attachment.name)}</strong>
    <span>${escapeHtml(attachment.kind)} | ${escapeHtml(attachment.sourceType)} | ${escapeHtml(attachment.sizeLabel)}</span>
  `;
  return meta;
}

function renderRemoveButton(attachmentId, onRemove) {
  const button = document.createElement("button");
  button.type = "button";
  button.className = "attachment-remove";
  button.textContent = "Remove";
  button.addEventListener("click", () => onRemove(attachmentId));
  return button;
}

function describeRequest(payload) {
  const userContent = payload.messages.at(-1)?.content ?? [];
  const textPart = userContent.find((part) => part.type === "text");
  const attachmentCount = userContent.filter((part) => part.type !== "text").length;
  const audioOutput = payload.audio ? `Audio output: ${payload.audio.voice}` : "Audio output: off";
  return `${textPart?.text || "Attachment-only request."}\n\nAttachments: ${attachmentCount}\n${audioOutput}`;
}

function extractAssistantText(message) {
  if (typeof message.content === "string") {
    return message.content;
  }

  if (!Array.isArray(message.content)) {
    return "";
  }

  return message.content
    .map((part) => part.text || part.output_text || "")
    .filter(Boolean)
    .join("\n\n");
}

function extractAssistantImages(message) {
  if (!Array.isArray(message.content)) {
    return [];
  }

  return message.content
    .map((part) => part?.image_url?.proxy_url || part?.image_url?.url)
    .filter(Boolean);
}

function extractAssistantAudioTranscript(message) {
  return typeof message?.audio?.transcript === "string" ? message.audio.transcript.trim() : "";
}

function sameText(left, right) {
  return normalizeText(left) === normalizeText(right);
}

function normalizeText(value) {
  return typeof value === "string" ? value.trim().replaceAll(/\s+/g, " ") : "";
}

function renderInfoCard(title, body) {
  const card = document.createElement("article");
  card.className = "response-block";
  card.innerHTML = `<strong>${escapeHtml(title)}</strong><p>${escapeHtml(body)}</p>`;
  return card;
}

function renderRichTextCard(title, body) {
  const card = document.createElement("article");
  card.className = "response-block";
  card.innerHTML = `<strong>${escapeHtml(title)}</strong>`;

  const bodyElement = document.createElement("div");
  bodyElement.className = "rich-response";
  renderRichText(bodyElement, body);
  card.appendChild(bodyElement);
  return card;
}