const apiKeyInput = document.getElementById("apiKey");
const modelInput = document.getElementById("model");
const systemPromptInput = document.getElementById("systemPrompt");
const resumeInput = document.getElementById("resume");
const saveBtn = document.getElementById("saveBtn");
const addTaskBtn = document.getElementById("addTaskBtn");
const tasksContainer = document.getElementById("tasks");
const statusEl = document.getElementById("status");
const toggleKeyBtn = document.getElementById("toggleKey");
const themeSelect = document.getElementById("themeSelect");

function getStorage(keys) {
  return new Promise((resolve) => chrome.storage.local.get(keys, resolve));
}

function setStatus(message) {
  statusEl.textContent = message;
  if (!message) return;
  setTimeout(() => {
    if (statusEl.textContent === message) statusEl.textContent = "";
  }, 2000);
}

function applyTheme(theme) {
  const value = theme || "system";
  document.documentElement.dataset.theme = value;
}

function newTaskId() {
  if (crypto?.randomUUID) return crypto.randomUUID();
  return `task-${Date.now()}-${Math.random().toString(16).slice(2, 8)}`;
}

function buildTaskCard(task) {
  const card = document.createElement("div");
  card.className = "task-card";
  card.dataset.id = task.id || newTaskId();

  const nameField = document.createElement("div");
  nameField.className = "field";
  const nameLabel = document.createElement("label");
  nameLabel.textContent = "Name";
  const nameInput = document.createElement("input");
  nameInput.type = "text";
  nameInput.value = task.name || "";
  nameInput.className = "task-name";
  nameField.appendChild(nameLabel);
  nameField.appendChild(nameInput);

  const textField = document.createElement("div");
  textField.className = "field";
  const textLabel = document.createElement("label");
  textLabel.textContent = "Task prompt";
  const textArea = document.createElement("textarea");
  textArea.rows = 6;
  textArea.value = task.text || "";
  textArea.className = "task-text";
  textField.appendChild(textLabel);
  textField.appendChild(textArea);

  const actions = document.createElement("div");
  actions.className = "task-actions";
  const duplicateBtn = document.createElement("button");
  duplicateBtn.type = "button";
  duplicateBtn.className = "ghost";
  duplicateBtn.textContent = "Duplicate";
  const deleteBtn = document.createElement("button");
  deleteBtn.type = "button";
  deleteBtn.className = "ghost";
  deleteBtn.textContent = "Delete";

  duplicateBtn.addEventListener("click", () => {
    const copy = {
      id: newTaskId(),
      name: `${nameInput.value || "Untitled"} Copy`,
      text: textArea.value
    };
    const newCard = buildTaskCard(copy);
    card.insertAdjacentElement("afterend", newCard);
  });

  deleteBtn.addEventListener("click", () => {
    card.remove();
  });

  actions.appendChild(duplicateBtn);
  actions.appendChild(deleteBtn);

  card.appendChild(nameField);
  card.appendChild(textField);
  card.appendChild(actions);

  return card;
}

function collectTasks() {
  const cards = [...tasksContainer.querySelectorAll(".task-card")];
  return cards.map((card) => {
    const nameInput = card.querySelector(".task-name");
    const textArea = card.querySelector(".task-text");
    return {
      id: card.dataset.id || newTaskId(),
      name: (nameInput?.value || "Untitled Task").trim(),
      text: (textArea?.value || "").trim()
    };
  });
}

async function loadSettings() {
  const {
    apiKey = "",
    model = "",
    systemPrompt = "",
    resume = "",
    tasks = [],
    theme = "system"
  } = await getStorage(["apiKey", "model", "systemPrompt", "resume", "tasks", "theme"]);

  apiKeyInput.value = apiKey;
  modelInput.value = model;
  systemPromptInput.value = systemPrompt;
  resumeInput.value = resume;
  themeSelect.value = theme;
  applyTheme(theme);

  tasksContainer.innerHTML = "";
  if (!tasks.length) {
    tasksContainer.appendChild(
      buildTaskCard({ id: newTaskId(), name: "", text: "" })
    );
    return;
  }

  for (const task of tasks) {
    tasksContainer.appendChild(buildTaskCard(task));
  }
}

async function saveSettings() {
  const tasks = collectTasks();
  await chrome.storage.local.set({
    apiKey: apiKeyInput.value.trim(),
    model: modelInput.value.trim(),
    systemPrompt: systemPromptInput.value,
    resume: resumeInput.value,
    tasks,
    theme: themeSelect.value
  });
  setStatus("Saved.");
}

saveBtn.addEventListener("click", () => void saveSettings());
addTaskBtn.addEventListener("click", () => {
  tasksContainer.appendChild(buildTaskCard({ id: newTaskId(), name: "", text: "" }));
});

toggleKeyBtn.addEventListener("click", () => {
  const isPassword = apiKeyInput.type === "password";
  apiKeyInput.type = isPassword ? "text" : "password";
  toggleKeyBtn.textContent = isPassword ? "Hide" : "Show";
});

themeSelect.addEventListener("change", () => applyTheme(themeSelect.value));

loadSettings();