import { api } from "./api/client.js";
import { renderAppShell } from "./components/shell.js";
import { renderLoginPage } from "./pages/login.js";
import "./styles/main.css";

const state = {
  user: null,
  error: "",
  tables: [],
  activeTable: "",
  activeTab: "data",
  page: "overview",
  rows: { rows: [], total: 0 },
  tableDetails: { columns: [], foreignKeys: [] },
  users: [],
  roles: [],
  auditLogs: [],
  postgresLogs: [],
  sqlDraft: "",
  sqlResult: null,
  search: ""
};

const app = document.querySelector("#app");

bootstrap();

async function bootstrap() {
  try {
    const { user } = await api.me();
    state.user = user;

    if (user) {
      await hydrateDashboard();
    }
  } catch {
    state.user = null;
  }

  render();
}

async function hydrateDashboard() {
  const [tablesPayload, usersPayload, rolesPayload, auditPayload, logsPayload] = await Promise.all([
    api.tables(),
    api.users(),
    api.roles(),
    api.audit(),
    api.postgresLogs()
  ]);

  state.tables = tablesPayload.tables;
  state.users = usersPayload.users;
  state.roles = rolesPayload.roles;
  state.auditLogs = auditPayload.logs;
  state.postgresLogs = logsPayload.logs;

  if (!state.activeTable && state.tables[0]) {
    state.activeTable = state.tables[0].table_name;
  }

  if (state.activeTable) {
    await Promise.all([loadRows(), loadTableDetails()]);
  }
}

async function loadRows() {
  if (!state.activeTable) {
    return;
  }

  state.rows = await api.rows(state.activeTable, {
    page: 1,
    pageSize: 25,
    search: state.search
  });
}

async function loadTableDetails() {
  if (!state.activeTable) {
    return;
  }

  state.tableDetails = await api.tableDetails(state.activeTable);
}

function render() {
  app.innerHTML = state.user ? renderAppShell(state) : renderLoginPage(state);
  bindEvents();
}

function bindEvents() {
  const loginForm = document.querySelector("#loginForm");
  if (loginForm) {
    loginForm.addEventListener("submit", handleLogin);
  }

  const logoutButton = document.querySelector("#logoutButton");
  if (logoutButton) {
    logoutButton.addEventListener("click", handleLogout);
  }

  document.querySelectorAll("[data-page]").forEach((element) => {
    element.addEventListener("click", async (event) => {
      state.page = event.currentTarget.dataset.page;
      render();
    });
  });

  document.querySelectorAll("[data-tab]").forEach((element) => {
    element.addEventListener("click", async (event) => {
      state.activeTab = event.currentTarget.dataset.tab;
      render();
    });
  });

  document.querySelectorAll("[data-table]").forEach((element) => {
    element.addEventListener("click", async (event) => {
      state.activeTable = event.currentTarget.dataset.table;
      state.page = "overview";
      state.sqlDraft = `select * from ${state.activeTable} limit 20;`;
      await Promise.all([loadRows(), loadTableDetails()]);
      render();
    });
  });

  document.querySelectorAll("[data-action]").forEach((element) => {
    element.addEventListener("click", handleAction);
  });
}

async function handleLogin(event) {
  event.preventDefault();
  const formData = new FormData(event.currentTarget);
  state.error = "";

  try {
    const payload = await api.login({
      username: formData.get("username"),
      password: formData.get("password")
    });
    state.user = payload.user;
    await hydrateDashboard();
  } catch (error) {
    state.error = error.message;
  }

  render();
}

async function handleLogout() {
  await api.logout();
  state.user = null;
  state.error = "";
  render();
}

async function handleAction(event) {
  const action = event.currentTarget.dataset.action;

  if (action === "refresh") {
    await hydrateDashboard();
  }

  if (action === "search") {
    state.search = document.querySelector("#tableSearchInput")?.value || "";
    await loadRows();
  }

  if (action === "run-sql") {
    state.sqlDraft = document.querySelector("#sqlEditor")?.value || "";
    state.sqlResult = await api.executeSql(state.sqlDraft);
  }

  render();
}