"use strict";

const $ = (sel) => document.querySelector(sel);

function pad(n) {
  return String(n).padStart(2, "0");
}

function setStatus(ok) {
  const el = $("#status");
  if (!el) return;
  el.classList.toggle("ok", ok === true);
  el.classList.toggle("err", ok === false);
}

// --- Välistemperatuur (Suuremõisa) ---
async function loadLatest() {
  setStatus(null);
  try {
    const res = await fetch("/api/latest");
    if (!res.ok) throw new Error(await res.text());
    const data = await res.json();
    renderCards(data);
    setStatus(true);
  } catch (e) {
    console.error(e);
    setStatus(false);
  }
}

function renderCards(data) {
  const host = $("#cards");
  if (!host) return;
  const out = data.outside || {};
  const temp = out.temperature == null ? "–" : out.temperature;
  const updated = out.hour ? `<div class="card-sub">Uuendatud ${out.hour}</div>` : "";
  host.innerHTML = `<div class="card out">
      <div class="k">🌤️ Välistemperatuur</div>
      <div class="v">${temp}<small> °C</small></div>
      <div class="card-sub">Suuremõisa</div>
      ${updated}
    </div>`;
}

// --- Teema ---
function setTheme(theme) {
  document.documentElement.setAttribute("data-theme", theme);
  localStorage.setItem("minukodu-theme", theme);
  const toggle = $("#theme-toggle");
  if (toggle) toggle.textContent = theme === "dark" ? "☀️" : "🌙";
  const meta = $("#meta-theme");
  if (meta) meta.setAttribute("content", theme === "dark" ? "#0e1116" : "#1f6feb");
}

// --- Vahelehed (tabid): Andurid | Transport ---
const transport = { active: false, days: 1 };

function switchView(view) {
  const isTransport = view === "transport";
  document.querySelectorAll("#tabs .tab").forEach((b) => {
    b.classList.toggle("active", b.dataset.view === view);
  });
  const vAnd = document.getElementById("view-andurid");
  const vTr = document.getElementById("view-transport");
  if (vAnd) vAnd.hidden = isTransport;
  if (vTr) vTr.hidden = !isTransport;
  transport.active = isTransport;
  if (location.hash !== "#" + view) history.replaceState(null, "", "#" + view);
  if (isTransport) loadTransport();
}

function initTabs() {
  document.querySelectorAll("#tabs .tab").forEach((btn) => {
    btn.addEventListener("click", () => switchView(btn.dataset.view));
  });
  const days = document.getElementById("praam-days");
  if (days) {
    days.querySelectorAll("button").forEach((b) => {
      b.addEventListener("click", () => {
        days.querySelectorAll("button").forEach((x) => x.classList.remove("active"));
        b.classList.add("active");
        transport.days = Number(b.dataset.days) || 1;
        loadPraam();
      });
    });
  }
  setInterval(() => {
    if (transport.active) loadTransport();
  }, 60000);
  switchView(location.hash === "#transport" ? "transport" : "andurid");
}

function loadTransport() {
  loadBus();
  loadPraam();
}

function fmtDayLabel(iso, today) {
  if (!iso || iso === today) return "";
  const d = new Date(iso + "T00:00:00");
  const t = new Date((today || iso) + "T00:00:00");
  const diff = Math.round((d - t) / 864e5);
  if (diff === 1) return "homme";
  return d.toLocaleDateString("et-EE", { weekday: "short", day: "numeric", month: "short" });
}

function setTransportUpdated(updated) {
  const el = document.getElementById("transport-updated");
  if (el && updated) el.textContent = `Uuendatud ${updated}`;
}

async function loadBus() {
  const hint = document.getElementById("bus-hint");
  try {
    const res = await fetch("/api/buss?limit=12");
    if (!res.ok) throw new Error("HTTP " + res.status);
    renderBus(await res.json());
  } catch (e) {
    console.error(e);
    if (hint) { hint.hidden = false; hint.textContent = "Bussiaegade laadimine ebaõnnestus."; }
  }
}

function renderBus(data) {
  const list = document.getElementById("bus-list");
  const hint = document.getElementById("bus-hint");
  if (!list) return;
  const rows = data.departures || [];
  if (!rows.length) {
    list.innerHTML = "";
    if (hint) { hint.hidden = false; hint.textContent = "Täna enam busse ei välju."; }
    return;
  }
  if (hint) hint.hidden = true;
  list.innerHTML = rows.map((d) => {
    const day = fmtDayLabel(d.date, data.today);
    const dayBadge = day ? `<span class="badge muted">${day}</span>` : "";
    let rt = "";
    if (d.realtime && d.delay_min != null && d.delay_min !== 0) {
      rt = d.delay_min > 0
        ? `<span class="badge warn">+${d.delay_min} min</span>`
        : `<span class="badge ok">${d.delay_min} min</span>`;
    }
    return `<div class="dep">
      <span class="dep-time">${d.time}</span>
      <span class="dep-route">${d.route || ""}</span>
      <span class="dep-dest">→ ${d.headsign || "?"}</span>
      ${rt}${dayBadge}
    </div>`;
  }).join("");
}

async function loadPraam() {
  const hint = document.getElementById("praam-hint");
  try {
    const res = await fetch(`/api/praam?days=${transport.days}`);
    if (!res.ok) throw new Error("HTTP " + res.status);
    renderPraam(await res.json());
  } catch (e) {
    console.error(e);
    if (hint) { hint.hidden = false; hint.textContent = "Praamiaegade laadimine ebaõnnestus."; }
  }
}

function renderPraam(data) {
  const list = document.getElementById("praam-list");
  const hint = document.getElementById("praam-hint");
  const warn = document.getElementById("praam-warning");
  const rows = data.departures || [];

  if (warn) {
    if (Array.isArray(data.warnings) && data.warnings.length) {
      warn.hidden = false;
      warn.innerHTML = "⚠️ <b>Ilmahoiatuse kontekst (Väinameri)</b>" +
        data.warnings.map((w) => `<div>• ${w.area}: ${w.valid || w.text}</div>`).join("") +
        `<div class="warn-sub">Praamiliiklus võib häiruda — kontrolli ` +
        `<a href="https://praamid.ee" target="_blank" rel="noopener">praamid.ee</a>.</div>`;
    } else {
      warn.hidden = true;
    }
  }

  if (!rows.length) {
    list.innerHTML = "";
    if (hint) { hint.hidden = false; hint.textContent = "Väljumisi ei leitud."; }
    return;
  }
  if (hint) hint.hidden = true;
  setTransportUpdated(data.updated);

  const groups = {};
  for (const d of rows) (groups[d.direction] = groups[d.direction] || []).push(d);
  list.innerHTML = ["HR", "RH"].filter((k) => groups[k]).map((k) => {
    const items = groups[k].map((d) => {
      const day = fmtDayLabel(d.date, data.today);
      const dayBadge = day ? `<span class="badge muted">${day}</span>` : "";
      const st = d.disrupted
        ? `<span class="badge err">${d.status_et}</span>`
        : `<span class="badge ok">${d.status_et}</span>`;
      return `<div class="dep">
        <span class="dep-time">${d.time}</span>
        <span class="dep-ship">${d.ship || ""}</span>
        <span class="dep-dest"></span>
        ${st}${dayBadge}
      </div>`;
    }).join("");
    return `<div class="dep-group"><div class="dep-group-title">${groups[k][0].direction_name}</div>${items}</div>`;
  }).join("");
}

function init() {
  const saved = localStorage.getItem("minukodu-theme");
  const prefersDark = window.matchMedia && window.matchMedia("(prefers-color-scheme: dark)").matches;
  setTheme(saved || (prefersDark ? "dark" : "light"));
  const toggle = $("#theme-toggle");
  if (toggle) {
    toggle.addEventListener("click", () => {
      setTheme(document.documentElement.getAttribute("data-theme") === "dark" ? "light" : "dark");
    });
  }

  initTabs();
  loadLatest();
  setInterval(loadLatest, 60000);
}

document.addEventListener("DOMContentLoaded", init);