// public/js/activityModal.js

let activityMap = null;

function closeActivityModal() {
  const modal = document.getElementById("activityModal");
  const container = document.getElementById("activityModalContent");

  if (activityMap) {
    activityMap.remove();
    activityMap = null;
  }

  if (container) {
    container.innerHTML = "";
  }

  if (modal) {
    modal.classList.remove("open");
    modal.setAttribute("aria-hidden", "true");
  }

  window.currentActivity = null;

  if (typeof window.closeInfoPanel === "function") {
    window.closeInfoPanel();
  }

  document.body.style.overflow = "";
}

window.openActivityModal = async function(item, list = [], index = 0) {
  window.closeBottomSheet?.();

  const modal = document.getElementById("activityModal");
  const container = document.getElementById("activityModalContent");

  if (!modal || !container) {
    console.error("[activity modal] Mancano activityModal o activityModalContent");
    return;
  }

  if (!item) return;

  let points = [];

  try {
    if (typeof window.getActivityRoutePoints === "function") {
      points = await window.getActivityRoutePoints(item);
    } else if (typeof getActivityRoutePoints === "function") {
      points = await getActivityRoutePoints(item);
    }
  } catch (error) {
    console.error("[activity modal] Errore traccia:", error);
  }

  if (activityMap) {
    activityMap.remove();
    activityMap = null;
  }

  window.currentActivity = item;
  window.activityModalList = Array.isArray(list) ? list : [];
  window.activityModalIndex = Number.isInteger(index) ? index : 0;

  const title =
    item.display_name ||
    item.route_name ||
    item.title ||
    item.file_name ||
    item.name ||
    "Attività";

  const distance = Number(item.distance_meters);
  const duration = Number(item.duration_millis);
  const elevation = Number(item.elevation_gain_meters);

  container.innerHTML = `
    <div class="activity-modal-wrapper">
      <div id="activityMap"></div>

      <button
        id="activityInfoBtn"
        class="modal-info-btn activity-info-btn"
        type="button"
        aria-label="Informazioni attività"
      >
        ℹ️
      </button>

      <div class="activity-modal-info">
        <div class="activity-modal-title">
          ${escapeActivityHtml(title)}
        </div>

        ${
          item.sport
            ? `<div class="activity-modal-meta">
                 ${escapeActivityHtml(item.sport)}
               </div>`
            : ""
        }

        <div class="activity-modal-meta">
          ${
            Number.isFinite(distance)
              ? `${(distance / 1000).toFixed(1)} km`
              : "Distanza non disponibile"
          }
          ·
          ${formatActivityModalDuration(duration)}
        </div>

        ${
          Number.isFinite(elevation) && elevation > 0
            ? `<div class="activity-modal-meta">
                 ⛰ ${Math.round(elevation)} m D+
               </div>`
            : ""
        }
      </div>
    </div>
  `;

  modal.classList.add("open");
  modal.setAttribute("aria-hidden", "false");
  document.body.style.overflow = "hidden";

  const activityInfoBtn = document.getElementById("activityInfoBtn");

  if (activityInfoBtn) {
    activityInfoBtn.onclick = event => {
      event.preventDefault();
      event.stopPropagation();
      event.stopImmediatePropagation();

      window.currentActivity = item;

      if (typeof window.toggleInfoPanel === "function") {
        window.toggleInfoPanel(item);
      } else if (typeof window.openInfoPanel === "function") {
        window.openInfoPanel(item);
      } else {
        console.error("[activity info] Nessuna funzione info panel disponibile");
      }
    };
  }

  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      const mapElement = document.getElementById("activityMap");

      if (!mapElement || typeof L === "undefined") {
        console.error("[activity modal] Leaflet o contenitore non disponibile");
        return;
      }

      activityMap = L.map(mapElement, {
        zoomControl: true,
        attributionControl: true
      });

      L.tileLayer(
        "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",
        {
          subdomains: "abc",
          maxZoom: 19,
          attribution: "&copy; OpenStreetMap"
        }
      ).addTo(activityMap);

      const latlngs = Array.isArray(points)
        ? points
            .map(point => [
              Number(point?.lat),
              Number(point?.lng)
            ])
            .filter(
              point =>
                Number.isFinite(point[0]) &&
                Number.isFinite(point[1])
            )
        : [];

      if (latlngs.length >= 2) {
        const route = L.polyline(latlngs, {
          color: "#2b8cff",
          weight: 5,
          opacity: 1,
          lineCap: "round",
          lineJoin: "round"
        }).addTo(activityMap);

        L.circleMarker(latlngs[0], {
          radius: 6,
          color: "#087f23",
          fillColor: "#18b83f",
          fillOpacity: 1
        })
          .bindTooltip("Partenza")
          .addTo(activityMap);

        L.circleMarker(latlngs[latlngs.length - 1], {
          radius: 6,
          color: "#b00020",
          fillColor: "#e32636",
          fillOpacity: 1
        })
          .bindTooltip("Arrivo")
          .addTo(activityMap);

        activityMap.fitBounds(route.getBounds(), {
          paddingTopLeft: [30, 70],
          paddingBottomRight: [30, 120],
          maxZoom: 16
        });
      } else {
        const latitude = Number(item.center_latitude);
        const longitude = Number(item.center_longitude);

        const hasCenter =
          Number.isFinite(latitude) &&
          Number.isFinite(longitude);

        activityMap.setView(
          hasCenter ? [latitude, longitude] : [42.5, 12.5],
          hasCenter ? 12 : 6
        );
      }

      activityMap.invalidateSize(true);

      setTimeout(() => {
        activityMap?.invalidateSize(true);
      }, 150);

      setTimeout(() => {
        activityMap?.invalidateSize(true);
      }, 400);
    });
  });
};

function formatActivityModalDuration(milliseconds) {
  if (!Number.isFinite(milliseconds)) {
    return "Durata non disponibile";
  }

  const totalSeconds = Math.round(milliseconds / 1000);
  const hours = Math.floor(totalSeconds / 3600);
  const minutes = Math.floor((totalSeconds % 3600) / 60);

  return hours > 0
    ? `${hours}h ${minutes}m`
    : `${minutes}m`;
}

function escapeActivityHtml(value) {
  return String(value ?? "")
    .replaceAll("&", "&amp;")
    .replaceAll("<", "&lt;")
    .replaceAll(">", "&gt;")
    .replaceAll('"', "&quot;")
    .replaceAll("'", "&#039;");
}

window.closeActivityModal = closeActivityModal;

document.addEventListener("DOMContentLoaded", () => {
  const modal = document.getElementById("activityModal");
  const closeButton = document.getElementById("activityModalClose");

  closeButton?.addEventListener("click", event => {
    event.stopPropagation();
    closeActivityModal();
  });

  modal?.addEventListener("click", event => {
    if (event.target === modal) {
      closeActivityModal();
    }
  });

  document.addEventListener("keydown", event => {
    if (
      event.key === "Escape" &&
      modal?.classList.contains("open")
    ) {
      closeActivityModal();
    }
  });
});