const DEFAULT_LOCATION_NAME = "Default Location";

export const DEFAULT_MAP_SIZE = {
  width: 1000,
  height: 700,
};

export const MIN_MAP_ZOOM = 0.3;
export const MAX_MAP_ZOOM = 1.6;

export const DEFAULT_MAP_FILTERS = {
  showZones: true,
  showLabels: true,
  showCounts: true,
  showPins: false,
  showMyItems: true,
  showOtherItems: false,
  showCompleted: false,
  showUnmapped: false,
};

export const MAP_OBJECT_TYPES = [
  "zone",
  "aisle",
  "entrance",
  "checkout",
  "shelf",
  "wall",
  "department",
  "anchor",
  "other",
];

export function getStoreName(location) {
  return location?.name || "Store";
}

export function getLocationName(location) {
  if (!location) return "Location";
  if (!location.location_name || location.location_name === DEFAULT_LOCATION_NAME) {
    return "Default";
  }
  return location.location_name;
}

export function getMapStatus(state, options = {}) {
  if (options.hasUnsavedChanges) return "Unsaved Draft";
  if (!state?.draft_map && !state?.published_map) return "No Map";
  if (options.mode === "edit") return "Draft";
  if (options.mode === "view" && options.previewDraft && state?.draft_map) return "Viewing Draft";
  if (state?.published_map) return "Published";
  if (state?.draft_map) return "Draft";
  return "No Map";
}

export function objectZoneId(object) {
  return object?.zone_id ? String(object.zone_id) : "";
}

export function mapForMode(mapState, mode, previewDraft) {
  if (mode === "edit") {
    return mapState?.draft_map || mapState?.published_map || null;
  }

  if (previewDraft && mapState?.draft_map) {
    return mapState.draft_map;
  }

  return mapState?.published_map || mapState?.draft_map || null;
}

export function objectsForMode(mapState, mode, previewDraft) {
  if (mode === "edit") {
    return mapState?.draft_objects?.length
      ? mapState.draft_objects
      : mapState?.published_objects || [];
  }

  if (previewDraft && mapState?.draft_map) {
    return mapState.draft_objects || [];
  }

  return mapState?.published_objects?.length
    ? mapState.published_objects
    : mapState?.draft_objects || [];
}

export function createClientObject(zone, index = 0) {
  const offset = index * 24;
  return {
    client_id: `new-${Date.now()}-${index}`,
    zone_id: zone?.id || null,
    zone_name: zone?.name || null,
    type: "zone",
    label: zone?.name || "New Area",
    x: 80 + offset,
    y: 80 + offset,
    width: 220,
    height: 130,
    rotation: 0,
    locked: false,
    visible: true,
    sort_order: index + 1,
    metadata_json: {},
  };
}

export function normalizeMapObject(object, index = 0) {
  const hasExplicitLabel = Object.prototype.hasOwnProperty.call(object, "label");

  return {
    ...object,
    client_id: object.client_id || `object-${object.id || Date.now()}-${index}`,
    zone_id: object.zone_id ?? null,
    zone_name: object.zone_name || null,
    type: MAP_OBJECT_TYPES.includes(object.type) ? object.type : "zone",
    label: hasExplicitLabel
      ? String(object.label ?? "").trim()
      : object.zone_name || "Map Area",
    x: Number(object.x) || 0,
    y: Number(object.y) || 0,
    width: Math.max(40, Number(object.width) || 160),
    height: Math.max(40, Number(object.height) || 100),
    rotation: Number(object.rotation) || 0,
    locked: Boolean(object.locked),
    visible: object.visible !== false,
    sort_order: Number(object.sort_order ?? object.sortOrder ?? index + 1),
    metadata_json: object.metadata_json || {},
  };
}

export function getObjectKey(object) {
  return String(object.id || object.client_id);
}

export function getMapObjectDisplayLabel(object, fallback = "Map Area") {
  const label = String(object?.label ?? "").trim();
  const zoneName = String(object?.zone_name ?? "").trim();
  return label || zoneName || fallback;
}

export function prepareObjectsForSave(objects) {
  return objects.map((object, index) => ({
    zone_id: object.zone_id || null,
    type: object.type || "zone",
    label: String(object.label ?? "").trim(),
    x: Number(object.x) || 0,
    y: Number(object.y) || 0,
    width: Math.max(40, Number(object.width) || 160),
    height: Math.max(40, Number(object.height) || 100),
    rotation: Number(object.rotation) || 0,
    locked: Boolean(object.locked),
    visible: object.visible !== false,
    sort_order: index + 1,
    metadata_json: object.metadata_json || {},
  }));
}

export function itemMatchesMapFilters(item, filters, username) {
  if (!filters.showCompleted && item.bought) return false;

  const addedBy = Array.isArray(item.added_by_users) ? item.added_by_users : [];
  const hasOwnershipData = addedBy.length > 0 && username;
  const isMine = hasOwnershipData ? addedBy.includes(username) : true;
  if (isMine && !filters.showMyItems) return false;
  if (!isMine && !filters.showOtherItems) return false;
  return true;
}

export function itemsForZone(items, zoneId, filters, username) {
  return items.filter((item) => (
    String(item.zone_id || "") === String(zoneId || "") &&
    itemMatchesMapFilters(item, filters, username)
  ));
}

export function unmappedItems(items, filters, username) {
  return items.filter((item) => !item.zone_id && itemMatchesMapFilters(item, filters, username));
}

export function clientPointToMap(event, svgElement, mapSize) {
  const rect = svgElement.getBoundingClientRect();
  const x = ((event.clientX - rect.left) / rect.width) * mapSize.width;
  const y = ((event.clientY - rect.top) / rect.height) * mapSize.height;
  return { x, y };
}

export function clampMapZoom(value) {
  return Math.max(MIN_MAP_ZOOM, Math.min(MAX_MAP_ZOOM, value));
}

export function clampObjectToMap(object, mapSize) {
  const width = Math.max(40, Math.min(object.width, mapSize.width));
  const height = Math.max(40, Math.min(object.height, mapSize.height));
  return {
    ...object,
    width,
    height,
    x: Math.max(0, Math.min(object.x, mapSize.width - width)),
    y: Math.max(0, Math.min(object.y, mapSize.height - height)),
  };
}