import {
  ArrowDownToLine,
  Check,
  Grid3X3,
  LockKeyhole,
  MapPinned,
  Move3d,
  Rotate3d,
  Scaling,
  Trash2,
} from 'lucide-react';
import {
  Button,
  IconButton,
  Select,
  ToolbarToggleGroup,
  type ToolbarItem,
} from '../../components/ui';
import {
  MAP_OBJECT_PLACEMENT_LABELS,
  type MapEditorTransformMode,
  type MapObjectPlacementMode,
} from '../../map/editor/types';

const TRANSFORM_TOOLS: ToolbarItem<MapEditorTransformMode>[] = [
  { value: 'translate', label: '移动工具 W', icon: Move3d },
  { value: 'rotate', label: '旋转工具 E', icon: Rotate3d },
  { value: 'scale', label: '缩放工具 R', icon: Scaling },
];

export function MapViewportToolbar({
  visible,
  interactionActive,
  mode,
  snapping,
  placementMode,
  hasSelectedObject,
  allowScale,
  loading,
  onActivate,
  onModeChange,
  onSnappingChange,
  onPlacementModeChange,
  onAlignToSurface,
}: {
  visible: boolean;
  interactionActive: boolean;
  mode: MapEditorTransformMode;
  snapping: boolean;
  placementMode: MapObjectPlacementMode;
  hasSelectedObject: boolean;
  allowScale: boolean;
  loading: boolean;
  onActivate: () => void;
  onModeChange: (mode: MapEditorTransformMode) => void;
  onSnappingChange: (value: boolean) => void;
  onPlacementModeChange: (mode: MapObjectPlacementMode) => void;
  onAlignToSurface: () => void;
}) {
  if (!visible) return null;
  return (
    <div
      aria-label="地图视口工具"
      className="flex max-w-full flex-wrap items-center justify-center gap-1 p-1"
    >
      <button
        type="button"
        aria-label="激活地图编辑"
        aria-pressed={interactionActive}
        disabled={loading}
        onClick={onActivate}
        className={`flex h-8 items-center gap-1.5 rounded-lg px-2 text-xs font-semibold transition-colors ${interactionActive ? 'bg-accent-soft text-accent' : 'bg-surface/80 text-text-secondary hover:bg-element-hover'}`}
      >
        <MapPinned className="h-3.5 w-3.5" aria-hidden="true" />
        地图编辑
      </button>
      <ToolbarToggleGroup
        items={TRANSFORM_TOOLS.filter((item) => allowScale || item.value !== 'scale')}
        value={mode}
        onChange={onModeChange}
        label="地图变换模式"
      />
      <IconButton
        active={snapping}
        tooltip={snapping ? '关闭网格吸附（当前 0.1 m / 5°）' : '开启网格吸附'}
        aria-label="网格吸附"
        aria-pressed={snapping}
        disabled={loading}
        onClick={() => onSnappingChange(!snapping)}
      >
        <Grid3X3 className="h-3.5 w-3.5" />
      </IconButton>
      <span aria-hidden="true" className="mx-0.5 h-5 w-px bg-border" />
      <label className="flex items-center gap-1 text-xs text-text-tertiary">
        <span>贴地</span>
        <Select
          aria-label="贴地检测模式"
          className="w-[112px]"
          value={placementMode}
          disabled={loading}
          onChange={(event) => onPlacementModeChange(event.target.value as MapObjectPlacementMode)}
        >
          {(Object.keys(MAP_OBJECT_PLACEMENT_LABELS) as MapObjectPlacementMode[]).map((value) => (
            <option key={value} value={value}>
              {value === 'auto_ground' ? '地面 z=0' : value === 'gravity' ? '表面检测' : '锁定位姿'}
            </option>
          ))}
        </Select>
      </label>
      <IconButton
        tooltip={hasSelectedObject ? '重新检测并贴合承载面' : '选中地图物体后可贴合表面'}
        aria-label="立即贴合承载面"
        disabled={loading || !hasSelectedObject || placementMode === 'locked'}
        onClick={onAlignToSurface}
      >
        {placementMode === 'locked' ? (
          <LockKeyhole className="h-3.5 w-3.5" />
        ) : (
          <ArrowDownToLine className="h-3.5 w-3.5" />
        )}
      </IconButton>
    </div>
  );
}

export function MapDraftStatusOverlay({
  visible,
  changeCount,
  loading,
  onCommit,
  onDiscard,
  error,
}: {
  visible: boolean;
  changeCount: number;
  loading: boolean;
  error?: string;
  onCommit: () => void;
  onDiscard: () => void;
}) {
  const dirty = changeCount > 0;
  if (!visible || (!dirty && !loading && !error)) return null;
  return (
    <div
      aria-label="地图草稿状态"
      role="status"
      className="engineering-glass flex max-w-full flex-wrap items-center justify-center gap-2 rounded-xl border px-2 py-1.5"
    >
      <span
        aria-hidden="true"
        className={`h-2 w-2 shrink-0 rounded-full ${dirty ? 'draft-dirty-dot bg-warning' : 'bg-success'}`}
      />
      <span className="min-w-0 text-xs font-medium text-text-secondary">
        {loading
          ? '正在应用草稿…'
          : error
            ? `应用失败 · ${changeCount} 项未保存改动`
            : `${changeCount} 项未保存改动`}
        {error && <span className="block text-danger">{error}</span>}
      </span>
      <Button
        variant="ghost"
        aria-label="丢弃地图草稿"
        disabled={loading || !dirty}
        icon={<Trash2 className="h-3 w-3" />}
        onClick={onDiscard}
      >
        放弃
      </Button>
      <Button
        variant="primary"
        aria-label="提交地图草稿"
        disabled={loading || !dirty}
        icon={<Check className="h-3 w-3" />}
        onClick={onCommit}
      >
        应用
      </Button>
    </div>
  );
}

export interface MapAssetDropTarget {
  left: number;
  top: number;
  position: readonly [number, number, number] | null;
}

export function MapAssetDropIndicator({ target }: { target?: MapAssetDropTarget }) {
  if (!target) return null;
  const valid = Boolean(target.position);
  return (
    <div className="pointer-events-none absolute inset-0 z-30" aria-label="地图资产放置预览">
      <div
        className={`absolute -translate-x-1/2 -translate-y-1/2 rounded-full border-2 p-1 shadow-2xl ${valid ? 'border-accent bg-accent/25 text-accent' : 'border-danger bg-danger/20 text-danger'}`}
        style={{ left: target.left, top: target.top }}
      >
        <span className="grid h-8 w-8 place-items-center rounded-full border border-current bg-panel/85 backdrop-blur">
          <MapPinned className="h-4 w-4" />
        </span>
        <span className="absolute left-1/2 top-full mt-2 -translate-x-1/2 whitespace-nowrap rounded-lg border border-border-strong bg-panel/90 px-2 py-1 text-xs font-medium shadow-xl backdrop-blur">
          {valid
            ? `释放放置 · ${target.position![0].toFixed(1)}, ${target.position![1].toFixed(1)}`
            : '请拖到 3D 地面'}
        </span>
      </div>
    </div>
  );
}