/**
 * Editor actions that several places trigger the same way (inspector, hierarchy context
 * menu, keyboard): they run the command and put the selection where the user expects it.
 */
import { annotationNoun, RemoveAnnotationCommand } from '../core/commands/annotationCommands';
import { DeleteAssetCommand } from '../core/commands/assetCommands';
import { AddColliderCommand } from '../core/commands/colliderCommands';
import { oneStep } from '../core/commands/CompoundCommand';
import { CreateContainerCommand } from '../core/commands/containerCommands';
import { RemoveNodeCommand } from '../core/commands/graphCommands';
import { RemoveSceneObjectsCommand } from '../core/commands/sceneObjectCommands';
import type { AssetType } from '../core/model/AssetTypes';
import { isLiveInstance, isTemplateContent } from '../core/model/instance';
import type { Command } from '../core/commands/Command';
import { findAnnotation } from '../core/graph';
import { findAsset, findGraphAsset, type ObjectHolder, type Project } from '../core/model/Project';
import type { SceneObject } from '../core/model/SceneObject';
import { textureRefIds } from '../core/model/texture';
import { animationsUsing, findPropertyUsages, findUsages } from '../core/model/usages';
import { Dialog } from '../ui';
import { type EditorState, objectSelection } from './state';

/** Groups the objects into a new container asset placed in their stead; selects the container. */
export function createContainer(state: EditorState, holderId: string, objectIds: readonly string[]): boolean {
  const command = new CreateContainerCommand(holderId, objectIds);
  if (!state.execute(command)) return false;
  state.select(objectSelection(holderId, [command.objectId]));
  return true;
}

/** The test `AddColliderCommand` makes, so no place offers what it would refuse. */
export function canAddCollider(project: Project, holder: ObjectHolder, object: SceneObject): boolean {
  const type = findAsset(project, object.assetId)?.type;
  return (
    type !== undefined &&
    type !== 'collider' &&
    !isTemplateContent(holder, object.id) &&
    !isLiveInstance(project, holder, object)
  );
}

/** Gives the object a collider child sized like it; selects the collider. */
export function addCollider(state: EditorState, holderId: string, objectId: string): boolean {
  const command = new AddColliderCommand(holderId, objectId);
  if (!state.execute(command)) return false;
  state.select(objectSelection(holderId, [command.objectId]));
  return true;
}

/** Removes the objects (with their subtrees) as one undo step. */
export function removeObjects(state: EditorState, holderId: string, objectIds: readonly string[]): boolean {
  return state.execute(new RemoveSceneObjectsCommand(holderId, objectIds));
}

/** Deletes graph nodes as one undo step, however many were selected. */
export function removeNodes(state: EditorState, assetId: string, nodeIds: readonly string[]): boolean {
  const commands = nodeIds.map((id) => new RemoveNodeCommand(assetId, id));
  return commands.length > 0 && state.execute(oneStep(`Delete ${commands.length} nodes`, commands));
}

/**
 * Deletes everything a graph selection holds – nodes and boxes alike – as one undo step, since one
 * band caught them and one keypress asked for them to go. Boxes still take none of their nodes.
 */
export function removeGraphSelection(
  state: EditorState,
  assetId: string,
  nodeIds: readonly string[],
  annotationIds: readonly string[],
): boolean {
  const graph = findGraphAsset(state.project, assetId)?.graph;
  const commands: Command[] = nodeIds.map((id) => new RemoveNodeCommand(assetId, id));
  let noun = '';
  for (const id of annotationIds) {
    const found = graph && findAnnotation(graph, id);
    if (!found) continue;
    noun = annotationNoun(found.kind);
    commands.push(new RemoveAnnotationCommand(assetId, found.kind, id));
  }
  if (commands.length === 0) return false;
  const label =
    commands.length === 1 && noun !== ''
      ? `Delete ${noun}`
      : nodeIds.length === commands.length
        ? `Delete ${commands.length} nodes`
        : `Delete ${commands.length} items`;
  return state.execute(oneStep(label, commands));
}

/** Asks before deleting an asset, spelling out what goes with it. */
export function confirmDeleteAsset(state: EditorState, assetId: string): void {
  const asset = findAsset(state.project, assetId);
  if (!asset) return;
  const usages = findUsages(state.project, assetId).length;
  // A texture is never placed but worn through a property, so counting placed instances would
  // report "unused". Its frames count as the texture itself.
  const ids = asset.type === 'texture' ? textureRefIds(asset) : [assetId];
  const references = findPropertyUsages(state.project, ids).length;
  const animations = asset.type === 'texture' ? animationsUsing(state.project, ids).length : 0;
  const detail =
    asset.type === 'scene'
      ? `The scene and its ${asset.objects.length} object(s) are removed.`
      : references > 0 || animations > 0
        ? wornDetail(references, animations, asset.type)
        : usages === 0
          ? 'This cannot be undone with Ctrl+Z after reload.'
          : asset.type === 'container'
            ? `${usages} placed container(s) are removed together with their content.`
            : `${usages} placed instance(s) are removed as well (scenes and container templates).`;
  new Dialog(`Delete "${asset.name}"?`, detail, [
    { label: 'Cancel' },
    { label: 'Delete', danger: true, onClick: () => state.execute(new DeleteAssetCommand(assetId)) },
  ]).openCentered();
}

function wornDetail(sprites: number, animations: number, type: AssetType): string {
  if (type === 'font') return `${sprites} text(s) reference it and fall back to the editor's own typeface.`;
  const who = [
    sprites > 0 ? `${sprites} sprite(s)` : '',
    animations > 0 ? `${animations} animation(s)` : '',
  ].filter(Boolean);
  return `${who.join(' and ')} reference it and show the plain colour in its place.`;
}