import type {
  AssetMarqueeState,
  CanvasLayer,
  EditorAsset,
  EditorAssetFolder,
} from './ImageCanvasEditorTypes';

type ClientRectLike = Pick<DOMRect, 'bottom' | 'left' | 'right' | 'top'>;

type ClientPoint = {
  clientX: number;
  clientY: number;
};

type AssetFolderHitTarget = {
  folderId: string;
  rect: ClientRectLike;
};

type AssetHitTarget = {
  assetId: string;
  rect: ClientRectLike;
};

export type GroupedAssetFolder = EditorAssetFolder & {
  assets: EditorAsset[];
};

export const EDITOR_UPLOAD_ASSET_FOLDER_LABEL = '上传素材';

function isPointInRect(point: ClientPoint, rect: ClientRectLike) {
  return (
    point.clientX >= rect.left &&
    point.clientX <= rect.right &&
    point.clientY >= rect.top &&
    point.clientY <= rect.bottom
  );
}

function doRectsIntersect(rect: ClientRectLike, selectionRect: ClientRectLike) {
  return (
    rect.left <= selectionRect.right &&
    rect.right >= selectionRect.left &&
    rect.top <= selectionRect.bottom &&
    rect.bottom >= selectionRect.top
  );
}

export function resolveAssetFolderIdFromPoint({
  point,
  listRect,
  folders,
}: {
  point: ClientPoint;
  listRect: ClientRectLike | null | undefined;
  folders: AssetFolderHitTarget[];
}) {
  if (!listRect || !isPointInRect(point, listRect)) {
    return null;
  }
  const matchedFolder = folders.find((folder) =>
    isPointInRect(point, folder.rect),
  );
  return matchedFolder?.folderId ?? null;
}

export function resolvePinnedAssetMoveFolderId({
  folderId,
  listRect,
  headerRect,
}: {
  folderId: string | null;
  listRect: ClientRectLike | null | undefined;
  headerRect: ClientRectLike | null | undefined;
}) {
  if (
    !folderId ||
    !listRect ||
    !headerRect ||
    (headerRect.bottom >= listRect.top && headerRect.top <= listRect.bottom)
  ) {
    return null;
  }
  return folderId;
}

export function shouldStartAssetMarquee({
  isAssetSelectionMode,
  button,
  isBlockedTarget,
}: {
  isAssetSelectionMode: boolean;
  button: number;
  isBlockedTarget: boolean;
}) {
  return isAssetSelectionMode && button === 0 && !isBlockedTarget;
}

export function createAssetMarqueeFromPointer({
  pointerId,
  point,
  containerRect,
}: {
  pointerId: number;
  point: ClientPoint;
  containerRect: Pick<DOMRect, 'left' | 'top'> | null | undefined;
}): AssetMarqueeState {
  const startX = point.clientX - (containerRect?.left ?? 0);
  const startY = point.clientY - (containerRect?.top ?? 0);
  return {
    pointerId,
    startX,
    startY,
    currentX: startX,
    currentY: startY,
  };
}

export function moveAssetMarqueeToPointer({
  marquee,
  point,
  containerRect,
}: {
  marquee: AssetMarqueeState;
  point: ClientPoint;
  containerRect: Pick<DOMRect, 'left' | 'top'> | null | undefined;
}) {
  return {
    ...marquee,
    currentX: point.clientX - (containerRect?.left ?? 0),
    currentY: point.clientY - (containerRect?.top ?? 0),
  };
}

export function createAssetMarqueeSelectionRect({
  marquee,
  point,
  containerRect,
}: {
  marquee: AssetMarqueeState;
  point: ClientPoint;
  containerRect: Pick<DOMRect, 'left' | 'top'> | null | undefined;
}): ClientRectLike {
  const startClientX = (containerRect?.left ?? 0) + marquee.startX;
  const startClientY = (containerRect?.top ?? 0) + marquee.startY;
  return {
    left: Math.min(startClientX, point.clientX),
    right: Math.max(startClientX, point.clientX),
    top: Math.min(startClientY, point.clientY),
    bottom: Math.max(startClientY, point.clientY),
  };
}

export function selectUploadedAssetsInRect({
  assets,
  assetTargets,
  selectionRect,
}: {
  assets: EditorAsset[];
  assetTargets: AssetHitTarget[];
  selectionRect: ClientRectLike;
}) {
  const uploadedAssetIds = new Set(
    assets
      .filter((asset) => asset.sourceKind === 'uploaded')
      .map((asset) => asset.id),
  );
  return new Set(
    assetTargets
      .filter(
        (target) =>
          uploadedAssetIds.has(target.assetId) &&
          doRectsIntersect(target.rect, selectionRect),
      )
      .map((target) => target.assetId),
  );
}

export function groupAssetsByFolder(
  assetFolders: EditorAssetFolder[],
  assets: EditorAsset[],
): GroupedAssetFolder[] {
  return assetFolders.map((folder) => ({
    ...folder,
    assets: assets.filter((asset) => asset.folderId === folder.id),
  }));
}

function normalizeSearchQuery(query: string) {
  return query.trim().toLowerCase();
}

function matchesSearchText(query: string, values: Array<string | null | undefined>) {
  if (!query) {
    return true;
  }
  return values.some((value) => value?.toLowerCase().includes(query));
}

function startsWithSearchText(query: string, values: Array<string | null | undefined>) {
  if (!query) {
    return true;
  }
  return values.some((value) => value?.trim().toLowerCase().startsWith(query));
}

function buildAssetSearchValues(asset: EditorAsset) {
  return [
    asset.label,
    asset.prompt,
    asset.actualPrompt,
    asset.model,
    asset.provider,
    asset.taskId,
    asset.assetKind,
    asset.mediaType,
  ];
}

function buildLayerSearchValues(layer: CanvasLayer) {
  return [
    layer.title,
    layer.prompt,
    layer.actualPrompt,
    layer.model,
    layer.provider,
    layer.taskId,
    layer.assetKind,
    layer.mediaType,
  ];
}

function assetMatchesSearch(asset: EditorAsset, query: string) {
  return matchesSearchText(query, buildAssetSearchValues(asset));
}

function assetStartsWithSearch(asset: EditorAsset, query: string) {
  return startsWithSearchText(query, buildAssetSearchValues(asset));
}

export function layerMatchesSearch(layer: CanvasLayer, query: string) {
  return matchesSearchText(query, buildLayerSearchValues(layer));
}

export function layerStartsWithSearch(layer: CanvasLayer, query: string) {
  return startsWithSearchText(query, buildLayerSearchValues(layer));
}

export function filterGroupedAssetsBySearch(
  groupedAssets: GroupedAssetFolder[],
  query: string,
) {
  const normalizedQuery = normalizeSearchQuery(query);
  if (!normalizedQuery) {
    return groupedAssets;
  }

  return groupedAssets
    .map((folder) => {
      const folderMatches =
        startsWithSearchText(normalizedQuery, [folder.label]) ||
        matchesSearchText(normalizedQuery, [folder.label]);
      const prefixAssets = folder.assets.filter((asset) =>
        assetStartsWithSearch(asset, normalizedQuery),
      );
      const matchingAssets = folder.assets.filter((asset) =>
        assetMatchesSearch(asset, normalizedQuery),
      );
      return {
        ...folder,
        assets: folderMatches
          ? folder.assets
          : [
              ...prefixAssets,
              ...matchingAssets.filter(
                (asset) =>
                  !prefixAssets.some(
                    (prefixAsset) => prefixAsset.id === asset.id,
                  ),
              ),
            ],
      };
    })
    .filter((folder) => folder.assets.length > 0);
}

export function getSelectableAssets(assets: EditorAsset[]) {
  return assets.filter((asset) => asset.sourceKind === 'uploaded');
}

export type AssetShowcaseSubmissionState = {
  canSubmit: boolean;
  label: string;
  reason: string | null;
};

function normalizeAssetShowcaseReason(value: string | null | undefined) {
  return value?.trim() || null;
}

export function resolveAssetShowcaseSubmissionState(
  asset: EditorAsset,
): AssetShowcaseSubmissionState {
  const reviewStatus = asset.showcaseReviewStatus ?? null;

  if (reviewStatus === 'pending') {
    return {
      canSubmit: false,
      label: '精选审核中',
      reason: '素材正在审核中，请等待审核结果',
    };
  }

  if (reviewStatus === 'approved') {
    return {
      canSubmit: false,
      label:
        asset.showcaseDisplayEnabled === false
          ? '已入选精选，暂未展示'
          : '已入选精选',
      reason:
        asset.showcaseDisplayEnabled === false
          ? '素材已通过审核，运营后台开启展示后才会出现在前台'
          : '素材已经入选精选',
    };
  }

  if (reviewStatus === 'rejected') {
    return {
      canSubmit: false,
      label: '精选未通过',
      reason: '该素材审核未通过，不能重复提交',
    };
  }

  if (asset.sourceType !== 'generated') {
    return {
      canSubmit: false,
      label: '提交精选审核',
      reason: '只有生成素材可以提交精选审核',
    };
  }

  if (!asset.persisted) {
    return {
      canSubmit: false,
      label: '提交精选审核',
      reason: '素材保存完成后才能提交精选审核',
    };
  }

  if (!asset.src.trim()) {
    return {
      canSubmit: false,
      label: '提交精选审核',
      reason: '没有媒体内容的素材不能提交精选审核',
    };
  }

  return {
    canSubmit: true,
    label: '提交精选审核',
    reason: normalizeAssetShowcaseReason(asset.showcaseSubmitError),
  };
}

export function areAllSelectableAssetsSelected(
  selectableAssets: EditorAsset[],
  selectedAssetIds: Set<string>,
) {
  return (
    selectableAssets.length > 0 &&
    selectableAssets.every((asset) => selectedAssetIds.has(asset.id))
  );
}

export function renameAssetById(
  assets: EditorAsset[],
  assetId: string,
  label: string,
) {
  return assets.map((asset) =>
    asset.id === assetId
      ? {
          ...asset,
          label,
        }
      : asset,
  );
}

export function toggleAssetFolderCollapsed(
  assetFolders: EditorAssetFolder[],
  folderId: string,
) {
  return assetFolders.map((folder) =>
    folder.id === folderId
      ? {
          ...folder,
          collapsed: !folder.collapsed,
        }
      : folder,
  );
}

export function createLocalAssetFolder({
  folderId,
  label,
}: {
  folderId: string;
  label: string;
}): EditorAssetFolder {
  return {
    id: folderId,
    label,
    collapsed: false,
    systemDefault: false,
    persisted: false,
  };
}

export function replaceLocalAssetFolder({
  folders,
  assets,
  localFolderId,
  persistedFolder,
}: {
  folders: EditorAssetFolder[];
  assets: EditorAsset[];
  localFolderId: string;
  persistedFolder: {
    folderId: string;
    label: string;
    collapsed: boolean;
    systemDefault: boolean;
  };
}) {
  return {
    folders: folders.map((folder) =>
      folder.id === localFolderId
        ? {
            id: persistedFolder.folderId,
            label: persistedFolder.label,
            collapsed: persistedFolder.collapsed,
            systemDefault: persistedFolder.systemDefault,
            persisted: true,
          }
        : folder,
    ),
    assets: assets.map((asset) =>
      asset.folderId === localFolderId
        ? {
            ...asset,
            folderId: persistedFolder.folderId,
          }
        : asset,
    ),
  };
}

export function removeAssetById(assets: EditorAsset[], assetId: string) {
  return assets.filter((asset) => asset.id !== assetId);
}

export function renameAssetFolderById(
  assetFolders: EditorAssetFolder[],
  folderId: string,
  label: string,
) {
  return assetFolders.map((folder) =>
    folder.id === folderId
      ? {
          ...folder,
          label,
        }
      : folder,
  );
}

export function resolveDefaultAssetFolder(assetFolders: EditorAssetFolder[]) {
  return (
    assetFolders.find((folder) => folder.systemDefault) ?? assetFolders[0] ?? null
  );
}

export function resolveUploadAssetFolder(assetFolders: EditorAssetFolder[]) {
  return (
    assetFolders.find(
      (folder) => folder.label.trim() === EDITOR_UPLOAD_ASSET_FOLDER_LABEL,
    ) ?? null
  );
}

export function resolvePreferredAssetUploadFolder(
  assetFolders: EditorAssetFolder[],
) {
  return resolveUploadAssetFolder(assetFolders) ?? resolveDefaultAssetFolder(assetFolders);
}

export function deleteAssetFolderLocally({
  folders,
  assets,
  folderId,
  defaultFolderId,
}: {
  folders: EditorAssetFolder[];
  assets: EditorAsset[];
  folderId: string;
  defaultFolderId: string;
}) {
  return {
    folders: folders.filter((folder) => folder.id !== folderId),
    assets: assets.map((asset) =>
      asset.folderId === folderId
        ? {
            ...asset,
            folderId: defaultFolderId,
          }
        : asset,
    ),
  };
}

export function toggleAssetSelection(
  selectedAssetIds: Set<string>,
  assetId: string,
) {
  const nextIds = new Set(selectedAssetIds);
  if (nextIds.has(assetId)) {
    nextIds.delete(assetId);
  } else {
    nextIds.add(assetId);
  }
  return nextIds;
}

export function resolveAllAssetSelection({
  allSelectableAssetsSelected,
  selectableAssets,
}: {
  allSelectableAssetsSelected: boolean;
  selectableAssets: EditorAsset[];
}) {
  return allSelectableAssetsSelected
    ? new Set<string>()
    : new Set(selectableAssets.map((asset) => asset.id));
}

export function removeSelectedAssets(
  assets: EditorAsset[],
  selectedAssetIds: Set<string>,
) {
  const deletedAssets = assets.filter((asset) => selectedAssetIds.has(asset.id));
  return {
    assets: assets.filter((asset) => !selectedAssetIds.has(asset.id)),
    deletedAssets,
  };
}

export function moveAssetToFolderLocally(
  assets: EditorAsset[],
  assetId: string,
  folderId: string,
) {
  return assets.map((asset) =>
    asset.id === assetId
      ? {
          ...asset,
          folderId,
        }
      : asset,
  );
}