import { Request } from 'express';
import becca = require('../../becca/becca');
import bulkActionService = require('../../services/bulk_actions');

function execute(req: Request) {
    const {noteIds, includeDescendants} = req.body;

    const affectedNoteIds = getAffectedNoteIds(noteIds, includeDescendants);

    const bulkActionNote = becca.getNoteOrThrow('_bulkAction');

    bulkActionService.executeActions(bulkActionNote, affectedNoteIds);
}

function getAffectedNoteCount(req: Request) {
    const {noteIds, includeDescendants} = req.body;

    const affectedNoteIds = getAffectedNoteIds(noteIds, includeDescendants);

    return {
        affectedNoteCount: affectedNoteIds.size
    };
}

function getAffectedNoteIds(noteIds: string[], includeDescendants: boolean) {
    const affectedNoteIds = new Set<string>();

    for (const noteId of noteIds) {
        const note = becca.getNote(noteId);

        if (!note) {
            continue;
        }

        affectedNoteIds.add(noteId);

        if (includeDescendants) {
            for (const descendantNoteId of note.getDescendantNoteIds()) {
                affectedNoteIds.add(descendantNoteId);
            }
        }
    }
    return affectedNoteIds;
}

export = {
    execute,
    getAffectedNoteCount
};