"use strict";

import sql = require('../../sql');
import utils = require('../../../services/utils');
import AbstractShacaEntity = require('./abstract_shaca_entity');
import SNote = require('./snote');
import { Blob } from '../../../services/blob-interface';

class SAttachment extends AbstractShacaEntity {
    private attachmentId: string;
    private ownerId: string;
    title: string;
    private role: string;
    private mime: string;
    private blobId: string;
    /** used for caching of images */
    private utcDateModified: string;

    constructor([attachmentId, ownerId, role, mime, title, blobId, utcDateModified]: SAttachmentRow) {
        super();

        this.attachmentId = attachmentId;
        this.ownerId = ownerId;
        this.title = title;
        this.role = role;
        this.mime = mime;
        this.blobId = blobId;
        this.utcDateModified = utcDateModified;

        this.shaca.attachments[this.attachmentId] = this;
        this.shaca.notes[this.ownerId].attachments.push(this);
    }

    get note(): SNote {
        return this.shaca.notes[this.ownerId];
    }

    getContent(silentNotFoundError = false) {
        const row = sql.getRow<Pick<Blob, "content">>(`SELECT content FROM blobs WHERE blobId = ?`, [this.blobId]);

        if (!row) {
            if (silentNotFoundError) {
                return undefined;
            }
            else {
                throw new Error(`Cannot find blob for attachment '${this.attachmentId}', blob '${this.blobId}'`);
            }
        }

        let content = row.content;

        if (this.hasStringContent()) {
            return content === null
                ? ""
                : content.toString("utf-8");
        }
        else {
            return content;
        }
    }

    /** @returns true if the attachment has string content (not binary) */
    hasStringContent() {
        return utils.isStringNote(null, this.mime);
    }

    getPojo() {
        return {
            attachmentId: this.attachmentId,
            role: this.role,
            mime: this.mime,
            title: this.title,
            blobId: this.blobId,
            utcDateModified: this.utcDateModified
        };
    }
}

export = SAttachment;