const becca = require('../becca/becca.js');
const eu = require('./etapi_utils.js');
const mappers = require('./mappers.js');
const v = require('./validators.js');
const utils = require('../services/utils.js');

function register(router) {
    const ALLOWED_PROPERTIES_FOR_CREATE_ATTACHMENT = {
        'ownerId': [v.notNull, v.isNoteId],
        'role': [v.notNull, v.isString],
        'mime': [v.notNull, v.isString],
        'title': [v.notNull, v.isString],
        'position': [v.notNull, v.isInteger],
        'content': [v.isString],
    };

    eu.route(router, 'post' ,'/etapi/attachments', (req, res, next) => {
        const params = {};

        eu.validateAndPatch(params, req.body, ALLOWED_PROPERTIES_FOR_CREATE_ATTACHMENT);

        try {
            const note = becca.getNoteOrThrow(params.ownerId);
            const attachment = note.saveAttachment(params);

            res.status(201).json(mappers.mapAttachmentToPojo(attachment));
        }
        catch (e) {
            throw new eu.EtapiError(500, eu.GENERIC_CODE, e.message);
        }
    });

    eu.route(router, 'get', '/etapi/attachments/:attachmentId', (req, res, next) => {
        const attachment = eu.getAndCheckAttachment(req.params.attachmentId);

        res.json(mappers.mapAttachmentToPojo(attachment));
    });

    const ALLOWED_PROPERTIES_FOR_PATCH = {
        'role': [v.notNull, v.isString],
        'mime': [v.notNull, v.isString],
        'title': [v.notNull, v.isString],
        'position': [v.notNull, v.isInteger],
    };

    eu.route(router, 'patch' ,'/etapi/attachments/:attachmentId', (req, res, next) => {
        const attachment = eu.getAndCheckAttachment(req.params.attachmentId);

        if (attachment.isProtected) {
            throw new eu.EtapiError(400, "ATTACHMENT_IS_PROTECTED", `Attachment '${req.params.attachmentId}' is protected and cannot be modified through ETAPI.`);
        }

        eu.validateAndPatch(attachment, req.body, ALLOWED_PROPERTIES_FOR_PATCH);
        attachment.save();

        res.json(mappers.mapAttachmentToPojo(attachment));
    });

    eu.route(router, 'get', '/etapi/attachments/:attachmentId/content', (req, res, next) => {
        const attachment = eu.getAndCheckAttachment(req.params.attachmentId);

        if (attachment.isProtected) {
            throw new eu.EtapiError(400, "ATTACHMENT_IS_PROTECTED", `Attachment '${req.params.attachmentId}' is protected and content cannot be read through ETAPI.`);
        }

        const filename = utils.formatDownloadTitle(attachment.title, attachment.role, attachment.mime);

        res.setHeader('Content-Disposition', utils.getContentDisposition(filename));

        res.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
        res.setHeader('Content-Type', attachment.mime);

        res.send(attachment.getContent());
    });

    eu.route(router, 'put', '/etapi/attachments/:attachmentId/content', (req, res, next) => {
        const attachment = eu.getAndCheckAttachment(req.params.attachmentId);

        if (attachment.isProtected) {
            throw new eu.EtapiError(400, "ATTACHMENT_IS_PROTECTED", `Attachment '${req.params.attachmentId}' is protected and cannot be modified through ETAPI.`);
        }

        attachment.setContent(req.body);

        return res.sendStatus(204);
    });

    eu.route(router, 'delete' ,'/etapi/attachments/:attachmentId', (req, res, next) => {
        const attachment = becca.getAttachment(req.params.attachmentId);

        if (!attachment) {
            return res.sendStatus(204);
        }

        attachment.markAsDeleted();

        res.sendStatus(204);
    });
}

module.exports = {
    register
};