const UserError = require('vn-loopback/util/user-error');

module.exports = Self => {
    Self.remoteMethodCtx('setPicked', {
        description: 'Add the sales line of the item and set the tracking.',
        accessType: 'WRITE',
        accepts: [
            {
                arg: 'saleFk',
                type: 'number',
                required: true
            },
            {
                arg: 'originalQuantity',
                type: 'number',
                required: true
            },
            {
                arg: 'code',
                type: 'string',
                required: true
            },
            {
                arg: 'isChecked',
                type: 'boolean',
                required: true
            },
            {
                arg: 'buyFk',
                type: 'number',
                required: true
            },
            {
                arg: 'isScanned',
                type: 'boolean',
            },
            {
                arg: 'quantity',
                type: 'number',
                required: true
            },
            {
                arg: 'itemShelvingFk',
                type: 'number',
                required: true
            }
        ],
        http: {
            path: `/setPicked`,
            verb: 'POST'
        }
    });

    Self.setPicked = async(ctx, saleFk, originalQuantity, code, isChecked, buyFk, isScanned, quantity, itemShelvingFk, options) => {
        const userId = ctx.req.accessToken.userId;
        const models = Self.app.models;
        const myOptions = {};
        let tx;

        if (typeof options == 'object')
            Object.assign(myOptions, options);

        if (!myOptions.transaction) {
            tx = await Self.beginTransaction({});
            myOptions.transaction = tx;
        }

        try {
            await models.ItemShelvingSale.create({
                itemShelvingFk,
                saleFk,
                quantity,
                userFk: userId
            }, myOptions);

            const itemShelving = await models.ItemShelving.findById(itemShelvingFk, null, myOptions);

            await itemShelving.updateAttributes({visible: itemShelving.visible - quantity}, myOptions);

            await Self.updateAll(
                {saleFk},
                {isChecked: true},
                myOptions
            );

            await Self.updateTracking(ctx, saleFk, originalQuantity, code, isChecked, null, isScanned, myOptions);

            try {
                const {itemOriginalFk} = await models.Buy.findById(buyFk, {fields: ['itemOriginalFk']}, myOptions);
                if (itemOriginalFk) await models.SaleBuy.create({saleFk, buyFk}, myOptions);
            } catch (e) {
                throw new UserError('The sale cannot be tracked');
            }

            if (tx) await tx.commit();
        } catch (e) {
            if (e.message == 'The sale cannot be tracked') {
                if (tx) tx.commit();
                throw e;
            }

            if (tx) await tx.rollback();
            throw new UserError('The line could not be marked');
        }
    };
};