const UserError = require('../../../common/helpers').UserError;
let pick = require('object.pick');
let diff = require('object-diff');

module.exports = Self => {
    Self.remoteMethodCtx('updateClaim', {
        description: 'Update a claim with privileges',
        accessType: 'WRITE',
        accepts: [{
            arg: 'params',
            type: 'object',
            required: true,
            description: 'ticketFk, stateFk',
            http: {source: 'body'}
        }],
        returns: {
            type: 'string',
            root: true
        },
        http: {
            path: `/updateClaim`,
            verb: 'post'
        }
    });

    Self.updateClaim = async (ctx, params) => {
        let models = Self.app.models;
        let isSalesAssistant;
        let token = ctx.req.accessToken;
        let currentUserId = token && token.userId;

        isSalesAssistant = await models.Account.hasRole(currentUserId, 'SalesAssistant');

        if (!isSalesAssistant) {
            let oldClaim = await models.Claim.findById(params.id);
            let notModifiable = ['responsibility', 'isChargedToMana'];
            let changedFields = diff(oldClaim, params);
            let changedFieldsPicked = pick(changedFields, notModifiable);
            let statesViables = ['Gestionado', 'Pendiente', 'Anulado'];
            let oldState = await models.ClaimState.findOne({where: {id: oldClaim.claimStateFk}});
            let newState = await models.ClaimState.findOne({where: {id: params.claimStateFk}});
            let canChangeState = statesViables.includes(oldState.description)
                && statesViables.includes(newState.description);
            if (Object.keys(changedFieldsPicked).length != 0 || !canChangeState)
                throw new UserError(`You don't have enough privileges to change that field`);
        }

        return await Self.updateAll({id: params.id}, params);
    };
};