const md5 = require('md5');
const vnModel = require('vn-loopback/common/models/vn-model');
const LoopBackContext = require('loopback-context');
const {Email} = require('vn-print');

module.exports = function(Self) {
    vnModel(Self);

    require('../methods/vn-user/signIn')(Self);
    require('../methods/vn-user/acl')(Self);
    require('../methods/vn-user/recover-password')(Self);
    require('../methods/vn-user/validate-token')(Self);
    require('../methods/vn-user/privileges')(Self);

    // Validations

    Self.validatesFormatOf('email', {
        message: 'Invalid email',
        allowNull: true,
        allowBlank: true,
        with: /^[\w|.|-]+@[\w|-]+(\.[\w|-]+)*(,[\w|.|-]+@[\w|-]+(\.[\w|-]+)*)*$/
    });

    Self.validatesUniquenessOf('name', {
        message: `A client with that Web User name already exists`
    });

    Self.observe('before save', async function(ctx) {
        if (ctx.currentInstance && ctx.currentInstance.id && ctx.data && ctx.data.password)
            ctx.data.password = md5(ctx.data.password);
    });

    Self.remoteMethod('getCurrentUserData', {
        description: 'Gets the current user data',
        accepts: [
            {
                arg: 'ctx',
                type: 'Object',
                http: {source: 'context'}
            }
        ],
        returns: {
            type: 'Object',
            root: true
        },
        http: {
            verb: 'GET',
            path: '/getCurrentUserData'
        }
    });

    Self.getCurrentUserData = async function(ctx) {
        let userId = ctx.req.accessToken.userId;
        return await Self.findById(userId, {
            fields: ['id', 'name', 'nickname']
        });
    };

    /**
     * Checks if user has a role.
     *
     * @param {Integer} userId The user id
     * @param {String} name The role name
     * @param {Object} options Options
     * @return {Boolean} %true if user has the role, %false otherwise
     */
    Self.hasRole = async function(userId, name, options) {
        const roles = await Self.getRoles(userId, options);
        return roles.some(role => role == name);
    };

    /**
     * Get all user roles.
     *
     * @param {Integer} userId The user id
     * @param {Object} options Options
     * @return {Object} User role list
     */
    Self.getRoles = async(userId, options) => {
        const result = await Self.rawSql(
            `SELECT r.name
                FROM account.user u
                    JOIN account.roleRole rr ON rr.role = u.role
                    JOIN account.role r ON r.id = rr.inheritsFrom
                WHERE u.id = ?`, [userId], options);

        const roles = [];
        for (const role of result)
            roles.push(role.name);

        return roles;
    };

    Self.on('resetPasswordRequest', async function(info) {
        const loopBackContext = LoopBackContext.getCurrentContext();
        const httpCtx = {req: loopBackContext.active};
        const httpRequest = httpCtx.req.http.req;
        const headers = httpRequest.headers;
        const origin = headers.origin;

        const user = await Self.app.models.VnUser.findById(info.user.id);
        const params = {
            recipient: info.email,
            lang: user.lang,
            url: `${origin}/#!/reset-password?access_token=${info.accessToken.id}`
        };

        const options = Object.assign({}, info.options);
        for (const param in options)
            params[param] = options[param];

        const email = new Email(options.emailTemplate, params);

        return email.send();
    });
};