/* eslint-disable max-statements-per-line */
import {Response} from 'ember-cli-mirage';

export function paginatedResponse(modelName) {
    return function (schema, request) {
        let page = +request.queryParams.page || 1;
        let limit = request.queryParams.limit || 15;
        let pages, next, prev, models;

        let allModels = this.serialize(schema[modelName].all())[modelName];

        if (limit === 'all') {
            pages = 1;
        } else {
            limit = +limit;

            let start = (page - 1) * limit;
            let end = start + limit;

            pages = Math.ceil(allModels.length / limit);
            models = allModels.slice(start, end);

            if (start > 0) {
                prev = page - 1;
            }

            if (end < allModels.length) {
                next = page + 1;
            }
        }

        return {
            meta: {
                pagination: {
                    page,
                    limit,
                    pages,
                    total: allModels.length,
                    next: next || null,
                    prev: prev || null
                }
            },
            [modelName]: models || allModels
        };
    };
}

export function maintenanceResponse() {
    return new Response(503, {}, {
        errors: [{
            errorType: 'Maintenance'
        }]
    });
}

export function versionMismatchResponse() {
    return new Response(400, {}, {
        errors: [{
            errorType: 'VersionMismatchError'
        }]
    });
}