var microtime = require('microtime');

const match = require('../utils/match-util.js');
const memory_usage = require('../utils/mem-usage.js');

const products = require('../data/products.json');

// memory_usage.report();

// test runner
function run(query) {

    var f0 = microtime.nowDouble();
    let result;
    // for(let i = 0 ; i < 20 ; i++)
        result = matchQuery(query);
    var f1 = microtime.nowDouble();

    memory_usage.report();

    return {
        t: f1-f0,
        q: query,
        result: result
    }
}

// sumple search implementation
function matchQuery(q) {
    var result = [];

    for(let i = 0; i < products.length; i++) {
        let found = false;
        let similarity = 0;
        products[i].kb.split(' ').forEach( w => {
            let sim = match.resemblance(q, w, 2);
            if (sim > 0.5) {
                found = true;
                similarity = (sim > similarity) ? sim : similarity;
            }    
        });
        if (found) {
            products[i].similarity = similarity;
            result.push(products[i]);
        } 
    }

    return result
}


module.exports = { run }