#!/usr/bin/env node

const fetch = require('node-fetch');
const colors = require('colors');
const os = require('os');
const fs = require('fs');
const getopts = require('getopts');

const homeDir = os.homedir();
const configFile = `${homeDir}/.grafana-find.json`;

if (!fs.existsSync(configFile)) {
    console.error(`Configuration file not found: ${configFile}`.red);
    process.exit(1);
}

const findAll = `Client`;

const config = require(configFile);
const grafanaUrl = config.grafanaUrl;

const grafanaApi = `${grafanaUrl}/api`;
const urlDashboards = `${grafanaApi}/search`;
const urlUID = `${grafanaApi}/dashboards/uid/`;
let numberOfDashboards = 0;
let numberOfPanels = 0;
let numberOfVariables = 0;
let numberOfObjects = 0;
let titlePanels = new Array;
let nameVariables = new Array;

const regexRawSQL = new RegExp(findAll, 'i');

const user = `guillermo`;

async function main(){

    const readline = require('readline');
    const rl = readline.createInterface({
        input: process.stdin,
        output: process.stdout
    });

    const answer = await new Promise(resolve => {
        rl.question(colors.yellow('Enter your password: '), resolve);
    });
    if (!answer) {
        console.error(`You need to put a password`.red);
        process.exit(0);
    }
    const passw = `${answer}`;

    const credentials = `Basic ` + Buffer.from(`${user}:${passw}`).toString('base64');
    rl.close();
    
    console.clear();
    console.log(colors.green.bold(`-------------------- Starting process --------------------`));

    let responseAllUID = await fetch(urlDashboards, {
        method: "GET",
        headers: {
            "Authorization": credentials,
            "Content-Type" : "application/json"
        }
    });
    
    let allUID = await responseAllUID.json();

    for (let i=0; i < allUID.length; i++) {

        let url = urlUID + allUID[i].uid;
        let response = await fetch(url, {
            method: "GET",
            headers: {
                "Authorization": credentials,
            }
        });
        let data = await response.json();

        let isFound = false;

        const dashboard = data.dashboard;
        if (dashboard) {
            if (dashboard.panels)
            for (const panel of dashboard.panels) {
                if (panel.targets)
                for (const target of panel.targets) {
                    isFound = regexRawSQL.test(target.rawSql);
                    if (isFound) {
                        if (panel.title)
                            titlePanels.push(panel.title);
                        else
                            titlePanels.push("?");
                        numberOfPanels++;
                    }
                }
            }

            if (dashboard.templating)
            for (const list of dashboard.templating.list) {
                isFound = regexRawSQL.test(list.query);
                if (isFound) {
                    nameVariables.push(list.name)
                    numberOfVariables++;
                }
            }
        }

        if (isFound) {
            const linkUrl = `${grafanaUrl}/d/${allUID[i].uid}`;
            console.log(colors.yellow(linkUrl));
            if (numberOfPanels) {
                console.log(colors.cyan.bold(`> ${numberOfPanels} panels`));
                console.log(colors.cyan(titlePanels.toString().split(",")));
            }
            if (numberOfVariables) {
                console.log(colors.magenta.bold(`> ${numberOfVariables} variables`));
                console.log(colors.magenta(nameVariables.toString().split(",")));
            }
            numberOfDashboards++;
        }

        titlePanels = [];
        nameVariables= [];
        numberOfObjects = numberOfPanels + numberOfVariables + numberOfObjects
        numberOfPanels=0;
        numberOfVariables=0;
    }

    if (numberOfDashboards==0)
        console.log(`No results found`.red);
    else 
        console.log(colors.green.bold(`-------- Have been found ${numberOfObjects} results in ${numberOfDashboards} dashboards -------`));

    process.exit(0);
}
main();