const { argv } = require("process");
const fs = require("fs-extra");
const mustache = require("mustache");
const bodyParser = require("body-parser");
const glob = require("glob");
const path = require("path");
const cors = require("cors");
const express = require("express");
const process = require("process");

/*******************************************

SEE https://gitea.ndda.fr/apxtri/apxtri/wiki/Devrules
To have a quick understanding and convention before doing deeply in source code

To share configuration :
 process.env.dirtown  is folder where town folder name /townId-nationId is accessible
 const conf = require(`../../conf/townconf.json`); 
 app.locals.tribeids is defined later in apixtrib.js and allow express app to always have in memory a dynamic of tribeId available in req.app.locals.tribeids
*/
/**
 * 1st install for dev
 *  run $ node apxtri.js nationId:ants townId:devfarm dns:devfarm-ants
 *  then just yarn dev
 *   it create a folder outside ../townId-nationId/
 * To convert a dev into a chain town run again with relevant param:
 *  run $ node apxtri.js nationId:ants townId:devfarm dns:devfarm-ants
 *  check the web interface http://dns
 *  then just yarn startpm2 your town is under PM2 control
 *
 *
 * @param {args} args key:value  example node apxtri nationId:ants townId:devfarm dns:devfarm-ants
 *                  if no parameter from adminapi/www/adminapx/conf/setup_xx.json
 *
 * Keyword townId = "devfarm" then this is unchain town to dev
 *                            else this is a production town ready to chain to the nationId
 *
 * @returns listen onto http:/dns (80 and 443) for admin webapp and http://localhost:initconf.api.port
 * by setting the nginx parameter
 * A folder for town data is created at the same level than apxtri as /townId-nationId/conf.json ...
 */

// check nginx exist
if (!fs.existsSync("/etc/nginx/nginx.conf")) {
  console.log(
    "\x1b[31m Check documentation, nginx have to be installed on this server first, no /etc/nginx/nginx.conf available, install then rerun yarn command."
  );
  process.exit();
}
const param = {};
argv.slice(2).forEach((arg) => {
  const kv = arg.split(":");
  if (kv.length == 2) {
    param[kv[0]] = kv[1];
  }
});
if (!fs.existsSync("../conf/townconf.json")) {
  // This is a first install
  const nam = path.resolve("..").split("/").slice(-1)[0].split("-");
  const town = nam[0];
  const nation = nam[1];
  // doit exister param.dns pour mettre à jour le conf.json pour la conf adminapi
  //run setup process
}

// setup_xx.json is gitignore so at first install we are in dev configuration
/*
let infotown = {
  nationId: "ants",
  townId: "devfarm",
  dns: "devfarm-ants",
  comment:
    "Auto generate setup from apxtri after node apxtri nationId:value townId:value dns:domaine_to_access",
};
if (fs.existsSync(`${__dirname}/adminapi/www/adminapx/conf/setup_xx.json`)) {
  infotown = fs.readJsonSync(
    `${__dirname}/adminapi/www/adminapx/conf/setup_xx.json`
  );
}
if (
  Object.keys(param).length > 0 &&
  param.nationId &&
  param.townId &&
  param.dns
) {
  infotown.nationId = param.nationId;
  infotown.townId = param.townId;
  infotown.dns = param.dns;
}
fs.outputJsonSync(
  `${__dirname}/adminapi/www/adminapx/conf/setup_xx.json`,
  infotown
);
infotown.dirapi = __dirname;
infotown.dirtown = path.resolve(
  `${__dirname}/../${infotown.townId}-${infotown.nationId}`
);
process.env.dirtown = infotown.dirtown;
infotown.dirapxwebapp = path.resolve(`${infotown.dirapi}/..`); //same level as apxtri
if (
  !fs.existsSync(`${infotown.dirtown}/conf.json`) ||
  !fs.existsSync(`${__dirname}/adminapi/www/nginx_adminapx.conf`)
) {
  // Case of new town or request a reset of dns to access adminapx
  // genere a minimum conf with nationId, townId, dns, dirapi, dirtown
  fs.outputJsonSync(`${infotown.dirtown}/conf.json`, infotown, { space: 2 });
  const Towns = require("./api/models/Towns");
  const rescreate = Towns.create();
  if (rescreate.status != 200) {
    console.log("Sorry error ");
    process.exit();
  }
}
*/
const conf = require(path.resolve(`../conf/townconf.json`));
const currentmod = "apxtri";
const log = conf.api.activelog.includes(currentmod);

// Create and update ./nationchains plutot que cette fonction
// A creuser et voir comment synchro
/*const { updateobjectsfromfreshesttown } = require("./models/Nations.js");
updateobjectsfromfreshesttown(conf.towns, {
  pagans: "alias_all.json",
  towns: "townId_all.json",
  nations: "nationId_all.json",
});
*/
// Run main express process for a /towId-nationId/tribes

let tribelist = {};
if (fs.existsSync(`../nationchains/tribes/idx/tribeId_all.json`)) {
  tribelist = fs.readJsonSync(`../nationchains/tribes/idx/tribeId_all.json`);
}
let doms = conf.dns; // only dns of town during the init process
let tribeIds = [];
let routes = glob.sync(`./routes/*.js`).map((f) => {
  return { url: `/${path.basename(f, ".js")}`, route: f };
});

glob.sync(`../nationchains/tribes/*/api/routes/*.js`).forEach((f) => {
  const ids = f.indexOf(`../nationchains/tribes/`);
  const trib = f.slice(
    ids + `../nationchains/tribes/`.length,
    f.lastIndexOf("/api/routes")
  );
  routes.push({ url: `/${trib}/${path.basename(f, ".js")}`, route: f });
});
//routes={url,route} check how to add plugin tribe route later
// keep only the 2 last part (.) of domain name to validate cors with it (generic domain)
Object.keys(tribelist).forEach((t) => {
  tribelist[t].dns.forEach((d) => {
    const dm = d.split(".").slice(-2).join(".");
    if (!doms.includes(dm)) doms.push(dm);
  });
  tribeIds.push(t);
});
if (log)
  console.log(
    currentmod,
    " Allowed DOMs to access to this apxtri server:",
    JSON.stringify(doms)
  );

const app = express();
// load express parameter from conf
Object.keys(conf.api.appset).forEach((p) => {
  app.set(p, conf.api.appset[p]);
});
// To set depending of data form or get size to send
app.use(bodyParser.urlencoded(conf.api.bodyparse.urlencoded));
// To set depending of post put json data size to send
app.use(express.json());
app.use(bodyParser.json(conf.api.bodyparse.json));
app.disable("x-powered-by"); // for security
app.locals.tribeids = tribeIds;
if (log) console.log(currentmod, " app.locals.tribeids", app.locals.tribeids);
// Cors management
let originlst = "test";
doms.forEach((d) => {
  originlst += `|${d.replace(/\./g, "\\.")}`;
});
const regtxt = `^http.?:\/\/(${originlst})`;
let cor = false;
const regorigin = new RegExp(regtxt);
app.use((req, res, next) => {
  if (req.headers.origin == undefined) {
    cor = true;
  } else {
    cor = regorigin.test(req.headers.origin);
  }
  if (log)
    console.log(
      currentmod,
      "request origin:",
      req.headers.origin,
      "testcors:",
      cor, "headers allowed: [", conf.api.exposedHeaders.join(','),"] match with reg:", regtxt
    );
  cors({
    origin: cor,
    allowedHeaders: conf.api.exposedHeaders,
    exposedHeaders: conf.api.exposedHeaders,
    credentials: true,
    preflightContinue: false,
    optionsSuccessStatus: 204
  });
  next();
});

// Routers add any routes from /routes and /plugins
let logroute = "Routes available on this apxtri instance: \n";
routes.forEach((r) => {
  try {
    logroute += r.url.padEnd(30, " ") + r.route + "\n";
    app.use(r.url, require(r.route));
  } catch (err) {
    logroute += " (err check it module.exports=router;? or ...)\n======\n ";
    console.log("raise err-:", err);
  }
});
if (log) {
  console.log(currentmod, logroute);
  if (process.env.NODE_MODE == "dev")
    console.log(
      `\x1b[42m############################################################################################\x1b[0m\n\x1b[42mThis is dev conf accessible in http://dev-ants to switch this as production, you must run:\n 1 - 'yarn dev nationId:ants townId:dev dns:dev-ants' to conf your town and check it.\n 2 - 'yarn startpm2'\n Where:\n\x1b[42m * nationId have to exist in the nationchains\n * townId new or if exist must have the same current dns,\n * dns domaine that has to redirect 80/443 into this server.\n Check README's project to learn more.\x1b[0m\n To work with apxweb for the front use http://dev-ants/apxwebapp/www/websitename/src/index.html to use the api during dev process\n\x1b[42m############################################################################################\x1b[0m`
    );
}

app.listen(conf.api.port, () => {
  let webaccess = `api waits request on port:${conf.api.port} for`;
  conf.dns.forEach((u) => {
    webaccess += `${u}/api/ `;
  });
  if (log) console.log(currentmod, webaccess);
});
console.log(
  "\x1b[42m\x1b[37m",
  "Made with love for people's freedom, enjoy !!!",
  "\x1b[0m"
);