'use strict';

var loopback = require('loopback');
var boot = require('loopback-boot');

var app = module.exports = loopback();

var initialization = function() {
  var fs = require('fs');
  var path = require('path');
  var outputPath = path.resolve(__dirname, '../common/models');
  var configPath = path.resolve(__dirname, '../server');

  var datasource = app.dataSources.wordpress;

  var modelsFile = new Promise((resolve, reject) => fs.readFile('server/model-config.json', function(error, content) {
      if (error) console.log(error); else {
        var jsonModels = JSON.parse(content);
        resolve(jsonModels);
      }
    })
  );

  datasource.discoverModelDefinitions({schema: 'tailor', views: false, all: true}, function(error, models) {
      if (error) console.log(error); else {
        var promises = [];
        for (var index in models) {
          promises.push(new Promise((resolve, reject) => datasource.discoverAndBuildModels(models[index].name, {associations: true, nameMapper: (type, name) => name}, function(innerError, definition) {
              if (innerError) reject(innerError); else {
                  var name = Object.keys(definition)[0];
                  definition[name].setup();
                  fs.writeFile(outputPath + '/' + name + '.json', JSON.stringify(definition[name].definition), function(fileError) {
                    if (fileError)
                      reject(fileError); // This is a callback hell! You may also use promises.
                    else {
                      resolve(name);
                    }
                  });
              }
            })
          ));
        }

        modelsFile.then(content => Promise.all(promises).then(values => {
          values.forEach(modelName => content[modelName] = { public: true, dataSource: "wordpress" });
          fs.writeFile(configPath + '/model-config.json', JSON.stringify(content), function(fileError) {
            if (fileError)
              console.log(fileError);
            else
              console.log('Models definitions done');

              process.exit();
          });
        }));
      }
    }
  );
};

// Bootstrap the application, configure models, datasources and middleware.
// Sub-apps like REST API are mounted via boot scripts.
boot(app, __dirname, function(err) {
  if (err) throw err;

  initialization();
});