/*====================================
=            Dependencies            =
====================================*/

var _s         = require('underscore.string');
var colors     = require('colors');
var fs         = require('fs');
var OAuth      = require('oauth');
var superagent = require('superagent');

/*=====  End of Dependencies  ======*/

/*=============================================
=            Environment variables            =
=============================================*/

var idUrl        = 'https://id.api.isogeo.com'; // Isogeo oAuth Url
var apiUrl       = 'https://v1.api.isogeo.com'; // Isogeo API Url
var clientId     = '<the oAuth client id goes here>'; // Application oAuth identifier
var clientSecret = '<the oAuth secret id goes here>'; // Application oAuth secret

/*=====  End of Environment variables  ======*/


/*===============================
=            Helpers            =
===============================*/

function errorMsg (msg) {
    console.log(colors.red(msg));
}

function primaryMsg (msg) {
    console.log(colors.cyan(msg));
}

function infoMsg (msg) {
    console.log(msg);
}

function successMsg (msg) {
    console.log(colors.green(msg));
}

/*=====  End of Helpers  ======*/


/**
 * Make a GET request trought
 * the Isogeo API
 *
 * @param  {string} path - Path of the resource
 * @param  {object} query - Data send to the API as query
 * @param  {string} token - The security token
 * @param  {Function} cb - Called after execution
 */
function makeRequest (method, path, query, token, cb) {

    var requestUrl = apiUrl + path;
    
    infoMsg('Envoie de la requête ' + requestUrl);

    superagent.get(requestUrl)
    .set('Authorization', 'Bearer ' + token) // add the Authorization header with access token
    .query(query)
    .end(function (err, response) {
        infoMsg('Requête terminée avec le code ' + response.statusCode);

        if (err) {
            if (response.body.error) errorMsg(response.body.error);
            return cb(err);
        }

        cb(null, response.body);
    });
}
/**
 * Callback used by getToken.
 * @callback Function
 * @param {object} error
 * @param {[type]} response
 */



/**
 * 
 * The script starts here
 * 
 */

primaryMsg('Récupération du token');

// new oAuth library instanciation
var oauth = new OAuth.OAuth2(
    clientId, // clientId
    clientSecret, // clientSecret
    idUrl, // baseSite
    null, // authorizePath (we do not need it)
    '/oauth/token', // accessTokenPath
    { //customHeaders
        'Accept-Language': 'fr' // get API response in french
    } 
);

// thanks oAuth library, it does all the work
oauth.getOAuthAccessToken('', {
    'grant_type': 'client_credentials'
}, function (err, access_token, refresh_token, results) {

    if (err) {
        return errorMsg(err);
    }

    if (!access_token) {
        return errorMsg('access_token is undefined');
    }

    // refresh_token is null
    // results contains all the response body so results.access_token === access_token

    infoMsg('Token valable pendant ' + results.expires_in + ' secondes');

    successMsg('Token récupéré sans erreur');

    primaryMsg('Requête à l\'API');

    var path = '/resources/ac77298cbe5c41ed95e950ade8fe7e97';
    var query = {
        _include: 'keywords'
    };

    makeRequest(path, query, access_token, function (err, data) {
        if (err) {
            return errorMsg(err);
        }
        successMsg('Requête effectuée sans erreur');

        primaryMsg('Génération d\'un fichier');
        
        // generate file name with path and query
        var filename = _s.join('-', _s.slugify(path), _s.slugify(JSON.stringify(query)));

        // file creation
        var resultFile = fs.createWriteStream(filename + '.json', {
            encoding: 'UTF-8'
        });
        // data writing
        resultFile.write(JSON.stringify(data), function () {
            resultFile.end();
        });

        successMsg('Création du fichier ' + filename + ' réussi');
    });
});

/*====================================
=            Dependencies            =
====================================*/

var OAuth  = require('oauth');

/*=====  End of Dependencies  ======*/

/*=============================================
=            Environment variables            =
=============================================*/

var idUrl        = 'https://id.api.isogeo.com'; // Isogeo oAuth Url
var clientId     = '<the oAuth client id goes here>'; // Application oAuth identifier
var clientSecret = '<the oAuth secret id goes here>'; // Application oAuth secret

/*=====  End of Environment variables  ======*/


/**
 * 
 * The script starts here
 * 
 */

console.log('Récupération du token');

// new oAuth library instanciation
var oauth = new OAuth.OAuth2(
    clientId, // clientId
    clientSecret, // clientSecret
    idUrl, // baseSite
    null, // authorizePath (we do not need it)
    '/oauth/token', // accessTokenPath
    { //customHeaders
        'Accept-Language': 'fr' // get API response in french
    } 
);

// thanks oAuth library, it does all the work
oauth.getOAuthAccessToken('', {
    'grant_type': 'client_credentials'
}, function (err, access_token, refresh_token, results) {

    if (err) {
        return console.log(err);
    }

    if (!access_token) {
        return console.log('access_token is undefined');
    }

    // refresh_token is null
    // results contains all the response body so results.access_token === access_token

    console.log(err);
    console.log(access_token);
    console.log(refresh_token);
    console.log(results);

});

/*====================================
=            Dependencies            =
====================================*/

var OAuth      = require('oauth');
var superagent = require('superagent');

/*=====  End of Dependencies  ======*/

/*=============================================
=            Environment variables            =
=============================================*/

var apiUrl       = 'https://v1.api.isogeo.com'; // Isogeo API Url
var idUrl        = 'https://id.api.isogeo.com'; // Isogeo oAuth Url
var clientId     = '<the oAuth client id goes here>'; // Application oAuth identifier
var clientSecret = '<the oAuth secret id goes here>'; // Application oAuth secret

/*=====  End of Environment variables  ======*/


/**
 * 
 * The script starts here
 * 
 */

console.log('Récupération du token');

// new oAuth library instanciation
var oauth = new OAuth.OAuth2(
    clientId, // clientId
    clientSecret, // clientSecret
    idUrl, // baseSite
    null, // authorizePath (we do not need it)
    '/oauth/token', // accessTokenPath
    { //customHeaders
        'Accept-Language': 'fr' // get API response in french
    } 
);

// thanks oAuth library, it does all the work
oauth.getOAuthAccessToken('', {
    'grant_type': 'client_credentials'
}, function (err, access_token) {

    if (err) {
        return console.log(err);
    }

    if (!access_token) {
        return console.log('access_token is undefined');
    }

    superagent
    .get(apiUrl + '/resources/search')
    .set('Authorization', 'Bearer ' + access_token) // add the Authorization header with access token
    .end(function (err, response) {

        if (err) {
            console.log(err);
        }

        console.log(response.body);
    });

});