/**
 * Creates the correct directory structure and a config file in the user's drive;
 */
function setupDrive(email, name) {
    // TODO create CSR folder and config file inside
    createFolder('CSR');
    uploadConfig(email, name);
    checkAuth();
}

/**
 * Creates a folder with the given name in the drive;
 */
function createFolder(dirName) {
    var metadata = {
        'name' : dirName,
        'mimeType' : 'application/vnd.google-apps.folder'
    };

    var request = gapi.client.request({
        'path': '/drive/v3/files',
        'method': 'POST',
        'body': JSON.stringify(metadata)});
    request.execute();
}

/**
 * Uploads a config file to the CSR folder with the given email and name;
 */
function uploadConfig(email, name) {
    var request = gapi.client.request({
        'path': '/drive/v3/files',
        'method': 'GET',
        'q': 'name="CSR", trashed="false", mimeType="application/vnd.google-apps.folder"',
        'fields': "nextPageToken, files(id, name)"
    });

    request.execute(function (results) {
        var files = results.files;
        var csrID = '';
        if (files && files.length > 0) {
            csrID = files[0].id;
        }
        uploadFile('config', email + 'n' + name, 'plain', csrID);
    });
}

/**
 * Uploads either a plain text file or a CSV file to the user's Google Drive in the CSR folder;
 */
function uploadFile(fileName, fileContent, mimeType, parentID) {
    console.log(parentID); //check that a parentID is being passed in
    var auth_token = gapi.auth.getToken().access_token;

    var metaType = '';
    var bodyType = '';
    if (mimeType == 'csv') {
        metaType = 'application/vnd.google-apps.spreadsheet';
        bodyType = 'text/csvrnrn';
    } else if (mimeType == 'plain') {
        metaType = 'text/plainrnrn';
        bodyType = 'text/plainrnrn';
    }

    const boundary = '-------314159265358979323846';
    const delimiter = "rn--" + boundary + "rn";
    const close_delim = "rn--" + boundary + "--";

    var metadata = {
        'name': fileName,
        'mimeType': metaType,
        'parents':[{'id': parentID}]
    };

    var multipartRequestBody =
        delimiter +  'Content-Type: application/jsonrnrn' +
        JSON.stringify(metadata) +
        delimiter + 'Content-Type: ' + bodyType +
        fileContent +
        close_delim;

    var request = gapi.client.request({
        'path': '/upload/drive/v3/files',
        'method': 'POST',
        'params': {'uploadType': 'multipart'},
        'headers': { 'Content-Type': 'multipart/form-data; boundary="' + boundary + '"', 'Authorization': 'Bearer ' + auth_token, },
        'body': multipartRequestBody
    })

    request.execute(function (file) {
        console.log("Wrote to file " + file.name + " id: " + file.id);
        });
}

function createFile(){
const boundary = '-------314159265358979323846';
const delimiter = "rn--" + boundary + "rn";
const close_delim = "rn--" + boundary + "--";

var fileContent = 'It works :)';

var metadata = {
    'name': 'myFile',
    'mimeType': 'text/plainrnrn'
};

var multipartRequestBody = delimiter +  'Content-Type: application/jsonrnrn' + JSON.stringify(metadata) + delimiter + 'Content-Type: ' + 'text/plainrnrn' + fileContent + close_delim;

gapi.client.request({
    'path': '/upload/drive/v3/files',
    'method': 'POST',
    'params': {
        'uploadType': 'multipart'
    },
    'headers': {
        'Content-Type': 'multipart/related; boundary="' + boundary + '"'
    },
    'body': multipartRequestBody
}).then(function(response){
    console.log(response);
});
}