require('colors').setTheme({
    verbose: 'cyan',
    warn: 'yellow',
    error: 'red',
});

const fs = require("fs");
const path = require("path");
const libxml = require("libxmljs");
const https = require('https');
const archiver = require('archiver');
const execa = require('execa');
const git = require('simple-git/promise')();
const package = require('../package.json');

const infoXmlPath = './appinfo/info.xml';
const isStableRelease = process.argv.indexOf('--stable') > 1;

async function getVersion() {
    return package.version + (!isStableRelease ? '-git.' + (await git.raw(['rev-parse', '--short', 'HEAD'])).trim() : '');
}

run();

async function run() {
    const appId = await prepareInfoXml();
    await createRelease(appId);
}

async function prepareInfoXml() {
    const infoFile = fs.readFileSync(infoXmlPath);
    const xmlDoc = libxml.parseXml(infoFile);

    updateVersion(xmlDoc, await getVersion());
    await validateXml(xmlDoc);

    return xmlDoc.get('//id').text();
}

function updateVersion(xmlDoc, version) {
    let versionChild = xmlDoc.get('//version');
    let currentVersion = versionChild.text();

    if (version !== currentVersion) {
        console.log(`✔ Update version in info.xml to ${version}.`.green);

        versionChild.text(version);

        fs.writeFileSync(infoXmlPath, xmlDoc.toString());
    }
}

async function createRelease(appId) {
    const version = await getVersion();
    console.log(`I'm now building ${appId} in version ${version}.`.verbose);

    await execa('yarn', ['composer:install:dev']);
    console.log(`✔ composer dev dependencies installed`.green);

    await execa('yarn', ['lint']);
    console.log(`✔ linters are happy`.green);

    await execa('yarn', ['composer:install']);
    console.log(`✔ composer dependencies installed`.green);

    await execa('yarn', ['build']);
    console.log(`✔ scripts built`.green);

    let filePath = await createArchive(appId, appId + '-' + version);
    await createNextcloudSignature(appId, filePath);
    await createGPGSignature(filePath);
    await createGPGArmorSignature(filePath);
}


function createArchive(appId, fileBaseName) {
    let fileName = `${fileBaseName}.tar.gz`;
    let filePath = path.normalize(__dirname + `/../archives/${fileName}`);
    let output = fs.createWriteStream(filePath);
    let archive = archiver('tar', {
        gzip: true,
    });

    archive.on('warning', function (err) {
        if (err.code === 'ENOENT') {
            console.warn('Archive warning: '.warn, err);
        } else {
            throw err;
        }
    });

    archive.on('error', function (err) {
        throw err;
    });

    archive.pipe(output);

    function addDirectory(name) {
        archive.directory(name + '/', `${appId}/${name}/`);
    }

    function addFile(name) {
        archive.file(name, {name: `${appId}/${name}`});
    }

    addDirectory('appinfo');
    addDirectory('img');
    addDirectory('js'),
    addDirectory('lib');
    addDirectory('templates');
    addFile('COPYING');
    addFile('README.md')

    archive.glob('vendor/**/*', {
        ignore: ['.git']
    }, {
        prefix: appId
    });

    return new Promise(resolve => {
        output.on('close', function () {
            console.log(`✔ Wrote ${archive.pointer()} bytes to ${fileName}`.green);

            resolve(filePath);
        });

        archive.finalize();
    });
}

function createNextcloudSignature(appId, filePath) {
    const {
        exec
    } = require('child_process');

    return new Promise((resolve, reject) => {
        const sigPath = filePath + '.ncsig';
        exec(`openssl dgst -sha512 -sign ~/.nextcloud/certificates/${appId}.key ${filePath} | openssl base64 > ${sigPath}`, (error, stdout, stderr) => {
            if (error) {
                throw error;
            }

            if (stdout) {
                console.log(`stdout: ${stdout}`);
            }

            if (stderr) {
                console.log(`stderr: ${stderr}`);
            }

            console.log(`✔ created Nextcloud signature: ${path.basename(sigPath)}`.green);

            resolve();
        });
    });
}

function createGPGSignature(filePath) {
    const {
        exec
    } = require('child_process');

    return new Promise((resolve, reject) => {
        exec(`gpg --yes --detach-sign "${filePath}"`, (error, stdout, stderr) => {
            if (error) {
                throw error;
            }

            if (stdout) {
                console.log(`stdout: ${stdout}`);
            }

            if (stderr) {
                console.log(`stderr: ${stderr}`);
            }

            console.log(`✔ created detached signature: ${path.basename(filePath)}.sig`.green);

            resolve();
        });
    });
}

function createGPGArmorSignature(filePath) {
    const {
        exec
    } = require('child_process');

    return new Promise((resolve, reject) => {
        exec(`gpg --yes --detach-sign --armor "${filePath}"`, (error, stdout, stderr) => {
            if (error) {
                throw error;
            }

            if (stdout) {
                console.log(`stdout: ${stdout}`);
            }

            if (stderr) {
                console.log(`stderr: ${stderr}`);
            }

            console.log(`✔ created detached signature: ${path.basename(filePath)}.asc`.green);

            resolve();
        });
    });
}

async function validateXml(xmlDoc) {
    const schemaLocation = xmlDoc.root().attr('noNamespaceSchemaLocation').value();

    if (!schemaLocation) {
        throw "Found no schema location";
    }


    let schemaString;
    try {
        schemaString = await wget(schemaLocation);
    } catch (err) {
        console.log('Could not download schema. Skip validation.'.warn);

        return;
    }
    let xsdDoc = libxml.parseXml(schemaString);

    if (xmlDoc.validate(xsdDoc)) {
        console.log('✔ Document valid'.green);
    } else {
        console.log('✘ Document INVALID'.error);

        xmlDoc.validationErrors.forEach((error, index) => {
            console.log(`#${index + 1}\t${error.toString().trim()}`.warn);
            console.log(`\tLine ${error.line}:${error.column} (level ${error.level})`.verbose);
        });

        throw 'Abort';
    }
}

function wget(url) {
    return new Promise((resolve, reject) => {
        https.get(url, (resp) => {
            let data = '';

            resp.on('data', (chunk) => {
                data += chunk;
            });

            resp.on('end', () => {
                resolve(data);
            });

        }).on("error", (err) => {
            reject(err);
        });
    })
}