var gulp = require('gulp'),
    wiredep = require('wiredep').stream,
    eventStream = require('event-stream'),
    gulpLoadPlugins = require('gulp-load-plugins'),
    fs = require('fs'),
    path = require('path'),
    url = require('url'),
    uri = require('urijs'),
    urljoin = require('url-join'),
    s = require('underscore.string'),
    stringifyObject = require('stringify-object'),
    hawtio = require('hawtio-node-backend'),
    argv = require('yargs').argv,
    del = require('del');

var plugins = gulpLoadPlugins({});
var pkg = require('./package.json');

var config = {
    main: '.',
    ts: ['plugins/**/*.ts'],
    less: ['plugins/**/*.less'],
    templates: ['plugins/**/*.html'],
    templateModule: pkg.name + '-templates',
    dist: argv.out || './dist/',
    js: pkg.name + '.js',
    css: pkg.name + '.css',
    tsProject: plugins.typescript.createProject({
        target: 'ES5',
        module: 'commonjs',
        declarationFiles: true,
        noExternalResolve: false
    })
};

gulp.task('bower', function() {
    return gulp.src('index.html')
        .pipe(wiredep({}))
        .pipe(gulp.dest('.'));
});

/** Adjust the reference path of any typescript-built plugin this project depends on */
gulp.task('path-adjust', function() {
    return gulp.src('libs/**/includes.d.ts')
        .pipe(plugins.replace(/"\.\.\/libs/gm, '"../../../libs'))
        .pipe(gulp.dest('libs'));
});

gulp.task('clean-defs', function() {
    return del('defs.d.ts');
});

gulp.task('tsc', ['clean-defs'], function() {
    var cwd = process.cwd();
    var tsResult = gulp.src(config.ts)
        .pipe(plugins.sourcemaps.init())
        .pipe(plugins.typescript(config.tsProject))
        .on('error', plugins.notify.onError({
            onLast: true,
            message: '<%= error.message %>',
            title: 'Typescript compilation error'
        }));

    return eventStream.merge(
            tsResult.js
            .pipe(plugins.concat('compiled.js'))
            .pipe(plugins.sourcemaps.write())
            .pipe(gulp.dest('.')),
            tsResult.dts
            .pipe(gulp.dest('d.ts')))
        .pipe(plugins.filter('**/*.d.ts'))
        .pipe(plugins.concatFilenames('defs.d.ts', {
            root: cwd,
            prepend: '/// <reference path="',
            append: '"/>'
        }))
        .pipe(gulp.dest('.'));
});

gulp.task('less', function() {
    return gulp.src(config.less)
        .pipe(plugins.less({
            paths: [path.join(__dirname, 'less', 'includes')]
        }))
        .on('error', plugins.notify.onError({
            onLast: true,
            message: '<%= error.message %>',
            title: 'less file compilation error'
        }))
        .pipe(plugins.concat(config.css))
        .pipe(gulp.dest(config.dist));
});

gulp.task('template', ['tsc'], function() {
    return gulp.src(config.templates)
        .pipe(plugins.angularTemplatecache({
            filename: 'templates.js',
            root: 'plugins/',
            standalone: true,
            module: config.templateModule,
            templateFooter: '}]); hawtioPluginLoader.addModule("' + config.templateModule + '");'
        }))
        .pipe(gulp.dest('.'));
});

gulp.task('concat', ['template'], function() {
    return gulp.src(['compiled.js', 'templates.js'])
        .pipe(plugins.concat(config.js))
        .pipe(plugins.ngAnnotate())
        .pipe(gulp.dest(config.dist));
});

gulp.task('clean', ['concat'], function() {
    return del(['templates.js', 'compiled.js', './site/']);
});

gulp.task('watch-less', function() {
    plugins.watch(config.less, function() {
        gulp.start('less');
    });
});

gulp.task('watch', ['build', 'watch-less'], function() {
    plugins.watch(['libs/**/*.js', 'libs/**/*.css', 'index.html', config.dist + '/*'], function() {
        gulp.start('reload');
    });
    plugins.watch(['libs/**/*.d.ts', config.ts, config.templates], function() {
        gulp.start(['tsc', 'template', 'concat', 'clean']);
    });
});

gulp.task('connect', ['watch'], function() {
    // lets disable unauthorised TLS issues with kube REST API
    process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";

    var kubeBase = process.env.KUBERNETES_MASTER || 'https://localhost:8443';
    console.log("==== using KUBERNETES URL: " + kubeBase);
    var kube = uri(urljoin(kubeBase, 'api'));
    var kubeapis = uri(urljoin(kubeBase, 'apis'));
    var oapi = uri(urljoin(kubeBase, 'oapi'));
    console.log("Connecting to Kubernetes on: " + kube);

    var staticAssets = [{
        path: '/',
        dir: '.'
    }];

    var dirs = fs.readdirSync('./libs');
    dirs.forEach(function(dir) {
        var dir = './libs/' + dir;
        console.log("dir: ", dir);
        if (fs.statSync(dir).isDirectory()) {
            console.log("Adding directory to search path: ", dir);
            staticAssets.push({
                path: '/',
                dir: dir
            });
        }
    });

    var localProxies = [];
    if (process.env.LOCAL_APP_LIBRARY === "true") {
        localProxies.push({
            proto: "http",
            port: "8588",
            hostname: "localhost",
            path: '/api/v1/proxy/namespaces/default/services/app-library',
            targetPath: "/"
        });
        console.log("because of $LOCAL_APP_LIBRARY being true we are using a local proxy for /api/v1/proxy/namespaces/default/services/app-library");
    }
    if (process.env.LOCAL_FABRIC8_FORGE === "true") {
        localProxies.push({
            proto: "http",
            port: "8080",
            hostname: "localhost",
            path: '/api/v1/proxy/namespaces/default/services/fabric8-forge',
            targetPath: "/"
        });
        console.log("because of LOCAL_FABRIC8_FORGE being true we are using a local proxy for /api/v1/proxy/namespaces/default/services/fabric8-forge");
    }
    if (process.env.LOCAL_GOGS_HOST) {
        var gogsPort = process.env.LOCAL_GOGS_PORT || "3000";
        //var gogsHostName = process.env.LOCAL_GOGS_HOST + ":" + gogsPort;
        var gogsHostName = process.env.LOCAL_GOGS_HOST;
        console.log("Using gogs host: " + gogsHostName);
        localProxies.push({
            proto: "http",
            port: gogsPort,
            hostname: gogsHostName,
            path: '/kubernetes/api/v1/proxy/services/gogs-http-service',
            targetPath: "/"
        });
        console.log("because of LOCAL_GOGS_HOST being set we are using a local proxy for /kubernetes/api/v1/proxy/services/gogs-http-service to point to http://" + process.env.LOCAL_GOGS_HOST + ":" + gogsPort);
    }
    if (process.env.LOCAL_JENKINSHIFT) {
        var jenkinshiftPort = process.env.LOCAL_JENKINSHIFT_PORT || "9090";
        var jenkinshiftHost = process.env.LOCAL_JENKINSHIFT;
        console.log("Using jenkinshift host: " + jenkinshiftHost);
        var proxyPath = '/api/v1/proxy/namespaces/default/services/templates/oapi/v1';
        console.log("Using jenkinshift host: " + jenkinshiftHost);
        localProxies.push({
            proto: "http",
            port: jenkinshiftPort,
            hostname: jenkinshiftHost,
            path: proxyPath,
            targetPath: "/oapi/v1"
        });
        localProxies.push({
            proto: "http",
            port: jenkinshiftPort,
            hostname: jenkinshiftHost,
            path: "/oapi/v1",
            targetPath: "/oapi/v1"
        });
        console.log("because of LOCAL_JENKINSHIFT being set we are using a local proxy for " + proxyPath + " to point to http://" + jenkinshiftHost + ":" + jenkinshiftPort);
    }

    var defaultProxies = [{
        proto: kube.protocol(),
        port: kube.port(),
        hostname: kube.hostname(),
        path: '/kubernetes/api',
        targetPath: kube.path()
    }, {
        proto: kubeapis.protocol(),
        port: kubeapis.port(),
        hostname: kubeapis.hostname(),
        path: '/apis',
        targetPath: kubeapis.path()
    }, {
        proto: oapi.protocol(),
        port: oapi.port(),
        hostname: oapi.hostname(),
        path: '/kubernetes/oapi',
        targetPath: oapi.path()
    }, {
        proto: kube.protocol(),
        hostname: kube.hostname(),
        port: kube.port(),
        path: '/jolokia',
        targetPath: '/hawtio/jolokia'
    }, {
        proto: kube.protocol(),
        hostname: kube.hostname(),
        port: kube.port(),
        path: '/git',
        targetPath: '/hawtio/git'
    }, {
        proto: "http",
        port: "8088",
        hostname: "192.168.0.110",
        path: '/java/console/api',
        targetPath: "/"
    }];

    var staticProxies = localProxies.concat(defaultProxies);

    hawtio.setConfig({
        port: process.env.DEV_PORT || 9000,
        staticProxies: staticProxies,
        staticAssets: staticAssets,
        fallback: 'index.html',
        liveReload: {
            enabled: true
        }
    });
    var debugLoggingOfProxy = process.env.DEBUG_PROXY === "true";
    var useAuthentication = process.env.DISABLE_OAUTH !== "true";

    var googleClientId = process.env.GOOGLE_OAUTH_CLIENT_ID;
    var googleClientSecret = process.env.GOOGLE_OAUTH_CLIENT_SECRET;

    hawtio.use('/osconsole/config.js', function(req, res, next) {
        var config = {
            api: {
                openshift: {
                    proto: oapi.protocol(),
                    hostPort: oapi.host(),
                    prefix: oapi.path()
                },
                k8s: {
                    proto: kube.protocol(),
                    hostPort: kube.host(),
                    prefix: kube.path()
                }
            }
        };
        if (googleClientId && googleClientSecret) {
            config.master_uri = kubeBase;
            config.google = {
                clientId: googleClientId,
                clientSecret: googleClientSecret,
                authenticationURI: "https://accounts.google.com/o/oauth2/auth",
                authorizationURI: "https://accounts.google.com/o/oauth2/auth",
                scope: "profile",
                redirectURI: "http://localhost:9000"
            };

        } else if (useAuthentication) {
            config.master_uri = kubeBase;
            config.openshift = {
                oauth_authorize_uri: urljoin(kubeBase, '/oauth/authorize'),
                oauth_client_id: 'fabric8'
            };
        }
        var answer = "window.OPENSHIFT_CONFIG = window.HAWTIO_OAUTH_CONFIG = " + stringifyObject(config);
        res.set('Content-Type', 'application/javascript');
        res.send(answer);
    });

    hawtio.use('/', function(req, res, next) {
        var path = req.originalUrl;
        // avoid returning these files, they should get pulled from js
        if (s.startsWith(path, '/plugins/') && s.endsWith(path, 'html')) {
            console.log("returning 404 for: ", path);
            res.statusCode = 404;
            res.end();
        } else {
            if (debugLoggingOfProxy) {
                console.log("allowing: ", path);
            }
            next();
        }
    });
    hawtio.listen(function(server) {
        var host = server.address().address;
        var port = server.address().port;
        console.log("started from gulp file at ", host, ":", port);
    });
});

gulp.task('reload', function() {
    gulp.src('.')
        .pipe(hawtio.reload());
});

gulp.task('build', ['bower', 'path-adjust', 'tsc', 'less', 'template', 'concat', 'clean']);

gulp.task('site', ['clean', 'build'], function() {
    gulp.src(['index.html', 'osconsole/config.js.tmpl', 'css/**', 'images/**', 'img/**', 'libs/**', 'dist/**'], { base: '.' }).pipe(gulp.dest('site'));

    var dirs = fs.readdirSync('./libs');
    dirs.forEach(function(dir) {
        var path = './libs/' + dir + "/img";
        try {
            if (fs.statSync(path).isDirectory()) {
                console.log("found image dir: " + path);
                var pattern = 'libs/' + dir + "/img/**";
                gulp.src([pattern]).pipe(gulp.dest('site/img'));
            }
        } catch (e) {
            // ignore, file does not exist
        }
    });
});

gulp.task('default', ['connect']);