const marked = require('marked');
const fs = require('fs');
const _ = require('lodash');

module.exports = function(grunt) {
    require('load-grunt-tasks')(grunt);

    // Project configuration.
    grunt.util.linefeed = '\n';

    grunt.initConfig({
        ngversion: '1.6.1',
        bsversion: '4.1.1',
        modules: [],//to be filled in by build task
        pkg: grunt.file.readJSON('package.json'),
        dist: 'dist',
        filename: 'ui-bootstrap',
        filenamecustom: '<%= filename %>-custom',
        meta: {
            modules: 'angular.module("ui.bootstrap", [<%= srcModules %>]);',
            tplmodules: 'angular.module("ui.bootstrap.tpls", [<%= tplModules %>]);',
            all: 'angular.module("ui.bootstrap", ["ui.bootstrap.tpls", <%= srcModules %>]);',
            cssInclude: '',
            cssFileBanner: '/* Include this file in your html if you are using the CSP mode. */\n\n',
            cssFileDest: '<%= dist %>/<%= filename %>-<%= pkg.version %>-csp.css',
            banner: [
                '/*',
                ' * <%= pkg.name %>',
                ' * <%= pkg.homepage %>\n',
                ' * Version: <%= pkg.version %> - <%= grunt.template.today("yyyy-mm-dd") %>',
                ' * License: <%= pkg.license %>',
                ' */'
            ].join('\n')
        },
        delta: {
            docs: {
                files: ['misc/demo/index.html'],
                tasks: ['after-test']
            },
            html: {
                files: ['template/**/*.html'],
                tasks: ['html2js', 'karma:watch:run']
            },
            js: {
                files: ['src/**/*.js', '!src/**/index.js'],
                tasks: ['karma:watch:run']
            }
        },
        concat: {
            dist: {
                options: {
                    banner: '<%= meta.banner %><%= meta.modules %>\n',
                    footer: '<%= meta.cssInclude %>'
                },
                src: [], //src filled in by build task
                dest: '<%= dist %>/<%= filename %>-<%= pkg.version %>.js'
            },
            dist_tpls: {
                options: {
                    banner: '<%= meta.banner %><%= meta.all %>\n<%= meta.tplmodules %>\n',
                    footer: '<%= meta.cssInclude %>'
                },
                src: [], //src filled in by build task
                dest: '<%= dist %>/<%= filename %>-tpls-<%= pkg.version %>.js'
            }
        },
        copy: {
            demohtml: {
                options: {
                    //process html files with gruntfile config
                    processContent: grunt.template.process
                },
                files: [
                    {
                        expand: true,
                        src: ['**/*.html'],
                        cwd: 'misc/demo/',
                        dest: 'dist/'
                    }
                ]
            },
            demoassets: {
                files: [
                    {
                        expand: true,
                        //Don't re-copy html files, we process those
                        src: ['**/**/*', '!**/*.html'],
                        cwd: 'misc/demo',
                        dest: 'dist/'
                    }
                ]
            },
            docs: {
                files: [
                    {
                        expand: true,
                        src: ['**/*', '*/*'],
                        cwd: 'dist/',
                        dest: 'docs/'
                    }
                ]
            }
        },
        uglify: {
            options: {
                banner: '<%= meta.banner %>'
            },
            dist: {
                src: ['<%= concat.dist.dest %>'],
                dest: '<%= dist %>/<%= filename %>-<%= pkg.version %>.min.js'
            },
            dist_tpls: {
                src: ['<%= concat.dist_tpls.dest %>'],
                dest: '<%= dist %>/<%= filename %>-tpls-<%= pkg.version %>.min.js'
            }
        },
        html2js: {
            dist: {
                options: {
                    module: null, // no bundle module for all the html2js templates
                    base: '.',
                    rename: function(moduleName) {
                        return `uib/${moduleName}`;
                    }
                },
                files: [
                    {
                        expand: true,
                        src: ['template/**/*.html'],
                        ext: '.html.js'
                    }
                ]
            }
        },
        eslint: {
            files: ['Gruntfile.js', 'src/**/*.js']
        },
        karma: {
            options: {
                configFile: 'karma.conf.js'
            },
            watch: {
                background: true
            },
            continuous: {
                singleRun: true
            },
            jenkins: {
                singleRun: true,
                autoWatch: false,
                colors: false,
                reporters: ['dots', 'junit'],
                browsers: ['Chrome', 'ChromeCanary', 'Firefox', 'Opera', '/Users/jenkins/bin/safari.sh']
            },
            travis: {
                singleRun: true,
                autoWatch: false,
                reporters: ['dots'],
                browsers: ['Firefox']
            },
            coverage: {
                preprocessors: {
                    'src/*/*.js': 'coverage'
                },
                reporters: ['progress', 'coverage']
            }
        },
        conventionalChangelog: {
            options: {
                changelogOpts: {
                    preset: 'angular'
                },
                templateFile: 'misc/changelog.tpl.md'
            },
            release: {
                src: 'CHANGELOG.md'
            }
        },
        shell: {
            //We use %version% and evaluate it at run-time, because <%= pkg.version %>
            //is only evaluated once
            'release-prepare': [
                'git add docs'
            ],
            'release-complete': [
                'git commit -a -m "chore(release): v%version%"',
                'git tag v%version%',
                'git push --follow-tags'
            ],
            'publish': [
                'rm -rf dist/*',
                'cp ./docs/ui-bootstrap-%version%.js ./dist/ui-bootstrap.js',
                'cp ./docs/ui-bootstrap-%version%-csp.css ./dist/ui-bootstrap-csp.css',
                'cp ./docs/ui-bootstrap-tpls-%version%.js ./dist/ui-bootstrap-tpls.js',
                'npm publish'
            ]
        },
        'ddescribe-iit': {
            files: [
                'src/**/*.spec.js'
            ]
        }
    });

    //register before and after test tasks so we've don't have to change cli
    //options on the google's CI server
    grunt.registerTask('before-test', [/*'ddescribe-iit',*/ 'eslint', 'html2js']);
    grunt.registerTask('after-test', ['build', 'copy']);

    //Rename our watch task to 'delta', then make actual 'watch'
    //task build things, then start test server
    grunt.renameTask('watch', 'delta');
    grunt.registerTask('watch', ['before-test', 'after-test', 'karma:watch', 'delta']);

    // Default task.
    grunt.registerTask('default', ['before-test', 'test', 'after-test']);

    // Build docs
    grunt.registerTask('docs', ['before-test', 'after-test', 'copy:docs']);

    //Common ui.bootstrap module containing all modules for src and templates
    //findModule: Adds a given module to config
    const foundModules = {};

    function findModule(name)
    {
        if(foundModules[name])
        { return; }
        foundModules[name] = true;

        function breakup(text, separator)
        {
            return text.replace(/[A-Z]/g, function(match) {
                return separator + match;
            });
        }

        function ucwords(text)
        {
            return text.replace(/^([a-z])|\s+([a-z])/g, function($1) {
                return $1.toUpperCase();
            });
        }

        function enquote(str)
        {
            return `"${str}"`;
        }

        function enquoteUibDir(str)
        {
            return enquote(`uib/${str}`);
        }

        const module = {
            name: name,
            moduleName: enquote(`ui.bootstrap.${name}`),
            displayName: ucwords(breakup(name, ' ')),
            srcFiles: grunt.file.expand([`src/${name}/*.js`, `!src/${name}/index.js`, `!src/${name}/index-nocss.js`]),
            cssFiles: grunt.file.expand(`src/${name}/*.css`),
            tplFiles: grunt.file.expand(`template/${name}/*.html`),
            tpljsFiles: grunt.file.expand(`template/${name}/*.html.js`),
            tplModules: grunt.file.expand(`template/${name}/*.html`).map(enquoteUibDir),
            dependencies: dependenciesForModule(name),
            docs: {
                md: grunt.file.expand(`src/${name}/docs/*.md`)
                    .map(grunt.file.read).map((str) => marked(str)).join('\n'),
                js: grunt.file.expand(`src/${name}/docs/*.js`)
                    .map(grunt.file.read).join('\n'),
                html: grunt.file.expand(`src/${name}/docs/*.html`)
                    .map(grunt.file.read).join('\n')
            }
        };

        const styles = {
            css: [],
            js: []
        };
        module.cssFiles.forEach(processCSS.bind(null, module.name, styles, true));
        if(styles.css.length)
        {
            module.css = styles.css.join('\n');
            module.cssJs = styles.js.join('\n');
        }

        module.dependencies.forEach(findModule);
        grunt.config('modules', grunt.config('modules').concat(module));
    }

    function dependenciesForModule(name)
    {
        let deps = [];
        grunt.file.expand([`src/${name}/*.js`, `!src/${name}/index.js`, `!src/${name}/index-nocss.js`])
            .map(grunt.file.read)
            .forEach(function(contents) {
                //Strategy: find where module is declared,
                //and from there get everything inside the [] and split them by comma
                const moduleDeclIndex = contents.indexOf('angular.module(');
                const depArrayStart = contents.indexOf('[', moduleDeclIndex);
                const depArrayEnd = contents.indexOf(']', depArrayStart);
                const dependencies = contents.substring(depArrayStart + 1, depArrayEnd);
                dependencies.split(',').forEach(function(dep) {
                    if(dep.indexOf('ui.bootstrap.') > -1)
                    {
                        const depName = dep.trim().replace('ui.bootstrap.', '').replace(/['"]/g, '');
                        if(deps.indexOf(depName) < 0)
                        {
                            deps.push(depName);
                            //Get dependencies for this new dependency
                            deps = deps.concat(dependenciesForModule(depName));
                        }
                    }
                });
            });
        return deps;
    }

    grunt.registerTask('dist', 'Override dist directory', function() {
        const dir = this.args[0];
        if(dir)
        { grunt.config('dist', dir); }
    });

    grunt.registerTask('build', 'Create bootstrap build files', function() {
        const _ = grunt.util._;

        //If arguments define what modules to build, build those. Else, everything
        if(this.args.length)
        {
            this.args.forEach(findModule);
            grunt.config('filename', grunt.config('filenamecustom'));
        }
        else
        {
            grunt.file.expand({
                filter: 'isDirectory', cwd: '.'
            }, 'src/*').forEach((dir) => {
                findModule(dir.split('/')[1]);
            });
        }

        const modules = grunt.config('modules');
        grunt.config('srcModules', _.pluck(modules, 'moduleName'));
        grunt.config('tplModules', _.pluck(modules, 'tplModules').filter((tpls) => tpls.length > 0));
        grunt.config('demoModules', modules
            .filter((module) => module.docs.md && module.docs.js && module.docs.html)
            .sort((a, b) => {
                if(a.name < b.name)
                { return -1; }
                if(a.name > b.name)
                { return 1; }
                return 0;
            })
        );

        const cssStrings = _.flatten(_.compact(_.pluck(modules, 'css')));
        const cssJsStrings = _.flatten(_.compact(_.pluck(modules, 'cssJs')));
        if(cssStrings.length)
        {
            grunt.config('meta.cssInclude', cssJsStrings.join('\n'));

            grunt.file.write(grunt.config('meta.cssFileDest'), grunt.config('meta.cssFileBanner') +
                cssStrings.join('\n'));

            grunt.log.writeln('File ' + grunt.config('meta.cssFileDest') + ' created');
        }

        const moduleFileMapping = _.clone(modules, true);
        moduleFileMapping.forEach((module) => delete module.docs);

        grunt.config('moduleFileMapping', moduleFileMapping);

        const srcFiles = _.pluck(modules, 'srcFiles');
        const tpljsFiles = _.pluck(modules, 'tpljsFiles');
        //Set the concat task to concatenate the given src modules
        grunt.config('concat.dist.src', grunt.config('concat.dist.src')
            .concat(srcFiles));
        //Set the concat-with-templates task to concat the given src & tpl modules
        grunt.config('concat.dist_tpls.src', grunt.config('concat.dist_tpls.src')
            .concat(srcFiles).concat(tpljsFiles));

        grunt.task.run(['concat', 'uglify', 'makeModuleMappingFile', 'makeRawFilesJs', 'makeVersionsMappingFile']);
    });

    grunt.registerTask('test', 'Run tests on singleRun karma server', function() {
        //this task can be executed in 3 different environments: local, Travis-CI and Jenkins-CI
        //we need to take settings for each one into account
        if(process.env.TRAVIS)
        {
            grunt.task.run('karma:travis');
        }
        else
        {
            const isToRunJenkinsTask = !!this.args.length;
            if(grunt.option('coverage'))
            {
                const karmaOptions = grunt.config.get('karma.options'),
                    coverageOpts = grunt.config.get('karma.coverage');
                grunt.util._.extend(karmaOptions, coverageOpts);
                grunt.config.set('karma.options', karmaOptions);
            }
            grunt.task.run(this.args.length ? 'karma:jenkins' : 'karma:continuous');
        }
    });

    grunt.registerTask('makeModuleMappingFile', function() {
        const _ = grunt.util._;
        const moduleMappingJs = 'dist/assets/module-mapping.json';
        const moduleMappings = grunt.config('moduleFileMapping');
        const moduleMappingsMap = _.object(_.pluck(moduleMappings, 'name'), moduleMappings);
        const jsContent = JSON.stringify(moduleMappingsMap);
        grunt.file.write(moduleMappingJs, jsContent);
        grunt.log.writeln('File ' + moduleMappingJs.cyan + ' created.');
    });

    grunt.registerTask('makeRawFilesJs', function() {
        const _ = grunt.util._;
        const jsFilename = 'dist/assets/raw-files.json';
        const genRawFilesJs = require('./misc/raw-files-generator');

        genRawFilesJs(grunt, jsFilename, _.flatten(grunt.config('concat.dist_tpls.src')),
            grunt.config('meta.banner'), grunt.config('meta.cssFileBanner')
        );
    });

    grunt.registerTask('makeVersionsMappingFile', function() {
        const done = this.async();

        const exec = require('child_process').exec;

        grunt.log.writeln(`Mapping file skipped till someone wants to fix.`);

        return;

//         const versionsMappingFile = 'dist/versions-mapping.json';

//         exec('git tag --sort -version:refname', function(error, stdout, stderr) {
//             // Let's remove the oldest 56 versions.
//             const versions = stdout.split('\n').slice(0, -56);
//             let jsContent = versions.map(function(version) {
//                 version = version.replace(/^v/, '');
//                 return {
//                     version: version,
//                     url: `/ui-bootstrap4/versioned-docs/${version}/index.html`
//                 };
//             });
//             jsContent = _.sortBy(jsContent, 'version').reverse();
//             jsContent.unshift({
//                 version: 'Current',
//                 url: '/ui-bootstrap4/index.html'
//             });
//             grunt.file.write(versionsMappingFile, JSON.stringify(jsContent));
//             grunt.log.writeln(`File ${versionsMappingFile.cyan} created.`);
//             done();
//         });

    });

    /**
     * Logic from AngularJS
     * https://github.com/angular/angular.js/blob/36831eccd1da37c089f2141a2c073a6db69f3e1d/lib/grunt/utils.js#L121-L145
     */
    function processCSS(moduleName, state, minify, file)
    {
        let css = fs.readFileSync(file).toString(),
            js;
        state.css.push(css);

        if(minify)
        {
            css = css
                .replace(/\r?\n/g, '')
                .replace(/\/\*.*?\*\//g, '')
                .replace(/:\s+/g, ':')
                .replace(/\s*\{\s*/g, '{')
                .replace(/\s*\}\s*/g, '}')
                .replace(/\s*\,\s*/g, ',')
                .replace(/\s*\;\s*/g, ';');
        }
        //escape for js
        css = css
            .replace(/\\/g, '\\\\')
            .replace(/'/g, "\\'")
            .replace(/\r?\n/g, '\\n');
        js = `angular.module('ui.bootstrap.${moduleName}').run(function() {!angular.$$csp().noInlineStyle && !angular.$$uib${_.capitalize(
            moduleName)}Css && angular.element(document).find('head').prepend('<style type="text/css">${css}</style>'); angular.$$uib${_.capitalize(
            moduleName)}Css = true; });`;
        state.js.push(js);

        return state;
    }

    function setVersion(type, suffix)
    {
        const file = 'package.json';
        const VERSION_REGEX = /([\'|\"]version[\'|\"][ ]*:[ ]*[\'|\"])([\d|.]*)(-\w+)*([\'|\"])/;
        let contents = grunt.file.read(file);
        let version;
        contents = contents.replace(VERSION_REGEX, function(match, left, center) {
            version = center;
            if(type)
            {
                version = require('semver').inc(version, type);
            }
            //semver.inc strips our suffix if it existed
            if(suffix)
            {
                version += '-' + suffix;
            }
            return left + version + '"';
        });
        grunt.log.ok('Version set to ' + version.cyan);
        grunt.file.write(file, contents);
        return version;
    }

    grunt.registerTask('version', 'Set version. If no arguments, it just takes off suffix', function() {
        setVersion(this.args[0], this.args[1]);
    });

    grunt.registerMultiTask('shell', 'run shell commands', function() {
        const self = this;
        const sh = require('shelljs');
        self.data.forEach(function(cmd) {
            cmd = cmd.replace('%version%', grunt.file.readJSON('package.json').version);
            grunt.log.ok(cmd);
            const result = sh.exec(cmd, { silent: true });
            if(result.code !== 0)
            {
                grunt.fatal(result.output);
            }
        });
    });

    //------------------------------------------------------------------------------------------------------------------
    // New Release System
    //------------------------------------------------------------------------------------------------------------------

    grunt.registerTask('release', function(version) {
        // Step 1, we change package.json
        grunt.config.set('pkg.version', version);
        grunt.file.write('./package.json', JSON.stringify(grunt.config('pkg'), null, 2));

        // Step 2, we queue up additional tasks
        grunt.task.run([
            'conventionalChangelog',
            'html2js',
            'build',
            'copy',
            'shell:release-prepare',
            'shell:release-complete',
            'shell:publish'
        ]);
    });

    //------------------------------------------------------------------------------------------------------------------

    return grunt;
};