'use strict';

var fs = require('fs'),
    path = require('path');

function findAmberPath(options) {
    var result;
    options.some(function (x) {
        var candidate = path.join(__dirname, x);
        return fs.existsSync(path.join(candidate, 'support/boot.js')) && (result = candidate);
    });
    return result;
}

module.exports = function (grunt) {
    var path = require('path');

    // These plugins provide necessary tasks.
    grunt.loadNpmTasks('grunt-execute');
    grunt.loadNpmTasks('grunt-contrib-clean');
    grunt.loadNpmTasks('grunt-contrib-less');
    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('amber-dev');

    // Default task.
    grunt.registerTask('default', ['less', 'amberc:all']);
    grunt.registerTask('test', ['amberc:test_runner', 'execute:test_runner', 'clean:test_runner']);
    grunt.registerTask('devel', ['amdconfig:helios']);

    // Project configuration.
    grunt.initConfig({
        // Metadata.
        // pkg: grunt.file.readJSON(''),
        banner: '/*! <%= pkg.title || pkg.name %> - v<%= pkg.version %> - ' +
        '<%= grunt.template.today("yyyy-mm-dd") %>\n' +
        '<%= pkg.homepage ? "* " + pkg.homepage + "\\n" : "" %>' +
        '* Copyright (c) <%= grunt.template.today("yyyy") %> <%= pkg.author.name %>;' +
        ' Licensed <%= _.pluck(pkg.licenses, "type").join(", ") %> */\n',
        // task configuration
        less: {
            development: {
                files: {
                    'resources/helios.css': 'resources/helios.less'
                }
            }
        },

        amberc: {
            options: {
                amber_dir: findAmberPath(['../..', 'bower_components/amber']),
                library_dirs: ['src', 'bower_components/amber-contrib-web/src']
            },
            all: {
                output_dir: 'src',
                src: [
                    // list all sources in dependency order
                    'src/Helios-Core.st', 'src/Helios-Exceptions.st', 'src/Helios-Announcements.st',
                    'src/Helios-KeyBindings.st', 'src/Helios-Layout.st', 'src/Helios-Helpers.st',
                    'src/Helios-Commands-Core.st',
                    'src/Helios-Commands-Tools.st', 'src/Helios-Commands-Browser.st', 'src/Helios-Commands-SUnit.st',
                    'src/Helios-References.st', 'src/Helios-Inspector.st', 'src/Helios-Browser.st',
                    'src/Helios-Transcript.st', 'src/Helios-Workspace.st', 'src/Helios-Debugger.st',
                    'src/Helios-SUnit.st',
                    // list all tests in dependency order
                    'src/Helios-Browser-Tests.st', 'src/Helios-Workspace-Tests.st', 'src/Helios-SUnit-Tests.st'
                ],
                libraries: ['Web', 'SUnit'],
                amd_namespace: 'helios',
                jsGlobals: ['navigator']
            },
            test_runner: {
                src: ['node_modules/amber-dev/lib/Test.st'],
                libraries: [
                    /* add dependencies packages here */
                    /* add other code-to-test packages here */
                    'SUnit',
                    /* add other test packages here */
                ],
                main_class: 'NodeTestRunner',
                output_name: 'test_runner'
            }
        },

        amdconfig: {helios: {dest: 'config.js'}},

        execute: {
            test_runner: {
                src: ['test_runner.js']
            }
        },

        clean: {
            test_runner: ['test_runner.js']
        },

        watch: {
            less: {
                files: ['resources/*.less'],
                tasks: ['less'],
                options: {
                    spawn: false
                }
            }
        }
    });

};