define(['assert'], function(assert) {
    'use strict';
    // types: bc (bachelor college), major (default), bep
    // (assumption: every course is 5 ECTS and one must do 15 ECTS in a
    // quartile, filling it up with Electives)
    // for new courses without code, use "DS..."
    var courses = [
        // Bachelor college core courses
        { "id": "2WAB0", "name": "Calculus",   "type": "bc", "when": "Y1Q1" },
        { "id": "3NAB0", "name": "Physics",    "type": "bc", "when": "Y1Q2" },
        { "id": "0LEB0", "name": "Modelling",  "type": "bc", "when": "Y1Q3" },
        { "id": "0SAB0", "name": "USE Basics", "type": "bc", "when": "Y1Q4" },
        { "id": "7NXB0", "name": "Design",     "type": "bc", "when": "Y2Q1" },
        // Data Science basic courses
        { "id": "2IP90", "name": "Programming",             "when": "Y1Q1" },
        { "id": "DS001", "name": "Introduction to Data Science",    "when": "Y1Q1" },
        { "id": "2IT60", "name": "Logic and Set Theory",    "when": "Y1Q2" },
        { "id": "2IO80", "name": "DBL Hypermedia",          "when": "Y1Q3" },
        { "id": "2IC60", "name": "Computer networks and security",  "when": "Y1Q4" },
        { "id": "2ID40", "name": "Human Technology Interaction",    "when": "Y1Q4" },
        { "id": "2WF20", "name": "Linear Algebra",          "when": "Y2Q1" },
        { "id": "2IV60", "name": "Computer Graphics",       "when": "Y2Q3" },
        // Advanced courses
        { "id": "2ID50", "name": "Datamodelling and Databases", "when": "Y2Q2" },
        { "id": "2ID60", "name": "Web Technology",              "when": "Y2Q2" },
        { "id": "DS002", "name": "Workflow",                    "when": "Y2Q3" },
        { "id": "2IL50", "name": "Data Structures",             "when": "Y2Q3" },
        { "id": "2IOC0", "name": "DBL Information Systems",     "when": "Y2Q4" },
        { "id": "2DI90", "name": "Probability and Statistics",  "when": "Y2Q4" },
        { "id": "DS003", "name": "Data Visualization",          "when": "Y3Q1" },
        { "id": "2IIC0", "name": "Business Information Systems","when": "Y3Q1" },
        { "id": "2IID0", "name": "Web Analytics",               "when": "Y3Q2" },
        { "id": "2IO90", "name": "DBL Algorithms",              "when": "Y3Q2" },
    ];

    function getQuartile(when) {
        var y_q = /^Y([1-3])Q([1-4])$/.exec(when);
        assert(y_q, "Invalid when: " + when);
        var y_i = y_q[1] - 1, q_i = y_q[2] - 1;
        return schedule[y_i][q_i];
    }

    var coursesById = {};

    // 2d array from years to quartiles to courses
    var schedule = [];
    // make an empty schedule
    var years = 3, quartiles = 4;
    for (var i = 0; i < years; i++) {
        schedule[i] = [];
        for (var j = 0; j < quartiles; j++) {
            schedule[i][j] = [];
        }
    }

    // find all courses by ID and fill the schedule
    courses.forEach(function(course) {
        assert (!(course.id in coursesById),
            "Course is already known: " + course.id);
        coursesById[course.id] = course;
        getQuartile(course.when).push(course);
    });

    return {
        "courses": courses,
        "schedule": schedule
    };
});
/*
Packages:
Programming - Linear Algebra - Computer Graphics - Data Visualisation
Programming - Human Technology Interaction - Web Technology - Web Analytics
Programming - Data Structures - DBL Algorithms

Electives and USE:
Year 1 - 2x Elective
Year 2 - 3x Elective/USE
Year 3 - 6x Elective/USE
*/