from flask import redirect, render_template, request, url_for, flash
from flask_security import auth_required, current_user

from advlabdb import app
from advlabdb.models import Semester
from advlabdb.utils import setUserActiveSemester, titleToTemplate, userActiveSemester


@app.context_processor
def util_processor():
    def semesterDropDownItems():
        semesters = Semester.query.all()
        items = []
        for semester in semesters:
            items.append(
                '<li><a class="dropdown-item" href="'
                + url_for("set_semester")
                + "?semester_id="
                + str(semester.id)
                + '">'
                + semester.label
                + "</a></li>"
            )
        return items

    def navbarItems(title):
        adminPages = []
        assistantPages = []

        if current_user.is_authenticated:
            roleNames = [role.name for role in current_user.roles]
            if "assistant" in roleNames:
                pages = assistantPages
                if "admin" in roleNames:
                    for p in adminPages:
                        if p not in pages:
                            pages.append(p)
            elif "admin" in roleNames:
                pages = adminPages

            pages.append("Logout")
        else:
            pages = ["Login"]

        items = []
        for page in pages:
            if page == title:
                active = " active"
            else:
                active = ""

            items.append('<a class="nav-link' + active + '" href="' + titleToTemplate(page) + '">' + page + "</a>")
        return items

    return dict(
        semesterDropDownItems=semesterDropDownItems,
        userActiveSemester=userActiveSemester,
        navbarItems=navbarItems,
        current_user=current_user,
    )


@app.route("/")
def index():
    if current_user.has_role("admin"):
        return redirect(url_for("index") + "admin")
    elif current_user.has_role("assistant"):
        return redirect(url_for("index") + "assistant")
    else:
        return render_template("index.html")


@app.route("/set_semester")
@auth_required()
def set_semester():
    try:
        semesterId = int(request.args.get("semester_id"))
    except Exception as ex:
        flash(str(ex), "error")
    else:
        setUserActiveSemester(semesterId)

    red = request.referrer or url_for("index")
    return redirect(red)