import json
from advlabdb import app, user_datastore
from flask import render_template, request, url_for, flash, redirect, session
from flask_security import auth_required, roles_required, hash_password, current_user

from advlabdb.utils import *
from advlabdb.models import *
from advlabdb.forms import *


@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 activeSemesterLabel():
        lastSemesterId = Semester.query.all()[-1].id
        if "activeSemesterId" not in session:
            session["activeSemesterId"] = lastSemesterId
        elif session["activeSemesterId"] != lastSemesterId:
            flash(f"You are in the old semester {Semester.query.get(session['activeSemesterId']).label}!",
                  "warning")
        return Semester.query.get(session["activeSemesterId"]).label

    def navbarItems(title):
        adminPages = ["Students", "Assistants", "Experiments", "Appointments", "Groups", "Users", "Semesters"]
        assistantPages = ["Students", "Assistants", "Experiments", "Appointments", "Groups"]

        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,
                activeSemesterLabel=activeSemesterLabel,
                navbarItems=navbarItems,
                current_user=current_user,
                )


@app.route("/")
def index():
    return render_template("index.html",
                           )


@app.route("/students")
@roles_required("admin")
def students():
    semester = Semester.query.get(session["activeSemesterId"])
    parts = semester.parts
    tables = []
    tablesLabels = []

    headerAndDataList = [["Student number", "row.student.student_number"],
                         ["First name", "row.student.first_name"],
                         ["Last name", "row.student.last_name"],
                         ["Email", "row.student.email"],
                         ["GN", "row.group.number"],
                         ["Bachelor thesis", "row.student.bachelor_thesis"],
                         ["BT WG", "row.student.bachelor_thesis_work_group"],
                         ["Note", "row.student.note"],
                         ["Final part mark", "row.final_part_mark"],
                         ["Experiemt marks", "row.experiment_marks"],
                         ["Parts", "[ps.part for ps in row.student.part_students]"]]

    for part in parts:
        tablesLabels.append("Part " + part.label + ":")
        tables.append(makeTable(headerAndDataList=headerAndDataList,
                                rows=part.part_students))
    title = "Students"
    return render_template(titleToTemplate(title) + ".html",
                           title=title,
                           tables=tables,
                           tablesLabels=tablesLabels,
                           )


@app.route("/assistants")
@roles_required("admin")
def assistants():
    headerAndDataList = [["First name", "row.first_name"],
                         ["Last name", "row.last_name"],
                         ["Email", "row.email"],
                         ["Phone number", "row.phone_number"],
                         ["Mobile phone number", "row.mobile_phone_number"],
                         ["Room", "row.room"],
                         ["Building", "row.building"],
                         ["User", "row.user"],
                         ["Appointments", "row.appointments"],
                         ["Experiemt marks", "row.experiment_marks"]]

    table = makeTable(headerAndDataList=headerAndDataList,
                      rows=Assistant.query.filter(Assistant.user_id != None).all())

    title = "Assistants"
    return render_template(titleToTemplate(title) + ".html",
                           title=title,
                           table=table,
                           )


@app.route("/experiments")
@roles_required("admin")
def experiments():
    semester = Semester.query.get(session["activeSemesterId"])
    parts = semester.parts
    tables = []
    tablesLabels = []

    headerAndDataList = [["Number", "row.experiment.number"],
                         ["Name", "row.experiment.name"],
                         ["Assistants", "row.assistants"],
                         ["Groups with this ex.", "[gEx.group.number for gEx in row.group_experiments]"]]

    for part in parts:
        tablesLabels.append("Part " + part.label + ":")
        tables.append(makeTable(headerAndDataList=headerAndDataList,
                                rows=part.part_experiments))

    title = "Experiments"
    return render_template(titleToTemplate(title) + ".html",
                           title=title,
                           tables=tables,
                           tablesLabels=tablesLabels,
                           )


@app.route("/appointments")
@roles_required("admin")
def appointments():
    title = "Appointments"
    return render_template(titleToTemplate(title) + ".html",
                           title=title,
                           )


@app.route("/groups")
@roles_required("admin")
def groups():
    semester = Semester.query.get(session["activeSemesterId"])
    parts = semester.parts
    tables = []
    tablesLabels = []

    headerAndDataList = [["Number", "row.number"],
                         ["Students",
                          "[ps.student.first_name + ' ' + ps.student.last_name for ps in row.part_students]"],
                         ["Experiments (appointments)",
                          "[str(gx.part_experiment.experiment.number) + ' (' + str([appointmentDate(a.date) for a in gx.appointments]) + ')' for gx in row.group_experiments]"]]

    for part in parts:
        tablesLabels.append("Part " + part.label + ":")
        tables.append(makeTable(headerAndDataList=headerAndDataList,
                                rows=part.groups))

    title = "Groups"
    return render_template(titleToTemplate(title) + ".html",
                           title=title,
                           tables=tables,
                           tablesLabels=tablesLabels,
                           )


@app.route("/users", methods=["GET", "POST"])
@roles_required("admin")
def users():
    if request.method == 'POST':
        if "registerUser" in request.form:
            return redirect(url_for("register"))
    else:
        headerAndDataList = [["Email", "row.email"],
                             ["Roles", "[role.name for role in row.roles]"],
                             ["Assistant", "row.assistant"]]

        table = makeTable(headerAndDataList=headerAndDataList,
                          rows=User.query.filter(User.active == True).all(),
                          tableId="usersTab")

        title = "Users"
        return render_template(titleToTemplate(title) + ".html",
                               title=title,
                               table=table,
                               )


@app.route("/deactivate_users", methods=["GET"])
@roles_required("admin")
def deactivate_users():
    usersJson = json.loads(request.args.get("json"))
    deactivatedUsersEmails = []
    for userJson in usersJson:
        email = userJson["email"]
        user = User.query.filter(User.email == email).first()
        if user == current_user:
            flash("You have tried to deactivate yourself as user!", "danger")
            continue
        if user_datastore.deactivate_user(user):
            deactivatedUsersEmails.append(email)
            db.session.commit()
    if deactivatedUsersEmails == []:
        flash(f"No users deactivated!", "warning")
    else:
        flash(f"Users with emails {deactivatedUsersEmails} deactivated!", "success")
    return redirect(url_for("users"))


@app.route("/semesters")
@roles_required("admin")
def semesters():
    headerAndDataList = [["Label", "row.label"],
                         ["Parts", "row.parts"]]

    table = makeTable(headerAndDataList=headerAndDataList,
                      rows=Semester.query.all())

    title = "Semesters"
    return render_template(titleToTemplate(title) + ".html",
                           title=title,
                           table=table,
                           )


@app.route("/set_semester", methods=["GET"])
@auth_required()
def set_semester():
    session["activeSemesterId"] = int(request.args.get("semester_id"))
    return redirect(request.referrer)


@app.route("/register", methods=["GET", "POST"])
def register():
    form = RegistrationForm()
    if form.validate_on_submit():
        password = randomPassword()
        passwordHash = hash_password(password)

        email = form.email.data.lower()
        admin = form.admin.data

        if admin:
            roles = ["admin"]
            flash("You have registered a new admin!", "danger")
        else:
            roles = ["assistant"]

        user_datastore.create_user(email=email, password=passwordHash, roles=roles)
        db.session.commit()
        return render_template("registered.html",
                               title="Registered",
                               email=email,
                               password=password,
                               admin=admin,
                               )
    return render_template("register.html",
                           title="Register",
                           form=form,
                           )