import os
import zipfile
from flask_login import current_user
from flask import (
    render_template,
    redirect,
    url_for,
    flash,
)
from sqlalchemy.exc import (
    InvalidRequestError,
    DataError,
    InterfaceError,
    DatabaseError,
)
from app import db

from usermodel import User
from distribusimodel import Distribusis

# UserPengguna
from statuspengguna.helper import (
    IsZipUploaded,
    IsCssSelected,
    CurrentDistribusi,
    IsDistribusiLive,
    DistribusiLimitReached,
)

from distribusiselector import SelectorVisible

# Forms!
from forms.uploadform import UploadForm
from forms.distribusiform import DistribusiForm
from forms.themeform import ThemeForm
from forms.publicthemeform import PublicThemeForm
from forms.selectorform import SelectorForm

from distribusisinfo import DistribusisInfo

# Tada!
from distribusi.cli import build_argparser
from distribusi.distribusi import distribusify


def DistribusiWorkflow():
    distribusiform = DistribusiForm()
    current_distribusi = CurrentDistribusi()
    user = User.query.filter_by(email=current_user.email).first()
    distribusi = Distribusis.query.filter_by(
        distribusiname=current_distribusi
    ).first()

    if distribusiform.validate_on_submit():
        userfolder = os.path.join("stash", distribusi.distribusiname)
        cssfile = GetCssFile(distribusi)
        UnzipDistribusiFiles(distribusi, userfolder)
        RunDistribusi(userfolder, cssfile)
        SetDistribusiToVisible(distribusi, user)
        DeleteCssFile(cssfile)
        return redirect(url_for("index"))

    return RenderDistribusiTemplate(distribusiform, current_distribusi)


def UnzipDistribusiFiles(distribusi, userfolder):
    zipfilename = "{}.zip".format(distribusi.distribusiname)
    unzipfile = os.path.join(userfolder, zipfilename)

    if os.path.exists(unzipfile):
        with zipfile.ZipFile(unzipfile, "r") as zip_ref:
            zip_ref.extractall(userfolder)
    # after extracting all files remove zip file.
    if os.path.exists(unzipfile):
        os.remove(os.path.join(userfolder, zipfilename))


def GetCssFile(distribusi):
    cssfile = ""
    cssfolder = os.path.join("themes/userthemes", distribusi.distribusiname)
    for filename in os.listdir(cssfolder):
        if filename.endswith(".css"):
            cssfile = os.path.join(cssfolder, filename)
    return cssfile


def RunDistribusi(userfolder, cssfile):
    parser = build_argparser()
    args = parser.parse_args(["--menu-with-index", "-s", cssfile])
    distribusify(args, userfolder)


def SetDistribusiToVisible(distribusi, user):
    try:
        distribusi.visible = True
        user.currentdistribusi = None
        db.session.commit()
    except (InvalidRequestError, DataError, InterfaceError, DatabaseError):
        db.session.rollback()
        flash("Unknown error occured!")


def DeleteCssFile(cssfile):
    if os.path.exists(cssfile):
        os.remove(cssfile)


def RenderDistribusiTemplate(distribusiform, current_distribusi):
    uploadform = UploadForm()
    themeform = ThemeForm()
    publicthemeform = PublicThemeForm()
    publicthemeform.publicthemes.choices = DistribusisInfo.publicthemes()
    selectorform = SelectorForm()
    selectorform.distribusis.choices = DistribusisInfo.userdistribusinames()
    selectorvisible = SelectorVisible()

    files_uploaded = IsZipUploaded(current_distribusi)
    distribusi_live = IsDistribusiLive(current_distribusi)
    css_selected = IsCssSelected(current_distribusi)
    limit_reached = DistribusiLimitReached()
    template = render_template(
        "distribusi.html",
        uploadform=uploadform,
        distribusiform=distribusiform,
        themeform=themeform,
        publicthemeform=publicthemeform,
        selectorform=selectorform,
        files_uploaded=files_uploaded,
        distribusi_live=distribusi_live,
        css_selected=css_selected,
        selectorvisible=selectorvisible,
        limit_reached=limit_reached,
    )
    return template