import os
import shutil
import zipfile

from distribusi.distribusi import distribusify
from flask import flash, redirect, render_template, url_for
from flask_login import current_user
from sqlalchemy.exc import (
    DatabaseError,
    DataError,
    InterfaceError,
    InvalidRequestError,
)

from app import db, APP
from distribusikan.add_files_to_describer import add_distribusi_files_to_db
from distribusikan.distribusi_selector import selector_visible
from distribusikan.distribusis_info import DistribusisInfo
from distribusikan.forms.distribusiform import DistribusiForm
from distribusikan.forms.publicthemeform import PublicThemeForm
from distribusikan.forms.selectorform import SelectorForm
from distribusikan.forms.themeform import ThemeForm

# Forms!
from distribusikan.forms.uploadform import UploadForm
from models.distribusi_model import Distribusis
from models.user_model import User

# UserPengguna
from statuspengguna.helper import UserHelper


def distribusi_workflow():
    distribusiform = DistribusiForm()
    current_distribusi = UserHelper.current_distribusi()
    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 = get_css_file(distribusi)
        unzip_distribusi_files(distribusi, userfolder)
        clean_up_distribusi_files(userfolder)
        add_distribusi_files_to_db(distribusi.distribusiname)
        run_distribusi(userfolder, cssfile)
        set_distribusi_to_visible(distribusi, user)
        delete_css_file(cssfile)
        return redirect(url_for("index"))

    return render_distribusi_template(distribusiform, current_distribusi)


def unzip_distribusi_files(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 clean_up_distribusi_files(userfolder):
    if os.path.exists(userfolder):
        remove_mac_folders(userfolder)


def remove_mac_folders(path):
    for filename in os.listdir(path):
        fullpath = os.path.join(path, filename)
        if filename.startswith("."):
            if os.path.isdir(fullpath):
                shutil.rmtree(fullpath)
            else:
                os.remove(fullpath)
        if filename == "__MACOSX":
            shutil.rmtree(fullpath)
        if os.path.isdir(fullpath):
            remove_mac_folders(fullpath)


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


def run_distribusi(userfolder, cssfile):
    APP.logger.info(
        f"Run distribusi on this folder: {userfolder} with css:{cssfile}"
    )
    distribusify(userfolder, cssfile)


def set_distribusi_to_visible(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 delete_css_file(cssfile):
    if os.path.exists(cssfile):
        os.remove(cssfile)


def render_distribusi_template(distribusiform, current_distribusi):
    uploadform = UploadForm()
    themeform = ThemeForm()
    publicthemeform = PublicThemeForm()
    publicthemeform.publicthemes.choices = DistribusisInfo.public_themes()
    selectorform = SelectorForm()
    selectorform.distribusis.choices = DistribusisInfo.user_distribusinames()
    selectorvisible = selector_visible()

    files_uploaded = UserHelper.is_zip_uploaded(current_distribusi)
    distribusi_live = UserHelper.is_distribusi_live(current_distribusi)
    css_selected = UserHelper.is_css_selected(current_distribusi)
    limit_reached = UserHelper.distribusi_limit_reached()
    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