import os
from flask import (
    Blueprint,
    render_template,
    redirect,
    url_for,
    send_from_directory,
    flash,
)
from flask_login import current_user, login_required
from sqlalchemy.exc import (
    DatabaseError,
    DataError,
    IntegrityError,
    InterfaceError,
    InvalidRequestError,
)
from app import db
from models.distribusi_model import Distribusis
from models.distribusi_file_model import DistribusiFiles
from describer.forms.describe_files_form import DescribeFilesForm
from describer.forms.redistribusi_form import ReDistribusiForm
from distribusikan.distribusi_workflow import run_distribusi, get_css_file

describer = Blueprint(
    "describer",
    __name__,
    template_folder="templates/describe_files",
    static_folder="static",
)


@describer.route("/<string:distribusiname>")
@login_required
def show_distribusi_files(distribusiname):
    if not current_user.is_authenticated:
        return redirect(url_for("index"))
    distribusi = Distribusis.query.filter_by(
        distribusiname=distribusiname
    ).first()
    redistribusi_form = ReDistribusiForm()
    distribusi_file_forms = get_distribusi_file_forms(distribusi.id)
    return render_template(
        "describe.html",
        distribusiname=distribusiname,
        redistribusi_form=redistribusi_form,
        distribusi_file_forms=distribusi_file_forms,
    )


@describer.route("/redistribusi/<string:distribusiname>", methods=["POST"])
@login_required
def re_distribusi_files(distribusiname):
    distribusi = Distribusis.query.filter_by(
        distribusiname=distribusiname
    ).first()
    redistribusi_form = ReDistribusiForm()
    if redistribusi_form.validate_on_submit():
        userfolder = os.path.join("stash", distribusi.distribusiname)
        cssfile = get_css_file(distribusi)
        run_distribusi(userfolder, cssfile)
    return redirect(
        url_for(
            "describer.show_distribusi_files",
            distribusiname=distribusi.distribusiname,
        )
    )


@describer.route("/describe_file/<int:file_id>", methods=["POST"])
@login_required
def describe_file(file_id):
    distribusi_file = DistribusiFiles.query.filter_by(id=file_id).first()
    describe_form = DescribeFilesForm(
        distribusi_file.id, distribusi_file.path, distribusi_file.type
    )
    save_described_file_to_db(describe_form, distribusi_file)
    add_alttext_to_file(describe_form, distribusi_file)
    add_description_to_file(describe_form, distribusi_file)
    distribusi = Distribusis.query.filter_by(
        id=distribusi_file.distribusi
    ).first()
    return redirect(
        url_for(
            "describer.show_distribusi_files",
            distribusiname=distribusi.distribusiname,
        )
    )


@describer.route("/stash/<path:path>")
def send_stash_file(path):
    return send_from_directory("stash", path)


def get_distribusi_file_forms(distribusi_id):
    distribusi_file_forms = {}
    distribusi_files = DistribusiFiles.query.filter_by(
        distribusi=distribusi_id
    ).all()
    for distribusi_file in distribusi_files:
        describe_form = DescribeFilesForm(
            distribusi_file.id, distribusi_file.path, distribusi_file.type
        )
        describe_form.description.data = distribusi_file.description
        describe_form.alttext.data = distribusi_file.alttext
        describe_form.searchtags.data = distribusi_file.tags
        distribusi_file_forms[distribusi_file.id] = describe_form
    return distribusi_file_forms


def save_described_file_to_db(describe_form, distribusi_file):
    try:
        if describe_form.description.data:
            distribusi_file.description = describe_form.description.data
        if describe_form.alttext.data:
            distribusi_file.alttext = describe_form.alttext.data
        if describe_form.searchtags.data:
            distribusi_file.tags = describe_form.searchtags.data
        db.session.add(distribusi_file)
        db.session.commit()
    except (InvalidRequestError, IntegrityError):
        db.session.rollback()
        describe_form.save.errors.append("Something went wrong!")
        flash("Something went wrong!", "danger")
    except DataError:
        db.session.rollback()
        describe_form.save.errors.append("Invalid Entry")
        flash("Invalid Entry", "warning")
    except InterfaceError:
        db.session.rollback()
        describe_form.save.errors.append("Error connecting to the database")
        flash("Error connecting to the database", "danger")
    except DatabaseError:
        db.session.rollback()
        describe_form.save.errors.append("Error connecting to the database")
        flash("Error connecting to the database", "danger")


def add_alttext_to_file(describe_form, distribusi_file):
    if not describe_form.alttext.data:
        return
    filename = os.path.join("stash", distribusi_file.path)
    filename_no_ext = os.path.splitext(filename)[0]
    with open(f"{filename_no_ext}_alttext.txt", "w") as alttext_file:
        alttext_file.write(describe_form.alttext.data)
    return


def add_description_to_file(describe_form, distribusi_file):
    if not describe_form.description.data:
        return
    filename = os.path.join("stash", distribusi_file.path)
    filename_no_ext = os.path.splitext(filename)[0]
    with open(
        f"{filename_no_ext}_dv_description.txt", "w"
    ) as description_file:
        description_file.write(describe_form.description.data)
    return