from app import db, hashids
from app.models import Job, JobInput, JobStatus
from flask import (
    abort,
    current_app,
    flash,
    make_response,
    render_template,
    request,
    url_for
)
from flask_login import current_user, login_required
from werkzeug.utils import secure_filename
from . import bp
from . import SERVICES
from .forms import AddJobForms
import json


@bp.route('/corpus-analysis')
@login_required
def corpus_analysis():
    return render_template(
        'services/corpus_analysis.html.j2',
        title='Corpus analysis'
    )


@bp.route('/<service>', methods=['GET', 'POST'])
@login_required
def service(service):
    # Check if the requested service exist
    if service not in SERVICES or service not in AddJobForms:
        abort(404)
    version = request.args.get('version', SERVICES[service]['latest_version'])
    if version not in SERVICES[service]['versions']:
        abort(404)
    form = AddJobForms[service](prefix='add-job-form', version=version)
    title = SERVICES[service]['name']
    if form.is_submitted():
        if not form.validate():
            return make_response(form.errors, 400)
        service_args = {}
        if service == 'spacy-nlp':
            service_args['model'] = form.model.data
            if form.encoding_detection.data:
                service_args['encoding_detection'] = True
        if service == 'tesseract-ocr':
            service_args['model'] = hashids.decode(form.model.data)
            if form.binarization.data:
                service_args['binarization'] = True
        job = Job(
            user=current_user,
            description=form.description.data,
            service=service,
            service_args=json.dumps(service_args),
            service_version=form.version.data,
            title=form.title.data
        )
        db.session.add(job)
        db.session.flush(objects=[job])
        db.session.refresh(job)
        try:
            job.makedirs()
        except OSError as e:
            current_app.logger.error(e)
            db.session.rollback()
            flash('Internal Server Error', 'error')
            return make_response({'redirect_url': url_for('.service', service=service)}, 500)  # noqa
        for file in form.files.data:
            filename = secure_filename(file.filename)
            job_input = JobInput(
                filename=filename,
                job=job,
                mimetype=file.mimetype
            )
            db.session.add(job_input)
            db.session.flush(objects=[job_input])
            db.session.refresh(job_input)
            try:
                file.save(job_input.path)
            except OSError as e:
                current_app.logger.error(e)
                db.session.rollback()
                flash('Internal Server Error', 'error')
                return make_response({'redirect_url': url_for('.service', service=service)}, 500)  # noqa
        job.status = JobStatus.SUBMITTED
        db.session.commit()
        flash(f'Job "{job.title}" added', 'job')
        return make_response({'redirect_url': url_for('jobs.job', job_id=job.id)}, 201)  # noqa
    return render_template(
        f'services/{service.replace("-", "_")}.html.j2',
        form=form,
        title=title
    )