from flask import abort, current_app, flash, Markup, render_template, url_for
from flask_login import login_required, current_user
from threading import Thread
from app import db
from app.decorators import admin_required, permission_required 
from app.models import Permission, SpaCyNLPPipelineModel, TesseractOCRPipelineModel
from . import bp
from .forms import TesseractOCRModelContributionForm, EditForm, SpacyNLPModelContributionForm


@bp.before_request
@login_required
@permission_required(Permission.CONTRIBUTE)
def before_request():
    pass


@bp.route('/')
@login_required
@admin_required
def contributions():
    tesseract_ocr_user_models = [
        x for x in current_user.tesseract_ocr_pipeline_models
    ]
    spacy_nlp_user_models = [
        x for x in current_user.spacy_nlp_pipeline_models
    ]
    return render_template(
        'contributions/contribution_overview.html.j2',
        tesseract_ocr_user_models=tesseract_ocr_user_models,
        spacy_nlp_user_models=spacy_nlp_user_models,
        userId = current_user.hashid,
        title='Contribution Overview'
    )

@bp.route('/edit-tesseract-model/<hashid:tesseract_ocr_pipeline_model_id>', methods=['GET', 'POST'])
@login_required
def tesseract_ocr_pipeline_model(tesseract_ocr_pipeline_model_id):
    tesseract_ocr_pipeline_model = TesseractOCRPipelineModel.query.get_or_404(
        tesseract_ocr_pipeline_model_id
    )
    form = EditForm(prefix='tesseract-ocr-model-edit-form')
    if form.validate_on_submit():
        if tesseract_ocr_pipeline_model.title != form.title.data:
            tesseract_ocr_pipeline_model.title = form.title.data
        if tesseract_ocr_pipeline_model.description != form.description.data:
            tesseract_ocr_pipeline_model.description = form.description.data
        if tesseract_ocr_pipeline_model.publisher != form.publisher.data:
            tesseract_ocr_pipeline_model.publisher = form.publisher.data
        if tesseract_ocr_pipeline_model.publishing_year != form.publishing_year.data:
            tesseract_ocr_pipeline_model.publishing_year = form.publishing_year.data
        if tesseract_ocr_pipeline_model.publisher_url != form.publisher_url.data:
            tesseract_ocr_pipeline_model.publisher_url = form.publisher_url.data
        if tesseract_ocr_pipeline_model.publishing_url != form.publishing_url.data:
            tesseract_ocr_pipeline_model.publishing_url = form.publishing_url.data
        if tesseract_ocr_pipeline_model.version != form.version.data:
            tesseract_ocr_pipeline_model.version = form.version.data
        if tesseract_ocr_pipeline_model.shared != form.shared.data:
            tesseract_ocr_pipeline_model.shared = form.shared.data
        db.session.commit()
        message = Markup(f'Model "<a href="contribute/{tesseract_ocr_pipeline_model.hashid}">{tesseract_ocr_pipeline_model.title}</a>" updated')
        flash(message, category='corpus')
        return {}, 201, {'Location': url_for('contributions.contributions')}
    form.prefill(tesseract_ocr_pipeline_model)
    return render_template(
        'contributions/tesseract_ocr_pipeline_model.html.j2',
        tesseract_ocr_pipeline_model=tesseract_ocr_pipeline_model,
        form=form,
        title='Edit your Tesseract OCR model'
    )

@bp.route('/edit-tesseract-model/<hashid:tesseract_ocr_pipeline_model_id>', methods=['DELETE'])
@login_required
def delete_tesseract_model(tesseract_ocr_pipeline_model_id):
    def _delete_tesseract_model(app, tesseract_ocr_pipeline_model_id):
        with app.app_context():
            model = TesseractOCRPipelineModel.query.get(tesseract_ocr_pipeline_model_id)
            model.delete()
            db.session.commit()
    
    model = TesseractOCRPipelineModel.query.get_or_404(tesseract_ocr_pipeline_model_id)
    if not (model.user == current_user or current_user.is_administrator()):
        abort(403)
    thread = Thread(
        target=_delete_tesseract_model,
        args=(current_app._get_current_object(), tesseract_ocr_pipeline_model_id)
    )
    thread.start()
    return {}, 202

@bp.route('/add-tesseract-ocr-pipeline-model', methods=['GET', 'POST'])
def add_tesseract_ocr_pipeline_model():
    form = TesseractOCRModelContributionForm(
        prefix='contribute-tesseract-ocr-pipeline-model-form'
    )
    if form.is_submitted():
        if not form.validate():
            response = {'errors': form.errors}
            return response, 400
        try:
            tesseract_ocr_model = TesseractOCRPipelineModel.create(
                form.tesseract_model_file.data,
                compatible_service_versions=form.compatible_service_versions.data,
                description=form.description.data,
                publisher=form.publisher.data,
                publisher_url=form.publisher_url.data,
                publishing_url=form.publishing_url.data,
                publishing_year=form.publishing_year.data,
                shared=form.shared.data,
                title=form.title.data,
                version=form.version.data,
                user=current_user
            )
        except OSError:
            abort(500)
        db.session.commit()
        message = Markup(f'Model "{tesseract_ocr_model.title}" created')
        flash(message)
        return {}, 201, {'Location': url_for('contributions.contributions')}
    tesseract_ocr_pipeline_models = [
        x for x in TesseractOCRPipelineModel.query.all()
    ]
    
    return render_template(
        'contributions/contribute_tesseract_ocr_models.html.j2',
        form=form,
        tesseract_ocr_pipeline_models=tesseract_ocr_pipeline_models,
        title='Tesseract OCR Model Contribution'
    )

@bp.route('/edit-spacy-model//<hashid:spacy_nlp_pipeline_model_id>', methods=['GET', 'POST'])
@login_required
def spacy_nlp_pipeline_model(spacy_nlp_pipeline_model_id):
    spacy_nlp_pipeline_model = SpaCyNLPPipelineModel.query.get_or_404(
        spacy_nlp_pipeline_model_id
    )
    form = EditForm(prefix='spacy-nlp-model-edit-form')
    if form.validate_on_submit():
        if spacy_nlp_pipeline_model.title != form.title.data:
            spacy_nlp_pipeline_model.title = form.title.data
        if spacy_nlp_pipeline_model.description != form.description.data:
            spacy_nlp_pipeline_model.description = form.description.data
        if spacy_nlp_pipeline_model.publisher != form.publisher.data:
            spacy_nlp_pipeline_model.publisher = form.publisher.data
        if spacy_nlp_pipeline_model.publishing_year != form.publishing_year.data:
            spacy_nlp_pipeline_model.publishing_year = form.publishing_year.data
        if spacy_nlp_pipeline_model.publisher_url != form.publisher_url.data:
            spacy_nlp_pipeline_model.publisher_url = form.publisher_url.data
        if spacy_nlp_pipeline_model.publishing_url != form.publishing_url.data:
            spacy_nlp_pipeline_model.publishing_url = form.publishing_url.data
        if spacy_nlp_pipeline_model.version != form.version.data:
            spacy_nlp_pipeline_model.version = form.version.data
        if spacy_nlp_pipeline_model.shared != form.shared.data:
            spacy_nlp_pipeline_model.shared = form.shared.data
        db.session.commit()
        message = Markup(f'Model "<a href="contribute/{spacy_nlp_pipeline_model.hashid}">{spacy_nlp_pipeline_model.title}</a>" updated')
        flash(message, category='corpus')
        return {}, 201, {'Location': url_for('contributions.contributions')}
    form.prefill(spacy_nlp_pipeline_model)
    return render_template(
        'contributions/spacy_nlp_pipeline_model.html.j2',
        spacy_nlp_pipeline_model=spacy_nlp_pipeline_model,
        form=form,
        title='Edit your spaCy NLP model'
    )

@bp.route('/edit-spacy-model/<hashid:spacy_nlp_pipeline_model_id>', methods=['DELETE'])
@login_required
def delete_spacy_model(spacy_nlp_pipeline_model_id):
    def _delete_spacy_model(app, spacy_nlp_pipeline_model_id):
        with app.app_context():
            model = SpaCyNLPPipelineModel.query.get(spacy_nlp_pipeline_model_id)
            model.delete()
            db.session.commit()
    
    model = SpaCyNLPPipelineModel.query.get_or_404(spacy_nlp_pipeline_model_id)
    if not (model.user == current_user or current_user.is_administrator()):
        abort(403)
    thread = Thread(
        target=_delete_spacy_model,
        args=(current_app._get_current_object(), spacy_nlp_pipeline_model_id)
    )
    thread.start()
    return {}, 202

@bp.route('/add-spacy-nlp-pipeline-model', methods=['GET', 'POST'])
def add_spacy_nlp_pipeline_model():
    form = SpacyNLPModelContributionForm(prefix='contribute-spacy-nlp-pipeline-model-form')
    if form.is_submitted():
        if not form.validate():
            response = {'errors': form.errors}
            return response, 400
        try:
            spacy_nlp_model = SpaCyNLPPipelineModel.create(
                form.spacy_model_file.data,
                compatible_service_versions=form.compatible_service_versions.data,
                description=form.description.data,
                publisher=form.publisher.data,
                publisher_url=form.publisher_url.data,
                publishing_url=form.publishing_url.data,
                publishing_year=form.publishing_year.data,
                shared=form.shared.data,
                title=form.title.data,
                version=form.version.data,
                user=current_user
            )
        except OSError:
            abort(500)
        db.session.commit()
        message = Markup(f'Model "{spacy_nlp_model.title}" created')
        flash(message)
        return {}, 201, {'Location': url_for('contributions.contributions')}
    spacy_nlp_pipeline_models = [
        x for x in SpaCyNLPPipelineModel.query.all()
    ]
    return render_template(
        'contributions/contribute_spacy_nlp_models.html.j2',
        form=form,
        spacy_nlp_pipeline_models=spacy_nlp_pipeline_models,
        title='spaCy NLP Model Contribution'
    )