import os
import shutil

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from flask_login import LoginManager
from flask_assets import Environment as AssetsEnvironment, Bundle as AssetsBundle

db = SQLAlchemy()
migrate = Migrate()
login = LoginManager()
assets = AssetsEnvironment()

def create_app():
    
    app = Flask(__name__, instance_relative_config=True)

    app.config.from_mapping(POST_UPLOADS=os.path.join(app.instance_path, 'post'), SQLALCHEMY_TRACK_MODIFICATIONS=False)
    try:
        os.makedirs(app.instance_path)

        # os.makedirs(app.config.get('POST_UPLOADS'))
        for d in ['img', 'jpeg', 'sample', 'thumb']:
            os.makedirs(os.path.join(app.config.get('POST_UPLOADS'), d))

        # shutil.copyfile(os.path.join(app.root_path, 'config.def.py'), os.path.join(app.instance_path, 'config.py'))
    except OSError:
        pass

    app.config.from_pyfile('config.py')


    db.init_app(app)
    migrate.init_app(app, db)
    login.init_app(app)
    assets.init_app(app)

    from yadc.bp import main, post, auth, manage, user
    app.register_blueprint(main.bp)
    app.register_blueprint(post.bp, url_prefix='/post')
    app.register_blueprint(auth.bp, url_prefix='/auth')
    app.register_blueprint(manage.bp, url_prefix='/manage')
    app.register_blueprint(user.bp, url_prefix='/user')

    login.login_view = 'auth.login'
    
    from yadc import utils
    @app.context_processor
    def utility_processor():
        return dict(utils=utils)

    
    with app.app_context():
        assets.append_path(os.path.join(app.root_path, 'assets'))
        # print(assets.load_path)
    #assets.url = app.static_url_path
    scss = AssetsBundle(
        'main.scss',
        depends=('*.scss'), filters=['libsass','cssmin'], output='all.css')
    assets.register('scss_all', scss)
    js = AssetsBundle(
        'formswitchers.js', 'base.js',
        'search.js',
        # filters='rjsmin',
        output='all.js')
    assets.register('js_all', js)

    return app


from yadc import models as m

app = create_app()
@app.shell_context_processor
def make_shell_context():
    ctxt = {'db': db}

    for mdl in [m.User, m.Post, m.Tag, m.Comment]:
        ctxt[mdl.__name__] = mdl
    
    return ctxt
    # return {'db': db, 'User': models.User, 'Post': models.Post, 'Tag': models.Tag, 'Comment': models.Comment}