#!/usr/bin/env python3
import bottle
from bottle.ext import sqlalchemy
from sqlalchemy import create_engine, event
from sqlalchemy.engine import Engine

import database
import routes

# Initialize db and include the SQLAlchemy plugin in bottle
engine = create_engine('sqlite:///:memory:', echo=True)

app = bottle.Bottle()
plugin = sqlalchemy.Plugin(
    # SQLAlchemy engine created with create_engine function.
    engine,
    # SQLAlchemy metadata, required only if create=True.
    database.Base.metadata,
    # Keyword used to inject session database in a route (default 'db').
    keyword='db',
    # If it is true, execute `metadata.create_all(engine)` when plugin is
    # applied (default False).
    create=True,
    # If it is true, plugin commit changes after route is executed (default
    # True).
    commit=True,
    # If it is true and keyword is not defined, plugin uses **kwargs argument
    # to inject session database (default False).
    use_kwargs=False
)

app.install(plugin)


# Auto enable foreign keys for SQLite
@event.listens_for(Engine, "connect")
def set_sqlite_pragma(dbapi_connection, connection_record):
    cursor = dbapi_connection.cursor()
    cursor.execute("PRAGMA foreign_keys=ON")
    cursor.close()


# Routes
app.get("/papers", callback=routes.get.fetch_papers)
app.get("/papers/<id:int>", callback=routes.get.fetch_by_id)

# TODO: Fetch relationships


app.post("/papers", callback=routes.post.create_paper)

# TODO: Update relationships


if __name__ == "__main__":
    app.run(host='localhost', port=8080, debug=True)