import logging

from flask import Flask, jsonify, url_for, redirect, abort, request
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import text
from raven.contrib.flask import Sentry
import config

app = Flask(__name__)
if not config.DEBUG:
    sentry = Sentry(app=app, dsn=config.sentry_url, logging=True, level=logging.ERROR)
app.config['SQLALCHEMY_DATABASE_URI'] = "mysql+pymysql://{user}:{password}@{host}/{db}?{settings}".format(**config.db)
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)


@app.before_first_request
def setup_logging():
    if not app.debug:
        # In production mode, add log handler to sys.stderr.
        app.logger.addHandler(logging.StreamHandler())
        app.logger.setLevel(logging.INFO)


@app.errorhandler(404)
@app.errorhandler(400)
def handle_invalid_usage(error):
    response = jsonify({
        "code": error.code,
        "name": error.name,
        "description": error.description
    })
    response.status_code = error.code
    return response


@app.route('/api/venue/')
def get_venues():
    sql = text("SELECT * FROM venues")
    results = db.engine.execute(sql).fetchall()
    venues = []
    for row in results:
        venue = dict(row)
        venue["meals_url"] = url_for("get_meals", venueid=venue["id"], _external=True)
        venues.append(venue)
    return jsonify(venues)


@app.route('/api/venue/<int:venueid>/')
def get_meals(venueid):
    if request.args.get('mode', "week") == "week":
        sql_range = " AND YEARWEEK(date, 1) = YEARWEEK(CURDATE(), 1) + :offset"
    elif request.args.get('mode') == "day":
        sql_range = " AND date=DATE_ADD(CURDATE(), INTERVAL :offset DAY) "
    else:
        return abort(400)
    sql = """SELECT venue, date, name, description
FROM menus
  JOIN meals ON meals.id = menus.meal
WHERE venue = :venue"""
    results = db.engine.execute(text(sql + sql_range),
                                {"venue": venueid, "offset": request.args.get('offset', 0)}
                                ).fetchall()
    menus = []
    for row in results:
        menu = dict(row)
        menu["date"] = menu["date"].isoformat()
        menus.append(menu)
    return jsonify(menus)


@app.route("/api/")
def redirect_to_correct_api():
    return redirect(url_for("get_venues"))


if __name__ == "__main__":
    app.run(debug=True)