from flask import Flask, make_response, request, current_app
from simplejson import dumps
from pymongo import MongoClient
import datetime
import dateutil.parser
import bson

from datetime import timedelta
from functools import update_wrapper


def crossdomain(origin=None, methods=None, headers=None,
                max_age=21600, attach_to_all=True,
                automatic_options=True):
    if methods is not None:
        methods = ', '.join(sorted(x.upper() for x in methods))
    if headers is not None and not isinstance(headers, basestring):
        headers = ', '.join(x.upper() for x in headers)
    if not isinstance(origin, basestring):
        origin = ', '.join(origin)
    if isinstance(max_age, timedelta):
        max_age = max_age.total_seconds()

    def get_methods():
        if methods is not None:
            return methods

        options_resp = current_app.make_default_options_response()
        return options_resp.headers['allow']

    def decorator(f):
        def wrapped_function(*args, **kwargs):
            if automatic_options and request.method == 'OPTIONS':
                resp = current_app.make_default_options_response()
            else:
                resp = make_response(f(*args, **kwargs))
            if not attach_to_all and request.method != 'OPTIONS':
                return resp

            h = resp.headers

            h['Access-Control-Allow-Origin'] = origin
            h['Access-Control-Allow-Methods'] = get_methods()
            h['Access-Control-Max-Age'] = str(max_age)
            if headers is not None:
                h['Access-Control-Allow-Headers'] = headers
            return resp

        f.provide_automatic_options = False
        return update_wrapper(wrapped_function, f)
    return decorator


app = Flask(__name__)
client = MongoClient(**{'host': 'localhost', 'port': 27017})
db = client.showtimes

miscObjHandler = lambda obj: (
    obj.isoformat() if isinstance(obj, datetime.datetime)
    or isinstance(obj, datetime.date)
    else str(obj) if isinstance(obj, bson.objectid.ObjectId) else None)


@app.route('/flask/')
@crossdomain(origin='*')
def hello_world():
    return 'This comes from Flask ^_^'


@app.route('/groups/', methods=['GET'])
@crossdomain(origin='*')
def groups():
    known_groups = ['sf', 'major']
    json_dict = {
        'meta': {
            'total_count': len(known_groups)
        },
        'objects': known_groups
    }
    r = make_response(dumps(json_dict))
    r.mimetype = 'application/json'
    return r


@app.route('/theaters/', methods=['GET'])
@app.route('/theaters/<group>/', methods=['GET'])
@crossdomain(origin='*')
def list_theaters(group=None):
    if not group:
        result = db.theater.find()
    else:
        result = db.theater.find({'group': group})
    items = [i for i in result]
    json_dict = {
        'meta': {
            'total_count': len(items)
        },
        'objects': items
    }
    r = make_response(dumps(json_dict, default=miscObjHandler))
    r.mimetype = 'application/json'
    return r


@app.route('/showtimes/<group>/', methods=['GET'])
@app.route('/showtimes/<group>/<code>/', methods=['GET'])
@crossdomain(origin='*')
def list_showtimes(group=None, code=None):
    day = request.args.get('d', '')
    q = {}
    if day:
        q['date'] = dateutil.parser.parse(day)
    if group:
        q['group'] = group
    if code:
        q['theater'] = code

    result = db.showtimes.find(q)
    items = [i for i in result]
    json_dict = {
        'meta': {
            'total_count': len(items)
        },
        'objects': items
    }
    r = make_response(dumps(json_dict, default=miscObjHandler))
    r.mimetype = 'application/json'
    return r


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