import json

import algorithms
import store
from lib import run_server, get, post, read_html


nodes = None


@get('/')
def index():
    global nodes
    nodes = store.extract_osm_nodes("university.osm")
    return read_html('templates/index.html')


@get('/show-area')
def show_area():
    rect = dict()
    for (k, node) in enumerate(store.select_nodes_in_rectangle(nodes, 58.3984, 58.3990, 15.5733, 15.576)):
        rect[node.id] = node.coord_tuple()
    return json.dumps(rect)


@post('/shortest-path')
def shortest_path(body):
    body = json.loads(body)
    source_id = algorithms.get_closest_node_id(nodes, store.Node(-1, body['lat1'], body['lng1']))
    target_id = algorithms.get_closest_node_id(nodes, store.Node(-1, body['lat2'], body['lng2']))

    path, iterations = algorithms.find_shortest_path(nodes, source_id, target_id)
    edges = []
    for i in range(len(path)-1):
        edges.append({"path": [[nodes[path[i]].lat, nodes[path[i]].lng],
                               [nodes[path[i+1]].lat, nodes[path[i+1]].lng]],
                      "color": "#ff0000"})

    return json.dumps({"edges": edges})


run_server()