import dash
import dash_core_components as dcc
import dash_html_components as html
import pandas as pd
import plotly.graph_objs as go
from collections import Counter
import pycountry

dataset = pd.read_csv('globalterrorismdb_0616dist.csv', encoding="ISO-8859-1",dtype = 'unicode')

app = dash.Dash()

app.title = 'Mijn eerste dash dashboard'

#titel = html.H1(children='Test Dashboard')
#subtitel = html.Div(children='... gemaakt in Dash', style={'color': 'blue'})

slider = dcc.Slider(
    id='my-slider',
    min=[dataset['iyear'].min()],
    max=[dataset['iyear'].max()],
    step=1,
    value=[dataset['iyear'].min()]
)

graph = dcc.Graph(id='graph')


plot_style = {'width': '50%', 'display': 'inline-block'}
plots = [html.Div(children=[graph], style=plot_style)]

app.layout = html.Div(children=[slider] + plots)

@app.callback(
    dash.dependencies.Output('graph', 'figure'),
    [dash.dependencies.Input('my-slider', 'value')])
def update_output(value):
    value = value[0]
    #value = '1970'
    df = dataset[dataset['iyear'] == value]

    countries = {}
    for country in pycountry.countries:
        countries[country.name] = country.alpha_3

        codes = [countries[country] for country in df['country_txt'] if country in countries]

        aantal = Counter(codes)

    aantal_per_jaar = pd.DataFrame.from_dict(aantal, orient='index').reset_index()
    aantal_per_jaar = aantal_per_jaar.rename(columns={'index':'land', 0:value})

    choropleth_map_trace = [go.Choropleth(
                                            locations = aantal_per_jaar['land'],
                                            z = aantal_per_jaar[value],
                                            autocolorscale = True,
                                            reversescale = False,
                                            marker = dict(
                                                            line = dict (
                                                                        color = 'rgb(180,180,180)',
                                                                        width = 0.5
                                                            )
                                            ),
                                            colorbar = dict(
                                                            title = 'Terrorisme'
                                            )
                            )
    ]

    choropleth = dcc.Graph(
                id = 'Graph',
                figure = dict(
                        data= choropleth_map_trace,
                        layout = dict(
                            title = 'Totaal aantal aanslagen over de jaren heen <br>' ,
                            geo = dict(
                                showframe = True,
                                showcoastlines = True,
                                projection = dict(
                                    type = 'Mercator'
                                )
                            )
                        )
                )
    )



#app.layout = html.Div(children=[titel, subtitel, choropleth])

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