import time
import webbrowser
from pathlib import Path
from threading import Thread
from typing import Any, Final, cast

import dash_cytoscape as cyto
import plotly.express as px
from dash import (
    Dash,
    Input,
    Output,
    State,
    callback,
    dash_table,
    dcc,
    html,
)
from pandas import DataFrame

import lang_main.io
from lang_main.analysis import graphs, tokens
from lang_main.constants import SAVE_PATH_FOLDER, SPCY_MODEL
from lang_main.types import EntryPoints, ObjectID, TimelineCandidates

# ** data
# p_df = Path(r'../results/test_20240619/TIMELINE.pkl').resolve()
p_df = lang_main.io.get_entry_point(SAVE_PATH_FOLDER, EntryPoints.TIMELINE)
(data,) = cast(tuple[DataFrame], lang_main.io.load_pickle(p_df))
# p_tl = Path(r'../results/test_20240619/TIMELINE_POSTPROCESSING.pkl').resolve()
p_tl = lang_main.io.get_entry_point(SAVE_PATH_FOLDER, EntryPoints.TIMELINE_POST)
cands, texts = cast(
    tuple[TimelineCandidates, dict[ObjectID, str]], lang_main.io.load_pickle(p_tl)
)


TABLE_FEATS: Final[list[str]] = [
    'ErstellungsDatum',
    'ErledigungsDatum',
    'VorgangsTypName',
    'VorgangsBeschreibung',
]
TABLE_FEATS_DATES: Final[list[str]] = [
    'ErstellungsDatum',
    'ErledigungsDatum',
]

# ** figure config
MARKERS: Final[dict[str, Any]] = {
    'size': 12,
    'color': 'yellow',
    'line': {
        'width': 2,
        'color': 'red',
    },
}
HOVER_DATA: Final[dict[str, Any]] = {
    'ErstellungsDatum': '|%d.%m.%Y',
    'VorgangsBeschreibung': True,
}

# ** graph
# target = '../results/test_20240529/Pipe-Token_Analysis_Step-1_build_token_graph.pkl'
# p = Path(target).resolve()
p_tk_graph = lang_main.io.get_entry_point(SAVE_PATH_FOLDER, EntryPoints.TK_GRAPH_POST)
ret = lang_main.io.load_pickle(p_tk_graph)
tk_graph = cast(graphs.TokenGraph, ret[0])
tk_graph_filtered = graphs.filter_graph_by_edge_weight(tk_graph, 150, None)
tk_graph_filtered = graphs.filter_graph_by_node_degree(tk_graph_filtered, 1, None)
# tk_graph_filtered = tk_graph.filter_by_edge_weight(150, None)
# tk_graph_filtered = tk_graph_filtered.filter_by_node_degree(1, None)
cyto_data_base, weight_data = graphs.convert_graph_to_cytoscape(tk_graph_filtered)

MIN_WEIGHT = weight_data['min']
MAX_WEIGHT = weight_data['max']

cyto.load_extra_layouts()

cose_layout = {
    'name': 'cose',
    'nodeOverlap': 500,
    'refresh': 20,
    'fit': True,
    'padding': 20,
    'randomize': False,
    'componentSpacing': 1.2,
    'nodeRepulsion': 1000,
    'edgeElasticity': 1000,
    'idealEdgeLength': 100,
    'nestingFactor': 1.2,
    'gravity': 50,
    'numIter': 3000,
    'initialTemp': 2000,
    'coolingFactor': 0.7,
    'minTemp': 1.0,
    'nodeDimensionsIncludeLabels': True,
}

my_stylesheet = [
    # Group selectors
    {
        'selector': 'node',
        'style': {
            'shape': 'circle',
            'content': 'data(label)',
            'background-color': '#B10DC9',
            'border-width': 2,
            'border-color': 'black',
            'border-opacity': 1,
            'opacity': 1,
            'color': 'black',
            'text-opacity': 1,
            'font-size': 12,
            'z-index': 9999,
        },
    },
    {
        'selector': 'edge',
        'style': {
            #'width': f'mapData(weight, {MIN_WEIGHT}, {MAX_WEIGHT}, 1, 10)',
            # 'width': """function(ele) {
            #     return ele.data('weight');
            # """,
            'curve-style': 'bezier',
            'line-color': 'grey',
            'line-style': 'solid',
            'line-opacity': 1,
        },
    },
    # Class selectors
    # {'selector': '.red', 'style': {'background-color': 'red', 'line-color': 'red'}},
    # {'selector': '.triangle', 'style': {'shape': 'triangle'}},
]

graph_layout = html.Div(
    [
        html.Button('Trigger JS Weight', id='test_js_weight'),
        html.Button('Trigger Candidate Graph', id='graph-build-btn'),
        dcc.Store(id='graph-store', storage_type='memory'),
        dcc.Store(id='graph-store-cyto-curr_cands', storage_type='memory'),
        html.Div(id='output'),
        html.Div(
            [
                html.H2('Token Graph', style={'margin': 0}),
                html.Button(
                    'Reset Default',
                    id='bt-reset',
                    style={
                        'marginLeft': 'auto',
                        'width': '300px',
                    },
                ),
            ],
            style={
                'display': 'flex',
                'marginBottom': '1em',
            },
        ),
        html.H3('Layout'),
        dcc.Dropdown(
            id='layout_choice',
            options=[
                'cose',
                'cola',
                'euler',
                'random',
            ],
            value='cose',
            clearable=False,
        ),
        html.Div(
            [
                html.H3('Graph Filter'),
                dcc.Input(
                    id='graph-weight_min',
                    type='number',
                    min=MIN_WEIGHT,
                    max=MAX_WEIGHT,
                    step=1,
                    placeholder=f'Minimum edge weight: {MIN_WEIGHT} - {MAX_WEIGHT}',
                    debounce=True,
                    style={'width': '40%'},
                ),
                dcc.Input(
                    id='graph-weight_max',
                    type='number',
                    min=MIN_WEIGHT,
                    max=MAX_WEIGHT,
                    step=1,
                    placeholder=f'Maximum edge weight: {MIN_WEIGHT} - {MAX_WEIGHT}',
                    debounce=True,
                    style={'width': '40%'},
                ),
                html.H3('Graph'),
                html.Button('Re-Layout', id='graph-trigger_relayout'),
                html.Div(
                    [
                        cyto.Cytoscape(
                            id='cytoscape-graph',
                            style={'width': '100%', 'height': '600px'},
                            layout=cose_layout,
                            stylesheet=my_stylesheet,
                            elements=cyto_data_base,
                            zoom=1,
                        ),
                    ],
                    style={
                        'border': '3px solid black',
                        'borderRadius': '25px',
                        'marginTop': '1em',
                        'marginBottom': '2em',
                        'padding': '7px',
                    },
                ),
            ],
            style={'marginTop': '1em'},
        ),
    ],
)


# ** app
external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']
app = Dash(__name__, external_stylesheets=external_stylesheets)


app.layout = html.Div(
    [
        html.H1(children='Demo Zeitreihenanalyse', style={'textAlign': 'center'}),
        html.Div(
            children=[
                html.H2('Wählen Sie ein Objekt aus (ObjektID):'),
                dcc.Dropdown(
                    list(cands.keys()),
                    id='selector-obj_id',
                    placeholder='ObjektID auswählen...',
                ),
            ]
        ),
        html.Div(
            children=[
                html.H3(id='object-text'),
                dcc.Dropdown(id='selector-candidates'),
                dcc.Graph(id='graph-candidates'),
            ]
        ),
        html.Div(
            [dash_table.DataTable(id='table-candidates')], style={'marginBottom': '2em'}
        ),
        graph_layout,
    ],
    style={'margin': '2em'},
)


@callback(
    Output('object-text', 'children'),
    Input('selector-obj_id', 'value'),
    prevent_initial_call=True,
)
def update_obj_text(obj_id):
    obj_id = int(obj_id)
    obj_text = texts[obj_id]
    headline = f'HObjektText: {obj_text}'
    return headline


@callback(
    [Output('selector-candidates', 'options'), Output('selector-candidates', 'value')],
    Input('selector-obj_id', 'value'),
    prevent_initial_call=True,
)
def update_choice_candidates(obj_id):
    obj_id = int(obj_id)
    cands_obj_id = cands[obj_id]
    choices = list(range(1, len(cands_obj_id) + 1))
    return choices, choices[0]


# TODO check possible storage of pre-filtered result
# TODO change input of ``update_table_candidates`` and ``display_candidates_as_graph``
# TODO to storage component
@callback(
    Output('graph-candidates', 'figure'),
    Input('selector-candidates', 'value'),
    State('selector-obj_id', 'value'),
    prevent_initial_call=True,
)
def update_timeline(index, obj_id):
    obj_id = int(obj_id)
    # title
    obj_text = texts[obj_id]
    title = f'HObjektText: {obj_text}'
    # cands
    # cands_per_obj_id = cands[obj_id]
    # cands_similar = cands_per_obj_id[int(index) - 1]
    # data
    # df = data.loc[list(cands_similar)].sort_index()  # type: ignore
    df = pre_filter_data(data, idx=index, obj_id=obj_id)
    # figure
    fig = px.line(
        data_frame=df,
        x='ErstellungsDatum',
        y='ObjektID',
        title=title,
        hover_data=HOVER_DATA,
    )
    fig.update_traces(mode='markers+lines', marker=MARKERS, marker_symbol='diamond')
    fig.update_xaxes(
        tickformat='%B\n%Y',
        rangeslider_visible=True,
    )
    fig.update_yaxes(type='category')
    fig.update_layout(hovermode='x unified')
    return fig


@callback(
    [Output('table-candidates', 'data'), Output('table-candidates', 'columns')],
    Input('selector-candidates', 'value'),
    State('selector-obj_id', 'value'),
    prevent_initial_call=True,
)
def update_table_candidates(index, obj_id):
    df = pre_filter_data(data, idx=index, obj_id=obj_id)
    df = df.filter(items=TABLE_FEATS, axis=1).sort_values(
        by='ErstellungsDatum', ascending=True
    )
    cols = [{'name': i, 'id': i} for i in df.columns]
    # convert dates to strings
    for col in TABLE_FEATS_DATES:
        df[col] = df[col].dt.strftime(r'%Y-%m-%d')

    table_data = df.to_dict('records')
    return table_data, cols


def pre_filter_data(
    data: DataFrame,
    idx: int,
    obj_id: ObjectID,
) -> DataFrame:
    idx = int(idx)
    obj_id = int(obj_id)
    data = data.copy()
    # cands
    cands_obj_id = cands[obj_id]
    cands_choice = cands_obj_id[int(idx) - 1]
    # data
    data = data.loc[list(cands_choice)].sort_index()  # type: ignore

    return data


# ** graph callbacks
# TODO store pre-calculated graph
@app.callback(
    Output('cytoscape-graph', 'elements', allow_duplicate=True),
    Output('graph-weight_min', 'min', allow_duplicate=True),
    Output('graph-weight_min', 'max', allow_duplicate=True),
    Output('graph-weight_min', 'placeholder', allow_duplicate=True),
    Output('graph-weight_max', 'min', allow_duplicate=True),
    Output('graph-weight_max', 'max', allow_duplicate=True),
    Output('graph-weight_max', 'placeholder', allow_duplicate=True),
    Output('graph-store', 'data'),
    Output('graph-store-cyto-curr_cands', 'data'),
    # Input('graph-build-btn', 'n_clicks'),
    Input('selector-candidates', 'value'),
    State('selector-obj_id', 'value'),
    prevent_initial_call=True,
)
def display_candidates_as_graph(index, obj_id):
    t1 = time.perf_counter()
    df = pre_filter_data(data, idx=index, obj_id=obj_id)
    t2 = time.perf_counter()
    print(f'Time for filtering: {t2 - t1} s')

    t1 = time.perf_counter()
    tk_graph_cands, _ = tokens.build_token_graph(
        data=df,
        model=SPCY_MODEL,
        target_feature='VorgangsBeschreibung',
        build_map=False,
        logging_graph=False,
    )
    t2 = time.perf_counter()
    print(f'Time for graph building: {t2 - t1} s')

    t1 = time.perf_counter()
    cyto_data, weight_info = graphs.convert_graph_to_cytoscape(tk_graph_cands)
    weight_min = weight_info['min']
    weight_max = weight_info['max']
    placeholder_min = f'Minimum edge weight: {weight_min} - {weight_max}'
    placeholder_max = f'Maximum edge weight: {weight_min} - {weight_max}'
    t2 = time.perf_counter()
    print(f'Time for graph metadata and conversion: {t2 - t1} s')

    t1 = time.perf_counter()
    graph_to_store = lang_main.io.encode_to_base64_str(tk_graph_cands)
    t2 = time.perf_counter()
    print(f'Time for encoding: {t2 - t1} s')
    return (
        cyto_data,
        weight_min,
        weight_max,
        placeholder_min,
        weight_min,
        weight_max,
        placeholder_max,
        graph_to_store,
        cyto_data,
    )


@app.callback(
    Output('cytoscape-graph', 'layout', allow_duplicate=True),
    Input('layout_choice', 'value'),
    prevent_initial_call=True,
)
def update_layout_internal(layout_choice):
    # return {'name': layout_choice}
    return cose_layout
    # return cose_bilkent_layout
    # return cola_layout


@app.callback(
    Output('cytoscape-graph', 'zoom'),
    Output('cytoscape-graph', 'elements', allow_duplicate=True),
    Output('graph-weight_min', 'value'),
    Output('graph-weight_max', 'value'),
    Input('bt-reset', 'n_clicks'),
    State('graph-store-cyto-curr_cands', 'data'),
    prevent_initial_call=True,
)
def reset_layout(_, current_cands_cyto_elements):
    return (1, current_cands_cyto_elements, None, None)


# update edge weight
@app.callback(
    Output('cytoscape-graph', 'elements', allow_duplicate=True),
    Input('graph-weight_min', 'value'),
    Input('graph-weight_max', 'value'),
    State('graph-store', 'data'),
    State('graph-store-cyto-curr_cands', 'data'),
    State('graph-weight_min', 'min'),
    State('graph-weight_min', 'max'),
    prevent_initial_call=True,
)
def update_edge_weight(
    weight_min,
    weight_max,
    current_graph,
    current_cands_cyto_elements,
    current_min,
    current_max,
):
    if not any((weight_min, weight_max)):
        return current_cands_cyto_elements

    if weight_min is None:
        weight_min = current_min
    if weight_max is None:
        weight_max = current_max

    tk_graph = cast(graphs.TokenGraph, lang_main.io.decode_from_base64_str(current_graph))
    tk_graph_filtered = graphs.filter_graph_by_edge_weight(tk_graph, weight_min, weight_max)
    # tk_graph_filtered = tk_graph.filter_by_edge_weight(weight_min, weight_max)
    tk_graph_filtered = graphs.filter_graph_by_node_degree(tk_graph_filtered, 1, None)
    # tk_graph_filtered = tk_graph_filtered.filter_by_node_degree(1, None)
    cyto_data, _ = graphs.convert_graph_to_cytoscape(tk_graph_filtered)
    return cyto_data


# ** graph: layout with edge weight
app.clientside_callback(
    """
    function(n_clicks, layout) {
        layout.edgeElasticity = function(edge) {
            return edge.data().weight * 0.05;
        };
        layout.idealEdgeLength = function(edge) {
            return edge.data().weight * 0.4;
        };
        cy.layout(layout).run();
        return layout;
    }
    """,
    Output('cytoscape-graph', 'layout', allow_duplicate=True),
    Input('graph-trigger_relayout', 'n_clicks'),
    State('cytoscape-graph', 'layout'),
    prevent_initial_call=True,
)

# ** graph: display edge weight (line thickness)
app.clientside_callback(
    """
    function(n_clicks, stylesheet) {
        function edge_weight(ele) {
            let threshold = 1000;
            let weight = ele.data('weight');
            if (weight > threshold) {
                weight = 12;
            } else {
                weight = weight / threshold * 10;
                weight = Math.max(1, weight);
            }
            return weight;
        }
        stylesheet[1].style.width = edge_weight;
        cy.style(stylesheet).update();
        return stylesheet;
    }
    """,
    Output('cytoscape-graph', 'stylesheet'),
    Input('test_js_weight', 'n_clicks'),
    State('cytoscape-graph', 'stylesheet'),
    prevent_initial_call=False,
)


def _start_webbrowser():
    host = '127.0.0.1'
    port = '8050'
    adress = f'http://{host}:{port}/'
    time.sleep(2)
    webbrowser.open_new(adress)


def main():
    webbrowser_thread = Thread(target=_start_webbrowser, daemon=True)
    webbrowser_thread.start()
    app.run(debug=True)


if __name__ == '__main__':
    main()