import os
import re
import pandas as pd
import plotly.express as px
import streamlit as st

st.set_page_config(layout="wide")
DATA_FILE = "data/aclanthology2016-23_specter2_base.json"
THEMES = {"cluster": "fall", "year": "mint", "source": "phase"}


def to_string_authors(list_of_authors):
    if len(list_of_authors) > 5:
        return ", ".join(list_of_authors[:5]) + ", et al."
    elif len(list_of_authors) > 2:
        return ", ".join(list_of_authors[:-1]) + ", and " + list_of_authors[-1]
    else:
        return " and ".join(list_of_authors)


def load_df(data_file: os.PathLike):
    df = pd.read_json(data_file, orient="records")
    df["x"] = df["point2d"].apply(lambda x: x[0])
    df["y"] = df["point2d"].apply(lambda x: x[1])

    df["authors_trimmed"] = df.authors.apply(
        lambda row: to_string_authors(
            [(x[x.index(",") + 1 :].strip() + " " + x.split(",")[0].strip()) if "," in x else x for x in row]
        )
    )

    if "publication_type" in df.columns:
        df["type"] = df["publication_type"]
        df = df.drop(columns=["point2d", "publication_type"])
    else:
        df = df.drop(columns=["point2d"])
    return df


@st.cache_data
def load_dataframe():
    return load_df(DATA_FILE)


DF = load_dataframe()
DF["opacity"] = 0.04
min_year, max_year = DF["year"].min(), DF["year"].max()

with st.sidebar:
    venues = st.multiselect(
        "Venues",
        ["ACL", "EMNLP", "NAACL", "TACL"],
        ["ACL", "EMNLP", "NAACL", "TACL"],
    )

    start_year, end_year = st.select_slider(
        "Publication year",
        options=[str(y) for y in range(min_year, max_year + 1)],
        value=(str(min_year), str(max_year)),
    )
    author_names = st.text_input("Author names (separated by comma)")

    title = st.text_input("Title")

    start_year = int(start_year)
    end_year = int(end_year)
    df_mask = (DF["year"] >= start_year) & (DF["year"] <= end_year)
    if 0 < len(venues) < 4:
        selected_venues = [v.lower() for v in venues]
        df_mask = df_mask & DF["source"].isin(selected_venues)
    elif not venues:
        st.write(":red[Please select a venue]")

    if author_names:
        authors = [a.strip() for a in author_names.split(",")]
        author_mask = DF.authors.apply(
            lambda row: all(any(re.match(rf".*{a}.*", x, re.IGNORECASE) for x in row) for a in authors)
        )
        df_mask = df_mask & author_mask

    if title:
        df_mask = df_mask & DF.title.apply(lambda x: title.lower() in x.lower())

    DF.loc[df_mask, "opacity"] = 1.0
    st.write(f"Number of points: {DF[df_mask].shape[0]}")

    color = st.selectbox("Color", ("cluster", "year", "source"))


fig = px.scatter(
    DF,
    x="x",
    y="y",
    opacity=DF["opacity"],
    color=color,
    width=1000,
    height=800,
    custom_data=("title", "authors_trimmed", "year", "source", "type"),
    color_continuous_scale=THEMES[color],
)
fig.update_traces(
    hovertemplate="<b>%{customdata[0]}</b><br>%{customdata[1]}<br>%{customdata[2]}<br><i>%{customdata[3]}</i>"
)
fig.update_layout(
    # margin=dict(l=10, r=10, t=10, b=10),
    showlegend=False,
    font=dict(
        family="Times New Roman",
        size=30,
    ),
    hoverlabel=dict(
        align="left",
        font_size=14,
        font_family="Rockwell",
        namelength=-1,
    ),
)
fig.update_xaxes(title="")
fig.update_yaxes(title="")

st.plotly_chart(fig, use_container_width=True)