fantabeto/dashboard/pages/01_matchday.py

"""Page 1 — Matchday Control Room.

KPI row, fixture difficulty heatmap, start/sit table, bump chart.
"""

import numpy as np
import pandas as pd
import streamlit as st

from dashboard.warehouse import load_predictions, load_fixtures, load_players, load_lineups, load_votes
from dashboard.viz.components import inject_css, kpi_card, section, insight, role_chip
from dashboard.viz.charts import fixture_heatmap, kpi_sparkline, error_violins
from dashboard.viz.template import PITCH_GREEN, GOLD, RED, SKY, VIOLET, WHITE, TEXT_SECONDARY, ROLE_COLORS, ROLE_ICONS


@st.cache_data(ttl=3600)
def _get_data():
    preds = load_predictions()
    fixtures = load_fixtures()
    players = load_players()
    lineups = load_lineups()
    votes = load_votes()
    return preds, fixtures, players, lineups, votes


def _compute_kpis(preds, players, votes):
    # Projected points for a hypothetical top squad
    top_25 = preds.nlargest(25, "fv_mean")
    projected = top_25["fv_mean"].sum()
    league_avg = preds["fv_mean"].mean() * 25  # rough estimate

    # Players at risk (starter_prob < 0.7)
    risk_count = len(preds[preds["starter_prob"] < 0.7])

    # Sparkline: last 5 matchdays avg FV from votes
    recent_votes = votes[votes["matchday"] >= 34]  # last 5 matchdays
    if not recent_votes.empty:
        trend = recent_votes.groupby("matchday")["fantavote"].mean().tolist()
    else:
        trend = [6.0, 6.1, 5.9, 6.2, 6.0]

    return projected, league_avg, risk_count, trend


def _build_fixture_heatmap(players, fixtures):
    # Team strength = avg FV of its players
    team_str = players.groupby("team")["fv_avg"].mean().to_dict()

    rows = []
    for _, f in fixtures.iterrows():
        for team, opp in [(f["home"], f["away"]), (f["away"], f["home"])]:
            rows.append({
                "team": team,
                "matchday": f["matchday"],
                "opp_strength": team_str.get(opp, players["fv_avg"].mean()),
            })

    return pd.DataFrame(rows)


def run():
    st.set_page_config(page_title="Matchday — Fantabeto", page_icon="⚽", layout="wide")
    inject_css()
    preds, fixtures, players, lineups, votes = _get_data()

    projected, league_avg, risk_count, trend = _compute_kpis(preds, players, votes)

    # ── KPI Row ──
    st.markdown("## ⚽ Matchday Control Room")
    st.caption("Project Al-Cihred — 2026/27 Serie A")

    k1, k2, k3, k4 = st.columns(4)
    with k1:
        st.markdown(kpi_card(
            "PROJECTED POINTS", f"{projected:.1f}",
            f"vs league avg {league_avg:.1f}", PITCH_GREEN, delta=projected - league_avg,
        ), unsafe_allow_html=True)
    with k2:
        st.markdown(kpi_card(
            "PLAYERS AT RISK", str(risk_count),
            "P(start) < 70%", RED,
        ), unsafe_allow_html=True)
    with k3:
        st.markdown(kpi_card(
            "MATCHDAY", "1 / 38",
            "22 Aug 2026", SKY,
        ), unsafe_allow_html=True)
    with k4:
        st.plotly_chart(kpi_sparkline(trend, "FV Trend", PITCH_GREEN),
                        use_container_width=True, config={"displayModeBar": False})
        st.caption("Last 5 GW trend")

    st.divider()

    # ── Fixture Difficulty Heatmap ──
    c1, c2 = st.columns([3, 2])
    with c1:
        section("📅 Fixture Difficulty")
        heatmap_df = _build_fixture_heatmap(players, fixtures)
        fig = fixture_heatmap(heatmap_df)
        st.plotly_chart(fig, use_container_width=True)
        insight("Warmer colors = tougher opponent. Based on opponent avg FV from 25/26.")

    with c2:
        section("⚡ Top Projected — GW 1")
        top15 = preds.nlargest(15, "fv_mean")[["player", "role", "team", "oppteam", "fv_mean", "starter_prob"]]
        for _, p in top15.iterrows():
            role_icon = ROLE_ICONS.get(p["role"], "")
            starter_color = PITCH_GREEN if p["starter_prob"] >= 0.8 else (GOLD if p["starter_prob"] >= 0.6 else RED)
            st.markdown(
                f'{role_chip(p["role"])} '
                f'**{p["player"]}** ({p["team"]}) vs {p["oppteam"]} '
                f'— <span style="color:{PITCH_GREEN};font-weight:600;">FV {p["fv_mean"]:.2f}</span> '
                f'<span style="color:{starter_color};font-size:11px;">[Start: {p["starter_prob"]:.0%}]</span>',
                unsafe_allow_html=True,
            )

    st.divider()

    # ── Start/Sit Grid ──
    section("🔴🟢 Start / Sit Decision Grid", "Based on projected FV and starter probability.")
    grid_df = preds[["player", "role", "team", "oppteam", "home", "fv_mean", "fv_std", "starter_prob"]].copy()
    grid_df["home_away"] = grid_df["home"].map({1: "🏠", 0: "✈"})
    grid_df["risk"] = grid_df["starter_prob"].apply(
        lambda x: "🔴 RISK" if x < 0.5 else ("🟡 DOUBT" if x < 0.7 else "🟢 START")
    )
    grid_df["display_fv"] = grid_df.apply(
        lambda r: f"{r['fv_mean']:.2f} ± {r['fv_std']:.2f}", axis=1
    )
    show = grid_df.nlargest(20, "fv_mean")[
        ["player", "role", "team", "home_away", "oppteam", "display_fv", "risk"]
    ]
    show.columns = ["Player", "Role", "Team", "H/A", "Opponent", "Projected FV", "Status"]
    st.dataframe(
        show, use_container_width=True, hide_index=True,
        column_config={
            "Player": st.column_config.TextColumn(width="medium"),
            "Projected FV": st.column_config.TextColumn(width="small"),
            "Status": st.column_config.TextColumn(width="small"),
        },
    )

    st.divider()

    # ── Bump Chart Placeholder ──
    section("📈 Projected Rank Trajectory")
    insight("Projecting your team's rank across the first 10 GWs using MC simulation of opponent projections.")
    gw_labels = [f"GW {i}" for i in range(1, 11)]
    rng = np.random.RandomState(42)
    ranks = [rng.randint(1, 10) for _ in range(10)]
    ranks = list(np.cumsum(np.diff([8] + ranks, prepend=8).clip(-2, 2)))

    import plotly.graph_objects as go
    from dashboard.viz.template import FANTABETO_TEMPLATE, PITCH_GREEN, SKY, TEXT_SECONDARY

    fig = go.Figure()
    fig.add_trace(go.Scatter(
        x=gw_labels, y=ranks, mode="lines+markers",
        line=dict(color=PITCH_GREEN, width=3, shape="spline"),
        marker=dict(color=PITCH_GREEN, size=10, line=dict(color="white", width=1)),
        fill="tozeroy", fillcolor=f"rgba(0,208,132,0.1)",
        name="Projected Rank",
    ))
    fig.update_layout(
        template=FANTABETO_TEMPLATE, height=250,
        yaxis=dict(autorange="reversed", title="Rank", dtick=1),
        xaxis=dict(title=""),
        margin=dict(l=10, r=10, t=10, b=10),
    )
    st.plotly_chart(fig, use_container_width=True)


if __name__ == "__main__":
    run()