from __future__ import annotations

import json
from datetime import timedelta

from gibil.classes.oracle.store import OracleStore


class OracleQualityDisplay:
    """Renders oracle prediction quality tables."""

    def render(self) -> str:
        return """
        <section class="panel oracle-quality-panel" data-module="oracle-quality-display">
          <div class="panel-heading">
            <div>
              <h2>Oracle Quality</h2>
              <p>Prediction error by model and horizon</p>
            </div>
            <div class="control-row">
              <label>
                Window
                <select id="quality-lookback">
                  <option value="24">24 hours</option>
                  <option value="168" selected>7 days</option>
                  <option value="720">30 days</option>
                </select>
              </label>
            </div>
          </div>
          <div class="table-shell">
            <table>
              <thead>
                <tr>
                  <th>Kind</th>
                  <th>Model</th>
                  <th>Horizon</th>
                  <th>Samples</th>
                  <th>Bias</th>
                  <th>MAE</th>
                  <th>Median AE</th>
                  <th>MAPE</th>
                  <th>Coverage</th>
                </tr>
              </thead>
              <tbody id="quality-rows"></tbody>
            </table>
          </div>
        </section>
        <script>
        window.astrapeModules = window.astrapeModules || {};
        window.astrapeModules.oracleQualityDisplay = (() => {
          function init() {
            document.getElementById("quality-lookback").addEventListener("change", refresh);
            refresh();
            setInterval(refresh, 10000);
          }

          async function refresh() {
            const lookback = document.getElementById("quality-lookback").value;
            const response = await fetch(`/api/oracle-quality?lookback_hours=${lookback}`, { cache: "no-store" });
            const payload = await response.json();
            render(payload.rows || []);
          }

          function render(rows) {
            const tbody = document.getElementById("quality-rows");
            if (!rows.length) {
              tbody.innerHTML = `<tr><td colspan="9">No evaluated oracle predictions yet.</td></tr>`;
              return;
            }
            tbody.innerHTML = rows.map((row) => `
              <tr>
                <td>${escapeHtml(row.kind)}</td>
                <td>${escapeHtml(row.model_version)}</td>
                <td>${formatHorizon(row)}</td>
                <td>${row.evaluated_count}</td>
                <td class="${biasClass(row.mean_error_w)}">${formatW(row.mean_error_w)}</td>
                <td>${formatW(row.mean_absolute_error_w)}</td>
                <td>${formatW(row.median_absolute_error_w)}</td>
                <td>${formatPct(row.mean_absolute_pct_error)}</td>
                <td>${formatPct(row.interval_coverage)}</td>
              </tr>
            `).join("");
          }

          function formatHorizon(row) {
            if (row.horizon_label) return row.horizon_label;
            return `${row.min_horizon_minutes}-${row.max_horizon_minutes}m`;
          }

          function formatW(value) {
            if (value === null || value === undefined) return "n/a";
            return `${Math.round(Number(value))} W`;
          }

          function formatPct(value) {
            if (value === null || value === undefined) return "n/a";
            return `${(Number(value) * 100).toFixed(1)}%`;
          }

          function biasClass(value) {
            if (value === null || value === undefined) return "";
            const absolute = Math.abs(Number(value));
            if (absolute < 250) return "metric-good";
            if (absolute < 1000) return "metric-warn";
            return "metric-bad";
          }

          function escapeHtml(value) {
            return String(value ?? "")
              .replace(/&/g, "&amp;")
              .replace(/</g, "&lt;")
              .replace(/>/g, "&gt;")
              .replace(/"/g, "&quot;")
              .replace(/'/g, "&#039;");
          }

          return { init };
        })();
        window.astrapeModules.oracleQualityDisplay.init();
        </script>
        """

    def data_payload(self, lookback_hours: float = 168) -> str:
        try:
            rows = OracleStore.from_env().load_evaluation_summary(
                lookback=timedelta(hours=lookback_hours)
            )
        except Exception:
            rows = []

        return json.dumps(
            {
                "lookback_hours": lookback_hours,
                "rows": [self._row(row) for row in rows],
            }
        )

    def _row(self, row: dict[str, object]) -> dict[str, object]:
        return {
            key: self._json_value(value)
            for key, value in row.items()
        }

    def _json_value(self, value: object) -> object:
        if value is None or isinstance(value, (str, int, float, bool)):
            return value
        try:
            return float(value)
        except (TypeError, ValueError):
            return str(value)