// src/SessionTable.jsx
import React, { useEffect, useState } from "react";
import { getSessionId } from "./useSessionId";

export default function SessionTable({ userId, onSelectSession, onClosePanel }) {
  const [sessions, setSessions] = useState([]);
  const [loading, setLoading] = useState(false);
  const [editingSessionId, setEditingSessionId] = useState(null);
  const [editName, setEditName] = useState("");
  const activeSessionId = getSessionId();

  const fetchSessions = async () => {
    setLoading(true);
    try {
      const res = await fetch(`/v1/sessions?user_id=${userId}`);
      const data = await res.json();
      setSessions(data);
    } catch (err) {
      console.error("Failed to fetch sessions", err);
    } finally {
      setLoading(false);
    }
  };

  useEffect(() => {
    if (userId) fetchSessions();
  }, [userId]);

  const startEditing = (session) => {
    setEditingSessionId(session.session_id);
    setEditName(session.session_name);
  };

  const saveName = async (sessionId) => {
    try {
      await fetch(`/v1/sessions/${sessionId}?user_id=${userId}`, {
        method: "PATCH",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ session_name: editName }),
      });
      setEditingSessionId(null);
      fetchSessions();
    } catch (err) {
      console.error("Failed to rename session", err);
    }
  };

  const deleteSession = async (sessionId) => {
    if (!window.confirm("Delete this session and its history?")) return;
    try {
      await fetch(`/v1/sessions/${sessionId}?user_id=${userId}`, { method: "DELETE" });
      fetchSessions();
    } catch (err) {
      console.error("Failed to delete session", err);
    }
  };

  return (
    <div className="table-responsive session-table">
      <table className="table table-striped table-hover align-middle">
        <thead>
          <tr>
            <th></th>
            <th>Session</th>
            <th>Created</th>
            <th className="text-nowrap"># mess</th>
            <th></th>
          </tr>
        </thead>
        <tbody>
          {loading && <tr><td colSpan="5" className="text-center">Loading…</td></tr>}
          {!loading && sessions.length === 0 && (
            <tr><td colSpan="5" className="text-center">No sessions found</td></tr>
          )}
          {!loading && sessions.map((s) => (
            <tr
              key={s.session_id}
              className={s.session_id === activeSessionId ? "table-primary" : ""}
            >
              <td className="text-end text-nowrap">
                <button
                  className="btn btn-sm px-1 btn-outline-secondary me-1"
                  onClick={() => startEditing(s)}
                  title="Rename"
                >✏️</button>
              </td>
              <td>
                {editingSessionId === s.session_id ? (
                  <input
                    type="text"
                    className="form-control form-control-sm"
                    value={editName}
                    onChange={(e) => setEditName(e.target.value)}
                    onBlur={() => saveName(s.session_id)}
                    onKeyDown={(e) => {
                      if (e.key === "Enter") saveName(s.session_id);
                      if (e.key === "Escape") setEditingSessionId(null);
                    }}
                    autoFocus
                  />
                ) : (
                  <span
                    role="button"
                    className="text-primary"
                    onClick={() => {
                      onSelectSession(s.session_id);
                      if (typeof onClosePanel === "function") onClosePanel();
                    }}
                    title="Click to load this session"
                  >
                    {s.session_name}
                  </span>
                )}
              </td>
              <td>{new Date(s.created_at).toLocaleString()}</td>
              <td title={s.history_size_bytes}>
                {s.message_count}
	      </td>
              <td className="text-end text-nowrap">
                <button
                  className="btn btn-sm px-1 btn-outline-danger"
                  onClick={() => deleteSession(s.session_id)}
                  title="Delete"
                >🗑️</button>
              </td>
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  );
}