import { CONTACT_MESSAGE_TYPES, type ContactMessageAdminView } from "@batch-cooking/shared";
import { useEffect, useState } from "react";
import { useTranslation } from "react-i18next";
import { adminApiClient } from "../../../api/admin-client";
import "../admin-page.scss";
import "./messages-page.scss";

type MessagesState =
  | { status: "loading" }
  | { status: "loaded"; rows: ContactMessageAdminView[] }
  | { status: "error" };

/**
 * Contact-form messages (issue #80) — a read-only list of the bug reports /
 * suggestions users have sent from `/parametres/contact`, newest first,
 * capped server-side at 200. One optional filter (by `type`); no actions,
 * no triage workflow in this first version.
 */
export function MessagesPage() {
  const { t } = useTranslation();
  const [type, setType] = useState("");
  const [state, setState] = useState<MessagesState>({ status: "loading" });

  useEffect(() => {
    let cancelled = false;
    setState({ status: "loading" });
    adminApiClient
      .getContactMessages({ type: type || undefined })
      .then((rows) => {
        if (!cancelled) setState({ status: "loaded", rows });
      })
      .catch(() => {
        if (!cancelled) setState({ status: "error" });
      });
    return () => {
      cancelled = true;
    };
  }, [type]);

  return (
    <div className="admin-page">
      <h1 className="admin-page__title">{t("admin.messages.title")}</h1>
      <p className="admin-page__lead">{t("admin.messages.lead")}</p>

      <div className="messages-filters">
        <label>
          {t("admin.messages.filter.type")}
          <select value={type} onChange={(event) => setType(event.target.value)}>
            <option value="">{t("admin.messages.filter.any")}</option>
            {CONTACT_MESSAGE_TYPES.map((option) => (
              <option key={option} value={option}>
                {t(`admin.messages.type.${option}`)}
              </option>
            ))}
          </select>
        </label>
      </div>

      {state.status === "loading" && (
        <p className="admin-page__placeholder">{t("admin.common.loading")}</p>
      )}
      {state.status === "error" && (
        <p className="admin-page__placeholder">{t("admin.common.loadError")}</p>
      )}
      {state.status === "loaded" && state.rows.length === 0 && (
        <p className="admin-page__placeholder">{t("admin.messages.empty")}</p>
      )}
      {state.status === "loaded" && state.rows.length > 0 && (
        <div className="messages-table-wrap">
          <table className="messages-table">
            <thead>
              <tr>
                <th>{t("admin.messages.col.date")}</th>
                <th>{t("admin.messages.col.sender")}</th>
                <th>{t("admin.messages.col.type")}</th>
                <th>{t("admin.messages.col.message")}</th>
                <th>{t("admin.messages.col.page")}</th>
                <th>{t("admin.messages.col.userAgent")}</th>
              </tr>
            </thead>
            <tbody>
              {state.rows.map((row) => (
                <tr key={row.id}>
                  <td className="messages-table__date">
                    {new Date(row.createdAt).toLocaleString("fr-FR")}
                  </td>
                  <td>
                    {row.author ? (
                      <>
                        {row.author.firstName} {row.author.lastName}
                        <br />
                        <span className="messages-table__email">{row.author.email}</span>
                      </>
                    ) : (
                      <span className="messages-table__deleted">
                        {t("admin.messages.deletedAuthor")}
                      </span>
                    )}
                  </td>
                  <td>
                    <span className={`messages-badge messages-badge--${row.type}`}>
                      {t(`admin.messages.type.${row.type}`)}
                    </span>
                  </td>
                  <td className="messages-table__message">{row.message}</td>
                  <td className="messages-table__page">{row.pageUrl ?? "—"}</td>
                  <td className="messages-table__ua" title={row.userAgent ?? undefined}>
                    {row.userAgent ?? "—"}
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      )}
    </div>
  );
}