import { useEffect, useState } from "react";
import { del, get, patch, post } from "../api";
import { fmtRelative, useT } from "../i18n";
import { navigate } from "../router";
import { confirmDialog, toast } from "../dialogs";
import { Icon } from "./Icon";
import { Spinner } from "./Activity";
import { NewJobDialog } from "./NewJobDialog";

export interface JobInfo {
  id: string;
  path: string;
  enabled: boolean;
  last_run?: number | null;
  last_session_id?: string | null;
  last_status?: string | null;
  next_run?: number | null;
  error?: string;
  webhook?: boolean;
  spec?: { name: string; schedule: string; agent: string; model?: string | null; permission_mode: string; timeout_minutes: number; prompt: string; assistant_session?: string | null };
}

const fmtDate = (ms?: number | null) => (ms ? new Date(ms).toLocaleString(undefined, { dateStyle: "medium", timeStyle: "short" }) : "–");

/** Automations: agents started on a schedule with the instructions from a Markdown file. */
export function Jobs({ onMenu }: { onMenu: () => void }) {
  const t = useT();
  const [jobs, setJobs] = useState<JobInfo[]>();
  const [path, setPath] = useState("");
  const [busy, setBusy] = useState<string>();
  const [hook, setHook] = useState<{ id: string; url: string; secret: string }>();
  const [templates, setTemplates] = useState(false);

  const reload = () =>
    get<JobInfo[]>("/jobs")
      .then(setJobs)
      .catch((e) => toast(e.message));
  useEffect(() => {
    void reload();
    const h = setInterval(reload, 15000);
    return () => clearInterval(h);
  }, []);

  const act = async (id: string, f: () => Promise<unknown>) => {
    setBusy(id);
    try {
      await f();
      await reload();
    } catch (e: any) {
      toast(e.message);
    } finally {
      setBusy(undefined);
    }
  };

  return (
    <>
      <div className="topbar">
        <button className="ghost menu-btn" onClick={onMenu} aria-label={t("nav.menu")}>
          <Icon name="menu" />
        </button>
        <div className="grow">
          <h1>{t("nav.jobs")}</h1>
        </div>
      </div>
      <div className="page">
        <div className="page-inner" style={{ maxWidth: 980 }}>
          <div className="notice">{t("jobs.intro")}</div>
          <div className="row" style={{ margin: "12px 0" }}>
            <button className="primary" onClick={() => setTemplates(true)}>
              <Icon name="plus" /> {t("jobs.new")}
            </button>
          </div>
          {templates && <NewJobDialog onClose={() => setTemplates(false)} />}
          {!jobs && <div className="empty"><Spinner /></div>}
          {jobs?.length === 0 && <div className="empty">{t("jobs.none")}</div>}
          {jobs?.map((j) => (
            <div key={j.id} className={`panel job ${j.enabled ? "" : "off"}`}>
              <div className="job-head">
                <Icon name="clock" className="job-icon" />
                <div style={{ flex: 1, minWidth: 0 }}>
                  <h3>
                    <button className="link-btn job-title" onClick={() => navigate(`/jobs/${j.id}`)}>
                      {j.spec?.name ?? j.path.split("/").pop()}
                    </button>
                  </h3>
                  <div className="hint mono">{j.path}</div>
                </div>
                <label className="switch" title={t(j.enabled ? "jobs.disable" : "jobs.enable")}>
                  <input type="checkbox" checked={j.enabled} onChange={(e) => act(j.id, () => patch(`/jobs/${j.id}`, { enabled: e.target.checked }))} />
                  <span>{t(j.enabled ? "jobs.on" : "jobs.off")}</span>
                </label>
              </div>
              {j.error ? (
                <div className="notice err">{j.error}</div>
              ) : (
                <div className="job-grid">
                  <span>{t("jobs.schedule")}</span>
                  <code>{j.spec?.schedule}</code>
                  <span>{t("jobs.next")}</span>
                  <span>{j.enabled ? fmtDate(j.next_run) : "–"}</span>
                  <span>{t("jobs.last")}</span>
                  <span>
                    {j.last_run ? `${fmtRelative(j.last_run)} · ` : "–"}
                    {j.last_status && <span className={`chip ${j.last_status === "done" ? "ok" : j.last_status === "running" ? "" : "warn"}`}>{t(`jobs.status.${j.last_status.startsWith("error") ? "error" : j.last_status}` as any)}</span>}
                    {j.last_session_id && (
                      <button className="link-btn" style={{ marginLeft: 8 }} onClick={() => navigate(`/s/${j.last_session_id}`)}>
                        {t("jobs.openRun")}
                      </button>
                    )}
                  </span>
                  <span>{t("jobs.mode")}</span>
                  <span>
                    {j.spec?.agent} · {j.spec?.model || t("agents.sessionModel")} · {t(`permissionMode.${j.spec?.permission_mode ?? "auto"}` as any)} · max {j.spec?.timeout_minutes} min
                  </span>
                </div>
              )}
              {j.last_status?.startsWith("error") && <div className="notice err">{j.last_status}</div>}
              {j.spec && (
                <details className="job-prompt">
                  <summary>{t("jobs.prompt")}</summary>
                  <pre>{j.spec.prompt}</pre>
                </details>
              )}
              <div className="job-hook">
                <span>
                  <Icon name="external" /> {t("jobs.webhook")}: {j.webhook ? t("jobs.on") : t("jobs.off")}
                </span>
                <button
                  className="small ghost"
                  onClick={() =>
                    act(j.id, async () => {
                      const r = await post<{ url?: string; secret?: string }>(`/jobs/${j.id}/webhook`, { enable: !j.webhook });
                      if (r.url && r.secret) setHook({ id: j.id, url: r.url, secret: r.secret });
                    })
                  }
                >
                  {j.webhook ? t("jobs.webhookOff") : t("jobs.webhookOn")}
                </button>
                {j.webhook && (
                  <button
                    className="small ghost"
                    onClick={() =>
                      act(j.id, async () => {
                        const r = await post<{ url: string; secret: string }>(`/jobs/${j.id}/webhook`, { enable: true });
                        setHook({ id: j.id, url: r.url, secret: r.secret });
                      })
                    }
                  >
                    {t("jobs.webhookRenew")}
                  </button>
                )}
              </div>
              {hook?.id === j.id && (
                <div className="notice ok">
                  <div>{t("jobs.webhookShown")}</div>
                  <div className="mono" style={{ marginTop: 6, wordBreak: "break-all" }}>URL: {hook.url}</div>
                  <div className="mono" style={{ wordBreak: "break-all" }}>Secret: {hook.secret}</div>
                  <div className="hint" style={{ marginTop: 6 }}>{t("jobs.webhookHelp")}</div>
                  <pre className="job-example">{`curl -X POST ${hook.url} \\\n  -H "X-CodeCraft-Secret: ${hook.secret}" \\\n  -H "Content-Type: application/json" -d '{"event":"test"}'`}</pre>
                </div>
              )}
              <div className="row" style={{ gap: 8, marginTop: 10 }}>
                <button className="small" disabled={busy === j.id || !!j.error} onClick={() => act(j.id, async () => {
                  const r = await post<{ session_id: string }>(`/jobs/${j.id}/run`, {});
                  navigate(`/s/${r.session_id}`);
                })}>
                  {busy === j.id ? <Spinner small /> : <Icon name="play" />} {t("jobs.runNow")}
                </button>
                <button className="small" onClick={() => navigate(`/jobs/${j.id}`)}>
                  <Icon name="edit" /> {t("jobs.edit")}
                </button>
                <span className="grow" />
                <button
                  className="small ghost danger"
                  onClick={async () => {
                    if (await confirmDialog({ message: t("jobs.deleteConfirm", { name: j.spec?.name ?? j.path }), danger: true })) void act(j.id, () => del(`/jobs/${j.id}`));
                  }}
                >
                  <Icon name="trash" /> {t("jobs.remove")}
                </button>
              </div>
            </div>
          ))}
          <div className="panel">
            <h3>{t("jobs.register")}</h3>
            <div className="hint" style={{ marginBottom: 8 }}>{t("jobs.registerHint")}</div>
            <div className="row" style={{ gap: 8 }}>
              <input className="mono" style={{ flex: 1, minWidth: 0 }} value={path} placeholder="/workspace/project/.codecraft/jobs/nightly.md" onChange={(e) => setPath(e.target.value)} />
              <button disabled={!path.trim()} onClick={() => act("new", async () => {
                const j = await post<JobInfo>("/jobs", { path: path.trim() });
                setPath("");
                navigate(`/jobs/${j.id}`);
              })}>
                {t("jobs.registerBtn")}
              </button>
            </div>
          </div>
        </div>
      </div>
    </>
  );
}