// ClawdDotNet — Analysis › Prompt History (#660)
//
// Recorded prompts and responses of every run, searchable over the full transcript, plus
// how long they are kept: an instance default (14 days unless changed) and an override per
// agent - "never" for an agent that handles secrets, "forever" or many days to debug one.
//
// Transcripts are foreign text and only ever inserted via textContent.

import { api } from "../modules/api.js";
import { erstelleElement, erstelleKarte, formatiereDatumZeit, formatiereTokens, zeigeMeldung } from "../modules/dom.js";
import { navigiere } from "../modules/router.js";
import { t } from "../modules/i18n.js";
import { readFilters, applyFilters, rangeOf, loadFacets, buildFilterBar } from "../modules/usage-filters.js";
import { statusBadge, sourceLabel } from "./usage-runs.js";

const PATH = "/prompt-history";
const PAGE_SIZE = 25;
const NEVER = 0;
const FOREVER = -1;

export async function renderPromptHistory() {
  const container = document.getElementById("ansicht-inhalt");
  if (!container) return;

  const filters = readFilters();
  const layout = erstelleElement("div", { klasse: "verbrauch-ansicht" });
  layout.append(
    erstelleElement("h1", { text: t("history.title") }),
    erstelleElement("p", { klasse: "hinweis", text: t("history.intro") }));

  const facets = await loadFacets(filters);
  layout.append(buildFilterBar(filters, facets, (next) => applyFilters(PATH, next), ["range", "agent", "q"]));

  const list = erstelleElement("div", {}, erstelleElement("div", { klasse: "hinweis-zentriert", text: t("common.loading") }));
  const settings = erstelleElement("div", {});
  layout.append(list, settings);
  container.replaceChildren(layout);

  await Promise.all([loadList(list, filters), loadSettings(settings)]);
}

async function loadList(target, filters) {
  const { from, to } = rangeOf(filters);
  const query = new URLSearchParams({ from, to, offset: String(filters.offset || 0), limit: String(PAGE_SIZE) });
  if (filters.agent) query.set("agent", filters.agent);
  if (filters.q) query.set("q", filters.q);

  let page;
  try {
    page = await api(`/prompt-history?${query}`);
  } catch (err) {
    target.replaceChildren(erstelleKarte(t("history.unavailable"), [erstelleElement("p", { klasse: "gedaempft", text: err.message })]));
    return;
  }

  if (page.items.length === 0) {
    target.replaceChildren(erstelleKarte(t("history.empty.title"), [
      erstelleElement("p", { klasse: "gedaempft", text: filters.q ? t("history.empty.search") : t("history.empty.text") })
    ]));
    return;
  }

  const items = page.items.map((item) => {
    const open = () => navigiere(`#${PATH}/${encodeURIComponent(item.runId)}`);
    const card = erstelleElement("div", { klasse: "verlauf-eintrag klickbar", tabindex: "0", onclick: open });
    card.addEventListener("keydown", (event) => { if (event.key === "Enter") open(); });

    card.append(
      erstelleElement("div", { klasse: "verlauf-kopf" },
        erstelleElement("strong", { text: item.agentId }),
        erstelleElement("span", { klasse: "gedaempft klein", text: `${formatiereDatumZeit(item.startedAt)} · ${sourceLabel(item.source)} · ${item.model}` }),
        statusBadge(item.status)),
      erstelleElement("div", { klasse: "verlauf-zeile" },
        erstelleElement("span", { klasse: "verlauf-marke", text: t("history.prompt") }),
        erstelleElement("span", { klasse: "verlauf-text", text: item.prompt || "—" })),
      erstelleElement("div", { klasse: "verlauf-zeile" },
        erstelleElement("span", { klasse: "verlauf-marke", text: t("history.response") }),
        erstelleElement("span", { klasse: "verlauf-text", text: item.response || "—" })));

    if (item.truncated) {
      card.append(erstelleElement("div", { klasse: "gedaempft klein", text: t("history.truncated", { chars: formatiereTokens(item.sizeChars) }) }));
    }
    return card;
  });

  const offset = filters.offset || 0;
  const pager = erstelleElement("div", { klasse: "blaettern" },
    erstelleElement("button", {
      type: "button", klasse: "schaltflaeche flach klein", text: t("common.previous"), disabled: offset <= 0,
      onclick: () => applyFilters(PATH, { ...filters, offset: Math.max(0, offset - PAGE_SIZE) })
    }),
    erstelleElement("span", { klasse: "gedaempft", text: t("runs.page", { from: offset + 1, to: offset + page.items.length, total: page.total }) }),
    erstelleElement("button", {
      type: "button", klasse: "schaltflaeche flach klein", text: t("common.next"), disabled: offset + PAGE_SIZE >= page.total,
      onclick: () => applyFilters(PATH, { ...filters, offset: offset + PAGE_SIZE })
    }));

  target.replaceChildren(erstelleKarte(t("history.list", { n: page.total }), [...items, pager]));
}

// ─── Retention settings ───

function modeOf(days) {
  if (days === null || days === undefined) return "inherit";
  if (days === NEVER) return "never";
  if (days === FOREVER) return "forever";
  return "days";
}

/** A mode select plus a day count that is only shown for "days". */
function retentionInput(days, allowInherit) {
  const modes = allowInherit ? ["inherit", "never", "days", "forever"] : ["never", "days", "forever"];
  const mode = erstelleElement("select", { "aria-label": t("history.settings.mode") });
  for (const m of modes) mode.append(erstelleElement("option", { value: m, text: t(`history.settings.mode.${m}`) }));
  mode.value = modeOf(days);

  const count = erstelleElement("input", {
    type: "number", min: "1", step: "1", value: days > 0 ? String(days) : "14", "aria-label": t("history.settings.days")
  });
  const unit = erstelleElement("span", { klasse: "gedaempft klein", text: t("history.settings.daysUnit") });
  const dayBox = erstelleElement("span", { klasse: "gruppe-horizontal" }, count, unit);
  const sync = () => { dayBox.hidden = mode.value !== "days"; };
  mode.addEventListener("change", sync);
  sync();

  return {
    element: erstelleElement("span", { klasse: "gruppe-horizontal aufbewahrung" }, mode, dayBox),
    value() {
      switch (mode.value) {
        case "inherit": return null;
        case "never": return NEVER;
        case "forever": return FOREVER;
        default: return Math.max(1, Math.round(Number(count.value) || 14));
      }
    }
  };
}

function describe(days) {
  if (days === NEVER) return t("history.settings.effective.never");
  if (days === FOREVER) return t("history.settings.effective.forever");
  return t("history.settings.effective.days", { n: days });
}

async function loadSettings(target) {
  let settings;
  try {
    settings = await api("/prompt-history/settings");
  } catch (err) {
    target.replaceChildren();
    return;
  }

  const instance = retentionInput(settings.defaultRetentionDays, false);
  const rows = [];

  const table = erstelleElement("table", { klasse: "daten-tabelle" });
  const head = erstelleElement("tr", {});
  for (const label of ["history.settings.agent", "history.settings.retention", "history.settings.effective"]) {
    head.append(erstelleElement("th", { text: t(label) }));
  }
  table.append(head);

  for (const agent of settings.agents) {
    const input = retentionInput(agent.retentionDays, true);
    rows.push({ agentId: agent.agentId, input, before: agent.retentionDays ?? null });
    table.append(erstelleElement("tr", {},
      erstelleElement("td", { text: agent.displayName }),
      erstelleElement("td", {}, input.element),
      erstelleElement("td", { klasse: "gedaempft", text: describe(agent.effectiveRetentionDays) })));
  }

  const save = erstelleElement("button", {
    type: "button",
    klasse: "schaltflaeche primaer klein",
    text: t("history.settings.save"),
    onclick: async () => {
      const body = { defaultRetentionDays: instance.value(), agents: [] };
      for (const row of rows) {
        const value = row.input.value();
        if (value !== row.before) body.agents.push({ agentId: row.agentId, retentionDays: value });
      }
      save.disabled = true;
      try {
        const result = await api("/prompt-history/settings", { method: "PUT", body });
        zeigeMeldung(result?.message ?? t("history.settings.saved"), "erfolg");
        await loadSettings(target);
      } catch (err) {
        zeigeMeldung(t("history.settings.failed", { error: err.message }), "gefahr");
        save.disabled = false;
      }
    }
  });

  target.replaceChildren(erstelleKarte(t("history.settings.title"), [
    erstelleElement("p", { klasse: "hinweis", text: t("history.settings.intro") }),
    erstelleElement("div", { klasse: "gruppe-horizontal" },
      erstelleElement("strong", { text: t("history.settings.default") }), instance.element),
    erstelleElement("div", { klasse: "tabelle-scroll" }, table),
    save
  ]));
}