import { readChannelAllowFromStore } from "openclaw/plugin-sdk/conversation-runtime";
import { resolveNativeSkillsEnabled } from "openclaw/plugin-sdk/native-command-config-runtime";
import type { OpenClawConfig } from "../runtime-api.js";
import type { ResolvedTelegramAccount } from "./accounts.js";
import { isNumericTelegramSenderUserId, normalizeTelegramAllowFromEntry } from "./allow-from.js";

function normalizeOptionalString(value: string | null | undefined): string | undefined {
  const normalized = value?.trim();
  return normalized ? normalized : undefined;
}

function collectInvalidTelegramAllowFromEntries(params: { entries: unknown; target: Set<string> }) {
  if (!Array.isArray(params.entries)) {
    return;
  }
  for (const entry of params.entries) {
    const normalized = normalizeTelegramAllowFromEntry(entry);
    if (!normalized || normalized === "*") {
      continue;
    }
    if (!isNumericTelegramSenderUserId(normalized)) {
      params.target.add(normalized);
    }
  }
}

export async function collectTelegramSecurityAuditFindings(params: {
  cfg: OpenClawConfig;
  accountId?: string | null;
  account: ResolvedTelegramAccount;
}) {
  const findings: Array<{
    checkId: string;
    severity: "info" | "warn" | "critical";
    title: string;
    detail: string;
    remediation?: string;
  }> = [];
  if (params.cfg.commands?.text === false) {
    return findings;
  }

  const telegramCfg = params.account.config ?? {};
  const accountId =
    normalizeOptionalString(params.accountId) ?? params.account.accountId ?? "default";
  const defaultGroupPolicy = params.cfg.channels?.defaults?.groupPolicy;
  const groupPolicy =
    (telegramCfg.groupPolicy as string | undefined) ?? defaultGroupPolicy ?? "allowlist";
  const groups = telegramCfg.groups as Record<string, unknown> | undefined;
  const groupsConfigured = Boolean(groups) && Object.keys(groups ?? {}).length > 0;
  const groupAccessPossible =
    groupPolicy === "open" || (groupPolicy === "allowlist" && groupsConfigured);
  if (!groupAccessPossible) {
    return findings;
  }

  const storeAllowFrom = await readChannelAllowFromStore("telegram", process.env, accountId).catch(
    () => [],
  );
  const storeHasWildcard = storeAllowFrom.some(
    (value) => (normalizeOptionalString(value) ?? "") === "*",
  );
  const invalidTelegramAllowFromEntries = new Set<string>();
  collectInvalidTelegramAllowFromEntries({
    entries: storeAllowFrom,
    target: invalidTelegramAllowFromEntries,
  });
  const groupAllowFrom = Array.isArray(telegramCfg.groupAllowFrom)
    ? telegramCfg.groupAllowFrom
    : [];
  const groupAllowFromHasWildcard = groupAllowFrom.some(
    (value) => (normalizeOptionalString(String(value)) ?? "") === "*",
  );
  collectInvalidTelegramAllowFromEntries({
    entries: groupAllowFrom,
    target: invalidTelegramAllowFromEntries,
  });
  collectInvalidTelegramAllowFromEntries({
    entries: Array.isArray(telegramCfg.allowFrom) ? telegramCfg.allowFrom : [],
    target: invalidTelegramAllowFromEntries,
  });

  let anyGroupOverride = false;
  if (groups) {
    for (const value of Object.values(groups)) {
      if (!value || typeof value !== "object") {
        continue;
      }
      const group = value as Record<string, unknown>;
      const allowFrom = Array.isArray(group.allowFrom) ? group.allowFrom : [];
      if (allowFrom.length > 0) {
        anyGroupOverride = true;
        collectInvalidTelegramAllowFromEntries({
          entries: allowFrom,
          target: invalidTelegramAllowFromEntries,
        });
      }
      const topics = group.topics;
      if (!topics || typeof topics !== "object") {
        continue;
      }
      for (const topicValue of Object.values(topics as Record<string, unknown>)) {
        if (!topicValue || typeof topicValue !== "object") {
          continue;
        }
        const topic = topicValue as Record<string, unknown>;
        const topicAllow = Array.isArray(topic.allowFrom) ? topic.allowFrom : [];
        if (topicAllow.length > 0) {
          anyGroupOverride = true;
        }
        collectInvalidTelegramAllowFromEntries({
          entries: topicAllow,
          target: invalidTelegramAllowFromEntries,
        });
      }
    }
  }

  const hasAnySenderAllowlist =
    storeAllowFrom.length > 0 || groupAllowFrom.length > 0 || anyGroupOverride;

  if (invalidTelegramAllowFromEntries.size > 0) {
    const examples = Array.from(invalidTelegramAllowFromEntries).slice(0, 5);
    const more =
      invalidTelegramAllowFromEntries.size > examples.length
        ? ` (+${invalidTelegramAllowFromEntries.size - examples.length} more)`
        : "";
    findings.push({
      checkId: "channels.telegram.allowFrom.invalid_entries",
      severity: "warn",
      title: "Telegram allowlist contains non-numeric entries",
      detail:
        "Telegram sender authorization requires numeric Telegram user IDs. " +
        `Found non-numeric allowFrom entries: ${examples.join(", ")}${more}.`,
      remediation:
        "Replace @username entries with numeric Telegram user IDs (use setup to resolve), then re-run the audit.",
    });
  }

  if (storeHasWildcard || groupAllowFromHasWildcard) {
    findings.push({
      checkId: "channels.telegram.groups.allowFrom.wildcard",
      severity: "critical",
      title: "Telegram group allowlist contains wildcard",
      detail:
        'Telegram group sender allowlist contains "*", which allows any group member to run /… commands and control directives.',
      remediation:
        'Remove "*" from channels.telegram.groupAllowFrom and pairing store; prefer explicit numeric Telegram user IDs.',
    });
    return findings;
  }

  if (!hasAnySenderAllowlist) {
    const skillsEnabled = resolveNativeSkillsEnabled({
      providerId: "telegram",
      providerSetting: (telegramCfg.commands as { nativeSkills?: unknown } | undefined)
        ?.nativeSkills as boolean | "auto" | undefined,
      globalSetting: params.cfg.commands?.nativeSkills,
    });
    findings.push({
      checkId: "channels.telegram.groups.allowFrom.missing",
      severity: "critical",
      title: "Telegram group commands have no sender allowlist",
      detail:
        `Telegram group access is enabled but no sender allowlist is configured; this allows any group member to invoke /… commands` +
        (skillsEnabled ? " (including skill commands)." : "."),
      remediation:
        "Approve yourself via pairing (recommended), or set channels.telegram.groupAllowFrom (or per-group groups.<id>.allowFrom).",
    });
  }

  return findings;
}