import type { ChannelGroupContext } from "openclaw/plugin-sdk/channel-contract";
import {
  resolveChannelGroupRequireMention,
  resolveChannelGroupToolsPolicy,
  type GroupToolPolicyConfig,
} from "openclaw/plugin-sdk/channel-policy";

function parseTelegramGroupId(value?: string | null) {
  const raw = value?.trim() ?? "";
  if (!raw) {
    return { chatId: undefined, topicId: undefined };
  }
  const parts = raw.split(":").filter(Boolean);
  if (
    parts.length >= 3 &&
    parts[1] === "topic" &&
    /^-?\d+$/.test(parts[0]) &&
    /^\d+$/.test(parts[2])
  ) {
    return { chatId: parts[0], topicId: parts[2] };
  }
  if (parts.length >= 2 && /^-?\d+$/.test(parts[0]) && /^\d+$/.test(parts[1])) {
    return { chatId: parts[0], topicId: parts[1] };
  }
  return { chatId: raw, topicId: undefined };
}

function resolveTelegramRequireMention(params: {
  cfg: ChannelGroupContext["cfg"];
  chatId?: string;
  topicId?: string;
}): boolean | undefined {
  const { cfg, chatId, topicId } = params;
  if (!chatId) {
    return undefined;
  }
  const groupConfig = cfg.channels?.telegram?.groups?.[chatId];
  const groupDefault = cfg.channels?.telegram?.groups?.["*"];
  const topicConfig = topicId && groupConfig?.topics ? groupConfig.topics[topicId] : undefined;
  const defaultTopicConfig =
    topicId && groupDefault?.topics ? groupDefault.topics[topicId] : undefined;
  if (typeof topicConfig?.requireMention === "boolean") {
    return topicConfig.requireMention;
  }
  if (typeof defaultTopicConfig?.requireMention === "boolean") {
    return defaultTopicConfig.requireMention;
  }
  if (typeof groupConfig?.requireMention === "boolean") {
    return groupConfig.requireMention;
  }
  if (typeof groupDefault?.requireMention === "boolean") {
    return groupDefault.requireMention;
  }
  return undefined;
}

export function resolveTelegramGroupRequireMention(
  params: ChannelGroupContext,
): boolean | undefined {
  const { chatId, topicId } = parseTelegramGroupId(params.groupId);
  const requireMention = resolveTelegramRequireMention({
    cfg: params.cfg,
    chatId,
    topicId,
  });
  if (typeof requireMention === "boolean") {
    return requireMention;
  }
  return resolveChannelGroupRequireMention({
    cfg: params.cfg,
    channel: "telegram",
    groupId: chatId ?? params.groupId,
    accountId: params.accountId,
  });
}

export function resolveTelegramGroupToolPolicy(
  params: ChannelGroupContext,
): GroupToolPolicyConfig | undefined {
  const { chatId } = parseTelegramGroupId(params.groupId);
  return resolveChannelGroupToolsPolicy({
    cfg: params.cfg,
    channel: "telegram",
    groupId: chatId ?? params.groupId,
    accountId: params.accountId,
    senderId: params.senderId,
    senderName: params.senderName,
    senderUsername: params.senderUsername,
    senderE164: params.senderE164,
  });
}