import crypto from "node:crypto";

import { resolveBlueBubblesAccount } from "./accounts.js";
import { parseBlueBubblesTarget, normalizeBlueBubblesHandle } from "./targets.js";
import type { ClawdbotConfig } from "clawdbot/plugin-sdk";
import {
  blueBubblesFetchWithTimeout,
  buildBlueBubblesApiUrl,
  type BlueBubblesSendTarget,
} from "./types.js";

export type BlueBubblesSendOpts = {
  serverUrl?: string;
  password?: string;
  accountId?: string;
  timeoutMs?: number;
  cfg?: ClawdbotConfig;
};

export type BlueBubblesSendResult = {
  messageId: string;
};

function resolveSendTarget(raw: string): BlueBubblesSendTarget {
  const parsed = parseBlueBubblesTarget(raw);
  if (parsed.kind === "handle") {
    return {
      kind: "handle",
      address: normalizeBlueBubblesHandle(parsed.to),
      service: parsed.service,
    };
  }
  if (parsed.kind === "chat_id") {
    return { kind: "chat_id", chatId: parsed.chatId };
  }
  if (parsed.kind === "chat_guid") {
    return { kind: "chat_guid", chatGuid: parsed.chatGuid };
  }
  return { kind: "chat_identifier", chatIdentifier: parsed.chatIdentifier };
}

function extractMessageId(payload: unknown): string {
  if (!payload || typeof payload !== "object") return "unknown";
  const record = payload as Record<string, unknown>;
  const data = record.data && typeof record.data === "object" ? (record.data as Record<string, unknown>) : null;
  const candidates = [
    record.messageId,
    record.guid,
    record.id,
    data?.messageId,
    data?.guid,
    data?.id,
  ];
  for (const candidate of candidates) {
    if (typeof candidate === "string" && candidate.trim()) return candidate.trim();
    if (typeof candidate === "number" && Number.isFinite(candidate)) return String(candidate);
  }
  return "unknown";
}

type BlueBubblesChatRecord = Record<string, unknown>;

function extractChatGuid(chat: BlueBubblesChatRecord): string | null {
  const candidates = [
    chat.chatGuid,
    chat.guid,
    chat.chat_guid,
    chat.identifier,
    chat.chatIdentifier,
    chat.chat_identifier,
  ];
  for (const candidate of candidates) {
    if (typeof candidate === "string" && candidate.trim()) return candidate.trim();
  }
  return null;
}

function extractChatId(chat: BlueBubblesChatRecord): number | null {
  const candidates = [chat.chatId, chat.id, chat.chat_id];
  for (const candidate of candidates) {
    if (typeof candidate === "number" && Number.isFinite(candidate)) return candidate;
  }
  return null;
}

function extractParticipantAddresses(chat: BlueBubblesChatRecord): string[] {
  const raw =
    (Array.isArray(chat.participants) ? chat.participants : null) ??
    (Array.isArray(chat.handles) ? chat.handles : null) ??
    (Array.isArray(chat.participantHandles) ? chat.participantHandles : null);
  if (!raw) return [];
  const out: string[] = [];
  for (const entry of raw) {
    if (typeof entry === "string") {
      out.push(entry);
      continue;
    }
    if (entry && typeof entry === "object") {
      const record = entry as Record<string, unknown>;
      const candidate =
        (typeof record.address === "string" && record.address) ||
        (typeof record.handle === "string" && record.handle) ||
        (typeof record.id === "string" && record.id) ||
        (typeof record.identifier === "string" && record.identifier);
      if (candidate) out.push(candidate);
    }
  }
  return out;
}

async function queryChats(params: {
  baseUrl: string;
  password: string;
  timeoutMs?: number;
  offset: number;
  limit: number;
}): Promise<BlueBubblesChatRecord[]> {
  const url = buildBlueBubblesApiUrl({
    baseUrl: params.baseUrl,
    path: "/api/v1/chat/query",
    password: params.password,
  });
  const res = await blueBubblesFetchWithTimeout(
    url,
    {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        limit: params.limit,
        offset: params.offset,
        with: ["participants"],
      }),
    },
    params.timeoutMs,
  );
  if (!res.ok) return [];
  const payload = (await res.json().catch(() => null)) as Record<string, unknown> | null;
  const data = payload && typeof payload.data !== "undefined" ? (payload.data as unknown) : null;
  return Array.isArray(data) ? (data as BlueBubblesChatRecord[]) : [];
}

export async function resolveChatGuidForTarget(params: {
  baseUrl: string;
  password: string;
  timeoutMs?: number;
  target: BlueBubblesSendTarget;
}): Promise<string | null> {
  if (params.target.kind === "chat_guid") return params.target.chatGuid;

  const normalizedHandle =
    params.target.kind === "handle" ? normalizeBlueBubblesHandle(params.target.address) : "";
  const targetChatId = params.target.kind === "chat_id" ? params.target.chatId : null;
  const targetChatIdentifier =
    params.target.kind === "chat_identifier" ? params.target.chatIdentifier : null;

  const limit = 500;
  for (let offset = 0; offset < 5000; offset += limit) {
    const chats = await queryChats({
      baseUrl: params.baseUrl,
      password: params.password,
      timeoutMs: params.timeoutMs,
      offset,
      limit,
    });
    if (chats.length === 0) break;
    for (const chat of chats) {
      if (targetChatId != null) {
        const chatId = extractChatId(chat);
        if (chatId != null && chatId === targetChatId) {
          return extractChatGuid(chat);
        }
      }
      if (targetChatIdentifier) {
        const guid = extractChatGuid(chat);
        if (guid && guid === targetChatIdentifier) return guid;
        const identifier =
          typeof chat.identifier === "string"
            ? chat.identifier
            : typeof chat.chatIdentifier === "string"
              ? chat.chatIdentifier
              : typeof chat.chat_identifier === "string"
                ? chat.chat_identifier
                : "";
        if (identifier && identifier === targetChatIdentifier) return extractChatGuid(chat);
      }
      if (normalizedHandle) {
        const participants = extractParticipantAddresses(chat).map((entry) =>
          normalizeBlueBubblesHandle(entry),
        );
        if (participants.includes(normalizedHandle)) {
          return extractChatGuid(chat);
        }
      }
    }
  }
  return null;
}

export async function sendMessageBlueBubbles(
  to: string,
  text: string,
  opts: BlueBubblesSendOpts = {},
): Promise<BlueBubblesSendResult> {
  const trimmedText = text ?? "";
  if (!trimmedText.trim()) {
    throw new Error("BlueBubbles send requires text");
  }

  const account = resolveBlueBubblesAccount({
    cfg: opts.cfg ?? {},
    accountId: opts.accountId,
  });
  const baseUrl = opts.serverUrl?.trim() || account.config.serverUrl?.trim();
  const password = opts.password?.trim() || account.config.password?.trim();
  if (!baseUrl) throw new Error("BlueBubbles serverUrl is required");
  if (!password) throw new Error("BlueBubbles password is required");

  const target = resolveSendTarget(to);
  const chatGuid = await resolveChatGuidForTarget({
    baseUrl,
    password,
    timeoutMs: opts.timeoutMs,
    target,
  });
  if (!chatGuid) {
    throw new Error(
      "BlueBubbles send failed: chatGuid not found for target. Use a chat_guid target or ensure the chat exists.",
    );
  }
  const payload: Record<string, unknown> = {
    chatGuid,
    tempGuid: crypto.randomUUID(),
    message: trimmedText,
    method: "apple-script",
  };

  const url = buildBlueBubblesApiUrl({
    baseUrl,
    path: "/api/v1/message/text",
    password,
  });
  const res = await blueBubblesFetchWithTimeout(
    url,
    {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(payload),
    },
    opts.timeoutMs,
  );
  if (!res.ok) {
    const errorText = await res.text();
    throw new Error(`BlueBubbles send failed (${res.status}): ${errorText || "unknown"}`);
  }
  const body = await res.text();
  if (!body) return { messageId: "ok" };
  try {
    const parsed = JSON.parse(body) as unknown;
    return { messageId: extractMessageId(parsed) };
  } catch {
    return { messageId: "ok" };
  }
}