import { Bot } from "https://deno.land/x/grammy@v1.36.1/mod.ts";
import { TELEGRAM_API_KEY } from "@lib/env.ts";
import { createLogger } from "./log/index.ts";

const bot = new Bot(TELEGRAM_API_KEY);
const log = createLogger("telegram");

import * as manager from "./taskManager.ts";

async function downloadFile(filePath: string): Promise<Uint8Array> {
  log.info(`Downloading file from path: ${filePath}`);
  const url = `https://api.telegram.org/file/bot${bot.token}/${filePath}`;
  const response = await fetch(url);
  if (!response.ok) {
    throw new Error("Failed to download file: " + response.statusText);
  }
  log.info("File downloaded successfully");
  const buffer = await response.arrayBuffer();
  return new Uint8Array(buffer);
}

bot.command("start", async (ctx) => {
  log.info("Received /start command");
  const [_, noteName] = ctx.message?.text?.split(" ") || [];
  if (!noteName) {
    return ctx.reply("Please provide a note name. Usage: /start NoteName");
  }
  manager.startTask(ctx.chat.id.toString(), noteName);
  await ctx.reply(`Started note: ${noteName}`);
});

bot.command("end", async (ctx) => {
  log.info("Received /end command");
  const finalNote = await manager.endTask(ctx.chat.id.toString());
  if (!finalNote) return ctx.reply("No active note found.");

  try {
    await ctx.reply("Note complete. Here is your markdown:");
    await ctx.reply(finalNote, { parse_mode: "MarkdownV2" });
  } catch (err) {
    console.error("Error sending final note:", err);
  }
});

bot.on("message:text", (ctx) => {
  log.info("Received text message");
  manager.addTextEntry(ctx.chat.id.toString(), ctx.message.text);
});

bot.on("message:voice", async (ctx) => {
  log.info("Received photo message");
  log.info("Received voice message");
  const file = await ctx.getFile();
  const buffer = await downloadFile(file.file_path!);
  manager.addVoiceEntry(ctx.chat.id.toString(), buffer.buffer);
});

bot.on("message:photo", async (ctx) => {
  const file = await ctx.getFile();
  const buffer = await downloadFile(file.file_path!);
  const fileName = file.file_path!.split("/").pop()!;
  manager.addPhotoEntry(ctx.chat.id.toString(), buffer.buffer, fileName);
});

bot.start();