import { Bot, Context } from "grammy";
import { conversations, createConversation, ConversationFlavor, VersionedStateStorage } from "@grammyjs/conversations";
import { KvAdapter } from "@grammyjs/storage-cloudflare";
import { handleStartCommand } from "./handlers/start";
import { handleInteractiveLogin } from "./handlers/login";
import { handleEventsCommand } from "./handlers/events";
import { handleEventDetails } from "./handlers/eventDetails";
import { handleBookEvent } from "./handlers/bookEvent";
import { handleHistoryCommand } from "./handlers/history";
import { handleCancelCommand, handleCancelConfirmation } from "./handlers/cancel";
import { handleLogoutCommand } from "./handlers/logout";

export interface Env {
  BOT_INFO: string;
  BOT_TOKEN: string;
  COSMOE_CREDENTIALS: KVNamespace;
  COSMOE_STORAGE: KVNamespace;
}

export function setupCommands(bot: Bot<ConversationFlavor<Context>>, env: Env) {
  // Create a KV adapter for conversation storage using COSMOE_STORAGE namespace
  const kvAdapter = new KvAdapter(env.COSMOE_STORAGE);
  
  // Define conversation storage using the KV adapter
  const conversationStorage = {
    read: async (key: string) => {
      try {
        const value = await kvAdapter.read(key);
        return value ? JSON.parse(value as string) : undefined;
      } catch (error) {
        console.error('Error reading conversation from KV:', error);
        return undefined;
      }
    },
    write: async (key: string, value: any) => {
      try {
        await kvAdapter.write(key, JSON.stringify(value));
      } catch (error) {
        console.error('Error writing conversation to KV:', error);
      }
    },
    delete: async (key: string) => {
      try {
        await kvAdapter.delete(key);
      } catch (error) {
        console.error('Error deleting conversation from KV:', error);
      }
    },
  };
  
  // Install the conversations plugin with KV storage
  bot.use(conversations({ storage: conversationStorage }));
  
  // Create the login conversation, with environment bound to the handler
  bot.use(createConversation(async (conversation, ctx) => {
    await handleInteractiveLogin(conversation, ctx, env);
  }, "login"));

  bot.command("start", async (ctx: Context) => {
    await handleStartCommand(ctx);
  });

  // Use the interactive conversation for login
  bot.command("login", async (ctx) => {
    await ctx.conversation.enter("login");
  });

  bot.command("events", async (ctx: Context) => {
    await handleEventsCommand(ctx);
  });

  // Handle /event_123 format using hears
  bot.hears(/^\/event_(.+)$/, async (ctx) => {
    await handleEventDetails(ctx);
  });

  // Handle /book_{event_id}_{slot_id} format
  bot.hears(/^\/book_(\d+)_(\d+)$/, async (ctx) => {
    await handleBookEvent(ctx, env);
  });

  bot.command("history", async (ctx: Context) => {
    await handleHistoryCommand(ctx, env);
  });

  // Handle /cancel_{booking_id} format
  bot.hears(/^\/cancel_(\d+)$/, async (ctx) => {
    await handleCancelCommand(ctx, env);
  });

  // Handle callback queries for cancel confirmation
  bot.callbackQuery(/confirm_cancel_\d+|cancel_action/, async (ctx) => {
    if (ctx.callbackQuery.data) {
      await handleCancelConfirmation(ctx, env, ctx.callbackQuery.data);
      await ctx.answerCallbackQuery();
    }
  });

  bot.command("logout", async (ctx: Context) => {
    await handleLogoutCommand(ctx, env);
  });
}