package commands

import (
	"encoding/json"
	"fmt"
	"io"
	"log"
	"math/rand"
	"os"
	"time"

	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
)

type TrollCommand struct{}

func (t TrollCommand) Name() string {
	return "troll"
}

func (t TrollCommand) Help() string {
	return "Get a random troll message from the database. Usage: /troll"
}

func (t TrollCommand) Execute(update tgbotapi.Update, bot *tgbotapi.BotAPI) {
	// Send "typing" action
	typingAction := tgbotapi.NewChatAction(update.Message.Chat.ID, tgbotapi.ChatTyping)
	bot.Send(typingAction)

	trollMessage, err := getRandomTrollMessage()
	if err != nil {
		log.Printf("Error getting troll message: %v", err)
		msg := tgbotapi.NewMessage(update.Message.Chat.ID, "❌ Error loading troll database. Please try again later.")
		bot.Send(msg)
		return
	}

	// Limit message length for Telegram (max 4096 characters)
	if len(trollMessage) > 4000 {
		trollMessage = trollMessage[:3997] + "..."
	}

	msg := tgbotapi.NewMessage(update.Message.Chat.ID, trollMessage)
	bot.Send(msg)
}

func getRandomTrollMessage() (string, error) {
	// Open the troll database file
	file, err := os.Open("json/trolldb.json")
	if err != nil {
		return "", fmt.Errorf("failed to open trolldb.json: %v", err)
	}
	defer file.Close()

	// Read the file content
	data, err := io.ReadAll(file)
	if err != nil {
		return "", fmt.Errorf("failed to read trolldb.json: %v", err)
	}

	// Parse JSON array
	var trollMessages []string
	if err := json.Unmarshal(data, &trollMessages); err != nil {
		return "", fmt.Errorf("failed to parse trolldb.json: %v", err)
	}

	if len(trollMessages) == 0 {
		return "", fmt.Errorf("troll database is empty")
	}

	// Seed random number generator
	rand.Seed(time.Now().UnixNano())

	// Pick a random message
	randomIndex := rand.Intn(len(trollMessages))
	return trollMessages[randomIndex], nil
}

func init() {
	Register(TrollCommand{})
}