package commands

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

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

type FortuneCommand struct{}

func (f FortuneCommand) Name() string {
	return "fortune"
}

func (f FortuneCommand) Help() string {
	return "Get your fortune. Usage: /fortune"
}

func (f FortuneCommand) Execute(update tgbotapi.Update, bot *tgbotapi.BotAPI) {
	fortune, err := getRandomFortune()
	if err != nil {
		log.Printf("Error getting fortune: %v", err)
		msg := tgbotapi.NewMessage(update.Message.Chat.ID, "❌ Error loading fortune database. Please try again later.")
		bot.Send(msg)
		return
	}

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

func getRandomFortune() (string, error) {
	// Try current json directory first, then fallback to old_json
	file, err := os.Open("json/fortune.json")
	if err != nil {
		// Try old_json directory
		file, err = os.Open("old_json/fortune.json")
		if err != nil {
			return "", fmt.Errorf("failed to open fortune.json: %v", err)
		}
	}
	defer file.Close()

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

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

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

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

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

func init() {
	Register(FortuneCommand{})
}