package fun

import (
	"math/rand"
	"strings"
	"time"

	"git.nakama.town/fmartingr/butterrobot/internal/model"
	"git.nakama.town/fmartingr/butterrobot/internal/plugin"
)

// CoinPlugin flips a coin
type CoinPlugin struct {
	plugin.BasePlugin
	rand *rand.Rand
}

// NewCoin creates a new CoinPlugin instance
func NewCoin() *CoinPlugin {
	source := rand.NewSource(time.Now().UnixNano())
	return &CoinPlugin{
		BasePlugin: plugin.BasePlugin{
			ID:   "fun.coin",
			Name: "Coin Flip",
			Help: "Flips a coin when you type 'flip a coin'",
		},
		rand: rand.New(source),
	}
}

// OnMessage handles incoming messages
func (p *CoinPlugin) OnMessage(msg *model.Message, config map[string]interface{}) []*model.Message {
	if !strings.Contains(strings.ToLower(msg.Text), "flip a coin") {
		return nil
	}

	result := "Heads"
	if p.rand.Intn(2) == 0 {
		result = "Tails"
	}

	response := &model.Message{
		Text:    result,
		Chat:    msg.Chat,
		ReplyTo: msg.ID,
		Channel: msg.Channel,
	}

	return []*model.Message{response}
}