// © 2013 the CatBase Authors under the WTFPL. See AUTHORS for the list of authors.

package your

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

	"github.com/velour/catbase/bot"
	"github.com/velour/catbase/bot/msg"
)

type YourPlugin struct {
	bot bot.Bot
}

// NewYourPlugin creates a new YourPlugin with the Plugin interface
func New(bot bot.Bot) *YourPlugin {
	rand.Seed(time.Now().Unix())
	return &YourPlugin{
		bot: bot,
	}
}

// Message responds to the bot hook on recieving messages.
// This function returns true if the plugin responds in a meaningful way to the users message.
// Otherwise, the function returns false and the bot continues execution of other plugins.
func (p *YourPlugin) Message(message msg.Message) bool {
	lower := strings.ToLower(message.Body)
	config := p.bot.Config().Your
	if len(message.Body) > config.MaxLength {
		return false
	}

	if strings.Contains(message.Body, "the fucking") { // let's not mess with case
		log.Println("Found a fucking")
		if rand.Float64() < config.FuckingChance {
			log.Println("Replacing a fucking")
			r := strings.NewReplacer("the fucking", "fucking the")
			msg := r.Replace(message.Body)
			p.bot.SendMessage(message.Channel, msg)
			return true
		}
	}
	if strings.Contains(message.Body, "ducking") || strings.Contains(message.Body, "fucking") { // let's not mess with case
		log.Println("Found a fucking|ducking")
		if rand.Float64() < config.DuckingChance {
			log.Println("Replacing a ducking")
			r := strings.NewReplacer("fucking", "ducking", "ducking", "fucking")
			msg := r.Replace(message.Body)
			p.bot.SendMessage(message.Channel, msg)
			return true
		}
	}
	if strings.Contains(lower, "your") || strings.Contains(lower, "you're") {
		if rand.Float64() < config.YourChance {
			r := strings.NewReplacer("Your", "You're", "your", "you're", "You're",
				"Your", "you're", "your", "Youre", "Your", "youre", "your")
			msg := r.Replace(message.Body)
			p.bot.SendMessage(message.Channel, msg)
			return true
		}
	}
	if strings.Contains(message.Body, " is ") {
		log.Println("Found an is")
		if rand.Float64() < config.NegativeChance {
			log.Println("Replacing an is")
			r := strings.NewReplacer(" is ", " is not ")
			msg := r.Replace(message.Body)
			p.bot.SendMessage(message.Channel, msg)
			return true
		}
	}
	if strings.Contains(message.Body, " are ") {
		log.Println("Found an are")
		if rand.Float64() < config.NegativeChance {
			log.Println("Replacing an are")
			r := strings.NewReplacer(" are ", " are not ")
			msg := r.Replace(message.Body)
			p.bot.SendMessage(message.Channel, msg)
			return true
		}
	}
	return false
}

// Help responds to help requests. Every plugin must implement a help function.
func (p *YourPlugin) Help(channel string, parts []string) {
	p.bot.SendMessage(channel, "Your corrects people's grammar.")
}

// Empty event handler because this plugin does not do anything on event recv
func (p *YourPlugin) Event(kind string, message msg.Message) bool {
	return false
}

// Handler for bot's own messages
func (p *YourPlugin) BotMessage(message msg.Message) bool {
	return false
}

// Register any web URLs desired
func (p *YourPlugin) RegisterWeb() *string {
	return nil
}