package bot

import (
	"log"
	"os"
	"strings"

	"github.com/gissleh/irc"
	"git.aiterp.net/rpdata/logbot3/internal/config"
	"git.aiterp.net/rpdata/logbot3/internal/util"
)

func handler(event *irc.Event, client *irc.Client) {
	bot, ok := client.Value(botKey).(*Bot)
	if !ok {
		return
	}

	switch event.Name() {
	// Handle bot loop
	case "hook.ready":
		{
			log.Println("Client is ready!")
			go bot.loop()

			bot.runCommands(config.Get().Commands.OnReady, bot.client.Status(), nil)
		}
	case "client.disconnect":
		{
			log.Println("Client disconnected!")
			bot.stopLoop()

			conf := config.Get().Server
			go bot.Connect(conf.Address, conf.SSL, 0)
		}

	// Log joins and leaves
	case "packet.join":
		{
			if client.Nick() == event.Nick {
				bot.addChannel(event.Arg(0))
			}

			log.Println("(JOIN)", event.Nick, "joined", event.Arg(0))
		}
	case "packet.part":
		{
			log.Println("(PART)", event.Nick, "left", event.Arg(0))
		}
	case "packet.quit":
		{
			log.Println("(QUIT)", event.Nick, "quit")
		}

	case "ctcp.action", "packet.privmsg":
		{
			// The echo-message polyfill will return to sender.
			if event.Nick == bot.client.Nick() {
				break
			}

			// Only continue with channel messages, but log the others.
			channel := event.ChannelTarget()
			if channel == nil {
				if event.Verb() == "action" {
					log.Printf("Message: * %s %s", event.Nick, event.Text)
				} else {
					log.Printf("Message: <%s> %s", event.Nick, event.Text)
				}

				break
			}

			// Parse account, just in case it'll be useful one day.
			account := ""
			if user, ok := bot.client.FindUser(event.Nick); ok {
				account = user.Account
			}

			// Get the kind of psot this is.
			kind := ""
			if strings.HasPrefix(event.Nick, "=") || strings.HasPrefix(event.Nick, "\x1F=") {
				kind = "scene"
			} else if strings.ToLower(event.Verb()) == "action" {
				kind = "action"
			} else {
				kind = "text"
			}

			// Format NPC posts' nick and text.
			nick := event.Nick
			text := event.Text
			if strings.HasPrefix(event.Nick, "\x1F") || kind == "scene" {
				nick = strings.Replace(event.Nick, "\x1F", "", 2)
				text = util.RemoveNPCAttribution(event.Text)
			}

			// Do not dispatch empty messages.
			if len(text) < 1 || len(nick) < 1 || len(kind) < 1 {
				log.Println("Ignoring empty message from:", event.Nick)
				break
			}

			// Dispatch it.
			bot.handlePost(channel.Name(), ChannelPost{
				Account: account,
				Kind:    kind,
				Nick:    nick,
				Time:    event.Time,
				Text:    text,
			})
		}

	// Log notices
	case "packet.notice":
		{
			log.Printf("Message: -%s- %s", event.Nick, event.Text)
		}

	// Log initial numerics for debugging
	case "packet.001", "packet.002", "packet.003", "packet.251", "packet.255", "packet.265", "packet.266", "packet.250", "packet.375", "packet.372", "packet.376":
		{
			log.Printf("(%s) %s\n", event.Verb(), event.Text)
		}
	case "packet.005", "packet.cap", "packet.254":
		{
			log.Printf("(%s) %s %s\n", event.Verb(), strings.Join(event.Args[1:], " "), event.Text)
		}
	case "packet.error":
		{
			log.Printf("(%s) %s\n", event.Verb(), event.Text)
			os.Exit(1)
		}
	}

	// Always log error numerics.
	if len(event.Verb()) == 3 && event.Verb()[0] == '4' || event.Verb()[0] == '9' {
		log.Printf("(%s) %s %s\n", event.Verb(), strings.Join(event.Args, " "), event.Text)
	}
}