package nl.voidcorp.discord.events

import net.dv8tion.jda.api.EmbedBuilder
import net.dv8tion.jda.api.events.message.guild.GuildMessageDeleteEvent
import net.dv8tion.jda.api.events.message.guild.GuildMessageReceivedEvent
import net.dv8tion.jda.api.events.message.guild.GuildMessageUpdateEvent
import net.dv8tion.jda.api.hooks.ListenerAdapter
import nl.voidcorp.discord.jda
import nl.voidcorp.discord.storage.GuildRepo
import nl.voidcorp.discord.storage.GuildStore
import nl.voidcorp.discord.storage.MessageRepo
import nl.voidcorp.discord.storage.MessageStore
import java.awt.Color
import java.time.Clock
import java.time.LocalDateTime

class LogListener(val repo: GuildRepo, val msg: MessageRepo) : ListenerAdapter() {

    private enum class EventType {
        EDIT,
        DELET
    }

    override fun onGuildMessageReceived(event: GuildMessageReceivedEvent) {
        msg.save(MessageStore(event.messageIdLong, event.message.contentRaw, event.guild.idLong, event.author.idLong))
    }

    override fun onGuildMessageUpdate(event: GuildMessageUpdateEvent) {
        val past = msg.findByMsgId(event.messageIdLong) ?: MessageStore(
            event.messageIdLong,
            event.message.contentRaw,
            event.guild.idLong,
            event.author.idLong
        )
        if (event.message.contentRaw != past.text) {
            past.past.add(past.text)
            past.text = event.message.contentRaw
        }
        msg.save(past)
        sendMessageModification(past, EventType.EDIT)
    }

    override fun onGuildMessageDelete(event: GuildMessageDeleteEvent) {
        val past =
            msg.findByMsgId(event.messageIdLong) ?: MessageStore(
                event.messageIdLong,
                "~~deleted~~",
                event.guild.idLong,
                -1
            )
        past.deleted = true
        msg.save(past)
        sendMessageModification(past, EventType.DELET)
    }

    private fun sendMessageModification(st: MessageStore, type: EventType) {
        val store = repo.findByGuildId(st.guildId) ?: GuildStore(st.guildId)
        if (store.loggingChannel != null) {
            val embedBuilder = EmbedBuilder().addField("Message", st.text, false)
                .addField("Past", st.past.joinToString("\n"), true)
                .addField("Sender", jda.getUserById(st.authorId)?.asTag ?: "someone#-1", true)
                .setTitle(type.toString()).setTimestamp(LocalDateTime.now(Clock.systemUTC()))
                .setColor(if (type == EventType.EDIT) Color.GREEN.brighter() else Color.RED.darker())
            jda.getTextChannelById(store.loggingChannel ?: -1)?.sendMessage(embedBuilder.build())?.queue()
        }
        msg.deleteInBatch(msg.findByNowBefore(LocalDateTime.now().minusDays(2)))
    }
}