HexBot/src/main/kotlin/com/chameth/hexbot/Hexbot.kt

package com.chameth.hexbot

import com.chameth.hexbot.modules.Hue
import com.chameth.hexbot.modules.Module
import com.dmdirc.ktirc.IrcClient
import com.dmdirc.ktirc.events.IrcEvent
import com.dmdirc.ktirc.events.ServerDisconnected
import com.dmdirc.ktirc.events.ServerReady
import com.dmdirc.ktirc.messages.sendJoin
import com.ufoscout.properlty.Properlty
import com.ufoscout.properlty.reader.EnvironmentVariablesReader
import com.ufoscout.properlty.reader.PropertiesResourceReader
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.launch
import kotlinx.coroutines.runBlocking
import org.jetbrains.exposed.sql.Database
import java.util.logging.Level
import java.util.logging.LogManager

class HexBot(private val config: Properlty, availableModules: List<Module>) {

    private var client: IrcClient? = null

    private val channels
        get() = config.getArray("irc.channels")

    private val modules = availableModules.filter { it.init(config) }

    fun connect() {
        with (IrcClient {
            server {
                host = config["irc.server"].orElseThrow { IllegalStateException("irc.server not configured") }
                port = config.getInt("irc.port").orElseThrow { IllegalStateException("irc.port not configured") }
                useTls = config.getBoolean("irc.tls", false)
                password = config["irc.password", null]
            }

            profile {
                nickname = config["irc.nickname", "Hex"]
                realName = config["irc.realname", "+++Divide By Cucumber Error+++"]
                username = config["irc.ident", "hexbot"]
            }

            sasl {
                username = config["irc.nickserv.user", null]
                password = config["irc.nickserv.password", null]
            }
        }) {
            client = this
            onEvent {
                handleEvent(this, it)
            }
            connect()
        }
    }

    private fun handleEvent(client: IrcClient, event: IrcEvent) {
        when (event) {
            is ServerReady -> joinChannels()
            is ServerDisconnected -> client.connect()
        }
        for (module in modules) {
            GlobalScope.launch(Dispatchers.IO) {
                module.processEvent(client, event)
            }
        }
    }

    private fun joinChannels() {
        channels.forEach { client?.sendJoin(it) }
    }

}

internal fun loadConfig(): Properlty = Properlty
        .builder()
        .caseSensitive(false)
        .add(PropertiesResourceReader.build("./hexbot.properties").ignoreNotFound(true))
        .add(EnvironmentVariablesReader().replace("HEXBOT_", "").replace("_", "."))
        .build()

fun main() = runBlocking<Unit> {
    val rootLogger = LogManager.getLogManager().getLogger("")
    rootLogger.level = Level.FINEST
    for (h in rootLogger.handlers) {
        h.level = Level.FINEST
    }

    Database.connect("jdbc:sqlite:data.db", "org.sqlite.JDBC")

    val bot = HexBot(loadConfig(), listOf(Hue()))
    bot.connect()
    readLine()
}