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package io.dico.parcels2

import io.dico.dicore.Registrator
import io.dico.dicore.command.EOverridePolicy
import io.dico.dicore.command.ICommandDispatcher
import io.dico.parcels2.blockvisitor.TickWorktimeLimiter
import io.dico.parcels2.blockvisitor.WorktimeLimiter
import io.dico.parcels2.command.getParcelCommands
import io.dico.parcels2.defaultimpl.GlobalAddedDataManagerImpl
import io.dico.parcels2.defaultimpl.ParcelProviderImpl
import io.dico.parcels2.listener.ParcelEntityTracker
import io.dico.parcels2.listener.ParcelListeners
import io.dico.parcels2.options.Options
import io.dico.parcels2.options.optionsMapper
import io.dico.parcels2.storage.Storage
import io.dico.parcels2.util.FunctionHelper
import io.dico.parcels2.util.tryCreate
import org.bukkit.Bukkit
import org.bukkit.generator.ChunkGenerator
import org.bukkit.plugin.java.JavaPlugin
import org.slf4j.Logger
import org.slf4j.LoggerFactory
import java.io.File

val logger: Logger = LoggerFactory.getLogger("ParcelsPlugin")
private inline val plogger get() = logger

class ParcelsPlugin : JavaPlugin() {
    lateinit var optionsFile: File; private set
    lateinit var options: Options; private set
    lateinit var parcelProvider: ParcelProvider; private set
    lateinit var storage: Storage; private set
    lateinit var globalAddedData: GlobalAddedDataManager; private set

    val registrator = Registrator(this)
    lateinit var entityTracker: ParcelEntityTracker; private set
    private var listeners: ParcelListeners? = null
    private var cmdDispatcher: ICommandDispatcher? = null

    val functionHelper: FunctionHelper = FunctionHelper(this)
    val worktimeLimiter: WorktimeLimiter by lazy { TickWorktimeLimiter(this, options.tickWorktime) }

    override fun onEnable() {
        plogger.info("Debug enabled: ${plogger.isDebugEnabled}")
        plogger.debug(System.getProperty("user.dir"))
        if (!init()) {
            Bukkit.getPluginManager().disablePlugin(this)
        }
    }

    override fun onDisable() {
        worktimeLimiter.completeAllTasks()
        cmdDispatcher?.unregisterFromCommandMap()
    }

    private fun init(): Boolean {
        optionsFile = File(dataFolder, "options.yml")
        options = Options()
        parcelProvider = ParcelProviderImpl(this)

        try {
            if (!loadOptions()) return false

            try {
                storage = options.storage.newInstance()
                storage.init()
            } catch (ex: Exception) {
                plogger.error("Failed to connect to database", ex)
                return false
            }

            globalAddedData = GlobalAddedDataManagerImpl(this)
            entityTracker = ParcelEntityTracker(parcelProvider)
        } catch (ex: Exception) {
            plogger.error("Error loading options", ex)
            return false
        }

        registerListeners()
        registerCommands()

        parcelProvider.loadWorlds()
        return true
    }

    fun loadOptions(): Boolean {
        when {
            optionsFile.exists() -> optionsMapper.readerForUpdating(options).readValue<Options>(optionsFile)
            else -> run {
                options.addWorld("parcels")
                if (saveOptions()) {
                    plogger.warn("Created options file with a world template. Please review it before next start.")
                } else {
                    plogger.error("Failed to save options file ${optionsFile.canonicalPath}")
                }
                return false
            }
        }
        return true
    }

    fun saveOptions(): Boolean {
        if (optionsFile.tryCreate()) {
            try {
                optionsMapper.writeValue(optionsFile, options)
            } catch (ex: Throwable) {
                optionsFile.delete()
                throw ex
            }
            return true
        }
        return false
    }

    override fun getDefaultWorldGenerator(worldName: String, generatorId: String?): ChunkGenerator? {
        return parcelProvider.getWorldGenerator(worldName)
    }

    private fun registerCommands() {
        cmdDispatcher = getParcelCommands(this).apply {
            registerToCommandMap("parcels:", EOverridePolicy.FALLBACK_ONLY)
        }
    }

    private fun registerListeners() {
        if (listeners == null) {
            listeners = ParcelListeners(parcelProvider, entityTracker)
            registrator.registerListeners(listeners!!)
        }

        functionHelper.scheduleRepeating(100, 5, entityTracker::tick)
    }

}