package zorg.esinia.server.events;

import java.time.Duration;
import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

import org.spongepowered.api.Sponge;
import org.spongepowered.api.block.BlockSnapshot;
import org.spongepowered.api.event.Listener;
import org.spongepowered.api.event.cause.Cause;
import org.spongepowered.api.event.game.state.GameStartedServerEvent;
import org.spongepowered.api.scheduler.Task;
import org.spongepowered.api.world.Location;
import org.spongepowered.api.world.World;

import com.flowpowered.math.vector.Vector3i;

import zorg.esinia.server.Esinia;
import zorg.esinia.server.Config;
import zorg.esinia.server.Config.RespawnBlocksEntry;

public class EventServerStart {
	private Esinia plugin;
	public Config config;
	public EventServerStart(Esinia plugin) {
		this.plugin = plugin;
		this.config = plugin.config;
	}

	@Listener
	public void onServerStart(GameStartedServerEvent event) {
		DateTimeFormatter formatter =
				DateTimeFormatter.ofLocalizedDateTime(FormatStyle.LONG)
				.withLocale(Locale.US)
				.withZone(ZoneId.systemDefault());
		plugin.getLogger().info("EventServerStart: starting respawn blocks timer.");
		Task.builder()
		.delay(2, TimeUnit.SECONDS)
		.interval(2, TimeUnit.SECONDS)
		.execute(() -> {
			plugin.getLogger().info("EventServerStart: timer: Beep");
			if (config.respawnBlocks != null && !config.respawnBlocks.isEmpty()) {
				plugin.getLogger().info("EventServerStart: timer: respawnBlocks is not null");
				List<RespawnBlocksEntry> blocks = config.respawnBlocks;
				Iterator<RespawnBlocksEntry> iter = blocks.iterator();
				Instant instant = Instant.now();
				for (RespawnBlocksEntry block : (Iterable<RespawnBlocksEntry>) () -> iter) {
					plugin.getLogger().info("EventServerStart: timer: interating through a block.");
					String then_ = block.time;
					Instant then = (Instant) formatter.parse(then_, Instant::from);
					Duration timeElapsed = Duration.between(then, instant);
					plugin.getLogger().info("EventServerStart: timer: duration: " + timeElapsed.getSeconds());
					if(block.timer <= timeElapsed.getSeconds()) {
						plugin.getLogger().info("EventServerStart: timer: block needs a respawn.");
						BlockSnapshot blockShot = block.snapshot;
						Vector3i blockVector3i = blockShot.getPosition();
						UUID blockworldUUID = blockShot.getWorldUniqueId();
						for (World world : Sponge.getGame().getServer().getWorlds()) {
							if (blockworldUUID.equals(world.getUniqueId())) {
								Location<World> blockLocation = new Location<World>(world, blockVector3i);
								blockLocation.setBlock(block.snapshot.getState(), Cause.source(plugin).build());
								iter.remove();
							}
						}
					}
				}
				plugin.saveConfig();
			}

		})
		.submit(plugin);
	}
}