package us.tss3.blockparty.config;

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.plugin.Plugin;
import us.tss3.blockparty.logic.ArenaConfigValidator;
import us.tss3.blockparty.util.LocationUtil;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;

/** Loads/saves individual arena yml files. Each arena is loaded independently; a bad file is logged and skipped. */
public class ArenaConfigLoader {

    private final Plugin plugin;
    private final File arenasFolder;

    public ArenaConfigLoader(Plugin plugin) {
        this.plugin = plugin;
        this.arenasFolder = new File(plugin.getDataFolder(), "arenas");
        if (!arenasFolder.exists()) {
            arenasFolder.mkdirs();
        }
    }

    public File getArenasFolder() {
        return arenasFolder;
    }

    public List<ArenaConfig> loadAll() {
        List<ArenaConfig> arenas = new ArrayList<>();
        File[] files = arenasFolder.listFiles((dir, name) -> name.endsWith(".yml"));
        if (files == null) {
            return arenas;
        }
        for (File file : files) {
            try {
                ArenaConfig cfg = load(file);
                if (cfg != null) {
                    arenas.add(cfg);
                }
            } catch (Exception ex) {
                plugin.getLogger().log(Level.WARNING, "Failed to load arena file " + file.getName() + ": " + ex.getMessage(), ex);
            }
        }
        return arenas;
    }

    public ArenaConfig load(File file) {
        String name = file.getName().replace(".yml", "");
        YamlConfiguration yml = YamlConfiguration.loadConfiguration(file);
        ArenaConfig cfg = new ArenaConfig(name);
        cfg.setWorldName(yml.getString("world"));
        cfg.setLobby(LocationUtil.fromSection(yml.getConfigurationSection("lobby")));
        cfg.setSpawn(LocationUtil.fromSection(yml.getConfigurationSection("spawn")));
        cfg.setSpectator(LocationUtil.fromSection(yml.getConfigurationSection("spectator")));
        cfg.setBillboard(LocationUtil.fromSection(yml.getConfigurationSection("billboard")));
        cfg.setBillboardEnabled(yml.getBoolean("billboard-enabled", true));
        if (yml.contains("pos1")) {
            cfg.setPos1(new int[]{yml.getInt("pos1.x"), yml.getInt("pos1.y"), yml.getInt("pos1.z")});
        }
        if (yml.contains("pos2")) {
            cfg.setPos2(new int[]{yml.getInt("pos2.x"), yml.getInt("pos2.y"), yml.getInt("pos2.z")});
        }
        cfg.setMinPlayers(yml.getInt("min-players", 2));
        cfg.setMaxPlayers(yml.getInt("max-players", 16));
        cfg.setCountdownDuration(yml.getInt("countdown-duration", 15));
        cfg.setRoundPrepDuration(yml.getInt("round-prep-duration", 5));
        cfg.setFloorRemoveDelaySeconds(yml.getInt("floor-remove-delay", 1));
        cfg.setFloorRestoreDelaySeconds(yml.getInt("floor-restore-delay", 3));
        cfg.setStartingRoundTime(yml.getInt("starting-round-time", 20));
        cfg.setMinimumRoundTime(yml.getInt("minimum-round-time", 4));
        cfg.setRoundTimeReduction(yml.getInt("round-time-reduction", 1));
        cfg.setWinEndingDelaySeconds(yml.getInt("win-ending-delay", 6));
        cfg.setAllowJoinWhileStarting(yml.getBoolean("allow-join-while-waiting", true));
        cfg.setSpectatorsAllowed(yml.getBoolean("spectators-allowed", true));
        cfg.setEnabled(yml.getBoolean("enabled", false));

        List<Material> materials = new ArrayList<>();
        for (String matName : yml.getStringList("floor-materials")) {
            Material mat = Material.matchMaterial(matName);
            if (mat == null) {
                plugin.getLogger().warning("Arena '" + name + "': invalid floor material '" + matName + "' skipped.");
                continue;
            }
            materials.add(mat);
        }
        cfg.setFloorMaterials(materials);
        cfg.setGeneratedLayout(yml.getStringList("generated-layout"));
        return cfg;
    }

    public void save(ArenaConfig cfg) {
        File file = new File(arenasFolder, cfg.getName() + ".yml");
        YamlConfiguration yml = new YamlConfiguration();
        if (cfg.getWorldName() != null) {
            yml.set("world", cfg.getWorldName());
        }
        if (cfg.getLobby() != null) {
            LocationUtil.toSection(yml.createSection("lobby"), cfg.getLobby());
        }
        if (cfg.getSpawn() != null) {
            LocationUtil.toSection(yml.createSection("spawn"), cfg.getSpawn());
        }
        if (cfg.getSpectator() != null) {
            LocationUtil.toSection(yml.createSection("spectator"), cfg.getSpectator());
        }
        if (cfg.getBillboard() != null) {
            LocationUtil.toSection(yml.createSection("billboard"), cfg.getBillboard());
        }
        yml.set("billboard-enabled", cfg.isBillboardEnabled());
        if (cfg.getPos1() != null) {
            yml.set("pos1.x", cfg.getPos1()[0]);
            yml.set("pos1.y", cfg.getPos1()[1]);
            yml.set("pos1.z", cfg.getPos1()[2]);
        }
        if (cfg.getPos2() != null) {
            yml.set("pos2.x", cfg.getPos2()[0]);
            yml.set("pos2.y", cfg.getPos2()[1]);
            yml.set("pos2.z", cfg.getPos2()[2]);
        }
        yml.set("min-players", cfg.getMinPlayers());
        yml.set("max-players", cfg.getMaxPlayers());
        yml.set("countdown-duration", cfg.getCountdownDuration());
        yml.set("round-prep-duration", cfg.getRoundPrepDuration());
        yml.set("floor-remove-delay", cfg.getFloorRemoveDelaySeconds());
        yml.set("floor-restore-delay", cfg.getFloorRestoreDelaySeconds());
        yml.set("starting-round-time", cfg.getStartingRoundTime());
        yml.set("minimum-round-time", cfg.getMinimumRoundTime());
        yml.set("round-time-reduction", cfg.getRoundTimeReduction());
        yml.set("win-ending-delay", cfg.getWinEndingDelaySeconds());
        yml.set("allow-join-while-waiting", cfg.isAllowJoinWhileStarting());
        yml.set("spectators-allowed", cfg.isSpectatorsAllowed());
        yml.set("enabled", cfg.isEnabled());
        List<String> matNames = new ArrayList<>();
        for (Material m : cfg.getFloorMaterials()) {
            matNames.add(m.name());
        }
        yml.set("floor-materials", matNames);
        yml.set("generated-layout", cfg.getGeneratedLayout());
        try {
            yml.save(file);
        } catch (Exception ex) {
            plugin.getLogger().log(Level.SEVERE, "Failed to save arena " + cfg.getName(), ex);
        }
    }

    public boolean delete(String name) {
        File file = new File(arenasFolder, name + ".yml");
        return file.exists() && file.delete();
    }

    public List<String> validate(ArenaConfig cfg) {
        boolean worldOk = cfg.getWorldName() != null && Bukkit.getWorld(cfg.getWorldName()) != null;
        ArenaConfigValidator.Fields fields = new ArenaConfigValidator.Fields(
                cfg.getName(),
                worldOk ? cfg.getWorldName() : null,
                cfg.getLobby() != null,
                cfg.getSpawn() != null,
                cfg.getSpectator() != null,
                cfg.hasFloorRegion(),
                cfg.getMinPlayers(),
                cfg.getMaxPlayers(),
                cfg.getCountdownDuration(),
                cfg.getRoundPrepDuration(),
                cfg.getFloorRemoveDelaySeconds(),
                cfg.getFloorRestoreDelaySeconds(),
                cfg.getStartingRoundTime(),
                cfg.getMinimumRoundTime(),
                cfg.getRoundTimeReduction(),
                cfg.getWinEndingDelaySeconds(),
                cfg.getFloorMaterials().stream().map(Material::name).toList()
        );
        List<String> errors = new ArrayList<>(ArenaConfigValidator.validate(fields));
        if (!worldOk && cfg.getWorldName() != null) {
            errors.add("world '" + cfg.getWorldName() + "' is not currently loaded");
        }
        return errors;
    }
}