package eu.mhsl.minecraft.pixelblocks;

import eu.mhsl.minecraft.pixelblocks.utils.Direction;
import eu.mhsl.minecraft.pixelblocks.pixelblock.PixelBlock;
import org.bukkit.Bukkit;
import org.bukkit.Location;

import java.sql.*;
import java.util.UUID;

public class PixelBlockDatabase {
    private final Connection db;

    private final PreparedStatement getAllPixelBlocks;
    private final PreparedStatement deletePixelBlock;
    private final PreparedStatement insertOrReplacePixelBlock;

    public PixelBlockDatabase(String url) {
        try {
            Class.forName("org.sqlite.JDBC");
            this.db = DriverManager.getConnection(url);

            this.db.createStatement().execute(
            "CREATE TABLE IF NOT EXISTS pixelblocks (" +
                    "uuid CHAR(36) PRIMARY KEY, " +
                    "owner CHAR(36), " +
                    "locationWorldName CHAR(36), " +
                    "locationX DOUBLE, " +
                    "locationY DOUBLE, " +
                    "locationZ DOUBLE, " +
                    "entryLocationWorldName CHAR(36), " +
                    "entryLocationX DOUBLE, " +
                    "entryLocationY DOUBLE, " +
                    "entryLocationZ DOUBLE, " +
                    "direction CHAR(36)" +
                ")"
            );

            this.deletePixelBlock = this.db.prepareStatement("DELETE FROM pixelblocks WHERE uuid = ?");
            this.getAllPixelBlocks = this.db.prepareStatement("SELECT * FROM pixelblocks");
            this.insertOrReplacePixelBlock = this.db.prepareStatement(
                "INSERT OR REPLACE INTO pixelblocks(uuid, owner, " +
                    "locationWorldName, locationX, locationY, locationZ, " +
                    "entryLocationWorldName, entryLocationX, entryLocationY, entryLocationZ, direction) " +
                    "VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?);"
            );

        } catch (SQLException | RuntimeException | ClassNotFoundException e) {
            throw new RuntimeException("Error while initializing database", e);
        }
    }

    public void close() throws SQLException {
        deletePixelBlock.close();
        getAllPixelBlocks.close();
        insertOrReplacePixelBlock.close();
        db.close();
    }

    public void deletePixelBlock(PixelBlock pixelBlock) {
        Bukkit.getScheduler().runTaskAsynchronously(Main.plugin, () -> {
            try {
                this.deletePixelBlock.setString(1, pixelBlock.getBlockUUID().toString());
                this.deletePixelBlock.executeUpdate();
            } catch (SQLException e) {
                throw new RuntimeException("Failed to delete PixelBlock from the database", e);
            }
        });
    }

    public void savePixelBlock(PixelBlock pixelBlock) {
        Bukkit.getScheduler().runTask(Main.plugin, () -> {
            try {
                this.insertOrReplacePixelBlock.setString(1, pixelBlock.getBlockUUID().toString());
                this.insertOrReplacePixelBlock.setString(2, pixelBlock.getOwnerUUID().toString());

                this.insertOrReplacePixelBlock.setString(3, pixelBlock.getPixelBlockLocation().getWorld().getName());
                this.insertOrReplacePixelBlock.setDouble(4, pixelBlock.getPixelBlockLocation().getX());
                this.insertOrReplacePixelBlock.setDouble(5, pixelBlock.getPixelBlockLocation().getY());
                this.insertOrReplacePixelBlock.setDouble(6, pixelBlock.getPixelBlockLocation().getZ());

                if (pixelBlock.hasLastEntryLocation()) {
                    this.insertOrReplacePixelBlock.setString(7, pixelBlock.getLastEntryLocation().getWorld().getName());
                    this.insertOrReplacePixelBlock.setDouble(8, pixelBlock.getLastEntryLocation().getX());
                    this.insertOrReplacePixelBlock.setDouble(9, pixelBlock.getLastEntryLocation().getY());
                    this.insertOrReplacePixelBlock.setDouble(10, pixelBlock.getLastEntryLocation().getZ());
                } else {
                    this.insertOrReplacePixelBlock.setString(7, pixelBlock.getPixelBlockLocation().getWorld().getName());
                    this.insertOrReplacePixelBlock.setDouble(8, pixelBlock.getPixelBlockLocation().getX());
                    this.insertOrReplacePixelBlock.setDouble(9, pixelBlock.getPixelBlockLocation().getY());
                    this.insertOrReplacePixelBlock.setDouble(10, pixelBlock.getPixelBlockLocation().getZ());
                }

                this.insertOrReplacePixelBlock.setString(11, pixelBlock.getFacingDirection().toString());

                this.insertOrReplacePixelBlock.executeUpdate();
            } catch (SQLException e) {
                throw new RuntimeException("Failed to create or update PixelBlock in the database", e);
            }
        });
    }

    public void loadPixelBlocks() {
        try {
            ResultSet allPixelBlocks = this.getAllPixelBlocks.executeQuery();

            while (allPixelBlocks.next()) {
                Location blockLocation = new Location(
                    Bukkit.getWorld(allPixelBlocks.getString("locationWorldName")),
                    allPixelBlocks.getDouble("locationX"),
                    allPixelBlocks.getDouble("locationY"),
                    allPixelBlocks.getDouble("locationZ")
                );

                Location entryLocation = new Location(
                    Bukkit.getWorld(allPixelBlocks.getString("entryLocationWorldName")),
                    allPixelBlocks.getDouble("entryLocationX"),
                    allPixelBlocks.getDouble("entryLocationY"),
                    allPixelBlocks.getDouble("entryLocationZ")
                );

                PixelBlock block = new PixelBlock(
                    blockLocation,
                    UUID.fromString(allPixelBlocks.getString("owner")),
                    UUID.fromString(allPixelBlocks.getString("uuid")),
                    Direction.valueOf(allPixelBlocks.getString("direction"))
                );
                block.setLastEntryLocation(entryLocation);
            }
        } catch (SQLException e) {
            throw new RuntimeException("Failed loading PixelBlocks from the database", e);
        }
    }
}