package net.minecraft.block;

import java.util.Random;
import net.minecraft.block.material.Material;
import net.minecraft.block.properties.IProperty;
import net.minecraft.block.properties.PropertyBool;
import net.minecraft.block.state.BlockStateContainer;
import net.minecraft.block.state.IBlockState;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.Mirror;
import net.minecraft.util.Rotation;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;

public class BlockObserver extends BlockDirectional
{
    public static final PropertyBool POWERED = PropertyBool.create("powered");

    public BlockObserver()
    {
        super(Material.ROCK);
        this.setDefaultState(this.blockState.getBaseState().withProperty(FACING, EnumFacing.SOUTH).withProperty(POWERED, Boolean.valueOf(false)));
        this.setCreativeTab(CreativeTabs.REDSTONE);
    }

    protected BlockStateContainer createBlockState()
    {
        return new BlockStateContainer(this, new IProperty[] {FACING, POWERED});
    }

    /**
     * Returns the blockstate with the given rotation from the passed blockstate. If inapplicable, returns the passed
     * blockstate.
     */
    public IBlockState withRotation(IBlockState state, Rotation rot)
    {
        return state.withProperty(FACING, rot.rotate((EnumFacing)state.getValue(FACING)));
    }

    /**
     * Returns the blockstate with the given mirror of the passed blockstate. If inapplicable, returns the passed
     * blockstate.
     */
    public IBlockState withMirror(IBlockState state, Mirror mirrorIn)
    {
        return state.withRotation(mirrorIn.toRotation((EnumFacing)state.getValue(FACING)));
    }

    public void updateTick(World worldIn, BlockPos pos, IBlockState state, Random rand)
    {
        if (((Boolean)state.getValue(POWERED)).booleanValue())
        {
            worldIn.setBlockState(pos, state.withProperty(POWERED, Boolean.valueOf(false)), 2);
        }
        else
        {
            worldIn.setBlockState(pos, state.withProperty(POWERED, Boolean.valueOf(true)), 2);
            worldIn.scheduleUpdate(pos, this, 2);
        }

        this.updateNeighborsInFront(worldIn, pos, state);
    }

    /**
     * Called when a neighboring block was changed and marks that this state should perform any checks during a neighbor
     * change. Cases may include when redstone power is updated, cactus blocks popping off due to a neighboring solid
     * block, etc.
     */
    public void neighborChanged(IBlockState state, World worldIn, BlockPos pos, Block blockIn, BlockPos fromPos)
    {
    }

    public void observedNeighborChanged(IBlockState state, World worldIn, BlockPos pos, Block blockIn, BlockPos fromPos)
    {
        if (!worldIn.isRemote && pos.offset((EnumFacing)state.getValue(FACING)).equals(fromPos))
        {
            this.startSignal(state, worldIn, pos);
        }
    }

    private void startSignal(IBlockState p_190960_1_, World p_190960_2_, BlockPos pos)
    {
        if (!((Boolean)p_190960_1_.getValue(POWERED)).booleanValue())
        {
            if (!p_190960_2_.isUpdateScheduled(pos, this))
            {
                p_190960_2_.scheduleUpdate(pos, this, 2);
            }
        }
    }

    protected void updateNeighborsInFront(World worldIn, BlockPos pos, IBlockState state)
    {
        EnumFacing enumfacing = (EnumFacing)state.getValue(FACING);
        BlockPos blockpos = pos.offset(enumfacing.getOpposite());
        worldIn.neighborChanged(blockpos, this, pos);
        worldIn.notifyNeighborsOfStateExcept(blockpos, this, enumfacing);
    }

    /**
     * Can this block provide power. Only wire currently seems to have this change based on its state.
     */
    public boolean canProvidePower(IBlockState state)
    {
        return true;
    }

    public int getStrongPower(IBlockState blockState, IBlockAccess blockAccess, BlockPos pos, EnumFacing side)
    {
        return blockState.getWeakPower(blockAccess, pos, side);
    }

    public int getWeakPower(IBlockState blockState, IBlockAccess blockAccess, BlockPos pos, EnumFacing side)
    {
        return ((Boolean)blockState.getValue(POWERED)).booleanValue() && blockState.getValue(FACING) == side ? 15 : 0;
    }

    /**
     * Called after the block is set in the Chunk data, but before the Tile Entity is set
     */
    public void onBlockAdded(World worldIn, BlockPos pos, IBlockState state)
    {
        if (!worldIn.isRemote)
        {
            if (((Boolean)state.getValue(POWERED)).booleanValue())
            {
                this.updateTick(worldIn, pos, state, worldIn.rand);
            }

            this.startSignal(state, worldIn, pos);
        }
    }

    /**
     * Called serverside after this block is replaced with another in Chunk, but before the Tile Entity is updated
     */
    public void breakBlock(World worldIn, BlockPos pos, IBlockState state)
    {
        if (((Boolean)state.getValue(POWERED)).booleanValue() && worldIn.isUpdateScheduled(pos, this))
        {
            this.updateNeighborsInFront(worldIn, pos, state.withProperty(POWERED, Boolean.valueOf(false)));
        }
    }

    /**
     * Called by ItemBlocks just before a block is actually set in the world, to allow for adjustments to the
     * IBlockstate
     */
    public IBlockState getStateForPlacement(World worldIn, BlockPos pos, EnumFacing facing, float hitX, float hitY, float hitZ, int meta, EntityLivingBase placer)
    {
        return this.getDefaultState().withProperty(FACING, EnumFacing.getDirectionFromEntityLiving(pos, placer).getOpposite());
    }

    /**
     * Convert the BlockState into the correct metadata value
     */
    public int getMetaFromState(IBlockState state)
    {
        int i = 0;
        i = i | ((EnumFacing)state.getValue(FACING)).getIndex();

        if (((Boolean)state.getValue(POWERED)).booleanValue())
        {
            i |= 8;
        }

        return i;
    }

    /**
     * Convert the given metadata into a BlockState for this Block
     */
    public IBlockState getStateFromMeta(int meta)
    {
        return this.getDefaultState().withProperty(FACING, EnumFacing.getFront(meta & 7));
    }

    /* ======================================== FORGE START =====================================*/
    @Override
    public void observedNeighborChange(IBlockState observerState, World world, BlockPos observerPos, Block changedBlock, BlockPos changedBlockPos)
    {
        observedNeighborChanged(observerState, world, observerPos, changedBlock, changedBlockPos);
    }
    /* ========================================= FORGE END ======================================*/
}