//
//  ChunkManager.h
//  Chunky
//
//  Created by Dylan Lukes on 2/17/11.
//  Copyright 2011 Dylan Lukes. All rights reserved.
//

#include <map>

/* Constants */

// Size of chunk in memory
static const long ChunkMemSize = 81920;
// Approx. 2GB swap space
static const long SmallSwapSize = 26215;
// Approx. 4GB swap space
static const long MediumSwapSize = SmallSwapSize * 2;

/** struct ChunkPos: Chunk key container (for map)
 *
 */
struct ChunkPos {
    long x;
    long z;
};

/** struct ChunkInfo: Chunk information container (for map)
 * dirty:    Has the chunk been modified since it's last load?
 * resident: Is the chunk in memory? (alternatively, it's on disk)
 * occupied: Is there a player near or in this chunk?
 * offset:   What is the offset into the swap file (only valid for non-resident)
 */
struct ChunkInfo {
    bool dirty;
    bool resident;
    bool occupied;
    long offset;
};

class ChunkManager {
    std::map<ChunkPos, ChunkInfo> chunkLookup;
    long swapSize;
public:
    ChunkManager(long swapSize);
    ~ChunkManager();

    /* Testing methods: both of these modify the chunk info (in different ways) */
    void playerInChunk(ChunkPos chunk);
    void blockEditInChunk(ChunkPos chunk);
};