#pragma once
#include <cstdint>

// ==============================================================================
// EBLAN ENGINE - Binary Level Format Specification (assets/map.dat)
// ==============================================================================

constexpr uint32_t MAP_MAGIC = 0x4E4C4245; // 'EBLN'
constexpr uint16_t MAP_FORMAT_VERSION = 4;  // v4 adds a cutscene track and CP1251 string pool
constexpr int MAP_GRID_W = 32;
constexpr int MAP_GRID_H = 32;
constexpr int MAP_TOTAL_CELLS = MAP_GRID_W * MAP_GRID_H; // 1024 bytes
constexpr int MAX_LEVEL_SPRITES = 32;

// Cell Types
enum CellType : uint8_t {
    CELL_EMPTY     = 0,
    CELL_BRICK     = 1,
    CELL_WOOD      = 2,
    CELL_STONE     = 3,
    CELL_METAL     = 4,
    CELL_DOOR      = 5,
    CELL_DOOR_OPEN = 6,
    CELL_PILLAR    = 7,
    CELL_GLASS     = 8,
    CELL_MARBLE    = 9,
    CELL_PORTAL    = 10,
    CELL_COUNT     = 11
};

constexpr int MAX_LEVEL_TRANSITIONS = 16;
constexpr int MAX_CUTSCENE_EVENTS = 128;
constexpr int MAX_CUTSCENE_STRINGS = 32;
constexpr int CUTSCENE_STRING_BYTES = 96;
constexpr int CUTSCENE_MAX_DURATION = 3600;
constexpr uint16_t CUTSCENE_AUTOPLAY = 1;

enum CutsceneOpCode : uint8_t {
    OP_END, OP_WAIT, OP_MOVE_CAM_TO, OP_PAN_CAM_TO, OP_SHOW_SUBTITLE,
    OP_HIDE_SUBTITLE, OP_PLAY_SOUND, OP_FADE_SCREEN, OP_CHANGE_SUBLEVEL
};

#pragma pack(push, 1)
struct LevelTransition {
    uint8_t  triggerCellX;     // Trigger cell coordinate X (0..31)
    uint8_t  triggerCellY;     // Trigger cell coordinate Y (0..31)
    char     targetMap[32];    // Target sublevel filename (e.g. "sublevel_02.dat")
    uint16_t targetSpawnX;     // Spawn cell X in destination map (0..31)
    uint16_t targetSpawnY;     // Spawn cell Y in destination map (0..31)
    uint16_t targetAngle;      // Player orientation (0..511)
    uint8_t  fadeEffect;       // 1 = smooth fade to black, 0 = instant cut
    uint8_t  reserved;         // Padding (total 42 bytes)
};

struct MapHeader {
    uint32_t magic;            // 'EBLN'
    uint16_t version;          // Current writer: 4; reader also accepts v1/v2/v3
    uint16_t mapWidth;         // 32
    uint16_t mapHeight;        // 32
    uint16_t playerStartX;     // Cell coordinate (0..31)
    uint16_t playerStartY;     // Cell coordinate (0..31)
    uint16_t playerStartAngle; // 0..511 (0=East, 128=South, 256=West, 384=North)
    uint16_t spriteCount;      // Number of active sprites
    uint32_t ceilingColor;     // 00RRGGBBh
    uint32_t floorColor;       // 00RRGGBBh
    uint16_t transitionCount;  // Number of sublevel transitions
    uint16_t cutsceneCount;    // v4 only; old versions ignore the remaining header fields
    uint16_t cutsceneStringCount;
    uint16_t cutsceneFlags;    // bit 0 = start automatically after entering this map
    uint8_t  reserved[4];     // Total header remains 38 bytes
};

struct CutsceneEvent {
    uint16_t tickTimestamp;   // Absolute 60 Hz timeline timestamp, 0..65535
    uint8_t opCode;
    uint8_t param8;           // PLAY_SOUND bit 0 = loop; other operations require 0
    int32_t paramA;           // X, angle, text/sound index, fade level or transition index
    int32_t paramB;           // Y, duration (PAN/FADE/SUBTITLE) or unused
    int32_t dataId;           // MOVE duration; never a serialized memory pointer
};

// Engine world units: 1 cell = 64 units (raw integers, NOT fixed point).
struct SpriteEntry {
    int32_t  x;                // Raw world units (cell * 64 + 32)
    int32_t  y;                // Raw world units
    uint32_t textureId;        // Texture slot 1..15 (0 = solid marker color)
    int32_t  scale;            // 16.16 fixed point (65536 = 1.0)
    uint32_t dist;             // Runtime calculation (can be 0)
    uint32_t flags;            // Flags / type
};
#pragma pack(pop)

static_assert(sizeof(MapHeader) == 38, "EBLN header layout changed");
static_assert(sizeof(SpriteEntry) == 24, "EBLN sprite layout changed");
static_assert(sizeof(LevelTransition) == 42, "EBLN transition layout changed");
static_assert(sizeof(CutsceneEvent) == 16, "EBLN cutscene event layout changed");