#ifndef SPL_RESOURCE_H
#define SPL_RESOURCE_H

#include <nitro/types.h>

#include "struct_defs/struct_020147B8.h"

#define SPL_TEX_ANIM_MAX_FRAMES 8

enum SPLDrawType {
    SPL_DRAW_TYPE_BILLBOARD = 0,
    SPL_DRAW_TYPE_DIRECTIONAL_BILLBOARD,
    SPL_DRAW_TYPE_POLYGON,
    SPL_DRAW_TYPE_DIRECTIONAL_POLYGON,
    SPL_DRAW_TYPE_DIRECTIONAL_POLYGON_CENTER,
};

enum SPLCircleAxis {
    SPL_CIRCLE_AXIS_Z = 0,
    SPL_CIRCLE_AXIS_Y,
    SPL_CIRCLE_AXIS_X,
    SPL_CIRCLE_AXIS_EMITTER,
};

enum SPLEmissionType {
    SPL_EMISSION_TYPE_POINT = 0, // A single point
    SPL_EMISSION_TYPE_SPHERE_SURFACE, // Any point on the surface of a sphere
    SPL_EMISSION_TYPE_CIRCLE_BORDER, // Any point on a circle around an axis (specified by flags)
    SPL_EMISSION_TYPE_CIRCLE_BORDER_UNIFORM, // Uniform distribution of points on a circle around an axis (specified by flags)
    SPL_EMISSION_TYPE_SPHERE, // Any point inside a sphere
    SPL_EMISSION_TYPE_CIRCLE, // Any point inside a circle around an axis (specified by flags)
    SPL_EMISSION_TYPE_CYLINDER_SURFACE, // Any point on the surface of a cylinder
    SPL_EMISSION_TYPE_CYLINDER, // Any point inside a cylinder
    SPL_EMISSION_TYPE_HEMISPHERE_SURFACE, // Any point on the surface of a hemisphere (direction specified by flags)
    SPL_EMISSION_TYPE_HEMISPHERE, // Any point inside a hemisphere (direction specified by flags)
};

enum SPLChildRotationType {
    SPL_CHILD_ROT_NONE = 0,
    SPL_CHILD_ROT_INHERIT_ANGLE,
    SPL_CHILD_ROT_INHERIT_ANGLE_AND_VELOCITY,
};

enum SPLScaleAnimDir {
    SPL_SCALE_ANIM_DIR_XY = 0,
    SPL_SCALE_ANIM_DIR_X,
    SPL_SCALE_ANIM_DIR_Y,
};

enum SPLPolygonRotAxis {
    SPL_POLYGON_ROT_AXIS_Y = 0,
    SPL_POLYGON_ROT_AXIS_XYZ,
};

typedef struct SPLFileHeader {
    u32 magic;
    u32 version;
    u16 resCount;
    u16 texCount;
    u32 reserved0;
    u32 resSize;
    u32 texSize;
    u32 texOffset;
    u32 reserved1;
} SPLFileHeader;

typedef union SPLResourceFlags {
    u32 all;
    struct {
        u32 emissionType : 4; // Maps to SPLEmissionType
        u32 drawType : 2;
        u32 circleAxis : 2; // Maps to SPLCircleAxis
        u32 hasScaleAnim : 1;
        u32 hasColorAnim : 1;
        u32 hasAlphaAnim : 1;
        u32 hasTexAnim : 1;
        u32 hasRotation : 1;
        u32 randomInitAngle : 1;
        // Whether the emitter manages itself or not.
        // If set, the emitter will automatically terminate when it reaches the end of its life
        // and all of its particles have died
        u32 selfMaintaining : 1;
        u32 followEmitter : 1;
        u32 hasChildResource : 1;
        u32 polygonRotAxis : 2; // The axis to rotate the polygon around when using the 'polygon' draw types
        u32 polygonReferencePlane : 1;
        u32 randomizeLoopedAnim : 1;
        u32 drawChildrenFirst : 1; // If set, child particles will be rendered before parent particles
        u32 hideParent : 1; // If set, only child particles will be rendered
        u32 useViewSpace : 1; // If set, the rendering calculations will be done in view space
        u32 hasGravityBehavior : 1;
        u32 hasRandomBehavior : 1;
        u32 hasMagnetBehavior : 1;
        u32 hasSpinBehavior : 1;
        u32 hasCollisionPlaneBehavior : 1;
        u32 hasConvergenceBehavior : 1;
        u32 hasFixedPolygonID : 1;
        u32 childHasFixedPolygonID : 1;
    };
} SPLResourceFlags;

typedef union SPLChildResourceFlags {
    u16 all;
    struct {
        u16 usesBehaviors : 1;
        u16 hasScaleAnim : 1;
        u16 hasAlphaAnim : 1;
        u16 rotationType : 2;
        u16 followEmitter : 1;
        u16 useChildColor : 1;
        u16 drawType : 2;
        u16 polygonRotAxis : 2;
        u16 polygonReferencePlane : 1;
        u16 : 4;
    };
} SPLChildResourceFlags;

typedef union SPLCurveInOut {
    u16 all;
    struct {
        u16 in : 8;
        u16 out : 8;
    };
} SPLCurveInOut;

typedef union SPLCurveInPeakOut {
    u32 all;
    struct {
        u32 in : 8;
        u32 peak : 8;
        u32 out : 8;
        u32 : 8;
    };
} SPLCurveInPeakOut;

typedef struct SPLResourceHeader {
    SPLResourceFlags flags;
    VecFx32 emitterBasePos;
    fx32 emissionCount; // Number of particles to emit per emission interval
    fx32 radius; // Used for circle, sphere, and cylinder emissions
    fx32 length; // Used for cylinder emission
    VecFx16 axis;
    GXRgb color;
    fx32 initVelPosAmplifier;
    fx32 initVelAxisAmplifier;
    fx32 baseScale;
    fx16 aspectRatio;
    u16 startDelay; // Delay, in frames, before the emitter starts emitting particles
    s16 minRotation;
    s16 maxRotation;
    u16 initAngle;
    u16 reserved;
    u16 emitterLifeTime;
    u16 particleLifeTime;

    // All of these values are mapped to the range [0, 1]
    // They are used to attenuate the particle's properties at initialization,
    // acting as a sort of randomization factor which scales down the initial values
    struct {
        u32 baseScale : 8; // Damping factor for the base scale of the particles (0 = no damping)
        u32 lifeTime : 8;
        u32 initVel : 8; // Attenuation factor for the initial velocity of the particles (0 = no attenuation)
        u32 : 8;
    } randomAttenuation;

    struct {
        u32 emissionInterval : 8;
        u32 baseAlpha : 8;
        u32 airResistance : 8;
        u32 textureIndex : 8;
        u32 loopFrames : 8;
        u32 dbbScale : 16;
        u32 textureTileCountS : 2; // Number of times to tile the texture in the S direction
        u32 textureTileCountT : 2; // Number of times to tile the texture in the T direction
        u32 scaleAnimDir : 3; // Maps to SPLScaleAnimDir
        u32 dpolFaceEmitter : 1; // If set, the polygon will face the emitter
        u32 flipTextureS : 1;
        u32 flipTextureT : 1;
        u32 : 30;
    } misc;
    fx16 polygonX;
    fx16 polygonY;
    struct {
        u32 flags : 8;
        u32 : 24;
    } userData;
} SPLResourceHeader;

typedef struct SPLScaleAnim {
    fx16 start;
    fx16 mid;
    fx16 end;
    SPLCurveInOut curve;
    struct {
        u16 loop : 1;
        u16 : 15;
    } flags;
    u16 padding;
} SPLScaleAnim;

typedef struct SPLColorAnim {
    GXRgb start;
    GXRgb end;
    SPLCurveInPeakOut curve;
    struct {
        u16 randomStartColor : 1;
        u16 loop : 1;
        u16 interpolate : 1;
        u16 : 13;
    } flags;
    u16 padding;
} SPLColorAnim;

typedef struct SPLAlphaAnim {
    union {
        u16 all;
        struct {
            u16 start : 5;
            u16 mid : 5;
            u16 end : 5;
            u16 : 1;
        };
    } alpha;
    struct {
        u16 randomRange : 8;
        u16 loop : 1;
        u16 : 7;
    } flags;
    SPLCurveInOut curve;
    u16 padding;
} SPLAlphaAnim;

typedef struct SPLTexAnim {
    u8 textures[SPL_TEX_ANIM_MAX_FRAMES];
    struct {
        u32 frameCount : 8;
        u32 step : 8; // Number of frames between each texture frame
        u32 randomizeInit : 1; // Randomize the initial texture frame
        u32 loop : 1;
        u32 : 14;
    } param;
} SPLTexAnim;

typedef struct SPLChildResource {
    SPLChildResourceFlags flags;
    fx16 randomInitVelMag; // Randomization factor for the initial velocity magnitude (0 = no randomization)
    fx16 endScale; // For scaling animations
    u16 lifeTime;
    u8 velocityRatio; // Ratio of the parent particle's velocity to inherit (255 = 100%)
    u8 scaleRatio; // Ratio of the parent particle's scale to inherit (255 = 100%)
    GXRgb color;
    struct {
        u32 emissionCount : 8; // Number of particles to emit per emission interval
        u32 emissionDelay : 8; // Delay, as a fraction of the particle's lifetime, before the particle starts emitting
        u32 emissionInterval : 8;
        u32 texture : 8;
        u32 textureTileCountS : 2;
        u32 textureTileCountT : 2;
        u32 flipTextureS : 1;
        u32 flipTextureT : 1;
        u32 dpolFaceEmitter : 1; // If set, the polygon will face the emitter
        u32 : 25;
    } misc;
} SPLChildResource;

typedef struct SPLResource {
    SPLResourceHeader *header;
    SPLScaleAnim *scaleAnim;
    SPLColorAnim *colorAnim;
    SPLAlphaAnim *alphaAnim;
    SPLTexAnim *texAnim;
    SPLChildResource *childResource;
    SPLBehavior *behaviors;
    u16 behaviorCount;
    u16 reserved;
} SPLResource;

#endif // SPL_RESOURCE_H