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/** @file  HL1FileData.h
 *  @brief Definition of in-memory structures for the
 *        Half-Life 1 MDL file format.
 */

#ifndef AI_HL1FILEDATA_INCLUDED
#define AI_HL1FILEDATA_INCLUDED

#include "HalfLifeMDLBaseHeader.h"

#include <assimp/Compiler/pushpack1.h>
#include <assimp/types.h>

namespace Assimp {
namespace MDL {
namespace HalfLife {

using vec3_t = float[3];

struct Header_HL1 : HalfLifeMDLBaseHeader {
    char name[64];
    int32_t length;

    vec3_t eyeposition; // ideal eye position
    vec3_t min; // ideal movement hull size
    vec3_t max;

    vec3_t bbmin; // clipping bounding box
    vec3_t bbmax;

    int32_t unused; // was flags

    int32_t numbones; // bones
    int32_t boneindex;

    int32_t numbonecontrollers; // bone controllers
    int32_t bonecontrollerindex;

    int32_t numhitboxes; // complex bounding boxes
    int32_t hitboxindex;

    int32_t numseq; // animation sequences
    int32_t seqindex;

    int32_t numseqgroups; // demand loaded sequences
    int32_t seqgroupindex;

    int32_t numtextures; // raw textures
    int32_t textureindex;
    int32_t texturedataindex;

    int32_t numskinref; // replaceable textures
    int32_t numskinfamilies;
    int32_t skinindex;

    int32_t numbodyparts;
    int32_t bodypartindex;

    int32_t numattachments; // queryable attachable points
    int32_t attachmentindex;

    int32_t unused2; // was "soundtable"
    int32_t unused3; // was "soundindex"
    int32_t unused4; // was "soundgroups"
    int32_t unused5; // was "soundgroupindex"

    int32_t numtransitions; // animation node to animation node transition graph
    int32_t transitionindex;
} PACK_STRUCT;

// header for demand loaded sequence group data
struct SequenceHeader_HL1 : HalfLifeMDLBaseHeader {
    char name[64];
    int32_t length;
} PACK_STRUCT;

// bones
struct Bone_HL1 {
    char name[32]; // bone name for symbolic links
    int32_t parent; // parent bone
    int32_t unused; // was "flags" -- ??
    int32_t bonecontroller[6]; // bone controller index, -1 == none
    float value[6]; // default DoF values
    float scale[6]; // scale for delta DoF values
} PACK_STRUCT;

// bone controllers
struct BoneController_HL1 {
    int32_t bone; // -1 == 0
    int32_t type; // X, Y, Z, XR, YR, ZR, M
    float start;
    float end;
    int32_t unused; // was "rest" - byte index value at rest
    int32_t index; // 0-3 user set controller, 4 mouth
} PACK_STRUCT;

// intersection boxes
struct Hitbox_HL1 {
    int32_t bone;
    int32_t group; // intersection group
    vec3_t bbmin; // bounding box
    vec3_t bbmax;
} PACK_STRUCT;

//
// demand loaded sequence groups
//
struct SequenceGroup_HL1 {
    char label[32]; // textual name
    char name[64]; // file name
    int32_t unused; // was "cache"  - index pointer
    int32_t unused2; // was "data" -  hack for group 0
} PACK_STRUCT;

// The type of blending for a sequence.
enum SequenceBlendMode_HL1 {
    NoBlend = 1,
    TwoWayBlending = 2,
    FourWayBlending = 4,
};

// sequence descriptions
struct SequenceDesc_HL1 {
    char label[32]; // sequence label

    float fps; // frames per second
    int32_t flags; // looping/non-looping flags

    int32_t activity;
    int32_t actweight;

    int32_t numevents;
    int32_t eventindex;

    int32_t numframes; // number of frames per sequence

    int32_t unused; // was "numpivots" - number of foot pivots
    int32_t unused2; // was "pivotindex"

    int32_t motiontype;
    int32_t motionbone;
    vec3_t linearmovement;
    int32_t unused3; // was "automoveposindex"
    int32_t unused4; // was "automoveangleindex"

    vec3_t bbmin; // per sequence bounding box
    vec3_t bbmax;

    int32_t numblends;
    int32_t animindex; // mstudioanim_t pointer relative to start of sequence group data
                   // [blend][bone][X, Y, Z, XR, YR, ZR]

    int32_t blendtype[2]; // X, Y, Z, XR, YR, ZR
    float blendstart[2]; // starting value
    float blendend[2]; // ending value
    int32_t unused5; // was "blendparent"

    int32_t seqgroup; // sequence group for demand loading

    int32_t entrynode; // transition node at entry
    int32_t exitnode; // transition node at exit
    int32_t nodeflags; // transition rules

    int32_t unused6; // was "nextseq" - auto advancing sequences
} PACK_STRUCT;

// events
struct AnimEvent_HL1 {
    int32_t frame;
    int32_t event;
    int32_t unused; // was "type"
    char options[64];
} PACK_STRUCT;

// attachment
struct Attachment_HL1 {
    char unused[32]; // was "name"
    int32_t unused2; // was "type"
    int32_t bone;
    vec3_t org; // attachment point
    vec3_t unused3[3]; // was "vectors"
} PACK_STRUCT;

struct AnimValueOffset_HL1 {
    unsigned short offset[6];
} PACK_STRUCT;

// animation frames
union AnimValue_HL1 {
    struct {
        uint8_t valid;
        uint8_t total;
    } num;
    short value;
} PACK_STRUCT;

// body part index
struct Bodypart_HL1 {
    char name[64];
    int32_t nummodels;
    int32_t base;
    int32_t modelindex; // index into models array
} PACK_STRUCT;

// skin info
struct Texture_HL1 {
    char name[64];
    int32_t flags;
    int32_t width;
    int32_t height;
    int32_t index;
} PACK_STRUCT;

// studio models
struct Model_HL1 {
    char name[64];

    int32_t unused; // was "type"

    float unused2; // was "boundingradius"

    int32_t nummesh;
    int32_t meshindex;

    int32_t numverts; // number of unique vertices
    int32_t vertinfoindex; // vertex bone info
    int32_t vertindex; // vertex vec3_t
    int32_t numnorms; // number of unique surface normals
    int32_t norminfoindex; // normal bone info
    int32_t normindex; // normal vec3_t

    int32_t unused3; // was "numgroups" - deformation groups
    int32_t unused4; // was "groupindex"
} PACK_STRUCT;

// meshes
struct Mesh_HL1 {
    int32_t numtris;
    int32_t triindex;
    int32_t skinref;
    int32_t numnorms; // per mesh normals
    int32_t unused; // was "normindex" - normal vec3_t
} PACK_STRUCT;

struct Trivert {
    short vertindex; // index into vertex array
    short normindex; // index into normal array
    short s, t; // s,t position on skin
} PACK_STRUCT;

#include <assimp/Compiler/poppack1.h>

#if (!defined AI_MDL_HL1_VERSION)
#define AI_MDL_HL1_VERSION 10
#endif
#if (!defined AI_MDL_HL1_MAX_TRIANGLES)
#define AI_MDL_HL1_MAX_TRIANGLES 20000
#endif
#if (!defined AI_MDL_HL1_MAX_VERTICES)
#define AI_MDL_HL1_MAX_VERTICES 2048
#endif
#if (!defined AI_MDL_HL1_MAX_SEQUENCES)
#define AI_MDL_HL1_MAX_SEQUENCES 2048
#endif
#if (!defined AI_MDL_HL1_MAX_SEQUENCE_GROUPS)
#define AI_MDL_HL1_MAX_SEQUENCE_GROUPS 32
#endif
#if (!defined AI_MDL_HL1_MAX_TEXTURES)
#define AI_MDL_HL1_MAX_TEXTURES 100
#endif
#if (!defined AI_MDL_HL1_MAX_SKIN_FAMILIES)
#define AI_MDL_HL1_MAX_SKIN_FAMILIES 100
#endif
#if (!defined AI_MDL_HL1_MAX_BONES)
#define AI_MDL_HL1_MAX_BONES 128
#endif
#if (!defined AI_MDL_HL1_MAX_BODYPARTS)
#define AI_MDL_HL1_MAX_BODYPARTS 32
#endif
#if (!defined AI_MDL_HL1_MAX_MODELS)
#define AI_MDL_HL1_MAX_MODELS 32
#endif
#if (!defined AI_MDL_HL1_MAX_MESHES)
#define AI_MDL_HL1_MAX_MESHES 256
#endif
#if (!defined AI_MDL_HL1_MAX_EVENTS)
#define AI_MDL_HL1_MAX_EVENTS 1024
#endif
#if (!defined AI_MDL_HL1_MAX_BONE_CONTROLLERS)
#define AI_MDL_HL1_MAX_BONE_CONTROLLERS 8
#endif
#if (!defined AI_MDL_HL1_MAX_ATTACHMENTS)
#define AI_MDL_HL1_MAX_ATTACHMENTS 512
#endif

// lighting options
#if (!defined AI_MDL_HL1_STUDIO_NF_FLATSHADE)
#define AI_MDL_HL1_STUDIO_NF_FLATSHADE 0x0001
#endif
#if (!defined AI_MDL_HL1_STUDIO_NF_CHROME)
#define AI_MDL_HL1_STUDIO_NF_CHROME 0x0002
#endif
#if (!defined AI_MDL_HL1_STUDIO_NF_ADDITIVE)
#define AI_MDL_HL1_STUDIO_NF_ADDITIVE 0x0020
#endif
#if (!defined AI_MDL_HL1_STUDIO_NF_MASKED)
#define AI_MDL_HL1_STUDIO_NF_MASKED 0x0040
#endif

} // namespace HalfLife
} // namespace MDL
} // namespace Assimp

#endif // AI_HL1FILEDATA_INCLUDED