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//==============================================================================
// trigger_filter
//==============================================================================

//======================================================================
// constants
//======================================================================

const float FILTER_FIELD_STATE = 0;
const float FILTER_FIELD_HEALTH = 1;
const float FILTER_FIELD_WEAPON = 2;
const float FILTER_FIELD_FLAGS = 3;
const float FILTER_FIELD_SPAWNFLAGS = 4;
const float FILTER_FIELD_CLASSNAME = 5;
const float FILTER_FIELD_ESTATE = 6;
const float FILTER_FIELD_TARGETNAME = 8;
const float FILTER_FIELD_ITEMS = 10;
const float FILTER_FIELD_COUNT = 11;
const float FILTER_FIELD_CNT = 12;
const float FILTER_FIELD_TYPE = 13;

const float FILTER_FIELDTYPE_FLOAT = 0;
const float FILTER_FIELDTYPE_STRING = 1;
const float FILTER_FIELDTYPE_FLAG = 2;

const float FILTER_OP_EQUALS = 0;
const float FILTER_OP_LT = 1;
const float FILTER_OP_LTE = 2;
const float FILTER_OP_GT = 3;
const float FILTER_OP_GTE = 4;
const float FILTER_OP_BITMASK_AND = 5;
const float FILTER_OP_BITMASK_OR = 6;

//======================================================================
// fields
//======================================================================

.string include;                        // trigger_filter
.string type;                           // trigger_filter

//======================================================================
// forward declarations
//======================================================================

void() trigger_filter_use;
void(entity e) trigger_filter_init;
void() trigger_filter;

//------------------------------------------------------------------------------

//----------------------------------------------------------------------
// TODO CEV: this needs comments
//----------------------------------------------------------------------
// class trigger_filter: base_trigger
// {
        //--------------------------------------------------------------
        void() trigger_filter_use =
        {
                self.state = 0;

                if (self.estate != STATE_ACTIVE)
                        return;

                local entity targ;
                local float fieldtype, op, result, targfloat;
                local string targstring;

                targfloat = fieldtype = op = result = 0;
                targstring = "";

                if (self.include != "")
                {
                        targ = find (world, targetname, self.include);
                        if (!targ)
                                targ = find (world, targetname2,
                                        self.include);
                        if (!targ)
                                return;
                }
                else
                {
                        targ = activator;
                }

                op = self.weapon;

                switch (self.style)
                {
                        case FILTER_FIELD_STATE:
                                fieldtype = FILTER_FIELDTYPE_FLOAT;
                                targfloat = targ.state;
                                break;

                        case FILTER_FIELD_ESTATE:
                                fieldtype = FILTER_FIELDTYPE_FLOAT;
                                targfloat = targ.estate;
                                break;

                        case FILTER_FIELD_HEALTH:
                                fieldtype = FILTER_FIELDTYPE_FLOAT;
                                targfloat = targ.health;
                                break;

                        case FILTER_FIELD_COUNT:
                                fieldtype = FILTER_FIELDTYPE_FLOAT;
                                targfloat = targ.count;
                                break;

                        case FILTER_FIELD_CNT:
                                fieldtype = FILTER_FIELDTYPE_FLOAT;
                                targfloat = targ.cnt;
                                break;

                        case FILTER_FIELD_WEAPON:
                                fieldtype = FILTER_FIELDTYPE_FLOAT;
                                targfloat = targ.weapon;
                                break;

                        case FILTER_FIELD_FLAGS:
                                fieldtype = FILTER_FIELDTYPE_FLAG;
                                targfloat = targ.flags;
                                break;

                        case FILTER_FIELD_SPAWNFLAGS:
                                fieldtype = FILTER_FIELDTYPE_FLAG;
                                targfloat = targ.spawnflags;
                                break;

                        case FILTER_FIELD_ITEMS:
                                fieldtype = FILTER_FIELDTYPE_FLAG;
                                targfloat = targ.items;
                                break;

                        case FILTER_FIELD_CLASSNAME:
                                fieldtype = FILTER_FIELDTYPE_STRING;
                                targstring = targ.classname;
                                break;

                        case FILTER_FIELD_TARGETNAME:
                                fieldtype = FILTER_FIELDTYPE_STRING;
                                targstring = targ.targetname;
                                break;

                        case FILTER_FIELD_TYPE:
                                fieldtype = FILTER_FIELDTYPE_STRING;
                                targstring = targ.type;
                                break;
                }

                if (fieldtype == FILTER_FIELDTYPE_FLOAT)
                {
                        if (op == FILTER_OP_EQUALS)
                        {
                                if (targfloat == self.count)
                                        result = 1;
                        }
                        else if (op == FILTER_OP_LT)
                        {
                                if (targfloat < self.count)
                                        result = 1;
                        }
                        else if (op == FILTER_OP_LTE)
                        {
                                if (targfloat <= self.count)
                                        result = 1;
                        }
                        else if (op == FILTER_OP_GT)
                        {
                                if (targfloat > self.count)
                                        result = 1;
                        }
                        else if (op == FILTER_OP_GTE)
                        {
                                if (targfloat >= self.count)
                                        result = 1;
                        }
                        else if (op == FILTER_OP_BITMASK_AND)
                        {
                                if (targfloat & self.count)
                                        result = 1;
                        }
                        else if (op == FILTER_OP_BITMASK_OR)
                        {
                                if (targfloat | self.count)
                                        result = 1;
                        }
                        else
                        {
                                if (targfloat == self.count)
                                        result = 1;
                        }
                }
                else if (fieldtype == FILTER_FIELDTYPE_FLAG)
                {
                        if (op == FILTER_OP_EQUALS)
                        {
                                if (targfloat == self.aflag)
                                        result = 1;
                        }
                        else if (op == FILTER_OP_BITMASK_AND)
                        {
                                if (targfloat & self.aflag)
                                        result = 1;
                        }
                        else if (op == FILTER_OP_BITMASK_OR)
                        {
                                if (targfloat | self.aflag)
                                        result = 1;
                        }
                        else
                        {
                                if (targfloat == self.aflag)
                                        result = 1;
                        }
                }
                else if (fieldtype == FILTER_FIELDTYPE_STRING)
                {
                        if (targstring == self.type)
                                result = 1;
                }
                else
                {
                        objerror ("invalid fieldtype");
                        return;
                }

                if (self.spawnflags & 1)
                        // negate
                        result = 1 - result;

                if (result)
                {
                        self.state = 1;

                        // relay activator as owner
                        if (self.spawnflags & 2 && activator.owner)
                                activator = activator.owner;

                        sub_usetargets ();

                        if (other.classtype == CT_TRIGGER_EVERYTHING &&
                                other.spawnflags & 1 && other.wait)
                        {
                                other.attack_finished = time + other.wait;
                        }
                }
        };

        //--------------------------------------------------------------
        void(entity e) trigger_filter_init =
        {
                e.classname = "trigger_filter";
                e.classtype = CT_TRIGGER_FILTER;
                e.use = trigger_filter_use;
                base_trigger_init (e);
        };

        //--------------------------------------------------------------
        void() trigger_filter =
        {
                // new spawnflags for all entities -- iw
                if (SUB_Inhibit())
                        return;

                trigger_filter_init (self);
        };
// };