#pragma once

/** If this global exists, only functions with spawnfunc_ name prefix qualify as spawn functions */
noref bool require_spawnfunc_prefix;
.bool spawnfunc_checked;

// Optional type checking; increases compile time too much to be enabled by default
#if 0
	bool entityfieldassignablefromeditor(int i)
	{
		switch (entityfieldtype(i))
		{
			case FIELD_STRING:
			case FIELD_FLOAT:
			case FIELD_VECTOR:
				return true;
		}
		return false;
	}

	#define _spawnfunc_checktypes(fld) \
		if (fieldname == #fld) \
			if (!entityfieldassignablefromeditor(i)) LOG_FATALF("Entity field '%s' cannot be whitelisted", fieldname);
#else
	#define _spawnfunc_checktypes(fld)
#endif
	#define _spawnfunc_check(fld) \
		if (fieldname == #fld) continue;

	noref bool __spawnfunc_expecting;
	noref entity __spawnfunc_expect;
	bool __spawnfunc_unreachable_workaround = true;

	#define spawnfunc_1(id) spawnfunc_2(id, FIELDS_UNION)
	#define spawnfunc_2(id, whitelist) \
		void __spawnfunc_##id(entity this); \
		[[accumulate]] void spawnfunc_##id(entity this) \
		{ \
			if (__spawnfunc_expecting) \
			{ \
				/* engine call */ \
				__spawnfunc_expecting = false; \
				this = __spawnfunc_expect; \
				__spawnfunc_expect = NULL; \
			} \
			else \
			{ \
				assert(this); \
			} \
			if (!this.sourceLoc) \
			{ \
				this.sourceLoc = __FILE__ ":" STR(__LINE__); \
			} \
			if (!this.spawnfunc_checked) \
			{ \
				for (int i = 0, n = numentityfields(); i < n; ++i) \
				{ \
					string value = getentityfieldstring(i, this); \
					string fieldname = entityfieldname(i); \
					whitelist(_spawnfunc_checktypes) \
					if (value == "") continue; \
					if (fieldname == "") continue; \
					FIELDS_COMMON(_spawnfunc_check) \
					whitelist(_spawnfunc_check) \
					LOG_WARNF(_("Entity field %s.%s (%s) is not whitelisted. If you believe this is an error, please file an issue."), #id, fieldname, value); \
				} \
				this.spawnfunc_checked = true; \
			} \
			__spawnfunc_##id(this); \
			if (__spawnfunc_unreachable_workaround) return; \
		} \
		void __spawnfunc_##id(entity this)

	#define FIELD_SCALAR(fld, n) \
		fld(n)
	#define FIELD_VEC(fld, n) \
		fld(n) \
		fld(n##_x) \
		fld(n##_y) \
		fld(n##_z)

	#define FIELDS_NONE(fld)
	#define FIELDS_ALL(fld) if (false)

	#define FIELDS_COMMON(fld) \
		FIELD_SCALAR(fld, classname) \
		FIELD_SCALAR(fld, sourceLoc) \
		FIELD_SCALAR(fld, spawnfunc_checked) \
		FIELD_VEC(fld, origin) \
		/**/

	#define FIELDS_UNION(fld) \
		FIELD_SCALAR(fld, Version) \
		FIELD_SCALAR(fld, ammo_cells) \
		FIELD_SCALAR(fld, ammo_nails) \
		FIELD_SCALAR(fld, ammo_rockets) \
		FIELD_SCALAR(fld, armorvalue) \
		FIELD_SCALAR(fld, atten) \
		FIELD_SCALAR(fld, bgmscriptdecay) \
		FIELD_SCALAR(fld, bgmscriptsustain) \
		FIELD_SCALAR(fld, bgmscript) \
		FIELD_SCALAR(fld, button0) \
		FIELD_SCALAR(fld, cnt) \
		FIELD_SCALAR(fld, colormap) \
		FIELD_SCALAR(fld, count) \
		FIELD_SCALAR(fld, curvetarget) \
		FIELD_SCALAR(fld, cvarfilter) \
		FIELD_SCALAR(fld, debrisdamageforcescale) \
		FIELD_SCALAR(fld, debrisfadetime) \
		FIELD_SCALAR(fld, debristimejitter) \
		FIELD_SCALAR(fld, debristime) \
		FIELD_SCALAR(fld, debris) \
		FIELD_SCALAR(fld, delay) \
		FIELD_SCALAR(fld, dmgtime) \
		FIELD_SCALAR(fld, dmg) \
		FIELD_SCALAR(fld, dmg_edge) \
		FIELD_SCALAR(fld, dmg_force) \
		FIELD_SCALAR(fld, dmg_radius) \
		FIELD_SCALAR(fld, effects) \
		FIELD_SCALAR(fld, flags) \
		FIELD_SCALAR(fld, fog) \
		FIELD_SCALAR(fld, frags) \
		FIELD_SCALAR(fld, frame) \
		FIELD_SCALAR(fld, gametypefilter) \
		FIELD_SCALAR(fld, geomtype) \
		FIELD_SCALAR(fld, gravity) \
		FIELD_SCALAR(fld, health) \
		FIELD_SCALAR(fld, height) \
		FIELD_SCALAR(fld, impulse) \
		FIELD_SCALAR(fld, killtarget) \
		FIELD_SCALAR(fld, lerpfrac) \
		FIELD_SCALAR(fld, light_lev) \
		FIELD_SCALAR(fld, lip) \
		FIELD_SCALAR(fld, loddistance1) \
		FIELD_SCALAR(fld, lodmodel1) \
		FIELD_SCALAR(fld, ltime) \
		FIELD_SCALAR(fld, mdl) \
		FIELD_SCALAR(fld, message2) \
		FIELD_SCALAR(fld, message) \
		FIELD_SCALAR(fld, modelindex) \
		FIELD_SCALAR(fld, modelscale) \
		FIELD_SCALAR(fld, model) \
		FIELD_SCALAR(fld, monsterid) \
		FIELD_SCALAR(fld, monster_moveflags) \
		FIELD_SCALAR(fld, monster_name) \
		FIELD_SCALAR(fld, movetype) \
		FIELD_SCALAR(fld, move_movetype) \
		FIELD_SCALAR(fld, netname) \
		FIELD_SCALAR(fld, nextthink) \
		FIELD_SCALAR(fld, noalign) \
		FIELD_SCALAR(fld, noise1) \
		FIELD_SCALAR(fld, noise2) \
		FIELD_SCALAR(fld, noise) \
		FIELD_SCALAR(fld, phase) \
		FIELD_SCALAR(fld, platmovetype) \
		FIELD_SCALAR(fld, race_place) \
		FIELD_SCALAR(fld, radius) \
		FIELD_SCALAR(fld, respawntimestart) \
		FIELD_SCALAR(fld, respawntimejitter) \
		FIELD_SCALAR(fld, respawntime) \
		FIELD_SCALAR(fld, restriction) \
		FIELD_SCALAR(fld, scale) \
		FIELD_SCALAR(fld, skin) \
		FIELD_SCALAR(fld, solid) \
		FIELD_SCALAR(fld, sound1) \
		FIELD_SCALAR(fld, sounds) \
		FIELD_SCALAR(fld, spawnflags) \
		FIELD_SCALAR(fld, speed) \
		FIELD_SCALAR(fld, strength) \
		FIELD_SCALAR(fld, target2) \
		FIELD_SCALAR(fld, target3) \
		FIELD_SCALAR(fld, target4) \
		FIELD_SCALAR(fld, targetname) \
		FIELD_SCALAR(fld, target) \
		FIELD_SCALAR(fld, target_random) \
		FIELD_SCALAR(fld, target_range) \
		FIELD_SCALAR(fld, team) \
		FIELD_SCALAR(fld, turret_scale_health) \
		FIELD_SCALAR(fld, turret_scale_range) \
		FIELD_SCALAR(fld, turret_scale_respawn) \
		FIELD_SCALAR(fld, volume) \
		FIELD_SCALAR(fld, wait) \
		FIELD_SCALAR(fld, warpzone_fadeend) \
		FIELD_SCALAR(fld, warpzone_fadestart) \
		FIELD_SCALAR(fld, weapon) \
		FIELD_VEC(fld, absmax) \
		FIELD_VEC(fld, absmin) \
		FIELD_VEC(fld, angles) \
		FIELD_VEC(fld, avelocity) \
		FIELD_VEC(fld, maxs) \
		FIELD_VEC(fld, maxs) \
		FIELD_VEC(fld, mins) \
		FIELD_VEC(fld, modelscale_vec) \
		FIELD_VEC(fld, velocity) \
		/**/

	#define spawnfunc(...) EVAL_spawnfunc(OVERLOAD(spawnfunc, __VA_ARGS__))
	#define EVAL_spawnfunc(...) __VA_ARGS__