/* 
just a dummy clr patch 

*/

#include "m_pd.h"

#include <time.h>
#include <math.h>
#include <stdlib.h>

// mono
#include <mono/jit/jit.h>
#include <mono/metadata/object.h>
#include <mono/metadata/environment.h>
#include <mono/metadata/assembly.h>
#include <mono/metadata/debug-helpers.h>
#include <string.h>
#include <stdlib.h>

#define MAX_SELECTORS 256
#define MAX_OUTLETS 32

void *clr_new(t_symbol *s, int argc, t_atom *argv);

// list of mono methods
typedef struct selectorList selectorList;
typedef struct selectorList
{
	char *sel; // the selector
	MonoMethod *func; // the function
	int type;
//	selectorList *next; // next element of the list
};

// list of outlets
typedef struct outletList outletList;
typedef struct outletList
{
	t_outlet *outlet_pointer;
//	outletList *next; // next element of the list
};

// simplyfied atom
typedef struct atom_simple atom_simple;
typedef enum
{
    A_S_NULL=0,
    A_S_FLOAT=1,
    A_S_SYMBOL=2,
}  t_atomtype_simple;

typedef struct atom_simple
{
	//t_atomtype_simple a_type;
	int a_type;
	float float_value;
	MonoString *string_value;

};

static t_class *clr_class;

typedef struct _clr
{
    t_object x_obj; // myself
	t_outlet *l_out;
	t_symbol *assemblyname;
	t_symbol *filename;
	int loaded;
	// mono stuff
	MonoDomain *domain;
	MonoAssembly *assembly, *assemblyPureData;
	MonoObject *obj;
	MonoImage *image, *imagePureData;
	MonoMethod *method, *setUp, *manageBang, *manageSymbol, *manageFloat, *manageList;
	MonoClass *klass;
	int n;

	// TODO: dynamic memory allocation
	selectorList selectors[MAX_SELECTORS];
	outletList outlets[MAX_OUTLETS];

} t_clr;


// mono functions

static void mono_clean(t_clr *x)
{
	// clean up stuff
	//mono_jit_cleanup (x->domain);
	//mono_domain_free(x->domain);
}

void registerMonoMethod(void *x, MonoString *selectorString, MonoString *methodString, int type);
void createInlet(void *x1, MonoString *selectorString, int type);
void createOutlet(void *x1, int type);
void out2outlet(void *x1, int outlet, int atoms_length, MonoArray *array);
void post2pd(MonoString *mesString);
void error2pd(MonoString *mesString);

static void mono_initialize()
{
	mono_jit_init ("PureData");
}

// load the variables and init mono
static void mono_load(t_clr *x, int argc, t_atom *argv)
{
//	const char *file="D:\\Davide\\cygwin\\home\\Davide\\externalTest1.dll";
	//const char *file="External.dll";
	
	MonoMethod *m = NULL, *ctor = NULL, *fail = NULL, *mvalues;
	MonoClassField *classPointer;
	gpointer iter;
	gpointer *args;
	int val;
	int i,j;
	int params;
	t_symbol *strsymbol;
	atom_simple *listparams;

	if (x->loaded == 0)
	{
		error("assembly not specified");
		return;
	}

	// prepare the selectors list
	for (i=0; i<MAX_SELECTORS; i++)
	{
		x->selectors[i].sel = 0;
		x->selectors[i].func = 0;
	}
	// and the outlets list
	for (i=0; i<MAX_OUTLETS; i++)
	{
		x->outlets[i].outlet_pointer = 0;
	}

	//mono_set_dirs (NULL, NULL);
	//mono_config_parse (NULL);

	//mono_jit_init (random_name_str);
	x->domain = mono_domain_get();
	x->assembly = mono_domain_assembly_open (x->domain, x->filename->s_name);
	x->assemblyPureData = mono_domain_assembly_open (x->domain, "PureData.dll");

	if (!x->assembly)
	{
		error("clr: file %s not found!", x->filename->s_name);
		return;
	}

	if (!x->assemblyPureData)
	{
		error("clr: assembly PureData.dll not found! it is necessary!");
		return;
	}

	x->image = mono_assembly_get_image (x->assembly);

	x->imagePureData = mono_assembly_get_image (x->assemblyPureData);

	
	x->klass = mono_class_from_name (x->image, "PureData", x->assemblyname->s_name);
	if (!x->klass) {
		error("Can't find %s in assembly %s\n", x->assemblyname->s_name, mono_image_get_filename (x->image));
		return;
	}
	x->obj = mono_object_new (x->domain, x->klass);
	
	//mono_runtime_object_init (x->obj);

	if (argc>2)
		params = argc - 2;
	else
		params = 0;

	/* retrieve all the methods we need */
	iter = NULL;
	while ((m = mono_class_get_methods (x->klass, &iter))) {
		if (strcmp (mono_method_get_name (m), "test") == 0) {
			x->method = m;
		} else if (strcmp (mono_method_get_name (m), "SetUp") == 0) {
			x->setUp = m;
		} else if (strcmp (mono_method_get_name (m), "Fail") == 0) {
			fail = m;
		} else if (strcmp (mono_method_get_name (m), "Values") == 0) {
			mvalues = m;
		} else if (strcmp (mono_method_get_name (m), ".ctor") == 0) {
			/* Check it's the ctor that takes two args:
			 * as you see a contrsuctor is a method like any other.
			 */
			MonoMethodSignature * sig = mono_method_signature (m);
			if (mono_signature_get_param_count (sig) == params) {
				ctor = m;
			}
		}
	}
	// set the pointer
	classPointer = 0;
	classPointer = mono_class_get_field_from_name (x->klass, "x");
	if (classPointer)
	{
		mono_field_set_value (x->obj, classPointer, &x);
		
	} else
	{
		error("could not find the x field in %s, it is needed!", x->assemblyname->s_name);
		return;
	}
	// call the base functions
	if (x->setUp)
	{
		mono_runtime_invoke (x->setUp, x->obj, NULL, NULL);
		post("SetUp() invoked");
	} else
	{
		error("clr: the provided assembly is not valid! the SetUp function is missing");
		return;
	}
	// now call the class constructor
	if (ctor)
	{
		args = malloc(sizeof(gpointer)*params);
		listparams = malloc(sizeof(atom_simple)*params);
		for (j=2; j<argc; j++)
		{
			switch ((argv+j)->a_type)
			{
			case A_FLOAT:
				listparams[j-2].a_type =  A_S_FLOAT;
				listparams[j-2].float_value = (double) atom_getfloat(argv+j);
				args[j-2] = &(listparams[j-2].float_value);
				break;
			case A_SYMBOL:
				listparams[j-2].a_type =  A_S_SYMBOL;
				strsymbol = atom_getsymbol(argv+j);
				listparams[j-2].string_value = mono_string_new (x->domain, strsymbol->s_name);
				args[j-2] = listparams[j-2].string_value;
				break;
			}
		}
		mono_runtime_invoke (ctor, x->obj, args, NULL);
		free(listparams);
		free(args);
	} else
	{
		error("%s doesn't have a constructor with %i parameters!",x->assemblyname->s_name, params);
	}

	// all done without errors
	x->loaded = 1;

}

/*
// call the method
static void clr_bang(t_clr *x) {

	gpointer args [2];
	int val;
	MonoObject *result;

	val = x->n;
	args [0] = &val;

	if (x->method)
	{
		result = mono_runtime_invoke (x->method, x->obj, args, NULL);
		val = *(int*)mono_object_unbox (result);
		x->n = val;
	//	outlet_float(x->l_out, (float) x->n);
	}


}
*/

// finds a method from its name
void findMonoMethod( MonoClass *klass, char *function_name, MonoMethod **met)
{
	int trovato;
	MonoMethod *m = NULL;
	gpointer iter;
	iter = NULL;
	while (m = mono_class_get_methods (klass, &iter)) 
	{
		if (strcmp (mono_method_get_name (m), function_name) == 0) 
		{
			*met = m;
//printf("%s trovata\n", function_name);
			return;
		} 	
	}
}

void clr_free(t_clr *x)
{
	mono_clean(x);
}

static void clr_bang(t_clr *x) 
{
	if (x->loaded == 0)
	{
		error("assembly not specified");
		return;
	}
	if (x->manageBang)
	{
		mono_runtime_invoke (x->manageBang, x->obj, NULL, NULL);
	}
}

static void clr_symbol(t_clr *x, t_symbol *sl) 
{
	gpointer args [1];
	MonoString *strmono;
	strmono = mono_string_new (x->domain, sl->s_name);
	args[0] = &strmono;
	if (x->loaded == 0)
	{
		error("assembly not specified");
		return;
	}
	if (x->manageSymbol)
	{
		mono_runtime_invoke (x->manageSymbol, x->obj, args, NULL);
	}
}

static void clr_float(t_clr *x, float f) 
{
	gpointer args [1];
	args [0] = &f;
	if (x->loaded == 0)
	{
		error("assembly not specified");
		return;
	}
	if (x->manageFloat)
	{
		mono_runtime_invoke (x->manageFloat, x->obj, args, NULL);
	}
}

// here i look for the selector and call the right mono method
void clr_manage_list(t_clr *x, t_symbol *sl, int argc, t_atom *argv)
{
	gpointer args [2];
	int valInt;
	float valFloat;

	int i;
	if (x->loaded == 0)
	{
		error("assembly not specified");
		return;
	}

	// check if a selector is present !
	//printf("clr_manage_list, got symbol = %s\n", sl->s_name);
	if (strcmp("list", sl->s_name) == 0)
	{
		printf("lista senza selector");
		if (x->manageList)
		{
			gpointer args [1];
			MonoString *stringtmp;
			double *floattmp;
			t_atomtype_simple *typetmp;
			t_symbol *strsymbol;
			MonoArray *atoms;
			atom_simple *atom_array;
			int j;		
			char strfloat[256], strnull[256];
			sprintf(strfloat, "float");
			sprintf(strnull, "null");
			atom_array = malloc(sizeof(atom_simple)*argc);
			MonoClass *c = mono_class_from_name (x->imagePureData, "PureData", "Atom");
			atoms = mono_array_new (x->domain, c, argc);
			for (j=0; j<argc; j++)
			{
				switch ((argv+j)->a_type)
				{
				case A_FLOAT:
					atom_array[j].a_type =  A_S_FLOAT;
					atom_array[j].float_value = (double) atom_getfloat(argv+j);
					atom_array[j].string_value = mono_string_new (x->domain, strfloat);
					break;
				case A_SYMBOL:
					atom_array[j].a_type =  A_S_SYMBOL;
					strsymbol = atom_getsymbol(argv+j);
					atom_array[j].string_value = mono_string_new (x->domain, strsymbol->s_name);
					atom_array[j].float_value = 0;
					break;
				default:
					atom_array[j].a_type =  A_S_NULL;
					atom_array[j].float_value = 0;
					atom_array[j].string_value = mono_string_new (x->domain, strnull);
				}
				mono_array_set (atoms, atom_simple , j, atom_array[j]);
			}

			args[0] = atoms;
			mono_runtime_invoke (x->manageList, x->obj, args, NULL);
			return;
		} else
		{
			error("you did not specified a function to call for lists without selectors");
			return;
		}
	}
	for (i=0; i<MAX_SELECTORS; i++)
	{
		if (strcmp(x->selectors[i].sel, sl->s_name) == 0)
		{
			// I've found the selector!
			if (x->selectors[i].func)
			{
				// ParametersType {None = 0, Float=1, Symbol=2, List=3};
				switch (x->selectors[i].type)
				{
				case 0:
					mono_runtime_invoke (x->selectors[i].func, x->obj, NULL, NULL);
					break;
				case 1:
					{
						gpointer args [1];
						float val = atom_getfloat(argv);
						args[0] = &val;
						mono_runtime_invoke (x->selectors[i].func, x->obj, args, NULL);
						break;
					}
				case 2:
					{
						gpointer args [1];
						t_symbol *strsymbol;
						MonoString *strmono;
						strsymbol = atom_getsymbol(argv);
						strmono = mono_string_new (x->domain, strsymbol->s_name);
						args[0] = &strmono;
						mono_runtime_invoke (x->selectors[i].func, x->obj, args, NULL);
						// memory leak ?
						break;
					}
				case 3:
					{
						gpointer args [1];
						MonoString *stringtmp;
						double *floattmp;
						t_atomtype_simple *typetmp;
						t_symbol *strsymbol;
						MonoArray *atoms;
						atom_simple *atom_array;
						int j;		
						char strfloat[256], strnull[256];
						sprintf(strfloat, "float");
						sprintf(strnull, "null");
						atom_array = malloc(sizeof(atom_simple)*argc);
						MonoClass *c = mono_class_from_name (x->imagePureData, "PureData", "Atom");
						atoms = mono_array_new (x->domain, c, argc);
						for (j=0; j<argc; j++)
						{
							switch ((argv+j)->a_type)
							{
							case A_FLOAT:
								atom_array[j].a_type =  A_S_FLOAT;
								atom_array[j].float_value = (double) atom_getfloat(argv+j);
								atom_array[j].string_value = mono_string_new (x->domain, strfloat);
								break;
							case A_SYMBOL:
								atom_array[j].a_type =  A_S_SYMBOL;
								strsymbol = atom_getsymbol(argv+j);
								atom_array[j].string_value = mono_string_new (x->domain, strsymbol->s_name);
								atom_array[j].float_value = 0;
								break;
							default:
								atom_array[j].a_type =  A_S_NULL;
								atom_array[j].float_value = 0;
								atom_array[j].string_value = mono_string_new (x->domain, strnull);
							}
							mono_array_set (atoms, atom_simple , j, atom_array[j]);
						}

						args[0] = atoms;
						mono_runtime_invoke (x->selectors[i].func, x->obj, args, NULL);
						break;
					}
				}
				return;
			}
		}
		if (x->selectors[i].func == 0)
			i = MAX_SELECTORS;
	}
	error("clr: selector not recognized");
}

// this function is called by mono when it wants to register a selector callback
void registerMonoMethod(void *x1, MonoString *selectorString, MonoString *methodString, int type)
{
	
	char *selCstring, *metCstring;
	MonoMethod *met;
	t_clr *x;
	int this_selector, i;
	//int ret;

	
    selCstring = mono_string_to_utf8 (selectorString);
	metCstring = mono_string_to_utf8 (methodString);
	
	x = (t_clr *)x1;

	//ret = 0;
	met = 0;
	findMonoMethod( x->klass, metCstring, &met);

	if (!met)
	{
		error("method not found!");
		return;
	}

	//post("registerMonoMethod: associating %s to %s", selCstring, metCstring);

	if (selectorString->length == 0)
	{
		switch (type)
		{
		case 1: // float
			x->manageFloat = met;
			break;
		case 2: // string
			x->manageSymbol = met;
			break;
		case 3: // list
			x->manageList = met;
			break;
		case 4: // bang
			x->manageBang = met;
			break;
		}
	}

	this_selector = MAX_SELECTORS;
	for (i = 0; i < MAX_SELECTORS; i++)
	{
		if (x->selectors[i].func == 0)
		{
			// i found the first empty space
			this_selector = i;
			i = MAX_SELECTORS;
		}
		
	}
	if (this_selector == MAX_SELECTORS)
	{
		error("not enough space for selectors! MAX_SELECTORS = %i", MAX_SELECTORS);
		return;
	}

	x->selectors[this_selector].sel = selCstring;
	x->selectors[this_selector].func = met;
	x->selectors[this_selector].type = type;

	class_addmethod(clr_class, (t_method)clr_manage_list, gensym(selCstring), A_GIMME, 0);


}

// this function is called by mono when it wants to create a new inlet
void createInlet(void *x1, MonoString *selectorString, int type)
{
	// public enum ParametersType {None = 0, Float=1, Symbol=2, List=3, Bang=4, Generic=5};
	char *selCstring;
	char typeString[256];
	t_clr *x;

    selCstring = mono_string_to_utf8 (selectorString);	
	x = (t_clr *)x1;
	if (x->loaded == 0)
	{
		error("assembly not specified");
		return;
	}
	switch (type)
	{
	case 1:
		sprintf(typeString, "float");
		break;
	case 2:
		sprintf(typeString, "symbol");
		break;
	case 3:
		sprintf(typeString, "list");
		break;
	case 4:
		sprintf(typeString, "bang");
		break;
	default:
		sprintf(typeString, "");
		break;
	}
	// create the inlet
	inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym(typeString), gensym(selCstring));
}

// this function is called by mono when it wants to create a new outlet
void createOutlet(void *x1, int type)
{
	t_clr *x;
	int i = 0;
	char typeString[256];
	x = (t_clr *)x1;
	if (x->loaded == 0)
	{
		error("assembly not specified");
		return;
	}
	// public enum ParametersType {None = 0, Float=1, Symbol=2, List=3, Bang=4, Generic=5};
	switch (type)
	{
	case 1:
		sprintf(typeString, "float");
		break;
	case 2:
		sprintf(typeString, "symbol");
		break;
	case 3:
		sprintf(typeString, "list");
		break;
	case 4:
		sprintf(typeString, "bang");
		break;
	default:
		sprintf(typeString, "");
		break;
	}

	while (i < MAX_OUTLETS)
	{
		if (x->outlets[i].outlet_pointer == 0)
		{
			// empty space found!
			x->outlets[i].outlet_pointer = outlet_new(&x->x_obj, gensym(typeString));
			return;
		}
		i++;
	}
	error("the maximum number of outlets has been reached (%i)", MAX_OUTLETS);
	
}

// out to outlet
void out2outlet(void *x1, int outlet, int atoms_length, MonoArray *array)
{
	t_clr *x;
	x = (t_clr *)x1;
	t_atom *lista;
	atom_simple *atoms;
	int n;
	if (x->loaded == 0)
	{
		error("assembly not specified");
		return;
	}
	if ((outlet>MAX_OUTLETS) || (outlet<0))
	{
		error("outlet number out of range, max is %i", MAX_OUTLETS);
		return;
	}
	if (x->outlets[outlet].outlet_pointer == 0)
	{
		error("outlet %i not registered", outlet);
		return;
	}
	lista = (t_atom *) malloc(sizeof(t_atom) * atoms_length);
	atoms = (atom_simple *) malloc(sizeof(atom_simple) * atoms_length);
	for (n=0; n<atoms_length; n++)
	{
		atoms[n] = mono_array_get(array, atom_simple, n);
		char *mesCstring;
		switch (atoms[n].a_type)
		{
			case A_S_NULL:
				SETFLOAT(lista+n, (float) 0);
				break;
			case A_S_FLOAT:
				SETFLOAT(lista+n, (float) atoms[n].float_value);
				break;
			case A_S_SYMBOL:
				mesCstring = mono_string_to_utf8 (atoms[n].string_value);
				SETSYMBOL(lista+n, gensym(mesCstring));
				break;
		}

	}
	outlet_anything(x->outlets[outlet].outlet_pointer,
					gensym("list") ,
					atoms_length, 
					lista);
	free(lista);
}

// this function is called by mono when it wants post messages to pd
void post2pd(MonoString *mesString)
{
	
	char *mesCstring;
    mesCstring = mono_string_to_utf8 (mesString);
	post(mesCstring);
	
}

// this function is called by mono when it wants to post errors to pd
void error2pd(MonoString *mesString)
{
	
	char *mesCstring;
    mesCstring = mono_string_to_utf8 (mesString);
	error(mesCstring);
}
/*
//void ext_class_addbang(const char *funcName)
void ext_class_addbang(t_method funcName)
{
//	class_addbang(clr_class, (t_method)clr_bang);
	class_addbang(clr_class, funcName);
}*/

void *clr_new(t_symbol *s, int argc, t_atom *argv)
{

	int i;
	time_t a;
    t_clr *x = (t_clr *)pd_new(clr_class);

	char strtmp[256];
	x->manageBang = 0;
	x->manageSymbol = 0;
	x->manageFloat = 0;
	x->manageList = 0;
	
	if (argc==0)
	{
		x->loaded = 0;
		error("clr: you must provide a class name as the first argument");
		return (x);
	}
	x->loaded = 1;
	x->assemblyname = atom_gensym(argv);
	
	if (argc<2)
	{
		// only main class passed
		// filename by default
		sprintf(strtmp, "%s.dll", x->assemblyname->s_name);
		x->filename = gensym(strtmp);
printf(" used did not specified filename, I guess it is %s\n", strtmp);
	} else
	{
		x->filename = atom_gensym(argv+1);
	}

	// load mono, init the needed vars
	mono_load(x, argc, argv);

    return (x);
}

void clr_setup(void)
{
    clr_class = class_new(gensym("clr"), (t_newmethod)clr_new,
        (t_method)clr_free, sizeof(t_clr), CLASS_DEFAULT, A_GIMME, 0);

	class_addlist(clr_class, (t_method)clr_manage_list);
	class_addbang(clr_class, (t_method)clr_bang);
	class_addsymbol(clr_class, (t_method)clr_symbol);
	class_addfloat(clr_class, (t_method)clr_float);

	mono_initialize();
	
	// add mono to C hooks
	mono_add_internal_call ("PureData.pd::RegisterSelector", registerMonoMethod);
	mono_add_internal_call ("PureData.pd::ToOutlet", out2outlet);
	mono_add_internal_call ("PureData.pd::PostMessage", post2pd);
	mono_add_internal_call ("PureData.pd::ErrorMessage", error2pd);
	mono_add_internal_call ("PureData.pd::CreateOutlet", createOutlet);
	mono_add_internal_call ("PureData.pd::CreateInlet", createInlet);
}