/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2011 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.txt                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors: Shuhei Tanuma <chobieee@gmail.com>                          |
   +----------------------------------------------------------------------+
 */


#include "php_uv.h"

extern void php_uv_init(TSRMLS_D);
extern zend_class_entry *uv_class_entry;

static int uv_resource_handle;
static int uv_connect_handle;

void php_uv_init(TSRMLS_D);

void static destruct_uv(zend_rsrc_list_entry *rsrc TSRMLS_DC)
{
	int base_id = -1;
	php_uv_t *obj = (php_uv_t *)rsrc->ptr;
	if (obj->in_free) {
		return;
	}
	obj->in_free = 1;
	//fprintf(stderr, "will be free\n");
	
	if (obj->read_cb) {
		//fprintf(stderr, "readcb: %d\n", Z_REFCOUNT_P(obj->read_cb));
		zval_ptr_dtor(&obj->read_cb);
		obj->read_cb = NULL;
	}
	if (obj->write_cb) {
		//fprintf(stderr, "writecb: %d\n", Z_REFCOUNT_P(obj->write_cb));
		zval_ptr_dtor(&obj->write_cb);
		obj->write_cb = NULL;
	}
	if (obj->close_cb) {
		//fprintf(stderr, "closecb: %d\n", Z_REFCOUNT_P(obj->close_cb));
		zval_ptr_dtor(&obj->close_cb);
		obj->close_cb = NULL;
	}
	if (obj->listen_cb) {
		//fprintf(stderr, "listencb: %d\n", Z_REFCOUNT_P(obj->listen_cb));
		zval_ptr_dtor(&obj->listen_cb);
		obj->listen_cb = NULL;
	}
	if (obj->resource_id) {
		base_id = obj->resource_id;
		obj->resource_id = NULL;
	}

	if (obj != NULL) {
		efree(obj);
		obj = NULL;
	}
	
	if (base_id) {
		/* basically, this block always fail */
		zend_list_delete(base_id);
	}

}


PHP_MINIT_FUNCTION(uv) {
	php_uv_init(TSRMLS_C);
	uv_resource_handle = zend_register_list_destructors_ex(destruct_uv, NULL, PHP_UV_RESOURCE_NAME, module_number);
	uv_connect_handle  = zend_register_list_destructors_ex(destruct_uv, NULL, PHP_UV_CONNECT_RESOURCE_NAME, module_number);

	return SUCCESS;
}

ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_run, 0, 0, 1)
	ZEND_ARG_INFO(0, loop)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_tcp_connect, 0, 0, 2)
	ZEND_ARG_INFO(0, resource)
	ZEND_ARG_INFO(0, callback)
ZEND_END_ARG_INFO()


ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_tcp_init, 0, 0, 0)
	ZEND_ARG_INFO(0, loop)
ZEND_END_ARG_INFO()


ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_listen, 0, 0, 3)
	ZEND_ARG_INFO(0, resource)
	ZEND_ARG_INFO(0, backlog)
	ZEND_ARG_INFO(0, callback)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_accept, 0, 0, 2)
	ZEND_ARG_INFO(0, server)
	ZEND_ARG_INFO(0, client)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_read_start, 0, 0, 2)
	ZEND_ARG_INFO(0, server)
	ZEND_ARG_INFO(0, callback)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_write, 0, 0, 2)
	ZEND_ARG_INFO(0, client)
	ZEND_ARG_INFO(0, data)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_last_error, 0, 0, 1)
	ZEND_ARG_INFO(0, loop)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_timer_init, 0, 0, 1)
	ZEND_ARG_INFO(0, loop)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_timer_start, 0, 0, 4)
	ZEND_ARG_INFO(0, timer)
	ZEND_ARG_INFO(0, timeout)
	ZEND_ARG_INFO(0, repeat)
	ZEND_ARG_INFO(0, callback)
ZEND_END_ARG_INFO()


ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_tcp_bind, 0, 0, 1)
	ZEND_ARG_INFO(0, resource)
	ZEND_ARG_INFO(0, address)
	ZEND_ARG_INFO(0, port)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_uv_close, 0, 0, 1)
	ZEND_ARG_INFO(0, stream)
ZEND_END_ARG_INFO()


PHP_FUNCTION(uv_run)
{
	uv_run(uv_default_loop());
}

static void php_uv_tcp_connect_cb(uv_connect_t *conn_req, int status)
{
	fprintf(stderr,"status: %d\n", status);
}


PHP_FUNCTION(uv_tcp_bind)
{
	zval *resource;
	char *address;
	int address_len;
	long port = 8080;
	struct sockaddr_in addr;
	php_uv_t *uv;
	int r;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
		"zsl",&resource, &address, &address_len, &port) == FAILURE) {
		return;
	}
	
	ZEND_FETCH_RESOURCE(uv, php_uv_t *, &resource, -1, PHP_UV_RESOURCE_NAME, uv_resource_handle);
	addr = uv_ip4_addr(address, port);
	
	r = uv_tcp_bind((uv_tcp_t*)&uv->uv.tcp, addr);
	if (r) {
		fprintf(stderr,"bind error %d\n", r);
	}
}

static void php_uv_write_cb(uv_write_t* req, int status)
{
	TSRMLS_FETCH();
	zval *retval_ptr, *stat, *client= NULL;
	zval **params[2];
	zend_fcall_info fci;
	zend_fcall_info_cache fcc;
	char *is_callable_error = NULL;

	php_uv_t *uv = (php_uv_t*)req->data;
	
	if(zend_fcall_info_init(uv->write_cb, 0, &fci,&fcc,NULL,&is_callable_error TSRMLS_CC) == SUCCESS) {
		if (is_callable_error) {
			fprintf(stderr,"to be a valid callback\n");
		}
	}
	
	/* for now */
	fci.retval_ptr_ptr = &retval_ptr;

	MAKE_STD_ZVAL(stat);
	ZVAL_LONG(stat, status);
	
	MAKE_STD_ZVAL(client);
	ZVAL_RESOURCE(client, uv->resource_id);
	zend_list_addref(uv->resource_id);

	params[0] = &stat;
	params[1] = &client;
	
	fci.params = params;
	fci.param_count = 2;
	
	zend_call_function(&fci, &fcc TSRMLS_CC);
	zval_ptr_dtor(&retval_ptr);
	zval_ptr_dtor(&stat);
	zval_ptr_dtor(&client);
	efree(req);
}

PHP_FUNCTION(uv_write)
{
	zval *z_cli,*callback;
	char *data;
	int data_len = 0;
	uv_buf_t buf;
	php_uv_t *client;
	uv_write_t *w;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
		"zsz",&z_cli, &data, &data_len,&callback) == FAILURE) {
		return;
	}
	
	ZEND_FETCH_RESOURCE(client, php_uv_t *, &z_cli, -1, PHP_UV_RESOURCE_NAME, uv_resource_handle);
	zend_list_addref(client->resource_id);
	Z_ADDREF_P(callback);
	client->write_cb = callback;

	w = emalloc(sizeof(uv_write_t));
	w->data = client;
	buf = uv_buf_init(data, data_len);
	uv_write(w, &client->uv.tcp, &buf, 1, php_uv_write_cb);
}

PHP_FUNCTION(uv_accept)
{
	zval *z_svr,*z_cli;
	php_uv_t *server, *client;
	int r;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
		"zz",&z_svr, &z_cli) == FAILURE) {
		return;
	}
	
	ZEND_FETCH_RESOURCE(server, php_uv_t *, &z_svr, -1, PHP_UV_RESOURCE_NAME, uv_resource_handle);
	ZEND_FETCH_RESOURCE(client, php_uv_t *, &z_cli, -1, PHP_UV_RESOURCE_NAME, uv_resource_handle);
	
	r = uv_accept((uv_stream_t *)&server->uv.tcp, (uv_stream_t *)&client->uv.tcp);
	if (r) {
		fprintf(stderr, "failed");
	}
}


static void php_uv_listen_cb(uv_stream_t* server, int status)
{
	TSRMLS_FETCH();
	zval *retval_ptr, *svr= NULL;
	zval **params[1];
	zend_fcall_info fci;
	zend_fcall_info_cache fcc;
	char *is_callable_error = NULL;

	php_uv_t *uv = (php_uv_t*)server->data;
	
	if(zend_fcall_info_init(uv->listen_cb, 0, &fci,&fcc,NULL,&is_callable_error TSRMLS_CC) == SUCCESS) {
		if (is_callable_error) {
			fprintf(stderr,"to be a valid callback\n");
		}
	}
	
	/* for now */
	fci.retval_ptr_ptr = &retval_ptr;

	MAKE_STD_ZVAL(svr);
	ZVAL_RESOURCE(svr, uv->resource_id);
	zend_list_addref(uv->resource_id);

	params[0] = &svr;
	
	fci.params = params;
	fci.param_count = 1;
	
	zend_call_function(&fci, &fcc TSRMLS_CC);
	zval_ptr_dtor(&retval_ptr);
	zval_ptr_dtor(&svr);
}

static void php_uv_read_cb(uv_stream_t* handle, ssize_t nread, uv_buf_t buf)
{
	TSRMLS_FETCH();
	zval *retval_ptr = NULL;
	zval **params[2];
	zval *buffer;
	zend_fcall_info fci;
	zend_fcall_info_cache fcc;
	char *is_callable_error = NULL;

	php_uv_t *uv = (php_uv_t*)handle->data;
	if(zend_fcall_info_init(uv->read_cb, 0, &fci, &fcc, NULL, &is_callable_error TSRMLS_CC) == SUCCESS) {
		if (is_callable_error) {
			fprintf(stderr,"to be a valid callback\n");
		}
	}
	
	// for now
	fci.retval_ptr_ptr = &retval_ptr;

	MAKE_STD_ZVAL(buffer);
	ZVAL_STRING(buffer,buf.base, 1);

	zval *rsc;
	MAKE_STD_ZVAL(rsc);
	ZVAL_RESOURCE(rsc, uv->resource_id);
	//zend_list_addref(uv->resource_id);

	params[0] = &buffer;
	params[1] = &rsc;
	
	fci.params = params;
	fci.param_count = 2;
	
	//zend_fcall_info_args(&fci, *params TSRMLS_CC);
	zend_call_function(&fci, &fcc TSRMLS_CC);
	//zend_fcall_info_args_clear(&fcc, 1);
	zval_ptr_dtor(&buffer);
	zval_ptr_dtor(&rsc);
	zval_ptr_dtor(&retval_ptr);
}

static uv_buf_t php_uv_read_alloc(uv_handle_t* handle, size_t suggested_size)
{
	return uv_buf_init(malloc(suggested_size), suggested_size);
}


static void php_uv_close_cb(uv_handle_t *handle)
{
	TSRMLS_FETCH();
	zval *retval_ptr = NULL;
	zval **params[1];
	zval *h;
	zend_fcall_info fci;
	zend_fcall_info_cache fcc;
	char *is_callable_error = NULL;

	php_uv_t *uv = (php_uv_t*)handle->data;
	if(zend_fcall_info_init(uv->close_cb, 0, &fci, &fcc, NULL, &is_callable_error TSRMLS_CC) == SUCCESS) {
		if (is_callable_error) {
			fprintf(stderr,"to be a valid callback\n");
		}
	}
	
	// for now
	fci.retval_ptr_ptr = &retval_ptr;

	MAKE_STD_ZVAL(h);
	ZVAL_RESOURCE(h, uv->resource_id);

	params[0] = &h;
	
	fci.params = params;
	fci.param_count = 1;
	
	//zend_fcall_info_args(&fci, *params TSRMLS_CC);
	zend_call_function(&fci, &fcc TSRMLS_CC);
	//zend_fcall_info_args_clear(&fcc, 1);
	zval_ptr_dtor(&retval_ptr);
	zval_ptr_dtor(&h);
	/* for testing resource ref count.
	{
		zend_rsrc_list_entry *le;
		if (zend_hash_index_find(&EG(regular_list), uv->resource_id, (void **) &le)==SUCCESS) {
			printf("del(%d): %d->%d\n", uv->resource_id, le->refcount, le->refcount-1);
		} else {
			printf("can't find");
		}
	}
	*/
}

PHP_FUNCTION(uv_close)
{
	zval *client, *callback;
	php_uv_t *uv;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
		"rz",&client, &callback) == FAILURE) {
		return;
	}

	ZEND_FETCH_RESOURCE(uv, php_uv_t *, &client, -1, PHP_UV_RESOURCE_NAME, uv_resource_handle);
	Z_ADDREF_P(callback);

	uv->close_cb = callback;
	uv_close((uv_stream_t*)&uv->uv.tcp, php_uv_close_cb);
}


PHP_FUNCTION(uv_read_start)
{
	zval *client, *callback;
	php_uv_t *uv;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
		"rz",&client, &callback) == FAILURE) {
		return;
	}

	ZEND_FETCH_RESOURCE(uv, php_uv_t *, &client, -1, PHP_UV_RESOURCE_NAME, uv_resource_handle);
	Z_ADDREF_P(callback);
	zend_list_addref(uv->resource_id);

	uv->read_cb = callback;
	uv->uv.tcp.data = uv;

	uv_read_start((uv_stream_t*)&uv->uv.tcp, php_uv_read_alloc, php_uv_read_cb);
}

PHP_FUNCTION(uv_listen)
{
	zval *resource, *callback;
	long backlog = SOMAXCONN;
	php_uv_t *uv;
	int r;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
		"zlz",&resource, &backlog, &callback) == FAILURE) {
		return;
	}
	
	ZEND_FETCH_RESOURCE(uv, php_uv_t *, &resource, -1, PHP_UV_RESOURCE_NAME, uv_resource_handle);
	Z_ADDREF_P(callback);
	uv->listen_cb = callback;
	zend_list_addref(uv->resource_id);

	r = uv_listen((uv_stream_t*)&uv->uv.tcp, backlog, php_uv_listen_cb);
	if (r) {
		fprintf(stderr, "damepo");
	}
}

PHP_FUNCTION(uv_tcp_connect)
{
	zval *resource;
	php_uv_t *uv;
	zend_fcall_info fci = {
		0,NULL,NULL,NULL,NULL,0,NULL,NULL
	};
	zend_fcall_info_cache fci_cache;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
		"zf",&resource,&fci,&fci_cache) == FAILURE) {
		return;
	}
	
	ZEND_FETCH_RESOURCE(uv, php_uv_t *, &resource, -1, PHP_UV_RESOURCE_NAME, uv_resource_handle);
	//uv->fci_connect = fci;
	//uv->fcc_connect = fci_cache;
	
	//uv_tcp_connect(uv->connect, uv->socket, uv->addr, php_uv_tcp_connect_cb);
}

PHP_FUNCTION(uv_timer_init)
{
	int r;
	/* TODO */
	zval *loop;
	php_uv_t *uv;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
		"|z",&loop) == FAILURE) {
		return;
	}

	uv = (php_uv_t *)emalloc(sizeof(php_uv_t));

	r = uv_timer_init(uv_default_loop(), &uv->uv.timer);
	if (r) {
		fprintf(stderr, "Socket creation error\n");
		return;
	}
	uv->uv.timer.data = uv;
	uv->listen_cb   = NULL;
	uv->read_cb     = NULL;
	uv->write_cb    = NULL;
	uv->close_cb    = NULL;
	uv->timer_cb    = NULL;
	
	ZEND_REGISTER_RESOURCE(return_value, uv, uv_resource_handle);
	uv->resource_id = Z_LVAL_P(return_value);
}

static void php_uv_timer_cb(uv_timer_t *handle, int status)
{
	TSRMLS_FETCH();
	zval *retval_ptr, *stat, *client= NULL;
	zval **params[2];
	zend_fcall_info fci;
	zend_fcall_info_cache fcc;
	char *is_callable_error = NULL;

	php_uv_t *uv = (php_uv_t*)handle->data;
	
	if(zend_fcall_info_init(uv->timer_cb, 0, &fci,&fcc,NULL,&is_callable_error TSRMLS_CC) == SUCCESS) {
		if (is_callable_error) {
			fprintf(stderr,"to be a valid callback\n");
		}
	}
	
	/* for now */
	fci.retval_ptr_ptr = &retval_ptr;

	MAKE_STD_ZVAL(stat);
	ZVAL_LONG(stat, status);
	MAKE_STD_ZVAL(client);
	ZVAL_RESOURCE(client, uv->resource_id);
	zend_list_addref(uv->resource_id);

	params[0] = &stat;
	params[1] = &client;
	
	fci.params = params;
	fci.param_count = 2;
	
	zend_call_function(&fci, &fcc TSRMLS_CC);

	zval_ptr_dtor(&retval_ptr);
	zval_ptr_dtor(&stat);
	zval_ptr_dtor(&client);
}

PHP_FUNCTION(uv_timer_start)
{
//int uv_timer_start(uv_timer_t* handle, uv_timer_cb timer_cb, int64_t timeout,int64_t repeat) {
	zval *timer, *callback;
	php_uv_t *uv;
	long timeout, repeat = 0;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
		"rllz",&timer, &timeout, &repeat, &callback) == FAILURE) {
		return;
	}

	ZEND_FETCH_RESOURCE(uv, php_uv_t *, &timer, -1, PHP_UV_RESOURCE_NAME, uv_resource_handle);
	Z_ADDREF_P(callback);

	uv->timer_cb = callback;
	uv_timer_start((uv_timer_t*)&uv->uv.timer, php_uv_timer_cb, timeout, repeat);
}


PHP_FUNCTION(uv_tcp_init)
{
	int r;
	/* TODO */
	zval *loop;
	php_uv_t *uv;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
		"|z",&loop) == FAILURE) {
		return;
	}

	uv = (php_uv_t *)emalloc(sizeof(php_uv_t));
	if (!uv) {
		fprintf(stderr, "emalloc error\n");
		return;
	}

	r = uv_tcp_init(uv_default_loop(), &uv->uv.tcp);
	if (r) {
		fprintf(stderr, "Socket creation error\n");
		return;
	}
	
	uv->uv.tcp.data = uv;
	uv->listen_cb   = NULL;
	uv->read_cb     = NULL;
	uv->write_cb    = NULL;
	uv->close_cb    = NULL;
	uv->timer_cb    = NULL;
	
	ZEND_REGISTER_RESOURCE(return_value, uv, uv_resource_handle);
	uv->resource_id = Z_LVAL_P(return_value);
}

PHP_FUNCTION(uv_last_error)
{
	/* TODO */
	uv_loop_t *loop;
	uv_err_t err;

	loop = uv_default_loop();
	err = uv_last_error(loop);
		
	RETVAL_LONG(err.code);
}

static zend_function_entry uv_functions[] = {
	PHP_FE(uv_run, arginfo_uv_run)
	PHP_FE(uv_timer_init, arginfo_uv_timer_init)
	PHP_FE(uv_timer_start, arginfo_uv_timer_start)
	PHP_FE(uv_tcp_init, arginfo_uv_tcp_init)
	PHP_FE(uv_tcp_bind, arginfo_uv_tcp_bind)
	PHP_FE(uv_listen, arginfo_uv_listen)
	PHP_FE(uv_accept, arginfo_uv_accept)
	PHP_FE(uv_write, arginfo_uv_write)
	PHP_FE(uv_close, arginfo_uv_close)
	PHP_FE(uv_read_start, arginfo_uv_read_start)
	PHP_FE(uv_tcp_connect, arginfo_uv_tcp_connect)
	PHP_FE(uv_last_error, arginfo_uv_last_error)
	{NULL, NULL, NULL}
};


PHP_MINFO_FUNCTION(uv)
{
	php_printf("PHP libuv Extension\n");
}

zend_module_entry uv_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
	STANDARD_MODULE_HEADER,
#endif
	"uv",
	uv_functions,					/* Functions */
	PHP_MINIT(uv),	/* MINIT */
	NULL,					/* MSHUTDOWN */
	NULL,					/* RINIT */
	NULL,					/* RSHUTDOWN */
	PHP_MINFO(uv),	/* MINFO */
#if ZEND_MODULE_API_NO >= 20010901
	PHP_UV_EXTVER,
#endif
	STANDARD_MODULE_PROPERTIES
};


#ifdef COMPILE_DL_UV
ZEND_GET_MODULE(uv)
#endif