/**
 * Navit, a modular navigation system.
 * Copyright (C) 2005-2008 Navit Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 */

#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <glib.h>
#ifndef _MSC_VER
#include <sys/time.h>
#endif /* _MSC_VER */
#include "config.h"
#include "file.h"
#include "item.h"
#include "debug.h"

extern long global_last_spoken_base;

#ifdef HAVE_API_ANDROID
#include <android/log.h>
#endif

#if defined HAVE_API_WIN32_CE || defined _MSC_VER
#include <windows.h>
#include <windowsx.h>
#endif

#ifdef HAVE_SOCKET
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
static int debug_socket=-1;
static struct sockaddr_in debug_sin;
#endif

int debug_level = 0;
int segv_level = 0;
int timestamp_prefix = 0;

int global_func_indent_counter = -1;
const char* global_func_indent_spaces = "                             ";

static int dummy;
static GHashTable *debug_hash;
static gchar *gdb_program;

static FILE *debug_fp;

// func def ------ this is bad!!
void android_send_generic_text(int id, char *text);
// func def ------ this is bad!!

#if defined(_WIN32) || defined(__CEGCC__)

static void sigsegv(int sig)
{
}

#else
#include <unistd.h>
static void sigsegv(int sig)
{
	char buffer[256];
	if (segv_level > 1)
		sprintf(buffer, "gdb -ex bt %s %d", gdb_program, getpid());
	else
		sprintf(buffer, "gdb -ex bt -ex detach -ex quit %s %d", gdb_program, getpid());
	system(buffer);
	exit(1);
}
#endif

void debug_init(const char *program_name)
{
//	gdb_program = g_strdup(program_name); // L
//	signal(SIGSEGV, sigsegv); // L
	debug_hash = g_hash_table_new_full(g_str_hash, g_str_equal, g_free_func, NULL);
	debug_fp = stderr;
}

static void debug_update_level(gpointer key, gpointer value, gpointer user_data)
{
	if (debug_level < GPOINTER_TO_INT(value))
		debug_level = GPOINTER_TO_INT(value);
}

void debug_level_set(const char *name, int level)
{
	if (!strcmp(name, "segv"))
	{
		segv_level = level;
		if (segv_level)
			signal(SIGSEGV, sigsegv);
		else
			signal(SIGSEGV, NULL);
	}
	else if (!strcmp(name, "timestamps"))
	{
		timestamp_prefix = level;
	}
	else
	{
		debug_level = 0;
		g_hash_table_insert(debug_hash, g_strdup(name), GINT_TO_POINTER(level));
		g_hash_table_foreach(debug_hash, debug_update_level, NULL);
	}
}

struct debug *
debug_new(struct attr *parent, struct attr **attrs)
{
	struct attr *name, *level;
	name = attr_search(attrs, NULL, attr_name);
	level = attr_search(attrs, NULL, attr_level);
#ifdef HAVE_SOCKET
	if (!name && !level)
	{
		struct attr *socket_attr=attr_search(attrs, NULL, attr_socket);
		char *p,*s;

		if (!socket_attr)
			return NULL;

		s=g_strdup(socket_attr->u.str);
		p=strchr(s,':');
		if (!p)
		{
			g_free(s);
			return NULL;
		}
		*p++='\0';
		debug_sin.sin_family=AF_INET;
		if (!inet_aton(s, &debug_sin.sin_addr))
		{
			g_free(s);
			return NULL;
		}
		debug_sin.sin_port=ntohs(atoi(p));
		if (debug_socket == -1)
		debug_socket=socket(PF_INET, SOCK_DGRAM, 0);
		g_free(s);
		return (struct debug *)&dummy;
	}
#endif
	if (!name || !level)
		return NULL;

	debug_level_set(name->u.str, level->u.num);

	return (struct debug *) &dummy;
}

int debug_level_get(const char *name)
{
	if (!debug_hash)
		return 0;

	return GPOINTER_TO_INT(g_hash_table_lookup(debug_hash, name));
}

void debug_get_timestamp_millis(long *ts_millis)
{

//  struct timeval
//  {
//      time_t      tv_sec;     /* seconds */
//      suseconds_t tv_usec;    /* microseconds */
//  };

	struct timeval tv;

	if (gettimeofday(&tv, NULL) == -1)
	{
		ts_millis = -1;
		return;
	}

	if (global_last_spoken_base != 0)
	{
		*ts_millis = (((long)tv.tv_sec - global_last_spoken_base) * 1000) + ((int)tv.tv_usec / 1000);
	}
	else
	{
		*ts_millis = ((long)tv.tv_sec * 1000) + ((int)tv.tv_usec / 1000);
	}
}


static void debug_timestamp(char *buffer)
{
#if defined HAVE_API_WIN32_CE || defined _MSC_VER
	LARGE_INTEGER counter, frequency;
	double val;
	QueryPerformanceCounter(&counter);
	QueryPerformanceFrequency(&frequency);
	val=counter.HighPart * 4294967296.0 + counter.LowPart;
	val/=frequency.HighPart * 4294967296.0 + frequency.LowPart;
	sprintf(buffer,"%.6f|",val);

#else
	struct timeval tv;

	if (gettimeofday(&tv, NULL) == -1)
		return;
	/* Timestamps are UTC */
	sprintf(buffer, "%02d:%02d:%02d.%03d|", (int) (tv.tv_sec / 3600) % 24, (int) (tv.tv_sec / 60) % 60, (int) tv.tv_sec % 60, (int) tv.tv_usec / 1000);
#endif
}

#ifdef HAVE_API_ANDROID

/* Android log priority values, in ascending priority order. */
/*
typedef enum android_LogPriority {
ANDROID_LOG_UNKNOWN = 0,
ANDROID_LOG_DEFAULT,
ANDROID_LOG_VERBOSE,
ANDROID_LOG_DEBUG,
ANDROID_LOG_INFO,
ANDROID_LOG_WARN,
ANDROID_LOG_ERROR,
ANDROID_LOG_FATAL,
ANDROID_LOG_SILENT,
} android_LogPriority; 
*/

static android_LogPriority
dbg_level_to_android(dbg_level level)
{
	switch(level) {
		case lvl_unset:
			return ANDROID_LOG_UNKNOWN;
		case lvl_error:
			return ANDROID_LOG_ERROR;
		case lvl_warning:
			return ANDROID_LOG_WARN;
		case lvl_info:
			return ANDROID_LOG_INFO;
		case lvl_debug:
			return ANDROID_LOG_DEBUG;
	}
	return ANDROID_LOG_UNKNOWN;
}
#endif

void debug_vprintf(int level, const char *module, const int mlen, const char *function, const int flen, int prefix, const char *fmt, va_list ap)
{
#if defined HAVE_API_WIN32_CE || defined _MSC_VER
	char buffer[4096];
#else
	char buffer[mlen + flen + 3];
#endif

	sprintf(buffer, "%s:%s", module, function);
	if (debug_level_get(module) >= level || debug_level_get(buffer) >= level)
	{
#if defined(DEBUG_WIN32_CE_MESSAGEBOX)
		wchar_t muni[4096];
#endif
		char xbuffer[4096];
		xbuffer[0] = '\0';
		if (prefix)
		{
			if (timestamp_prefix)
				debug_timestamp(xbuffer);
			strcpy(xbuffer + strlen(xbuffer), buffer);
			strcpy(xbuffer + strlen(xbuffer), ":");
		}
		vsprintf(xbuffer + strlen(xbuffer), fmt, ap);
#ifdef DEBUG_WIN32_CE_MESSAGEBOX
		mbstowcs(muni, xbuffer, strlen(xbuffer)+1);
		MessageBoxW(NULL, muni, TEXT("Navit - Error"), MB_APPLMODAL|MB_OK|MB_ICONERROR);
#else
#ifdef HAVE_API_ANDROID
		__android_log_print(dbg_level_to_android(lvl_info), "navit", "%s", xbuffer);
#else
#ifdef HAVE_SOCKET
		if (debug_socket != -1)
		{
			sendto(debug_socket, xbuffer, strlen(xbuffer), 0, (struct sockaddr *)&debug_sin, sizeof(debug_sin));
			return;
		}
#endif
		FILE *fp = debug_fp;

		if (!fp)
		{
			fp = stderr;
		}

		fprintf(fp, "%s", xbuffer);
		fflush(fp);
#endif
#endif
	}
}



void debug_vprintf_func(int level, int indent, const char *module, const int mlen, const char *function, const int flen, int prefix, const char *fmt, va_list ap)
{
#if defined HAVE_API_WIN32_CE || defined _MSC_VER
	char buffer[4096];
#else
	char buffer[mlen + flen + 3];
#endif

	sprintf(buffer, "FUNC:%.*s%s:%s", abs(2 * indent), global_func_indent_spaces, module, function);
	if (debug_level_get(module) >= level || debug_level_get(buffer) >= level)
	{
#if defined(DEBUG_WIN32_CE_MESSAGEBOX)
		wchar_t muni[4096];
#endif
		char xbuffer[4096];
		xbuffer[0] = '\0';
		if (prefix)
		{
			if (timestamp_prefix)
				debug_timestamp(xbuffer);
			strcpy(xbuffer + strlen(xbuffer), buffer);
			strcpy(xbuffer + strlen(xbuffer), ":");
		}
		vsprintf(xbuffer + strlen(xbuffer), fmt, ap);
#ifdef DEBUG_WIN32_CE_MESSAGEBOX
		mbstowcs(muni, xbuffer, strlen(xbuffer)+1);
		MessageBoxW(NULL, muni, TEXT("Navit - Error"), MB_APPLMODAL|MB_OK|MB_ICONERROR);
#else
#ifdef HAVE_API_ANDROID
		__android_log_print(dbg_level_to_android(lvl_info), "navit", "%s", xbuffer);
#else
#ifdef HAVE_SOCKET
		if (debug_socket != -1)
		{
			sendto(debug_socket, xbuffer, strlen(xbuffer), 0, (struct sockaddr *)&debug_sin, sizeof(debug_sin));
			return;
		}
#endif
		FILE *fp = debug_fp;

		if (!fp)
		{
			fp = stderr;
		}

		fprintf(fp, "%s", xbuffer);
		fflush(fp);
#endif
#endif
	}
}


void debug_for_tests_vprintf(int level, const char *fmt, va_list ap)
{
#ifdef _CIDEBUG_BUILD_
#ifdef HAVE_API_ANDROID
	char *xbuffer = g_malloc(40960);
	xbuffer[0] = '\0';
	vsprintf(xbuffer, fmt, ap);
	android_send_generic_text(32, xbuffer);
	g_free(xbuffer);
#endif
#endif
}


void debug_for_tests2_vprintf(int level, const char *fmt, va_list ap)
{
#ifdef HAVE_API_ANDROID
	char *xbuffer = g_malloc(40960);
	xbuffer[0] = '\0';
	vsprintf(xbuffer, fmt, ap);
	android_send_generic_text(33, xbuffer);
	g_free(xbuffer);
#endif
}

void debug_for_tests2_printf(int level, const char *fmt, ...)
{
#ifdef HAVE_API_ANDROID
	va_list ap;
	va_start(ap, fmt);
	debug_for_tests2_vprintf(level, fmt, ap);
	va_end(ap);
#endif
}


void debug_for_tests_printf(int level, const char *fmt, ...)
{
#ifdef _CIDEBUG_BUILD_
#ifdef HAVE_API_ANDROID
	va_list ap;
	va_start(ap, fmt);
	debug_for_tests_vprintf(level, fmt, ap);
	va_end(ap);
#endif
#endif
}

void debug_printf(int level, const char *module, const int mlen, const char *function, const int flen, int prefix, const char *fmt, ...)
{
#ifdef _DEBUG_BUILD_
	va_list ap;
	va_start(ap, fmt);
	debug_vprintf(level, module, mlen, function, flen, prefix, fmt, ap);
	va_end(ap);
#endif
}

void debug_printf_func(int level, int indent, const char *module, const int mlen, const char *function, const int flen, int prefix, const char *fmt, ...)
{
#ifdef _DEBUG_BUILD_
	va_list ap;
	va_start(ap, fmt);
	debug_vprintf_func(level, indent, module, mlen, function, flen, prefix, fmt, ap);
	va_end(ap);
#endif
}

void debug_printf2(int level, const char *module, const int mlen, const char *function, const int flen, int prefix, const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	debug_vprintf(level, module, mlen, function, flen, prefix, fmt, ap);
	va_end(ap);
}

void debug_assert_fail(const char *module, const int mlen, const char *function, const int flen, const char *file, int line, const char *expr)
{
	debug_printf2(0, module, mlen, function, flen, 1, "%s:%d assertion failed:%s\n", file, line, expr);
	abort();
}

void debug_destroy(void)
{
	if (!debug_fp)
		return;
	if (debug_fp == stderr || debug_fp == stdout)
		return;
	fclose(debug_fp);
	debug_fp = NULL;
}

void debug_set_logfile(const char *path)
{
	FILE *fp;
	fp = fopen(path, "a");
	if (fp)
	{
		debug_destroy();
		debug_fp = fp;
		fprintf(debug_fp, "Navit log started\n");
		fflush(debug_fp);
	}
}

struct malloc_head
{
	int magic;
	int size;
	char *where;
	void *return_address[8];
	struct malloc_head *prev;
	struct malloc_head *next;
}*malloc_heads;

struct malloc_tail
{
	int magic;
};

int mallocs, malloc_size, malloc_size_m;

void debug_dump_mallocs(void)
{
	struct malloc_head *head = malloc_heads;
	int i;
	dbg(0, "mallocs %d\n", mallocs);
	while (head)
	{
		fprintf(stderr, "unfreed malloc from %s of size %d\n", head->where, head->size);
		for (i = 0; i < 8; i++)
			fprintf(stderr, "\tlist *%p\n", head->return_address[i]);
#if 0
		fprintf(stderr,"%s\n",head+1);
#endif
		head = head->next;
	}
}

void *
debug_malloc(const char *where, int line, const char *func, int size)
{
	struct malloc_head *head;
	struct malloc_tail *tail;
	if (!size)
		return NULL;
	mallocs++;
	malloc_size += size;
	if (malloc_size / (1024 * 1024) != malloc_size_m)
	{
		malloc_size_m = malloc_size / (1024 * 1024);
		dbg(0, "malloced %d kb\n", malloc_size / 1024);
	}
	head = malloc(size + sizeof(*head) + sizeof(*tail));
	head->magic = 0xdeadbeef;
	head->size = size;
	head->prev = NULL;
	head->next = malloc_heads;
	malloc_heads = head;
	if (head->next)
		head->next->prev = head;
	head->where = g_strdup_printf("%s:%d %s", where, line, func);
#if !defined (__GNUC__)
#define __builtin_return_address(x) NULL
#endif
	head->return_address[0] = __builtin_return_address(0);
	head->return_address[1] = __builtin_return_address(1);
	head->return_address[2] = __builtin_return_address(2);
	head->return_address[3] = __builtin_return_address(3);
	head->return_address[4] = __builtin_return_address(4);
	head->return_address[5] = __builtin_return_address(5);
	head->return_address[6] = __builtin_return_address(6);
	head->return_address[7] = __builtin_return_address(7);
	head++;
	tail = (struct malloc_tail *) ((unsigned char *) head + size);
	tail->magic = 0xdeadbef0;
	return head;
}

void *
debug_malloc0(const char *where, int line, const char *func, int size)
{
	void *ret = debug_malloc(where, line, func, size);
	if (ret)
		memset(ret, 0, size);
	return ret;
}

void *
debug_realloc(const char *where, int line, const char *func, void *ptr, int size)
{
	void *ret = debug_malloc(where, line, func, size);
	if (ret && ptr)
		memcpy(ret, ptr, size);
	debug_free(where, line, func, ptr);
	return ret;
}

char *
debug_strdup(const char *where, int line, const char *func, const char *ptr)
{
	int size;
	char *ret;

	if (!ptr)
		return NULL;
	size = strlen(ptr) + 1;
	ret = debug_malloc(where, line, func, size);
	memcpy(ret, ptr, size);
	return ret;
}

char *
debug_guard(const char *where, int line, const char *func, char *str)
{
	char *ret = debug_strdup(where, line, func, str);
	g_free(str);
	return ret;
}

void debug_free(const char *where, int line, const char *func, void *ptr)
{
	struct malloc_head *head;
	struct malloc_tail *tail;
	if (!ptr)
		return;
	mallocs--;
	head = (struct malloc_head *) ((unsigned char *) ptr - sizeof(*head));
	tail = (struct malloc_tail *) ((unsigned char *) ptr + head->size);
	malloc_size -= head->size;
	if (head->magic != 0xdeadbeef || tail->magic != 0xdeadbef0)
	{
		fprintf(stderr, "Invalid free from %s:%d %s\n", where, line, func);
	}
	head->magic = 0;
	tail->magic = 0;
	if (head->prev)
		head->prev->next = head->next;
	else
		malloc_heads = head->next;
	if (head->next)
		head->next->prev = head->prev;
	free(head->where);
	free(head);
}

void debug_free_func(void *ptr)
{
	debug_free("unknown", 0, "unknown", ptr);
}

clock_t debug_measure_start(void)
{
	clock_t start = clock();
	return start;
}

clock_t debug_measure_end(clock_t start_time)
{
	clock_t diff_time = clock() - start_time;
	return diff_time;
}

int debug_measure_end_tsecs(clock_t start_time)
{
	clock_t diff_time = clock() - start_time;
	return (int) (((double) diff_time / (double) CLOCKS_PER_SEC) * 1000);
}

void debug_measure_result_str(clock_t diff, char *buffer)
{
	sprintf(buffer, "elapsed: %fs\n", (diff / CLOCKS_PER_SEC));
}

void debug_mrp(const char* function_name, clock_t diff)
{
	dbg(0, "el:(%s) %fs\n", function_name, (double) ((double) diff / (double) CLOCKS_PER_SEC));
}

void debug_finished(void)
{
	debug_dump_mallocs();
	g_free(gdb_program);
	g_hash_table_destroy(debug_hash);
	debug_destroy();
}