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/*
 * media-thumbnail-server
 *
 * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.
 *
 * Contact: Hyunjun Ko <zzoon.ko@samsung.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#include "thumb-server-internal.h"
#include "media-thumb-util.h"
#include "media-thumb-debug.h"

#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <Ecore_Evas.h>
#include <tzplatform_config.h>

#ifdef LOG_TAG
#undef LOG_TAG
#endif

#define LOG_TAG "MEDIA_THUMBNAIL_SERVER"
#define THUMB_DEFAULT_WIDTH 320
#define THUMB_DEFAULT_HEIGHT 240
#define THUMB_BLOCK_SIZE 512
#define THUMB_COMM_SOCK_PATH tzplatform_mkpath(TZ_SYS_RUN, "media-server/media_ipc_thumbcomm.socket")
#define THUMB_EMPTY_STR ""

GMainLoop *g_thumb_server_mainloop; // defined in thumb-server.c as extern

static gboolean __thumb_server_send_msg_to_agent(int msg_type);
static gboolean _thumb_server_send_deny_message(int sockfd);

gboolean _thumb_daemon_start_jobs(gpointer data)
{
	thumb_dbg("");
	/* Initialize ecore-evas to use evas library */
	ecore_evas_init();

	__thumb_server_send_msg_to_agent(MS_MSG_THUMB_SERVER_READY);

	return FALSE;
}

void _thumb_daemon_finish_jobs(void)
{
	/* Shutdown ecore-evas */
	ecore_evas_shutdown();
	g_main_loop_quit(g_thumb_server_mainloop);

	return;
}

int _thumb_daemon_process_job(thumbMsg *req_msg, thumbMsg *res_msg)
{
	int err = MS_MEDIA_ERR_NONE;

	if (req_msg->msg_type == THUMB_REQUEST_RAW_DATA) {
		err = _media_thumb_process_raw(req_msg, res_msg);
		if (err != MS_MEDIA_ERR_NONE)
			thumb_warn("_media_thumb_process_raw is failed: %d", err);
	} else if (req_msg->msg_type == THUMB_REQUEST_DB_INSERT) {
		err = _media_thumb_process(req_msg, res_msg);
		if (err != MS_MEDIA_ERR_NONE)
			thumb_warn("_media_thumb_process is failed: %d", err);
	}

	return err;
}

gboolean _thumb_server_read_socket(GIOChannel *src, GIOCondition condition, gpointer data)
{
	struct sockaddr_un client_addr;
	unsigned int client_addr_len;
	thumbMsg recv_msg;
	thumbMsg res_msg;
	ms_peer_credentials credentials;

	int sock = -1;
	int client_sock = -1;

	memset((void *)&recv_msg, 0, sizeof(recv_msg));
	memset((void *)&res_msg, 0, sizeof(res_msg));
	memset((void *)&credentials, 0, sizeof(credentials));

	sock = g_io_channel_unix_get_fd(src);
	if (sock < 0) {
		thumb_err("sock fd is invalid!");
		return TRUE;
	}

	client_addr_len = sizeof(client_addr);

	if ((client_sock = accept(sock, (struct sockaddr*)&client_addr, &client_addr_len)) < 0) {
		thumb_stderror("accept failed");
		return TRUE;
	}

	if (ms_cynara_receive_untrusted_message_thumb(client_sock, &recv_msg, &credentials) != MS_MEDIA_ERR_NONE) {
		thumb_err("ms_cynara_receive_untrusted_message_thumb failed");
		close(client_sock);
		return FALSE;
	}

	if (recv_msg.msg_type != THUMB_REQUEST_KILL_SERVER) {
		if (ms_cynara_check(&credentials, MEDIA_STORAGE_PRIVILEGE) != MS_MEDIA_ERR_NONE) {
			thumb_err("Cynara denied access to process request");
			_thumb_server_send_deny_message(client_sock);
			close(client_sock);
			return TRUE;
		}
	}

	SAFE_FREE(credentials.smack);
	SAFE_FREE(credentials.uid);

	thumb_warn_slog("Received [%d] %.*s(%d) from PID(%d)", recv_msg.msg_type, MAX_FILEPATH_LEN, recv_msg.org_path, strlen(recv_msg.org_path), recv_msg.pid);

	if (recv_msg.msg_type != THUMB_REQUEST_KILL_SERVER)
		_thumb_daemon_process_job(&recv_msg, &res_msg);

	if (res_msg.msg_type == 0)
		res_msg.msg_type = recv_msg.msg_type;
	res_msg.request_id = recv_msg.request_id;
	SAFE_STRLCPY(res_msg.org_path, recv_msg.org_path, sizeof(res_msg.org_path));
	if (res_msg.msg_type != THUMB_RESPONSE_RAW_DATA)
		res_msg.thumb_size = 0;
	else
		res_msg.dst_path[0] = '\0';

	int buf_size = 0;
	int sending_block = 0;
	int block_size = sizeof(res_msg) - sizeof(unsigned char *);
	unsigned char *buf = NULL;
	_media_thumb_set_buffer(&res_msg, &buf, &buf_size);

	while (buf_size > 0) {
		if (buf_size < THUMB_BLOCK_SIZE)
			block_size = buf_size;

		if (send(client_sock, buf+sending_block, block_size, 0) != block_size) {
			thumb_stderror("sendto failed");
		}

		sending_block += block_size;
		buf_size -= block_size;
		if (block_size < THUMB_BLOCK_SIZE)
			block_size = THUMB_BLOCK_SIZE;
	}

	thumb_dbg_slog("Sent data(%d) from %s", res_msg.thumb_size, res_msg.org_path);

	SAFE_FREE(buf);
	SAFE_FREE(res_msg.thumb_data);

	if (recv_msg.msg_type == THUMB_REQUEST_KILL_SERVER) {
		thumb_warn("Shutting down...");
		g_main_loop_quit(g_thumb_server_mainloop);
	}

	close(client_sock);

	return TRUE;
}

static gboolean __thumb_server_send_msg_to_agent(int msg_type)
{
	int sock;
	struct sockaddr_un serv_addr;
	ms_thumb_server_msg send_msg;

	if (ms_ipc_create_client_socket(MS_TIMEOUT_SEC_10, &sock) < 0) {
		thumb_err("ms_ipc_create_server_socket failed");
		return FALSE;
	}

	memset(&serv_addr, 0, sizeof(serv_addr));

	serv_addr.sun_family = AF_UNIX;
	SAFE_STRLCPY(serv_addr.sun_path, THUMB_COMM_SOCK_PATH, sizeof(serv_addr.sun_path));

	/* Connecting to the thumbnail server */
	if (connect(sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0) {
		thumb_stderror("connect");
		close(sock);
		return MS_MEDIA_ERR_SOCKET_CONN;
	}

	send_msg.msg_type = msg_type;

	if (send(sock, &send_msg, sizeof(ms_thumb_server_msg), 0) != sizeof(ms_thumb_server_msg)) {
		thumb_stderror("sendto failed");
		close(sock);
		return FALSE;
	}

	thumb_dbg("Sending msg to thumbnail agent[%d] is successful", send_msg.msg_type);
	close(sock);

	return TRUE;
}

static gboolean _thumb_server_send_deny_message(int sockfd)
{
	thumbMsg msg = {0};
	int bytes_to_send = sizeof(msg);

	msg.msg_type = THUMB_RESPONSE;
	msg.status = MS_MEDIA_ERR_PERMISSION_DENIED;

	if (send(sockfd, &msg, bytes_to_send, 0) != bytes_to_send) {
		thumb_stderror("send failed");
		return FALSE;
	}

	return TRUE;
}

gboolean _thumb_server_prepare_socket(int *sock_fd)
{
	int sock;

	if (ms_ipc_create_server_socket(MS_THUMB_DAEMON_PORT, &sock) < 0) {
		thumb_err("ms_ipc_create_server_socket failed");
		return FALSE;
	}

	if (ms_cynara_enable_credentials_passing(sock) != MS_MEDIA_ERR_NONE) {
		thumb_err("ms_cynara_enable_credentials_passing failed");
		close(sock);
		return FALSE;
	}

	*sock_fd = sock;

	return TRUE;
}

int _thumbnail_get_data(const char *origin_path,
						char *thumb_path,
						unsigned char **data,
						int *width,
						int *height,
						int *alpha,
						bool *is_saved)
{
	int err = MS_MEDIA_ERR_NONE;

	if (origin_path == NULL || width == NULL || height == NULL) {
		thumb_err("Invalid parameter");
		return MS_MEDIA_ERR_INVALID_PARAMETER;
	}

	if (!g_file_test(origin_path, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR)) {
		thumb_err("Original path (%s) does not exist", origin_path);
		return MS_MEDIA_ERR_INVALID_PARAMETER;
	}

	thumb_dbg("Origin path : %s", origin_path);

	int file_type = THUMB_NONE_TYPE;
	media_thumb_info thumb_info = {0,};
	file_type = _media_thumb_get_file_type(origin_path);
	thumb_info.is_raw = FALSE;

	if (file_type == THUMB_IMAGE_TYPE) {
		err = _media_thumb_image(origin_path, thumb_path, THUMB_DEFAULT_WIDTH, THUMB_DEFAULT_HEIGHT, &thumb_info);
		thumb_retvm_if(err != MS_MEDIA_ERR_NONE, err, "_media_thumb_image failed");
	} else if (file_type == THUMB_VIDEO_TYPE) {
		err = _media_thumb_video(origin_path, THUMB_DEFAULT_WIDTH, THUMB_DEFAULT_HEIGHT, &thumb_info);
		thumb_retvm_if(err != MS_MEDIA_ERR_NONE, err, "_media_thumb_video failed");
	} else {
		thumb_err("invalid file type");
		return MS_MEDIA_ERR_THUMB_UNSUPPORTED;
	}

	if (width) *width = thumb_info.width;
	if (height) *height = thumb_info.height;
	*data = thumb_info.data;
	if (alpha) *alpha = thumb_info.alpha;
	if (is_saved) *is_saved = thumb_info.is_saved;

	thumb_dbg("Thumb data is generated successfully (Size:%d, W:%d, H:%d) %p", thumb_info.size, *width, *height, *data);

	return MS_MEDIA_ERR_NONE;
}

int _thumbnail_get_raw_data(const char *origin_path, int *width, int *height, unsigned char **data, int *size)
{
	int err = MS_MEDIA_ERR_NONE;
	int thumb_width = -1;
	int thumb_height = -1;
	const char * thumb_path = NULL;

	if (origin_path == NULL || *width <= 0 || *height <= 0) {
		thumb_err("Invalid parameter");
		return MS_MEDIA_ERR_INVALID_PARAMETER;
	}

	if (!g_file_test(origin_path, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR)) {
		thumb_err("Original path (%s) does not exist", origin_path);
		return MS_MEDIA_ERR_INVALID_PARAMETER;
	}

	int file_type = THUMB_NONE_TYPE;
	media_thumb_info thumb_info = {0,};
	file_type = _media_thumb_get_file_type(origin_path);
	thumb_width = *width;
	thumb_height = *height;
	thumb_info.is_raw = TRUE;

	if (file_type == THUMB_IMAGE_TYPE) {
		err = _media_thumb_image(origin_path, thumb_path, thumb_width, thumb_height, &thumb_info);
		thumb_retvm_if(err != MS_MEDIA_ERR_NONE, err, "_media_thumb_image failed");
	} else if (file_type == THUMB_VIDEO_TYPE) {
		err = _media_thumb_video(origin_path, thumb_width, thumb_height, &thumb_info);
		thumb_retvm_if(err != MS_MEDIA_ERR_NONE, err, "_media_thumb_video failed");
	} else {
		thumb_err("invalid file type");
		return MS_MEDIA_ERR_THUMB_UNSUPPORTED;
	}

	if (size) *size = thumb_info.size;
	*data = thumb_info.data;
	*width = thumb_info.width;
	*height = thumb_info.height;

	return MS_MEDIA_ERR_NONE;
}

int _media_thumb_process(thumbMsg *req_msg, thumbMsg *res_msg)
{
	int err = MS_MEDIA_ERR_NONE;
	unsigned char *data = NULL;
	int thumb_w = 0;
	int thumb_h = 0;
	char *thumb_path = NULL;
	int alpha = 0;
	bool is_saved = FALSE;

	thumb_retvm_if(req_msg == NULL || res_msg == NULL, MS_MEDIA_ERR_INVALID_PARAMETER, "Invalid msg");

	const char *origin_path = req_msg->org_path;
	memset(res_msg->dst_path, 0, MAX_FILEPATH_LEN);
	thumb_path = res_msg->dst_path;
	res_msg->status = MS_MEDIA_ERR_NONE;

	if (!g_file_test(origin_path, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR)) {
		thumb_err("origin_path does not exist in file system.");
		res_msg->status = MS_MEDIA_ERR_FILE_NOT_EXIST;
		return MS_MEDIA_ERR_FILE_NOT_EXIST;
	}

	err = _media_thumb_get_thumb_from_db(origin_path, thumb_path, MAX_FILEPATH_LEN, req_msg->uid);
	if (err == MS_MEDIA_ERR_NONE) {
		thumb_dbg_slog("Thumb path : %s", thumb_path);
		return MS_MEDIA_ERR_NONE;
	} else {
		if (strlen(thumb_path) == 0) {
			err = _media_thumb_get_hash_name(origin_path, thumb_path, MAX_FILEPATH_LEN, req_msg->uid);
			if (err != MS_MEDIA_ERR_NONE) {
				thumb_err("_media_thumb_get_hash_name failed - %d", err);
				SAFE_STRLCPY(thumb_path, THUMB_EMPTY_STR, MAX_FILEPATH_LEN);
				res_msg->status = err;
				return err;
			}
		}
	}

	thumb_dbg_slog("Thumb path : %s", thumb_path);

	if (g_file_test(thumb_path, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR)) {
		thumb_warn("thumb path already exists in file system.. remove the existed file");
		_media_thumb_remove_file(thumb_path);
	}

	err = _thumbnail_get_data(origin_path, thumb_path, &data, &thumb_w, &thumb_h, &alpha, &is_saved);
	if (err != MS_MEDIA_ERR_NONE) {
		thumb_err("_thumbnail_get_data failed - %d", err);
		SAFE_FREE(data);
		SAFE_STRLCPY(thumb_path, THUMB_EMPTY_STR, MAX_FILEPATH_LEN);
		res_msg->status = err;

		goto DB_UPDATE;
	}

	res_msg->msg_type = THUMB_RESPONSE;

	/* If the image is transparent PNG format, make png file as thumbnail of this image */
	if (alpha) {
		char file_ext[10];
		err = _media_thumb_get_file_ext(origin_path, file_ext, sizeof(file_ext));
		if (strncasecmp(file_ext, "png", 3) == 0) {
			int len = strlen(thumb_path);
			thumb_path[len - 3] = 'p';
			thumb_path[len - 2] = 'n';
			thumb_path[len - 1] = 'g';
		}
		thumb_dbg_slog("Thumb path is changed : %s", thumb_path);
	}

	if (is_saved == FALSE && data != NULL) {
		err = _media_thumb_save_to_file_with_evas(data, thumb_w, thumb_h, alpha, thumb_path);
		if (err != MS_MEDIA_ERR_NONE) {
			thumb_err("save_to_file_with_evas failed - %d", err);
			SAFE_FREE(data);

			SAFE_STRLCPY(thumb_path, THUMB_EMPTY_STR, MAX_FILEPATH_LEN);
			res_msg->status = err;
			return err;
		} else {
			thumb_dbg("file save success");
		}
	} else {
		thumb_dbg("file is already saved");
	}

	/* fsync */
	int fd = 0;
	fd = open(thumb_path, O_WRONLY);
	if (fd < 0) {
		thumb_warn("open failed");
	} else {
		err = fsync(fd);
		if (err == -1) {
			thumb_warn("fsync failed");
			res_msg->status = MS_MEDIA_ERR_INTERNAL;
		}

		close(fd);
	}
	/* End of fsync */

	SAFE_FREE(data);
DB_UPDATE:
	err = _media_thumb_update_db(origin_path, thumb_path, req_msg->uid);
	if (err != MS_MEDIA_ERR_NONE) {
		thumb_err("_media_thumb_update_db failed : %d", err);
		res_msg->status = err;
	}

	return err;
}

int
_media_thumb_process_raw(thumbMsg *req_msg, thumbMsg *res_msg)
{
	int err = MS_MEDIA_ERR_NONE;
	unsigned char *data = NULL;
	int thumb_size = 0;
	int thumb_w = 0;
	int thumb_h = 0;

	thumb_retvm_if(req_msg == NULL || res_msg == NULL, MS_MEDIA_ERR_INVALID_PARAMETER, "Invalid msg");

	const char *origin_path = req_msg->org_path;
	if (req_msg->thumb_width > 0)
		thumb_w = req_msg->thumb_width;
	else
		thumb_w = THUMB_DEFAULT_WIDTH;

	if (req_msg->thumb_height > 0)
		thumb_h = req_msg->thumb_height;
	else
		thumb_h = THUMB_DEFAULT_HEIGHT;

	res_msg->status = MS_MEDIA_ERR_NONE;
	res_msg->msg_type = THUMB_RESPONSE_RAW_DATA;

	err = _thumbnail_get_raw_data(origin_path, &thumb_w, &thumb_h, &data, &thumb_size);
	if (err != MS_MEDIA_ERR_NONE) {
		thumb_err("_thumbnail_get_data failed - %d", err);
		res_msg->status = err;
		res_msg->thumb_size = 0;
		SAFE_FREE(data);

		return err;
	}

	res_msg->thumb_width = thumb_w;
	res_msg->thumb_height = thumb_h;
	res_msg->thumb_size = thumb_size;
	res_msg->thumb_data = malloc(thumb_size * sizeof(unsigned char));
	if (res_msg->thumb_data != NULL) {
		memcpy(res_msg->thumb_data, data, thumb_size);
	} else {
		thumb_err("Allocation failed");
		err = MS_MEDIA_ERR_OUT_OF_MEMORY;
	}

	SAFE_FREE(data);

	return err;
}