/*
 * The contents of this file are subject to the Mozilla Public 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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Initial Developer of the Original Code is Devexperts LLC.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 */

#ifdef _WIN32
#	pragma warning(push)
#	pragma warning(disable : 5105)
#	include <Windows.h>
#	pragma warning(pop)
#else
#	include <unistd.h>
#	include <string.h>
#	include <wctype.h>
#	include <stdlib.h>
#	define stricmp strcasecmp
#endif

#include <stddef.h>
#include <stdio.h>
#include <time.h>

#include "DXErrorCodes.h"
#include "DXFeed.h"

#define true 1
#define false 0

// plus the name of the executable
#define STATIC_PARAMS_COUNT	  3
#define TIME_PARAM_SHORT_TAG  "-t"
#define TOKEN_PARAM_SHORT_TAG "-T"
#define LOG_DATA_TRANSFER_TAG "-p"
#define TIMEOUT_TAG			  "-o"

// Prevents file names globbing (converting * to all files in the current dir)
#ifdef __MINGW64_VERSION_MAJOR
int _CRT_glob = 0;
#endif

/* -------------------------------------------------------------------------- */
#ifdef _WIN32
static int is_listener_thread_terminated = false;
CRITICAL_SECTION listener_thread_guard;

int is_thread_terminate() {
	int res;
	EnterCriticalSection(&listener_thread_guard);
	res = is_listener_thread_terminated;
	LeaveCriticalSection(&listener_thread_guard);

	return res;
}
#else
static volatile int is_listener_thread_terminated = false;
int is_thread_terminate() {
	int res;
	res = is_listener_thread_terminated;
	return res;
}
#endif

/* -------------------------------------------------------------------------- */

#ifdef _WIN32
void on_reader_thread_terminate(dxf_connection_t connection, void* user_data) {
	EnterCriticalSection(&listener_thread_guard);
	is_listener_thread_terminated = true;
	LeaveCriticalSection(&listener_thread_guard);

	wprintf(L"\nTerminating listener thread\n");
}
#else
void on_reader_thread_terminate(dxf_connection_t connection, void* user_data) {
	is_listener_thread_terminated = true;
	wprintf(L"\nTerminating listener thread\n");
}
#endif

void print_timestamp(dxf_long_t timestamp) {
	wchar_t timefmt[80];

	struct tm* timeinfo;
	time_t tmpint = (time_t)(timestamp / 1000);
	timeinfo = localtime(&tmpint);
	wcsftime(timefmt, 80, L"%Y%m%d-%H%M%S", timeinfo);
	wprintf(L"%ls", timefmt);
}

/* -------------------------------------------------------------------------- */

void listener(int event_type, dxf_const_string_t symbol_name, const dxf_event_data_t* data, int data_count,
			  void* user_data) {
	dxf_int_t i = 0;
	dxf_candle_t* candles = NULL;

	wprintf(L"%ls{symbol=%ls, ", dx_event_type_to_string(event_type), symbol_name);

	if (event_type != DXF_ET_CANDLE) return;
	candles = (dxf_candle_t*)data;

	for (; i < data_count; ++i) {
		wprintf(L"time=");
		print_timestamp(candles[i].time);
		wprintf(
			L", sequence=%d, count=%.15g, open=%.15g, high=%.15g, low=%.15g, close=%.15g, volume=%.15g, "
			L"VWAP=%.15g, bidVolume=%.15g, askVolume=%.15g, impVolatility=%.15g, OpenInterest=%.15g}\n",
			candles[i].sequence, candles[i].count, candles[i].open, candles[i].high, candles[i].low, candles[i].close,
			candles[i].volume, candles[i].vwap, candles[i].bid_volume, candles[i].ask_volume, candles[i].imp_volatility,
			candles[i].open_interest);
	}
}
/* -------------------------------------------------------------------------- */

void process_last_error() {
	int error_code = dx_ec_success;
	dxf_const_string_t error_descr = NULL;
	int res;

	res = dxf_get_last_error(&error_code, &error_descr);

	if (res == DXF_SUCCESS) {
		if (error_code == dx_ec_success) {
			wprintf(L"No error information is stored");
			return;
		}

		wprintf(
			L"Error occurred and successfully retrieved:\n"
			L"error code = %d, description = \"%ls\"\n",
			error_code, error_descr);
		return;
	}

	wprintf(L"An error occurred but the error subsystem failed to initialize\n");
}

/* -------------------------------------------------------------------------- */
dxf_string_t ansi_to_unicode(const char* ansi_str) {
#ifdef _WIN32
	size_t len = strlen(ansi_str);
	dxf_string_t wide_str = NULL;

	// get required size
	int wide_size = MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED | MB_ERR_INVALID_CHARS, ansi_str, (int)len, wide_str, 0);

	if (wide_size > 0) {
		wide_str = calloc(wide_size + 1, sizeof(dxf_char_t));
		MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED | MB_ERR_INVALID_CHARS, ansi_str, (int)len, wide_str, wide_size);
	}

	return wide_str;
#else  /* _WIN32 */
	dxf_string_t wide_str = NULL;
	size_t wide_size = mbstowcs(NULL, ansi_str, 0);	 // 0 is ignored

	if (wide_size > 0 && wide_size != (size_t)-1) {
		wide_str = calloc(wide_size + 1, sizeof(dxf_char_t));
		mbstowcs(wide_str, ansi_str, wide_size + 1);
	}

	return wide_str;
#endif /* _WIN32 */
}

int atoi2(char* str, int* result) {
	if (str == NULL || str[0] == '\0' || result == NULL) {
		return false;
	}

	if (str[0] == '0' && str[1] == '\0') {
		*result = 0;

		return true;
	}

	int r = atoi(str);

	if (r == 0) {
		return false;
	}

	*result = r;

	return true;
}

#define DATE_TIME_BUF_SIZE 4
/*
 * Parse date string in format 'DD-MM-YYYY'
 */
int parse_date(const char* date_str, struct tm* time_struct) {
	size_t i;
	size_t date_string_len = strlen(date_str);
	int separator_count = 0;
	char buf[DATE_TIME_BUF_SIZE + 1] = {0};
	int mday = 0;
	int month = 0;
	int year = 0;

	for (i = 0; i < date_string_len; i++) {
		if (date_str[i] == '-') {
			if (separator_count == 0) {
				if (!atoi2(buf, &mday)) return false;
			} else if (separator_count == 1) {
				if (!atoi2(buf, &month)) return false;
			} else
				return false;
			separator_count++;
			memset(buf, 0, DATE_TIME_BUF_SIZE);
			continue;
		}

		size_t buf_len = strlen(buf);
		if (buf_len >= DATE_TIME_BUF_SIZE) return false;
		buf[buf_len] = date_str[i];
	}

	if (!atoi2(buf, &year)) return false;

	if (mday == 0 || month == 0 || year == 0) return false;

	time_struct->tm_mday = mday;
	time_struct->tm_mon = month - 1;
	time_struct->tm_year = year - 1900;

	return true;
}

int main(int argc, char* argv[]) {
	dxf_connection_t connection;
	dxf_subscription_t subscription;
	int event_type = DXF_ET_CANDLE;
	dxf_candle_attributes_t candle_attributes;
	dxf_string_t symbol = NULL;
	char* dxfeed_host = NULL;
	time_t time_value = time(NULL);
	struct tm time_struct;
	struct tm* local_time = localtime(&time_value);

	time_struct.tm_sec = 0;
	time_struct.tm_min = 0;
	time_struct.tm_hour = 0;
	time_struct.tm_mday = local_time->tm_mday;
	time_struct.tm_mon = local_time->tm_mon;
	time_struct.tm_year = local_time->tm_year;
	time_value = mktime(&time_struct);

	if (argc < STATIC_PARAMS_COUNT) {
		printf(
			"DXFeed candle console sample.\n"
			"Usage: CandleSample <server address>|<path> <symbol> [" TIME_PARAM_SHORT_TAG
			" <DD-MM-YYYY>] "
			"[" TOKEN_PARAM_SHORT_TAG " <token>] [" LOG_DATA_TRANSFER_TAG "] [" TIMEOUT_TAG
			" <timeout>]\n"
			"  <server address> - The DXFeed server address, e.g. demo.dxfeed.com:7300\n"
			"  <path>           - The path to file with candle data (tape or non zipped Candle Web Service output)\n"
			"  <symbol>         - The trade symbol, e.g. C, MSFT, YHOO, IBM\n"
			"  " TIME_PARAM_SHORT_TAG
			" <DD-MM-YYYY>  - The time which candle started\n"
			"  " TOKEN_PARAM_SHORT_TAG
			" <token>       - The authorization token\n"
			"  " LOG_DATA_TRANSFER_TAG
			"               - Enables the packets logging\n"
			"  " TIMEOUT_TAG
			" <timeout>     - Sets the program timeout in seconds (default = 604800, i.e a week)\n"
			"Examples: \n"
			"    %s demo.dxfeed.com:7300 AAPL&Q{=m}\n"
			"    %s ./candledata_file AAPL&Q{=m}\n",
			argv[0], argv[0]);

		return 0;
	}

	dxfeed_host = argv[1];

	symbol = ansi_to_unicode(argv[2]);
	if (symbol == NULL) {
		return 1;
	}

	char* token = NULL;
	int log_data_transfer_flag = false;
	int program_timeout = 604800;  // a week

	if (argc > STATIC_PARAMS_COUNT) {
		int time_is_set = false;
		int token_is_set = false;
		int program_timeout_is_set = false;

		for (int i = STATIC_PARAMS_COUNT; i < argc; i++) {
			if (time_is_set == false && strcmp(argv[i], TIME_PARAM_SHORT_TAG) == 0) {
				if (i + 1 == argc) {
					wprintf(L"Date argument error\n");
					return 2;
				}
				i += 1;
				if (!parse_date(argv[i], &time_struct)) {
					wprintf(L"Date format error\n");
					return 3;
				}
				time_value = mktime(&time_struct);
				time_is_set = true;
			} else if (token_is_set == false && strcmp(argv[i], TOKEN_PARAM_SHORT_TAG) == 0) {
				if (i + 1 == argc) {
					wprintf(L"Token argument error\n");

					return 4;
				}

				token = argv[++i];
				token_is_set = true;
			} else if (log_data_transfer_flag == false && strcmp(argv[i], LOG_DATA_TRANSFER_TAG) == 0) {
				log_data_transfer_flag = true;
			} else if (program_timeout_is_set == false && strcmp(argv[i], TIMEOUT_TAG) == 0) {
				if (i + 1 == argc) {
					wprintf(L"The program timeout argument error\n");

					return 5;
				}

				int new_program_timeout = -1;

				if (!atoi2(argv[++i], &new_program_timeout)) {
					wprintf(L"The program timeout argument parsing error\n");

					return 6;
				}

				program_timeout = new_program_timeout;
				program_timeout_is_set = true;
			}
		}
	}

	dxf_initialize_logger_v2("candle-api.log", true, true, true, log_data_transfer_flag);
	wprintf(L"Sample test started.\n");
	wprintf(L"Connecting to host %hs...\n", dxfeed_host);

#ifdef _WIN32
	InitializeCriticalSection(&listener_thread_guard);
#endif

	if (token != NULL && token[0] != '\0') {
		if (!dxf_create_connection_auth_bearer(dxfeed_host, token, on_reader_thread_terminate, NULL, NULL, NULL, NULL,
											   &connection)) {
			process_last_error();
			free(symbol);

			return 10;
		}
	} else if (!dxf_create_connection(dxfeed_host, on_reader_thread_terminate, NULL, NULL, NULL, NULL, &connection)) {
		free(symbol);
		process_last_error();

		return 11;
	}

	wprintf(L"Connected\n");

	// Note: The docs requires time as unix time in milliseconds. So convert time_value to milliseconds timestamp.
	if (!dxf_create_subscription_timed(connection, event_type, time_value * 1000, &subscription)) {
		free(symbol);
		process_last_error();
		dxf_close_connection(connection);

		return 20;
	}

	if (!dxf_attach_event_listener(subscription, listener, NULL)) {
		free(symbol);
		process_last_error();
		dxf_close_subscription(subscription);
		dxf_close_connection(connection);

		return 21;
	}

	if (!dxf_create_candle_symbol_attributes(symbol, DXF_CANDLE_EXCHANGE_CODE_ATTRIBUTE_DEFAULT,
											 DXF_CANDLE_PERIOD_VALUE_ATTRIBUTE_DEFAULT, dxf_ctpa_default,
											 dxf_cpa_default, dxf_csa_default, dxf_caa_default,
											 DXF_CANDLE_PRICE_LEVEL_ATTRIBUTE_DEFAULT, &candle_attributes)) {
		free(symbol);
		process_last_error();
		dxf_close_subscription(subscription);
		dxf_close_connection(connection);

		return 22;
	}

	if (!dxf_add_candle_symbol(subscription, candle_attributes)) {
		free(symbol);
		process_last_error();
		dxf_delete_candle_symbol_attributes(candle_attributes);
		dxf_close_subscription(subscription);
		dxf_close_connection(connection);

		return 23;
	}

	wprintf(L"Subscribed\n");
	free(symbol);

	while (!is_thread_terminate() && program_timeout--) {
#ifdef _WIN32
		Sleep(1000);
#else
		sleep(1);
#endif
	}

	wprintf(L"Disconnecting from host...\n");

	if (!dxf_delete_candle_symbol_attributes(candle_attributes)) {
		process_last_error();

		return 24;
	}

	if (!dxf_close_subscription(subscription)) {
		process_last_error();

		return 25;
	}

	if (!dxf_close_connection(connection)) {
		process_last_error();

		return 12;
	}

	wprintf(L"Disconnected\n");

#ifdef _WIN32
	DeleteCriticalSection(&listener_thread_guard);
#endif

	return 0;
}