/*
 * Copyright (c) 2007-2014, Anthony Minessale II
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of the original author; nor the names of any contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The Initial Developer of the Original Code is
 * Anthony Minessale II <anthm@freeswitch.org>
 * Portions created by the Initial Developer are Copyright (C)
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Anthony Minessale II <anthm@freeswitch.org>
 * Michael B. Murdock <mike@mmurdock.org>
 * Daniel Swarbrick <daniel.swarbrick@gmail.com>
 * Christian Benke <cb@poab.org>
 * Jakob Sundberg <jakob@mress.se> (2013)
 *
 * mod_say_sv.c -- Say for Swedish
 *
 */

#include <switch.h>
#include <math.h>
#include <ctype.h>

SWITCH_MODULE_LOAD_FUNCTION(mod_say_sv_load);
SWITCH_MODULE_DEFINITION(mod_say_sv, mod_say_sv_load, NULL, NULL);

#define say_num(_sh, num, meth) {									\
		char tmp[80];									\
		switch_status_t tstatus;							\
		switch_say_method_t smeth = say_args->method;					\
		switch_say_type_t stype = say_args->type;					\
		say_args->type = SST_ITEMS; say_args->method = meth;				\
		switch_snprintf(tmp, sizeof(tmp), "%u", (unsigned)num);				\
		if ((tstatus =									\
			sv_say_general_count(_sh, tmp, say_args))				\
			!= SWITCH_STATUS_SUCCESS) {						\
			return tstatus;								\
		}										\
		say_args->method = smeth; say_args->type = stype;				\
	}																	\

#define say_num_goto_status(_sh, num, meth, tag) {						\
		char tmp[80];													\
		switch_status_t tstatus;										\
		switch_say_args_t tsay_args = *say_args;						\
		tsay_args.type = SST_ITEMS;										\
		tsay_args.method = meth;										\
		switch_snprintf(tmp, sizeof(tmp), "%u", (unsigned)num);			\
		if ((tstatus = sv_say_general_count(_sh, tmp, &tsay_args)) !=	\
			SWITCH_STATUS_SUCCESS) {									\
			switch_goto_status(tstatus, tag);							\
		}																\
	}


static switch_status_t play_group(switch_say_method_t method, switch_say_gender_t gender, int a, int b, int c, char *what, switch_say_file_handle_t *sh)
{
	/*swedish makes the distiction between utrum for "one" (en) and neutrum for "one" (ett), e.g. voicemail-message is neutrum but recording is utrum.
	This only applies to the likes of 1, 101, 1001 etc.
	files referenced below:
		SSM_COUNTED=r-%d
		SSM_UTRUM=u-1
		SSM_NEUTRUM=n-1
	*/
	if (a) {
		if (method == SSM_COUNTED) {
			if ( a > 1 && b == 0 && c == 0) {	/* [2-9]xx */
				switch_say_file(sh, "digits/%d", a);
			}
			switch_say_file(sh, "digits/r-100");
		} else {
			if (a == 1) {	/* 1xx */
				switch_say_file(sh, "digits/n-1");
			} else {	/* [2-9]xx */
				switch_say_file(sh, "digits/%d", a);
			}
			switch_say_file(sh, "digits/hundra");
		}
	}

        if (b) {
                if (b > 1) {	/* 20 < 99 */
                        if (c == 0) {
				if (method == SSM_COUNTED) {
					switch_say_file(sh, "digits/r-%d0", b);
                        	} else {
					switch_say_file(sh, "digits/%d0", b);
				}
			} else {
                                if (c == 1) {
					if (method == SSM_COUNTED) {
						switch_say_file(sh, "digits/r-1", b);
                	        	} else {
						if (gender == SSG_UTRUM) {
        	        	        		switch_say_file(sh, "digits/u-1");
						} else {
							switch_say_file(sh, "digits/n-1");
						}
					}
                                } else {
					if (method == SSM_COUNTED) {
						switch_say_file(sh, "digits/r-%d0", b);
                	        	} else {
						switch_say_file(sh, "digits/%d0", b);
					}
				}
                        }
                } else {	/* 10 < 20 */
                        if (method == SSM_COUNTED) {
                                switch_say_file(sh, "digits/r-%d%d", b, c);
                        } else {
                                switch_say_file(sh, "digits/%d%d", b, c);
                        }
                }
                c = 0;
        }

        if (c) {	/* 0 < 9 */
		if (c == 1) {
			if (what) {
	 			switch_say_file(sh, "digits/n-1");
			} else {
				if (method == SSM_COUNTED) {
					switch_say_file(sh, "digits/r-1");
				} else {
					if (gender == SSG_UTRUM) {
						switch_say_file(sh, "digits/u-1");
					} else {
						switch_say_file(sh, "digits/n-1");
					}
				}
			}
		} else {
			if (what) {
				switch_say_file(sh, "digits/%d", c);
			} else {
				if (method == SSM_COUNTED) {
					switch_say_file(sh, "digits/r-%d", c);
				} else {
					switch_say_file(sh, "digits/%d", c);
				}
			}
		}
	}

        if (what && (a || b || c)) {
                switch_say_file(sh, what);
        }

	return SWITCH_STATUS_SUCCESS;
}

static switch_status_t sv_say_general_count(switch_say_file_handle_t *sh, char *tosay, switch_say_args_t *say_args)
{
	int in;
	int x = 0;
	int places[9] = { 0 };
	char sbuf[128] = "";
	switch_status_t status;

	if (say_args->method == SSM_ITERATED) {
		if ((tosay = switch_strip_commas(tosay, sbuf, sizeof(sbuf)-1))) {
			char *p;
			for (p = tosay; p && *p; p++) {
				switch_say_file(sh, "digits/%c", *p);
			}
		} else {
			switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Parse Error!\n");
			return SWITCH_STATUS_GENERR;
		}
		return SWITCH_STATUS_SUCCESS;
	}

	if (!(tosay = switch_strip_commas(tosay, sbuf, sizeof(sbuf)-1)) || strlen(tosay) > 9) {
		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Parse Error!\n");
		return SWITCH_STATUS_GENERR;
	}

	in = atoi(tosay);

	if (in != 0) {   /*fills the places-array with tosay(resp. in) from tail to front e.g. 84371 would be places[|1|7|3|4|8|0|0|0|], up to 1 billion minus 1*/
		for (x = 8; x >= 0; x--) {
			int num = (int) pow(10, x);
			if ((places[(uint32_t) x] = in / num)) {
				in -= places[(uint32_t) x] * num;
			}
		}

		switch (say_args->method) {
                case SSM_PRONOUNCED_YEAR:
                        {
                                int num = atoi(tosay);
                                int a = num / 100;
                                int b = num % 100;

                                if (!b || !(a % 10)) {
                                        say_num(sh, num, SSM_PRONOUNCED);
                                        return SWITCH_STATUS_SUCCESS;
                                }

                                say_num(sh, a, SSM_PRONOUNCED);
                                say_num(sh, b, SSM_PRONOUNCED);

                                return SWITCH_STATUS_SUCCESS;
                        }
                        break;
		case SSM_COUNTED:
		case SSM_PRONOUNCED:
			if (places[6] == 1 && ( !places[8] || !places[7])) {
				if ((status = play_group(SSM_PRONOUNCED, say_args->gender, places[8], places[7], places[6], "digits/miljon", sh)) != SWITCH_STATUS_SUCCESS) {
					return status;
				}
			} else {
				if ((status = play_group(SSM_PRONOUNCED, say_args->gender, places[8], places[7], places[6], "digits/miljoner", sh)) != SWITCH_STATUS_SUCCESS) {
					return status;
				}
			}
			if ((status = play_group(SSM_PRONOUNCED, say_args->gender, places[5], places[4], places[3], "digits/tusen", sh)) != SWITCH_STATUS_SUCCESS) {
				return status;
			}
			if ((status = play_group(say_args->method, say_args->gender, places[2], places[1], places[0], NULL, sh)) != SWITCH_STATUS_SUCCESS) {
				return status;
			}
			break;
		default:
			break;
		}
	} else {
		switch_say_file(sh, "digits/0");
	}

	return SWITCH_STATUS_SUCCESS;
}

static switch_status_t sv_say_time(switch_say_file_handle_t *sh, char *tosay, switch_say_args_t *say_args)
{
	int32_t t;
	switch_time_t target = 0, target_now = 0;
	switch_time_exp_t tm, tm_now;
	uint8_t say_date = 0, say_time = 0, say_year = 0, say_month = 0, say_dow = 0, say_day = 0, say_yesterday = 0, say_today = 0;
	const char *tz = NULL;

	tz = switch_say_file_handle_get_variable(sh, "timezone");

	if (say_args->type == SST_TIME_MEASUREMENT) {
		int64_t hours = 0;
		int64_t minutes = 0;
		int64_t seconds = 0;
		int64_t r = 0;

		if (strchr(tosay, ':')) {
			char *tme = strdup(tosay);
			char *p;

			if ((p = strrchr(tme, ':'))) {
				*p++ = '\0';
				seconds = atoi(p);
				if ((p = strchr(tme, ':'))) {
					*p++ = '\0';
					minutes = atoi(p);
					hours = atoi(tme);
				} else {
					minutes = atoi(tme);
				}
			}
			free(tme);
		} else {
			if ((seconds = atol(tosay)) <= 0) {
				seconds = (int64_t) switch_epoch_time_now(NULL);
			}

			if (seconds >= 60) {
				minutes = seconds / 60;
				r = seconds % 60;
				seconds = r;
			}

			if (minutes >= 60) {
				hours = minutes / 60;
				r = minutes % 60;
				minutes = r;
			}
		}

		if (hours) {
			say_num(sh, hours, SSM_PRONOUNCED);
			if (hours == 1) {
				switch_say_file(sh, "time/timme");
			} else {
				switch_say_file(sh, "time/timmar");
			}
		} else { /* midnight */
			if (minutes == 0) {
				switch_say_file(sh, "time/midnatt");
			} else {
				switch_say_file(sh, "digits/0");
				switch_say_file(sh, "time/timmar");
			}
		}

		if (minutes) {
			say_num(sh, minutes, SSM_PRONOUNCED);
			if (minutes == 1) {
				switch_say_file(sh, "time/minut");
			} else {
				switch_say_file(sh, "time/minuter");
			}
		} else {
			switch_say_file(sh, "digits/0");
			switch_say_file(sh, "time/minuter");
		}

		if (seconds) {
			say_num(sh, seconds, SSM_PRONOUNCED);
			if (seconds == 1) {
				switch_say_file(sh, "time/sekund");
			} else {
				switch_say_file(sh, "time/sekunder");
			}
		} else {
			switch_say_file(sh, "digits/0");
			switch_say_file(sh, "time/sekunder");
		}

		return SWITCH_STATUS_SUCCESS;
	}

	if ((t = atol(tosay)) > 0) {
		target = switch_time_make(t, 0);
		target_now = switch_micro_time_now();
	} else {
		target = switch_micro_time_now();
		target_now = switch_micro_time_now();
	}

        if (tz) {
                int check = atoi(tz);
                switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Timezone is [%s]\n", tz);
                if (check) {
                        switch_time_exp_tz(&tm, target, check);
                        switch_time_exp_tz(&tm_now, target_now, check);
                } else {
                        switch_time_exp_tz_name(tz, &tm, target);
                        switch_time_exp_tz_name(tz, &tm_now, target_now);
                }
        } else {
                switch_time_exp_lt(&tm, target);
                switch_time_exp_lt(&tm_now, target_now);
        }

	switch (say_args->type) {
	case SST_CURRENT_DATE_TIME:
		say_date = say_time = 1;
		break;
	case SST_CURRENT_DATE:
		say_date = 1;
		break;
	case SST_CURRENT_TIME:
		say_time = 1;
		break;
        case SST_SHORT_DATE_TIME:
                say_time = 1;
                if (tm.tm_year != tm_now.tm_year) {
                        say_date = 1;
                        break;
                }
                if (tm.tm_yday == tm_now.tm_yday) {
                        say_today = 1;
                        break;
                }
                if (tm.tm_yday == tm_now.tm_yday - 1) {
                        say_yesterday = 1;
                        break;
                }
                if (tm.tm_yday >= tm_now.tm_yday - 5) {
                        say_dow = 1;
                        break;
                }
                if (tm.tm_mon != tm_now.tm_mon) {
                        say_month = say_day = say_dow = 1;
                        break;
                }

                say_month = say_day = say_dow = 1;

                break;
	default:
		break;
	}

        if (say_today) {
                switch_say_file(sh, "time/idag");
        }
        if (say_yesterday) {
                switch_say_file(sh, "time/igar");
        }
        if (say_dow) {
                switch_say_file(sh, "time/day-%d", tm.tm_wday);
        }

        if (say_date) {
                say_year = say_month = say_day = 1;
        }

        if (say_month) {
                switch_say_file(sh, "time/mon-%d", tm.tm_mon);
        }
        if (say_day) {
                say_num(sh, tm.tm_mday, SSM_COUNTED);
        }
        if (say_year) {
                say_num(sh, tm.tm_year + 1900, SSM_PRONOUNCED_YEAR);
        }

	if (say_time) {		/* sweden use only 24h time format */
		if (tm.tm_hour > 9) {
			say_num(sh, tm.tm_hour, SSM_PRONOUNCED);
		} else if (tm.tm_hour) {
			switch_say_file(sh, "digits/0");
			say_num(sh, tm.tm_hour, SSM_PRONOUNCED);
		}
		if (tm.tm_min > 9) {
			say_num(sh, tm.tm_min, SSM_PRONOUNCED);
		} else if (tm.tm_min) {
			switch_say_file(sh, "digits/0");
			say_num(sh, tm.tm_min, SSM_PRONOUNCED);
		}
	}

	return SWITCH_STATUS_SUCCESS;
}


static switch_status_t sv_say_money(switch_say_file_handle_t *sh, char *tosay, switch_say_args_t *say_args)
{
	char sbuf[16] = "";			/* enough for 999,999,999,999.99 (w/o the commas or leading $) */
	char *dollars = NULL;
	char *cents = NULL;

	if (strlen(tosay) > 15 || !switch_strip_nonnumerics(tosay, sbuf, sizeof(sbuf)-1)) {
		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Parse Error!\n");
		return SWITCH_STATUS_GENERR;
	}

	dollars = sbuf;

	if ((cents = strchr(sbuf, '.'))) {
		*cents++ = '\0';
		if (strlen(cents) > 2) {
			cents[2] = '\0';
		}
	}

	/* If positive sign - skip over" */
	if (sbuf[0] == '+') {
		dollars++;
	}

	/* If negative say "negative" */
	if (sbuf[0] == '-') {
		switch_say_file(sh, "currency/negativ");
		dollars++;
	}

	/* Say dollar amount */
	sv_say_general_count(sh, dollars, say_args);
	if (atoi(dollars) == 1) {
		switch_say_file(sh, "currency/krona");
	} else {
		switch_say_file(sh, "currency/kronor");
	}

	/* Say "and" */
	switch_say_file(sh, "currency/och");

	/* Say cents */
	if (cents) {
		sv_say_general_count(sh, cents, say_args);
		if (atoi(cents) == 1) {
			switch_say_file(sh, "currency/ore");
		} else {
			switch_say_file(sh, "currency/oren");
		}
	} else {
		switch_say_file(sh, "digits/0");
		switch_say_file(sh, "currency/ore");
	}

	return SWITCH_STATUS_SUCCESS;
}

static switch_status_t say_ip(switch_say_file_handle_t *sh, char *tosay, switch_say_args_t *say_args)
{
        char *a, *b, *c, *d;
        switch_status_t status = SWITCH_STATUS_FALSE;

        if (!(a = strdup(tosay))) {
                abort();
        }

        if (!(b = strchr(a, '.'))) {
                goto end;
        }

        *b++ = '\0';

        if (!(c = strchr(b, '.'))) {
                goto end;
        }

        *c++ = '\0';

        if (!(d = strchr(c, '.'))) {
                goto end;
        }

        *d++ = '\0';

        say_num_goto_status(sh, atoi(a), say_args->method, end);
        switch_say_file(sh, "digits/punkt");
        say_num_goto_status(sh, atoi(b), say_args->method, end);
        switch_say_file(sh, "digits/punkt");
        say_num_goto_status(sh, atoi(c), say_args->method, end);
        switch_say_file(sh, "digits/punkt");
        say_num_goto_status(sh, atoi(d), say_args->method, end);

 end:

        free(a);

        return status;
}

static switch_status_t say_spell(switch_say_file_handle_t *sh, char *tosay, switch_say_args_t *say_args)
{
        char *p;

        for (p = tosay; p && *p; p++) {
                int a = tolower((int) *p);
                if (a >= '0' && a <= '9') {
                        switch_say_file(sh, "digits/%c", a);
                } else {
                        if (say_args->type == SST_NAME_SPELLED) {
                                switch_say_file(sh, "ascii/%d", a);
                        } else if (say_args->type == SST_NAME_PHONETIC) {
                                switch_say_file(sh, "phonetic-ascii/%d", a);
                        }
                }
        }

        return SWITCH_STATUS_SUCCESS;
}

static switch_new_say_callback_t choose_callback(switch_say_args_t *say_args)
{
        switch_new_say_callback_t say_cb = NULL;

        switch (say_args->type) {
        case SST_NUMBER:
        case SST_ITEMS:
        case SST_PERSONS:
        case SST_MESSAGES:
                say_cb = sv_say_general_count;
                break;
        case SST_TIME_MEASUREMENT:
        case SST_CURRENT_DATE:
        case SST_CURRENT_TIME:
        case SST_CURRENT_DATE_TIME:
        case SST_SHORT_DATE_TIME:
                say_cb = sv_say_time;
                break;
        case SST_IP_ADDRESS:
                say_cb = say_ip;
                break;
        case SST_NAME_SPELLED:
        case SST_NAME_PHONETIC:
                say_cb = say_spell;
                break;
        case SST_CURRENCY:
                say_cb = sv_say_money;
                break;
        default:
                switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Unknown Say type=[%d]\n", say_args->type);
                break;
        }

        return say_cb;
}

static switch_status_t run_callback(switch_new_say_callback_t say_cb, char *tosay, switch_say_args_t *say_args, switch_core_session_t *session, char **rstr)
{
        switch_say_file_handle_t *sh;
        switch_status_t status = SWITCH_STATUS_FALSE;
        switch_event_t *var_event = NULL;

        if (session) {
                switch_channel_t *channel = switch_core_session_get_channel(session);
                switch_channel_get_variables(channel, &var_event);
        }

        switch_say_file_handle_create(&sh, say_args->ext, &var_event);

        status = say_cb(sh, tosay, say_args);

        if ((*rstr = switch_say_file_handle_detach_path(sh))) {
                status = SWITCH_STATUS_SUCCESS;
        }

        switch_say_file_handle_destroy(&sh);

        return status;
}

static switch_status_t sv_say(switch_core_session_t *session, char *tosay, switch_say_args_t *say_args, switch_input_args_t *args)
{

        switch_new_say_callback_t say_cb = NULL;
        char *string = NULL;

        switch_status_t status = SWITCH_STATUS_FALSE;

        say_cb = choose_callback(say_args);

        if (say_cb) {
                status = run_callback(say_cb, tosay, say_args, session, &string);
                if (session && string) {
                        status = switch_ivr_play_file(session, NULL, string, args);
                }

                switch_safe_free(string);
        }

        return status;
}

static switch_status_t sv_say_string(switch_core_session_t *session, char *tosay, switch_say_args_t *say_args, char **rstr)
{

        switch_new_say_callback_t say_cb = NULL;
        char *string = NULL;

        switch_status_t status = SWITCH_STATUS_FALSE;

        say_cb = choose_callback(say_args);

        if (say_cb) {
                status = run_callback(say_cb, tosay, say_args, session, &string);
                if (string) {
                        status = SWITCH_STATUS_SUCCESS;
                        *rstr = string;
                }
        }

        return status;
}

SWITCH_MODULE_LOAD_FUNCTION(mod_say_sv_load)
{
	switch_say_interface_t *say_interface;
	/* connect my internal structure to the blank pointer passed to me */
	*module_interface = switch_loadable_module_create_module_interface(pool, modname);
	say_interface = switch_loadable_module_create_interface(*module_interface, SWITCH_SAY_INTERFACE);
	say_interface->interface_name = "sv";
	say_interface->say_function = sv_say;
	say_interface->say_string_function = sv_say_string;

	/* indicate that the module should continue to be loaded */
	return SWITCH_STATUS_SUCCESS;
}

/* For Emacs:
 * Local Variables:
 * mode:c
 * indent-tabs-mode:t
 * tab-width:4
 * c-basic-offset:4
 * End:
 * For VIM:
 * vim:set softtabstop=4 shiftwidth=4 tabstop=4:
 */
