//FUNCTIONS FOR READING SCHEDULE ON FILE.
//FILE STREAM POINTER fp OF OPEN FILE PASSED
//TO RELEVANT FUNCTIONS.
//
//Brian Smith 2022-04-10

/*Copyright (C) 2022  Brian R. Smith
 * Contact: briansmith2865@gmail.com

**The source code in this file is free software: you can
**redistribute it and/or modify it under the terms of the GNU
**General Public License (GNU GPL) as published by the Free Software
**foundation, either version 3 of the License, or (at your option)
**any later version.  The code is distributed WITHOUT ANY WARRANTY;
**without even the implied warranty of MERCHANTABILITY or FITNESS
**FOR A PARTICULAR PURPOSE.  See the GNU GPL for more details.
**
**As additional permission under GNU GPL version 3 section 7, you
**may distribute non-source (e.g., minimized or compacted) forms of
**that code without the copy of the GNU GPL normally required by
**section 4, provided you include this license notice and a URL
**through which recipients can access the Corresponding Source.
**
** @licend  The above is the entire license notice
**for the source code in this file.
*/

#ifndef SCHEDULE_H
#define SCHEDULE_H

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include"log_entry_ll.h"
#include"parse_log_entry.h"

//NOTSET, AUSK, LEKT, MEETING, CONVERSATION

enum SESSIONTYPE gettype(char buff[]){
	if(strcmp(buff, "notset") == 0)
		return  NOTSET;
	else if(strcmp(buff, "ausk") == 0)
		return AUSK;
	else if(strcmp(buff, "lekt") == 0)
		return LEKT;
	else if(strcmp(buff, "meet") == 0)
		return MEETING;
	else if(strcmp(buff, "conv") == 0)
		return CONVERSATION;
	else
		return NOTSET;
}


char getwday(char buff[]) {
	if(strcmp(buff, "sön") == 0)
		return 0;
	else if(strcmp(buff, "mån") == 0)
		return 1;
	else if(strcmp(buff, "tis") == 0)
		return 2;
	else if(strcmp(buff, "ons") == 0)
		return 3;
	else if(strcmp(buff, "tors") == 0)
		return 4;
	else if(strcmp(buff, "fre") == 0)
		return 5;
	else if(strcmp(buff, "lör") == 0)
		return 6;
	else 
		return -1;
}

LOG_ENTRY* nextEntry(FILE* fp) {
	char* buff = (char*) malloc(64);
	memset(buff, 0, 64);
	size_t bffsz = 64;
	LOG_ENTRY* entry = (LOG_ENTRY*) malloc(sizeof(LOG_ENTRY));  
	memset(entry, 0, sizeof(LOG_ENTRY));

	getline(&buff, &bffsz, fp);
	buff[strlen(buff)-1] = '\0';
	entry->date.wday = getwday(buff);
	

	getline(&buff, &bffsz, fp);
	buff[strlen(buff)-1] = '\0';
	gettime(&(entry->startTime), buff);

	getline(&buff, &bffsz, fp);
	buff[strlen(buff)-1] = '\0';
	gettime(&(entry->endTime), buff);

	getline(&buff, &bffsz, fp);
	buff[strlen(buff)-1] = '\0';
	entry->sessiontype = gettype(buff);

	getline(&buff, &bffsz, fp);
	buff[strlen(buff)-1] = '\0';
	strcpy(entry->with, buff);

	free(buff);

	return entry;
}


LOG_INDEX* getSchedule(FILE* fp) {
	if(fp == NULL)
		return NULL;

	char* empty = (char*) malloc(1); *empty = '\0';
	char* buff = (char*) malloc(4);
	char* s;
	size_t bffsz;
	int numread = 1;
	LOG_INDEX* logindex = NULL;
	LOG_INDEX* previndex = NULL;
	LOG_INDEX* index_start = NULL;
	char firstentry = 1;


	while(numread > 0) {
		numread = getline(&buff, &bffsz, fp);
		buff[strlen(buff)-1] = '\0';
		s = strip(buff);

		if(strcmp(s, "ENTRY") == 0) {
			logindex = (LOG_INDEX*) malloc(sizeof(LOG_INDEX));
			logindex->comments = empty;
			logindex->entryPtr = nextEntry(fp);
			if(firstentry) {
				index_start = logindex;
				firstentry = 0;
			}
			if(previndex != NULL)
				previndex->next = logindex;
			previndex = logindex;
		}
	}	
	logindex->next = NULL;
	
	return index_start;
}

#endif