//MAIN FUNCTION FOR PROGRAM LOGGBOK.

//MAKE, EDIT, AND DELETE LOG ENTRIES WITH FOLLOWING FIELDS:
//	DATE, START-TIME, END-TIME, WITH, SESSIONTYPE, COMMENTS.
//
//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.
*/



//The first 5 fields are stored in structure LOG_ENTRY, defined in
//log_entry_def.h. Comments are stored separately and linked to a 
//LOG_ENTRY via a structure LOG_INDEX. The LOG_INDEXes form a linked
//list in chronological order. 

//The main function is primarily a loop that awaits user input and based on user's
//request calls functions from the following files: 

#include"parse_log_entry.h"	//getNewEntry()		type LOG_INDEX, macro NUM_ELEMS
#include"log_entry_ll.h"	//printLogList()
#include"get_new_entry.h"	//getNewEntry(), 	EMPTY_STRING
#include"log_entry_files.h"	//read_log(), write_log() 
#include"write_toHTML.h"	//toHTML()
#include"edit_entry.h"		//dateStart() 
#include"tot_time.h"		//totalminutes() minToHrs() <-- automatic: part of print request.
#include"schedule.h"		//getSchedule() 


//USER COMMANDS:
//print (Print entire list of entries to screen). 
//clear, save, exit, exit!! (Last means exit and don't save.)
//new, edit (Edit gives also option to delete.)
//sch (See schedule on file). 



int main () {
	FILE* sch_p = fopen("myschedule.txt", "r");
	LOG_INDEX* schedule_start = NULL;
	schedule_start = getSchedule(sch_p); //Get schedule on file.
	if(sch_p != NULL)
		fclose(sch_p);	

	printf("Schedule:\n");
	printLogList(schedule_start);

	LOG_INDEX* index_start = NULL;   //Pointer to head of list.   
        NUM_ELEMS = read_log(&index_start);   	//Read log entries and comments, create linked list.
       							//index_start points now to the head of list.
							//NUM_ELEMS is no. elements in list.
							

	char buff[50];			//For receiving user command.
	//char comments_buff[2048];	//Comments temporarily saved here.
	char* empty = "";		//An empty string. If no comments log entries comments pointer
					//....points to this string.


	//MAIN LOOP ** MAIN LOOP ** MAIN LOOP ** MAIN LOOP.
	while(1) {
		printf(">> ");
		getmaline(buff); strip(buff);	//Get user command in buff.
		if(strcmp(buff,"exit") == 0) {	//Exit and save data.
			if(NUM_ELEMS == 0) {
				printf("\033[0;32mEXITING. ENTRY LIST IS EMPTY.\033[0m\n");
				break;
			}
			write_log(index_start, NUM_ELEMS);	//Write log entries and comments to files.
			break;
		}
		else if(strcmp(buff, "sch") == 0)
			printLogList(schedule_start);
		else if(strcmp(buff, "save") == 0) {
			if(NUM_ELEMS == 0) 
				printf("\033[0;32mEXITING. ENTRY LIST IS EMPTY.\033[0m\n");
			else
				write_log(index_start, NUM_ELEMS);	//Write as above.
		}
		else if(strcmp(buff, "exit!!") == 0) {	//Exit. Do not save.
			printf("\033[0;31mLOG ENTRIES NOT SAVED\033[0m\n");
			break;
		}
		else if(strcmp(buff,"print") == 0) {	//Print log entries with comments to screen.
		        printf("\n\033[0;35mLOG ENTRIES ** LOG ENTIRES ** LOG ENTRIES \033[0m\n\n");	
			printLogList(index_start);
			int ausk_minutes = totalminutes(index_start, AUSK);
			struct mytime2 ausk_hrs = minToHrs(ausk_minutes);
			int lekt_minutes = totalminutes(index_start, LEKT);
			struct mytime2 lekt_hrs = minToHrs(lekt_minutes);
			printf("\033[0;93mAuskultation total: \033[1;92m%d min. -- %d hrs, %d min.\n", 
					ausk_minutes, ausk_hrs.hours, ausk_hrs.minutes);
			printf("\033[0;93mLektion total: \033[1;92m%d min. -- %d hrs, %d min.\n\n", 
					lekt_minutes, lekt_hrs.hours, lekt_hrs.minutes);
		        printf("\033[0;35mEND: LOG ENTRIES ************************* \033[0m\n\n");	
		}
		else if(strcmp(buff,"html") == 0)	//Write log entries as html table.
		       	toHTML(index_start);
		else if (strcmp(buff, "edit") == 0)	//Edit existing log entry.
			dateStart(&index_start);
		else if (strcmp(buff,"new") == 0) {	//Make a new log entry.
			system("clear");
			printf("\033[0;35mMAKE NEW ENTRY ** MAKE NEW ENTRY ** MAKE NEW ENTRY\033[0m\n\n");
			getNewEntry(&index_start, &NUM_ELEMS, schedule_start);
			//NOTE: HAVE TO PASS POINTER TO INDEX START IN CASE LIST IS EMPTY:
			//then index_start needs to be modified. Unfortunately this leaves index
			//start vulnerable to change.	
		}
		else if (strcmp(buff, "clear") == 0)
			system("clear");
		else printf("\033[0;31mINVALID COMMAND.\033[0m\n");
	}
		
	return 0;
}