# include <stdio.h>
# include "functions.h"
# include <string.h>

void main()
{
	int eof,ctr=0,index;
	int totalkm=0,CarNo=0;
	int carkm[10];
	int nextRecord;
	char PrevRegistration[10][30]; //Assuming a max of 10 cars
	int EmployeeKilos[20][100]; // Assuming a max of 20 employees, and each will only do a max of 15 trips a month.
	int maxtrips = 100; //      // If necessary change the maxtrips and the 15 in the line above.
	float average;
	FILE * logbookfile;
	logbookfile = fopen("logbook.txt","r");
	FILE * employeefile;
	employeefile = fopen("Employee.txt","rb+");
	FILE * report;
	report = fopen("report.txt","w");
	FILE * table;
	table = fopen("table.txt","w");

	struct Employee employee;
	struct Employee employeenames[20];
	struct Log log;

	// Read employees into array for finding the names (part1), and mainly for part 3
	eof = fread(&employeenames[ctr], sizeof(employeenames[ctr]), 1, employeefile);
	nextRecord = employeenames[ctr].Record -1;

	while(eof != 0)
	{
		fseek(employeefile,nextRecord * sizeof(employeenames[ctr]),SEEK_SET);
		eof = fread(&employeenames[ctr], sizeof(employeenames[ctr]), 1, employeefile);
		eof = fread(&nextRecord, sizeof(int), 1, employeefile);
		nextRecord = nextRecord - 1;
		ctr++;
	}

	for(int x=0;x<ctr-1;x++)
	{
		for(int y=0;y<maxtrips;y++)
		{
			EmployeeKilos[x][y] = -9999; // Set all the kilos to -9999 to signify emptiness.
		}
	}

	// Part 1
	fscanf(logbookfile,"%[^,],%d,%d/%d/%d,%d%*c",log.RegistrationNumber,&log.Record,&log.Day,&log.Month,&log.Year,&log.Kilometers);

	fprintf(report,"Wiz Bang Manufacturing - Monthly Car Usage Report\n");

	while(!feof(logbookfile))
	{
		strcpy(PrevRegistration[CarNo],log.RegistrationNumber);
		carkm[CarNo] = 0;

		fprintf(report,"\n    Car Registration %s\n\n",log.RegistrationNumber);

		fprintf(report, "    Emp Num   Employee Name        Date          Kms\n");
		while(strcmp(PrevRegistration[CarNo],log.RegistrationNumber) == 0 && !feof(logbookfile))
		{
			carkm[CarNo]+=log.Kilometers;

			index = 0;
			while (index < 20 && employeenames[index].EmployeeNumber != log.Record) // Searching for the right employee for the name
			{
				index++;
			}

			fprintf(report,"%8d\t\t%8s\t\t %d/%d/%d\t%8d\n",log.Record,employeenames[index].EmployeeName,log.Day,log.Month,log.Year,log.Kilometers);

			//Part 3 - If the employeenumber from logbook matches the emp number from the array, find the first non 9999 value (in kilos array)
			for(int x=0;x<ctr-1;x++)                                                              // and set it to the log kilometers
			{
				if(employeenames[x].EmployeeNumber == log.Record)
				{
					for(int y=0;y<maxtrips;y++)
					{
						if(EmployeeKilos[x][y] == -9999)
						{
							EmployeeKilos[x][y] = log.Kilometers;
							break;
						}
					}
				}
			}

			fscanf(logbookfile,"%[^,],%d,%d/%d/%d,%d%*c",log.RegistrationNumber,&log.Record,&log.Day,&log.Month,&log.Year,&log.Kilometers);
		}
		fprintf(report,"\n\tTotal Kms for Registration %-5s was %d\n",PrevRegistration[CarNo],carkm[CarNo]);
		fprintf(report,"--------------------------------------------------\n");
		totalkm+=carkm[CarNo];
		CarNo++;
	}
	average = totalkm / CarNo;

	fprintf(report,"\n\n Number of Kms Travelled this Month was %d",totalkm);
	fprintf(report,"\n Average Kms per car was %.2f",average);


	printf("   Screen Report - Total Kms per Car\n\n"); // start producing  screen report

	for(int x=0;x<CarNo;x++)
	{
		printf("%10s Total Kms for Month was %d\n",PrevRegistration[x],carkm[x]);
	}                                                   // finish producing  screen report


	fprintf(table,"\t Kms Travelled by each Employee\n"); // Start producing Table.txt
	fprintf(table,"\t  (First four trips only)\n");
	fprintf(table,"\nName \t\t\t\t\t Trip 1   Trip 2   Trip 3   Trip 4 \n\n");

	for(int x=0;x<ctr-1;x++)
	{
		fprintf(table,"\n\n%-8s\t      ",employeenames[x].EmployeeName);
		for(int y=0;y<4;y++) // y <4 ensures that a total of 4 trips are printed
		{
			if(EmployeeKilos[x][y] != -9999)
			{
				fprintf(table,"%10d",EmployeeKilos[x][y]);
			}
		}
	}                                                      // finish producing Table.txt
	scanf("%*c");
	fclose(logbookfile);
	fclose(employeefile);
	fclose(report);
	fclose(table);
}