#include<stdio.h>
#include <stdlib.h> 
#include <conio.h> 
#include<string.h>

struct ufd{//文件主目錄塊
	char filename[10];
	char password[10];
	char filelength[10];
	struct ufd  *next;
}*file,*p,*pr;

struct mdf{//用戶目錄塊
	char username[10];
	struct ufd  *link;
}user[10]={{"one",NULL},{"two",NULL},{"three",NULL},{"four",NULL},
{"five",NULL},{"six",NULL},{"seven",NULL},{"eight",NULL},
{"nine",NULL},{"ten",NULL}};

struct afd{//打開目錄塊
	char openname[10];
	char openpassword[10];
	struct afd  *next;
}*open,*openpr;

char *cmd;

void initfile(){
	int i;
	p=(ufd*)malloc(sizeof(ufd));//user1
	strcpy(p->filename,"user1"); 
	strcpy(p->password,"123");  
	strcpy(p->filelength,"20"); 
	p->next=NULL;
	pr=p;
	file=pr;
	//user2
	p=(ufd*)malloc(sizeof(ufd));
	strcpy(p->filename,"user2"); 
	strcpy(p->password,"123");  
	strcpy(p->filelength,"20"); 
	p->next=NULL;
	pr->next=p;
	pr=pr->next;
	//user3
	p=(ufd*)malloc(sizeof(ufd));
	strcpy(p->filename,"user3"); 
	strcpy(p->password,"123");  
	strcpy(p->filelength,"20"); 
	p->next=NULL;
	pr->next=p;
}

void createfile(){
	ufd *q;
	int n=1;
	for(pr=file;pr->next!=NULL;pr=pr->next) n++;
	if(n!=10){
		p=(ufd*)malloc(sizeof(ufd));
		printf("\n請輸入要創(chuàng)建的文件名：");
		scanf("%s",p->filename);
		q=file;
		while(q!=NULL){
			for(q=file;q!=NULL;q=q->next){
				if(strcmp(q->filename,p->filename)) continue;
				if(!strcmp(q->filename,p->filename)){
					printf("\n已存在該文件名，請重新輸入要創(chuàng)建的文件名：");
					scanf("%s",p->filename);
					q=file;
					continue;
				}
			}
		}
		printf("\n請輸入要創(chuàng)建的文件保護碼：");
		scanf("%s",p->password);
		strcpy(p->filelength,"20"); 
		p->next=NULL;
		pr->next=p;
		printf("\n文件創(chuàng)建成功！\n");
	}
	else{
		printf("\n文件個數(shù)超出10個！不允許再創(chuàng)建！\n");
	}
}

void deletefile(){
	ufd *q;
	q=(ufd*)malloc(sizeof(ufd));
	int n=0;
	if(file!=NULL){
		printf("\n請輸入要刪除的文件名：");
		scanf("%s",q->filename);
		if(!strcmp(q->filename,file->filename)){
			file=file->next;
			n=1;
		}
		else{
			for(pr=file;pr->next!=NULL;){
				if(!strcmp(q->filename,pr->next->filename)){
					pr->next=pr->next->next;
					n=1;
					continue;
				}
				pr=pr->next;
			}
		}
		if(n==1) printf("\n刪除成功\n");
		if(n==0) printf("\n不存在該文件名\n");
	}
	else printf("\n當前用戶的文件已全部被刪除！\n");
}


void outputopen(){//輸出打開文件目錄
	printf("\n已打開文件目錄如下：\n");
	printf("\n 文件名        保護碼\n");
	for(openpr=open;openpr!=NULL;openpr=openpr->next){
		printf("\n  %-11s ",openpr->openname);
		printf("  %-11s \n",openpr->openpassword);
	}
}

void openfile(){//打開文件程序
	afd *q;
	int i=0;
	q=(afd*)malloc(sizeof(afd));
	q->next=NULL;
	printf("\n請輸入要打開的文件名：");
	scanf("%s",q->openname);
	for(pr=file;pr!=NULL;pr=pr->next){
		if(!strcmp(q->openname,pr->filename)){
			i=1;
			break;
		}
	}
	if(open!=NULL){
		for(openpr=open;openpr!=NULL;openpr=openpr->next){
			if(!strcmp(q->openname,openpr->openname)) i=2;
		}
	}
	if(i==1){
		printf("\n請輸入要打開文件的保護碼：");
		scanf("%s",q->openpassword);
		if(!strcmp(q->openpassword,pr->password)){
			printf("\n已成功打開文件！\n");
			if(open==NULL)	open=q;
			else{
				for(openpr=open;openpr->next!=NULL;openpr=openpr->next);
				openpr->next=q;
			}
			outputopen();
		}
		else{
			printf("\n保護碼輸入錯誤！\n");
		}
	}
	else if(i==2) printf("\n該文件已經(jīng)打開！\n");
	else 	      printf("\n沒有你要打開的文件或已被刪除！\n");
}

void closefile(){
	afd *q;
	int count=0;
	q=(afd*)malloc(sizeof(afd));
	if(open==NULL) printf("\n沒有打開的文件！\n");
	else{
		printf("\n請輸入要關閉的文件名：");
		scanf("%s",q->openname);
		if(!strcmp(q->openname,open->openname)){
			open=open->next;
			count=1;
			printf("\n該文件已經(jīng)成功關閉！\n");
		}
		else{
			for(openpr=open;openpr->next!=NULL;){
				if(!strcmp(q->openname,openpr->next->openname)){
					openpr->next=openpr->next->next;
					count=1;
					printf("\n該文件已經(jīng)成功關閉！\n");
				}
				else openpr=openpr->next;
			}
		}
		if(count==0)	printf("\n沒有打開該文件或不存在該文件！\n");
		if(open==NULL)	printf("\n所有文件都已經(jīng)關閉！\n");
		if(open!=NULL)	outputopen();
	}
}

void readfile(){
	afd *q;
	int n;
	q=(afd*)malloc(sizeof(afd));
	if(open==NULL) printf("\n沒有打開文件！不能讀，請先打開文件！\n");
	else{
		printf("\n請輸入要閱讀的文件名：");
		scanf("%s",q->openname);
		for(openpr=open;openpr!=NULL;openpr=openpr->next){
			if(!strcmp(q->openname,openpr->openname)) n=2;
		}
		if(n==2){
			for(pr=file;pr!=NULL;pr=pr->next){
				if(!strcmp(q->openname,pr->filename)){
					printf("\n 文件名        保護碼       文件長度 \t\n");
					printf("\n  %-11s ",pr->filename);
					printf("  %-11s ",pr->password);
					printf("  %-11s\n",pr->filelength);
				}
			}
		}
		else{
			printf("\n沒有打開該文件！不能讀，請先打開該文件！\n");
		}
	}
}

void writefile(){
	afd *q;
	int n,len;
	q=(afd*)malloc(sizeof(afd));
	if(open==NULL) printf("\n沒有打開文件！不能寫，請先打開文件！\n");
	else{
		printf("\n請輸入要寫入的文件名：");
		scanf("%s",q->openname);
		for(openpr=open;openpr!=NULL;openpr=openpr->next){
			if(!strcmp(q->openname,openpr->openname)) n=2;
		}
		if(n==2){
			for(pr=file;pr!=NULL;pr=pr->next){
				if(!strcmp(q->openname,pr->filename)){
					printf("\n 文件名        保護碼       文件長度 \t\n");
					printf("\n  %-11s ",pr->filename);
					printf("  %-11s ",pr->password);
					printf("  %-11s\n",pr->filelength);
					printf("\n請輸入寫入文件長度：");
					scanf("%s",pr->filelength);
					printf("\n寫入成功！\n");
					printf("\n 文件名        保護碼       文件長度 \t\n");
					printf("\n  %-11s ",pr->filename);
					printf("  %-11s ",pr->password);
					printf("  %-11s\n",pr->filelength);
				}
			}
		}
		else{
			printf("\n沒有打開該文件！不能讀，請先打開該文件！\n");
		}
	}
}

void outputfile(){
	printf("\n 文件名        保護碼       文件長度 \t\n");
	for(p=file;p!=NULL;p=p->next){
		printf("\n  %-11s ",p->filename);
		printf("  %-11s ",p->password);
		printf("  %-11s\n",p->filelength);
	}
}

void admin(){
	int i;
	cmd=(char*)malloc(sizeof(char));
	printf("\n請輸入用戶名：");
	scanf("%s",cmd);
	for(i=0;;i++){
		for(i=0;i<10;i++){
			if(!strcmp(cmd,user[i].username))  break;
		}
		if(i==10){
			printf("\n無此用戶文件!\n\n");
			printf("請輸入用戶名：");
			scanf("%s",cmd);
			continue;
		}
		break;
	}
}

main(){
	int n=0;
	admin();
	initfile();
	printf("\n當前用戶文件目錄如下：\n");
	outputfile();
	while(strcmp(cmd,"bye")){
		printf("\n請輸入操作命令：");
		scanf("%s",cmd);
		if(!strcmp(cmd,"create")){
			createfile();
			continue;
		}
		if(!strcmp(cmd,"delete")){
			deletefile();
			continue;
		}
		if(!strcmp(cmd,"open")){
			for(openpr=open;openpr!=NULL;openpr=openpr->next) n++;
			if(n==5)printf("\n打開的文件已經(jīng)達到5個，不允許再打開文件！\n");
			else openfile();
			n=0;
			continue;
		}
		if(!strcmp(cmd,"close")){
			closefile();
			continue;
		}
		if(!strcmp(cmd,"read")){
			readfile();
			continue;
		}
		if(!strcmp(cmd,"write")){
			writefile();
			continue;
		}
		if(!strcmp(cmd,"bye"));
		else printf("\n無此操作命令！\n");
	}
	if(file==NULL) printf("\n當前用戶沒有保存任何文件！\n\n");
	else{
		printf("\n當前用戶保存的文件目錄如下：\n");
		outputfile();
	}
	printf("\n");
}