#include <string.h>
#include "api.h"
#include "mp3app.h"
#include "key.h"
#include "lcd.h"
#define EBOOK_SCREEN_WITH		128
#define EBOOK_SCREEN_HIGHT	128
#define COLOR_BLACK		RGB565(0x00,0x00,0x00)
#define COLOR_WHITE		RGB565(0xFF,0xFF,0xFF)
#define COLOR_GOLD		RGB565(0xFF,0xC1,0x25)
#define COLOR_GREEN		RGB565(0x00,0x80,0x80)
extern BOOLEAN change_dir(FILE_INFORMATION *pDir);
extern void scan_dir_file(UINT8 search_mode, UINT8 *extstr, BOOLEAN select_dir);
extern UINT8 select;
extern UINT16 totdir, totfile, totitem;
extern BOOLEAN change_dir(FILE_INFORMATION *pDir);
extern void scan_dir_file(UINT8 search_mode, UINT8 *extstr, BOOLEAN select_dir);
extern UINT8 select;
extern FILE_INFORMATION curr_finfo, curr_dir, play_dir;
extern UINT16 totdir, totfile, totitem;
extern FILE_t *fp;
extern INT8U _buf[256];

UINT16 page=0,theSpChar=0;
BOOLEAN iEbook_end=FALSE,iOnlyPageOne=FALSE,isUp=FALSE;
int savePrePagePos[200];
int thePos=0;
void gfx_txt_display(UINT8 *str,int remainwords)
{
	INT8S data r1;
	UINT8 n, y,*tempstr;
	fg_color = COLOR_WHITE;
	bg_color = COLOR_BLACK;
	r1 = 0;
	n = 0;
	y = 0;
	api_s8GetFont16x16BMP(0, TRUE);
	while(remainwords--){//(*str != '\0') {
		tempstr=str+1;
		if(*str==0x0D&&*tempstr==0x0A)
			{
				n=0;
				y+=16;
				str+=2;
				remainwords--;
				if(y>=128)
					break;
				
				continue;
			}
		if(n >=16) {
			n = 0;
			y += 16;
			if(y >= 128)
				break;
		}
		
		if(*str <= 0x80 && r1 != 1) {
			if(lcd_putc_8x16((n * 8)+4, y, *str++))
				n++;
			continue;
		}
		else {
			r1 = api_s8GetFont16x16BMP(*str++, FALSE);
			if(r1 == 0) {
				if(lcd_putc_16x16((n * 8)+4, y, 0))
					n += 2;
			}
		}
	}
}

/*void vcheckUpSpChar(FILE_t *fileFp)
{
	INT8S data r1=0;
	int remainwords=0,n=16,i=128;
	UINT8 *tempStr,theinputStr[128],*tempStr1,y=128;
	theSpChar=0;
	api_bFileSeek(fileFp,-128, SEEK_CUR);
	remainwords=api_u16FileRead(theinputStr, sizeof(theinputStr), fileFp);
	if(remainwords!=sizeof(theinputStr))
		api_bFileSeek(fileFp,-remainwords, SEEK_CUR);
	else
		api_bFileSeek(fileFp,-128, SEEK_CUR);
	
	api_s8GetFont16x16BMP(0, TRUE);
	tempStr1=theinputStr+remainwords;
	while(1)
		{	
			tempStr=tempStr1-1;
			
			
			if(*tempStr1==0x0A&&*tempStr==0x0D)
			{
				y-=16;
				i=i-n-2;//i-=2;
				if(y<=0)
					break;
				tempStr1-=2;
				
				n=16;
				continue;
			}
			if(n<=0)
			{
				n=16;
				y-=16;
				if(y<=0)
					break;
			}
			if(*tempStr1!=0x0A||*tempStr!=0x0D)
				{
					if(*tempStr1 <= 0x80 && r1 != 1) 
						{
							n--;
							tempStr1--;
							i--;
						}
					else
						{
							i--;
							r1 = api_s8GetFont16x16BMP(*tempStr1--, FALSE);
							if(r1 == 0)
								n -= 2;
							//continue;
						}
				}			
			
		}
	theSpChar=i;
	
		
}*/



void vcheckSpChar(FILE_t *fileFp)
{
	INT8S data r1=0;
	int remainwords=0,n=0,i=0;
	UINT8 *tempStr,theinputStr[128],*tempStr1,y=0;
	theSpChar=0;
	api_bFileSeek(fileFp,0, SEEK_CUR);
	remainwords=api_u16FileRead(theinputStr, sizeof(theinputStr), fileFp);
	if(remainwords!=sizeof(theinputStr))
		api_bFileSeek(fileFp,-remainwords, SEEK_CUR);
	else
		api_bFileSeek(fileFp,-128, SEEK_CUR);
	api_s8GetFont16x16BMP(0, TRUE);
	tempStr1=theinputStr;
	while(1)
		{	
			tempStr=tempStr1+1;
			
			
			if(*tempStr1==0x0D&&*tempStr==0x0A)
			{
				
				y+=16;
				
				if(y>=128)
					break;
				
				tempStr1+=2;
				i+=2;
				
				n=0;
				continue;
			}
			if(n>=16)
			{
				n=0	;
				y+=16;
				if(y>=128)
					break;
			}
			if(*tempStr1!=0x0D||*tempStr!=0x0A)
				{
					if(*tempStr1 <= 0x80 && r1 != 1) 
						{
							n++;
							tempStr1++;
							i++;
						}
					else
						{
							i++;
							r1 = api_s8GetFont16x16BMP(*tempStr1++, FALSE);
							if(r1 == 0)
								n += 2;
							//continue;
						}
				}
			
			
					
			
		}
	theSpChar=i;
		
}


void vchangePageUp(void)
{
	int thePrewords=0;
	if(!iOnlyPageOne)
		{			
					
					if(thePos<=0)
						{
							thePos=0;
							thePrewords=savePrePagePos[0];
						}
					else
						{
							thePos--;
							thePrewords=savePrePagePos[thePos];
						}
					iEbook_end=FALSE;	
					api_bFileSeek(fp,-thePrewords, SEEK_CUR);
					gfx_bg(COLOR_BLACK);
					delay(10);
					api_u16FileRead(time2seg, thePrewords,fp);
					api_bFileSeek(fp,-thePrewords, SEEK_CUR);
					gfx_txt_display(time2seg,thePrewords);		
					/*if(remainwords!= theSpChar)
					{
						iEbook_end=TRUE;
						
					}
					else
						iEbook_end=FALSE;	*/
				
		}
	
}
	





void vchangePageDown(void)
{
	int remainwords=0,i=0;
	if(!iOnlyPageOne)
		{
			gfx_bg(COLOR_BLACK);	
			
			vcheckSpChar(fp);
			delay(10);
			
				
			api_bFileSeek(fp,0, SEEK_CUR);
			remainwords=api_u16FileRead(time2seg, theSpChar,fp);
			if(thePos>=200)
				{
					for(i=0;i<199;i++)
						savePrePagePos[i]=savePrePagePos[i+1];
					savePrePagePos[i]=remainwords;
				}
			else
				savePrePagePos[thePos++]=remainwords;
			gfx_txt_display(time2seg,remainwords);		
			if(remainwords!= theSpChar)
				{
					
					iEbook_end=TRUE;
					//api_bFileSeek(fp,-remainwords, SEEK_CUR);
				}
			else
					iEbook_end=FALSE;	
		}
	
}
void vchangePage(void)
{
	int remainwords=0;
	gfx_bg(COLOR_BLACK);
	thePos=0;
	vcheckSpChar(fp);
	
	api_bFileSeek(fp,0, SEEK_SET);
	remainwords=api_u16FileRead(time2seg, theSpChar,fp);
	savePrePagePos[thePos++]=remainwords;
	gfx_txt_display(time2seg,remainwords);
	if(remainwords!= theSpChar)
		{
			iOnlyPageOne=TRUE;
			api_bFileSeek(fp,-remainwords, SEEK_CUR);
		}
		
}


BOOLEAN bOpenTxt(UINT8 *filename)
{
	fp = NULL;	
	if((fp = api_pFileOpen(filename)) == NULL)
		return false;
	vchangePage();
	
}



BOOLEAN find_txt(void)
{

	my_sprintf(_buf,"%s.TXT",curr_finfo.pu8FileName);
	bOpenTxt(_buf);	
	return true;
}



void screen_ebook_Init(void)
{
	page=0;
	iEbook_end=FALSE;
	thePos=0;
	api_bStop();
	
	if(screen_level != SCREEN_LEVEL_MAINMENU) {
		
		return;
	}
	
	change_dir(0);
	scan_dir_file(SEARCH_MODE_CURRDIR,"TXT",0);
	screen_map(SCREEN_FILEBROWSER);
	
	
}

void screen_ebook(UINT8 key)
{

	
	switch(key) {
		case KEY_MENU:
			api_vFileClose(fp);
			iOnlyPageOne=FALSE;
			theSpChar=0;
			screen_map(SCREEN_MAINMENU);
			return;
		case KEY_PLAY:
			
				
			break;
		case KEY_AB_REPEAT:
			api_vFileClose(fp);
			iOnlyPageOne=FALSE;
			theSpChar=0;
			screen_map(SCREEN_FILEBROWSER);
			break;
		case KEY_NEXT:
			if(!iEbook_end)
				{
					
					page++;
					vchangePageDown();
					delay(10);
				}
			break;
		case KEY_PREV:
				
				page--;
				if(page<=0)
					page=0;
			
				vchangePageUp();
					
				delay(10);	
				
			break;
		default:
			return;
	}
	
	
}