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#undef _HAVE_CURSES

#if _CURSES_LIB == 0
#elif _CURSES_LIB == 1
#include <curses.h>
#ifndef NCURSES_VERSION
#warning "_CURSES_LIB=1 but NCURSES_VERSION not defined; tview is NOT compiled"
#else
#define _HAVE_CURSES
#endif
#elif _CURSES_LIB == 2
#include <xcurses.h>
#define _HAVE_CURSES
#else
#warning "_CURSES_LIB is not 0, 1 or 2; tview is NOT compiled"
#endif


#include "bam_tview.h"

#ifdef _HAVE_CURSES



typedef struct CursesTview {
	tview_t view;
	WINDOW *wgoto, *whelp;
	} curses_tview_t;




#define FROM_TV(ptr) ((curses_tview_t*)ptr)

static void curses_destroy(tview_t* base)
	{
	curses_tview_t* tv=(curses_tview_t*)base;

	
	delwin(tv->wgoto); delwin(tv->whelp);
	endwin();

	base_tv_destroy(base);
	
	free(tv);
	}

/*
 void (*my_mvprintw)(struct AbstractTview* ,int,int,const char*,...);
    void (*my_)(struct AbstractTview*,int,int,int);
    void (*my_attron)(struct AbstractTview*,int);
    void (*my_attroff)(struct AbstractTview*,int);
    void (*my_clear)(struct AbstractTview*);
    int (*my_colorpair)(struct AbstractTview*,int);
*/

static void curses_mvprintw(struct AbstractTview* tv,int y ,int x,const char* fmt,...)
	{
	unsigned int size=tv->mcol+2;
	char* str=malloc(size);
	if(str==0) exit(EXIT_FAILURE);
	va_list argptr;
  	va_start(argptr, fmt);
	vsnprintf(str,size, fmt, argptr);
	va_end(argptr);
	mvprintw(y,x,str);
	free(str);
	}

static void curses_mvaddch(struct AbstractTview* tv,int y,int x,int ch)
	{
	mvaddch(y,x,ch);
	}
    	
static void curses_attron(struct AbstractTview* tv,int flag)
    {
    attron(flag);
    }
static void curses_attroff(struct AbstractTview* tv,int flag)
    {
    attroff(flag);
    }
static void curses_clear(struct AbstractTview* tv)
    {
    clear();
    }
    
static int curses_colorpair(struct AbstractTview* tv,int flag)
    {
    return COLOR_PAIR(flag);
    }

static int curses_drawaln(struct AbstractTview* tv, int tid, int pos)
    {
    return base_draw_aln(tv,  tid, pos);
    }



static void tv_win_goto(curses_tview_t *tv, int *tid, int *pos)
	{
	char str[256], *p;
	int i, l = 0;
	tview_t *base=(tview_t*)tv;
	wborder(tv->wgoto, '|', '|', '-', '-', '+', '+', '+', '+');
	mvwprintw(tv->wgoto, 1, 2, "Goto: ");
	for (;;) {
		int c = wgetch(tv->wgoto);
		wrefresh(tv->wgoto);
		if (c == KEY_BACKSPACE || c == '\010' || c == '\177') {
			if(l > 0) --l;
		} else if (c == KEY_ENTER || c == '\012' || c == '\015') {
			int _tid = -1, _beg, _end;
			if (str[0] == '=') {
				_beg = strtol(str+1, &p, 10) - 1;
				if (_beg > 0) {
					*pos = _beg;
					return;
				}
			} else {
				bam_parse_region(base->header, str, &_tid, &_beg, &_end);
				if (_tid >= 0) {
					*tid = _tid; *pos = _beg;
					return;
				}
			}
		} else if (isgraph(c)) {
			if (l < TV_MAX_GOTO) str[l++] = c;
		} else if (c == '\027') l = 0;
		else if (c == '\033') return;
		str[l] = '\0';
		for (i = 0; i < TV_MAX_GOTO; ++i) mvwaddch(tv->wgoto, 1, 8 + i, ' ');
		mvwprintw(tv->wgoto, 1, 8, "%s", str);
	}
}




static void tv_win_help(curses_tview_t *tv) {
	int r = 1;
	tview_t* base=(tview_t*)base;
	WINDOW *win = tv->whelp;
	wborder(win, '|', '|', '-', '-', '+', '+', '+', '+');
	mvwprintw(win, r++, 2, "        -=-    Help    -=- ");
	r++;
	mvwprintw(win, r++, 2, "?          This window");
	mvwprintw(win, r++, 2, "Arrows     Small scroll movement");
	mvwprintw(win, r++, 2, "h,j,k,l    Small scroll movement");
	mvwprintw(win, r++, 2, "H,J,K,L    Large scroll movement");
	mvwprintw(win, r++, 2, "ctrl-H     Scroll 1k left");
	mvwprintw(win, r++, 2, "ctrl-L     Scroll 1k right");
	mvwprintw(win, r++, 2, "space      Scroll one screen");
	mvwprintw(win, r++, 2, "backspace  Scroll back one screen");
	mvwprintw(win, r++, 2, "g          Go to specific location");
	mvwprintw(win, r++, 2, "m          Color for mapping qual");
	mvwprintw(win, r++, 2, "n          Color for nucleotide");
	mvwprintw(win, r++, 2, "b          Color for base quality");
	mvwprintw(win, r++, 2, "c          Color for cs color");
	mvwprintw(win, r++, 2, "z          Color for cs qual");
	mvwprintw(win, r++, 2, ".          Toggle on/off dot view");
	mvwprintw(win, r++, 2, "s          Toggle on/off ref skip");
	mvwprintw(win, r++, 2, "r          Toggle on/off rd name");
	mvwprintw(win, r++, 2, "N          Turn on nt view");
	mvwprintw(win, r++, 2, "C          Turn on cs view");
	mvwprintw(win, r++, 2, "i          Toggle on/off ins");
	mvwprintw(win, r++, 2, "q          Exit");
	r++;
	mvwprintw(win, r++, 2, "Underline:      Secondary or orphan");
	mvwprintw(win, r++, 2, "Blue:    0-9    Green: 10-19");
	mvwprintw(win, r++, 2, "Yellow: 20-29   White: >=30");
	wrefresh(win);
	wgetch(win);
}

static int curses_underline(tview_t* tv)
	{
	return A_UNDERLINE;
	}
	
static int curses_loop(tview_t* tv)
	{
	int tid, pos;
	curses_tview_t *CTV=(curses_tview_t *)tv;
	tid = tv->curr_tid; pos = tv->left_pos;
	while (1) {
		int c = getch();
		switch (c) {
			case '?': tv_win_help(CTV); break;
			case '\033':
			case 'q': goto end_loop;
			case '/': 
			case 'g': tv_win_goto(CTV, &tid, &pos); break;
			case 'm': tv->color_for = TV_COLOR_MAPQ; break;
			case 'b': tv->color_for = TV_COLOR_BASEQ; break;
			case 'n': tv->color_for = TV_COLOR_NUCL; break;
			case 'c': tv->color_for = TV_COLOR_COL; break;
			case 'z': tv->color_for = TV_COLOR_COLQ; break;
			case 's': tv->no_skip = !tv->no_skip; break;
			case 'r': tv->show_name = !tv->show_name; break;
			case KEY_LEFT:
			case 'h': --pos; break;
			case KEY_RIGHT:
			case 'l': ++pos; break;
			case KEY_SLEFT:
			case 'H': pos -= 20; break;
			case KEY_SRIGHT:
			case 'L': pos += 20; break;
			case '.': tv->is_dot = !tv->is_dot; break;
			case 'N': tv->base_for = TV_BASE_NUCL; break;
			case 'C': tv->base_for = TV_BASE_COLOR_SPACE; break;
			case 'i': tv->ins = !tv->ins; break;
			case '\010': pos -= 1000; break;
			case '\014': pos += 1000; break;
			case ' ': pos += tv->mcol; break;
			case KEY_UP:
			case 'j': --tv->row_shift; break;
			case KEY_DOWN:
			case 'k': ++tv->row_shift; break;
			case KEY_BACKSPACE:
			case '\177': pos -= tv->mcol; break;
			case KEY_RESIZE: getmaxyx(stdscr, tv->mrow, tv->mcol); break;
			default: continue;
		}
		if (pos < 0) pos = 0;
		if (tv->row_shift < 0) tv->row_shift = 0;
		tv->my_drawaln(tv, tid, pos);
	}
end_loop:
	return 0;
}




tview_t* curses_tv_init(const char *fn, const char *fn_fa, const char *samples)
	{
	curses_tview_t *tv = (curses_tview_t*)calloc(1, sizeof(curses_tview_t));
	tview_t* base=(tview_t*)tv;
	if(tv==0)
		{
		fprintf(stderr,"Calloc failed\n");
		return 0;
		}
	
	base_tv_init(base,fn,fn_fa,samples);
	/* initialize callbacks */
#define SET_CALLBACK(fun) base->my_##fun=curses_##fun;
	SET_CALLBACK(destroy);
	SET_CALLBACK(mvprintw);
	SET_CALLBACK(mvaddch);
	SET_CALLBACK(attron);
	SET_CALLBACK(attroff);
	SET_CALLBACK(clear);
	SET_CALLBACK(colorpair);
	SET_CALLBACK(drawaln);
	SET_CALLBACK(loop);
	SET_CALLBACK(underline);
#undef SET_CALLBACK

	initscr();
	keypad(stdscr, TRUE);
	clear();
	noecho();
	cbreak();
	
	getmaxyx(stdscr, base->mrow, base->mcol);
	tv->wgoto = newwin(3, TV_MAX_GOTO + 10, 10, 5);
	tv->whelp = newwin(29, 40, 5, 5);
	
	start_color();
	init_pair(1, COLOR_BLUE, COLOR_BLACK);
	init_pair(2, COLOR_GREEN, COLOR_BLACK);
	init_pair(3, COLOR_YELLOW, COLOR_BLACK);
	init_pair(4, COLOR_WHITE, COLOR_BLACK);
	init_pair(5, COLOR_GREEN, COLOR_BLACK);
	init_pair(6, COLOR_CYAN, COLOR_BLACK);
	init_pair(7, COLOR_YELLOW, COLOR_BLACK);
	init_pair(8, COLOR_RED, COLOR_BLACK);
	init_pair(9, COLOR_BLUE, COLOR_BLACK);
	return base;
	}


#else // #ifdef _HAVE_CURSES
#include <stdio.h>
#warning "No curses library is available; tview with curses is disabled."

extern tview_t* text_tv_init(const char *fn, const char *fn_fa, const char *samples);

tview_t* curses_tv_init(const char *fn, const char *fn_fa, const char *samples)
	{
	return text_tv_init(fn,fn_fa,samples);
	}
#endif // #ifdef _HAVE_CURSES