#include "cursesview.h"

#include <pthread.h>
#include <curses.h>
#include <panel.h>
#include <string.h>

#define CURSESWIN_COUNT 3

// Global variable shared by all threads to say "finish current operation and go away"
extern int end;

// window updated by cursesUpdateSliceDump callback from "worker" thread, with a mutex for prevent fuzzy concurrent updates
WINDOW *winUpdateSliceDump=NULL;
static pthread_mutex_t ncursesWriteMutex = PTHREAD_MUTEX_INITIALIZER;
address_t sliceDumpBegin, sliceDumpEnd, sliceDumpMin, sliceDumpMax;

// Helpers declaration (below the interesting code of this file)
int cursesInit(WINDOW *wins[], PANEL *panels[], int count);
void cursesUnInit(WINDOW *wins[], PANEL *panels[], int count);
void cursesUpdateSliceDump(slices_evt_t *slicesEvt, slice_t *modifiedSlice);
//void printInMiddle(WINDOW *win, int starty, int startx, int width, char *string, chtype color);
void makeWin(WINDOW **win, PANEL **panel, int h, int w, int y, int x, char title[]);

void cursesMainLoop(slices_evt_t *slicesEvt) {
	char msg[255];
	int ch, i;

	WINDOW *wins[CURSESWIN_COUNT];
	PANEL  *panels[CURSESWIN_COUNT];

#ifdef NCURSES_MOUSE_VERSION
	int dispatched, res;
	int (*mouseEventListener)(MEVENT mevent, WINDOW *winDebug);
	MEVENT mevent;
	PANEL *p;
#endif

	cursesInit(wins, panels, CURSESWIN_COUNT);

	sliceDumpBegin=sliceDumpMin=slicesEvt->data->min;
	sliceDumpEnd=sliceDumpMax=slicesEvt->data->max;

	wattron(wins[CURSESWIN_COUNT-1], COLOR_PAIR(4));
	mvwprintw(wins[CURSESWIN_COUNT-1], 1, 0, "F2:Exit  F5:Zoom left  F6:Unzoom left  F7:Unzoom right  F8:Zoom right");
//	wattroff(wins[CURSESWIN_COUNT-1], COLOR_PAIR(4));
	
//	update_panels();
	doupdate();

	/* Enable worker listener */
	//FIXME : check pointers ?
	winUpdateSliceDump=wins[1];
	slicesEvt->eventListener=cursesUpdateSliceDump;

	while((ch = getch()) != KEY_F(2)) {

		pthread_mutex_lock(&ncursesWriteMutex);
		
		switch(ch) {
			// Zoom handling
			//FIXME : Do something less stupid. Try to reuse mouse event zoom code for keyboard
			case KEY_F(5):
				sliceDumpEnd=(sliceDumpBegin+sliceDumpEnd)/2;
				break;
			case KEY_F(6):
				sliceDumpBegin=sliceDumpMin;
				break;
			case KEY_F(7):
				sliceDumpEnd=sliceDumpMax;
				break;
			case KEY_F(8):
				sliceDumpBegin=(sliceDumpBegin+sliceDumpEnd)/2;
				break;

			// Panel focus
			case '1':
			case '2':
			case '3':
				i=ch-'0';
				if (i>0 && i<=CURSESWIN_COUNT) {
					top_panel(panels[i-1]);
					update_panels();
				}
				break;
#ifdef NCURSES_MOUSE_VERSION
			case KEY_MOUSE:
				// Seems to have a mouse event
				res = getmouse(&mevent);
				if ( res == OK ) {
					// Try to find in which panel (search first in top-level panel and go down)
					p=NULL;
					while ( ( p=panel_below(p) ) != NULL) {
						if ( wenclose(panel_window(p), mevent.y, mevent.x) ) {
							break;
						}
					}

					// If we found a panel, dispatch the event if a listener is set
					if (p != NULL) {
						mouseEventListener=(int (*)(MEVENT mevent, WINDOW *winDebug)) panel_userptr(p); 
						dispatched=(mouseEventListener==NULL)?0:mouseEventListener(mevent, wins[0]);
						if ( ! dispatched ) {
							// If no listener or event not consumed, use the default behavior : set the panel on top if BUTTON1_CLICKED
							if ( (mevent.bstate & BUTTON1_CLICKED) == BUTTON1_CLICKED) {
								top_panel(p);
							}
						}
					}
				}
				break;
#endif
			default:
				sprintf(msg, "Unhandled key ch==0x%x", ch);
				wattron(wins[0], COLOR_PAIR(4));
				mvwprintw(wins[0], 2, 0, msg);
 
		}
	
		doupdate();

		sprintf(msg, "Viewing [%lli-%lli] of [%lli-%lli] working region      ", sliceDumpBegin, sliceDumpEnd, slicesEvt->data->min, slicesEvt->data->max);
		wattron(wins[0], COLOR_PAIR(4));
		mvwprintw(wins[0], 1, 0, msg);

		pthread_mutex_unlock(&ncursesWriteMutex);
	}

	pthread_mutex_lock(&(slicesEvt->eventListenerMutex));
	slicesEvt->eventListener=NULL;
	pthread_mutex_unlock(&(slicesEvt->eventListenerMutex));

	end=1;
	cursesUnInit(wins, panels, CURSESWIN_COUNT);
}

// TODO : faire une structure avec tous les éléments graphiques utiles au listener et tout passer par référence de la mainloop à ce listener
#define DEFAULT_ZOOM_FACTOR 2.f

int winSlicesMouseEventListener(MEVENT mevent, WINDOW *winDebug) {
	bool resb;
	int pX, pY, maxX, maxY;
	address_t delta;
	float pos;
	// For debugging char buf[255];

	pY=mevent.y;
	pX=mevent.x;
	resb=wmouse_trafo(winUpdateSliceDump, &pY, &pX, false);
	if ( resb == TRUE ) {
		getmaxyx(winUpdateSliceDump, maxY, maxX);
		// First ligne (pY) is line 1 but first char (pX) is char 0 so we have to translate Y coords by -1
		pos=(0.0f+(pY-1)*maxX+pX)/((maxY-1)*maxX-1);
		delta=sliceDumpEnd-sliceDumpBegin;
		sliceDumpBegin+=delta*pos/DEFAULT_ZOOM_FACTOR*(DEFAULT_ZOOM_FACTOR-1);
		sliceDumpEnd-=delta*(1-pos)/DEFAULT_ZOOM_FACTOR*(DEFAULT_ZOOM_FACTOR-1);
	}

/*
	// Debug code
	sprintf(buf, "Debug : pX==%i, pY==%i, maxX==%i, maxY==%i, pos==%f, sliceDumpEnd==%lli, sliceDumpBegin=%lli, delta==%lli", pX, pY, maxX, maxY, pos, sliceDumpEnd, sliceDumpBegin, delta);
	wattron(winDebug, COLOR_PAIR(4));
	mvwprintw(winDebug, 2, 0, buf);
*/
	return 1;
}

int cursesInit(WINDOW *wins[], PANEL *panels[], int count) {
	int screenH, screenW;
#ifdef NCURSES_MOUSE_VERSION
	char buf[255];
	mmask_t mmask;
#endif

	/* Initialize curses */
	initscr();
	start_color();
	raw();
	keypad(stdscr, TRUE);
	noecho();
#ifdef NCURSES_MOUSE_VERSION
	mmask = mousemask(REPORT_MOUSE_POSITION|BUTTON1_CLICKED, NULL);
#endif

	/* Initialize all the colors */
	init_pair(1, COLOR_WHITE, COLOR_BLACK);
	init_pair(2, COLOR_WHITE, COLOR_BLUE);
	init_pair(3, COLOR_BLUE, COLOR_BLACK);
	init_pair(4, COLOR_CYAN, COLOR_BLACK);

	/* Initialize windows and panels */
	getmaxyx(stdscr, screenH, screenW);
	if ( screenH < 8 || screenW < 40 ) return 1;

	makeWin(wins+0, panels+0, 3		, screenW, 0		, 0, "Menu");
	makeWin(wins+1, panels+1, screenH-6	, screenW, 3		, 0, "Main Win");
	makeWin(wins+2, panels+2, 2		, screenW, screenH-3	, 0, "Commands");
	
	/* Set up the user pointers to the next panel
	set_panel_userptr(panels[0], panels[1]);
	set_panel_userptr(panels[1], panels[2]);
	set_panel_userptr(panels[2], panels[0]);
	*/

	set_panel_userptr(panels[1], winSlicesMouseEventListener);

#ifdef NCURSES_MOUSE_VERSION
	sprintf(buf, "Debug infos : mmask=%lx", mmask);
	mvprintw(LINES - 3, 0, buf);
#endif

	/* Update the stacking order. 2nd panel will be on top */
	update_panels();

	return 0;
}

void cursesUnInit(WINDOW *wins[], PANEL *panels[], int count) {
	int i;

	for (i=0;i<count;i++) {
		del_panel(panels[i]);
		delwin(wins[i]);
	}
	endwin();
}

void cursesUpdateSliceDump(slices_evt_t *slicesEvt, slice_t *modifiedSlice) {
//	char *strProgress="|/-\\";
//	static int progress=0;
	char *toPrint;
	address_t blockSize=0;
	unsigned int charCount=(getmaxx(winUpdateSliceDump)-getbegx(winUpdateSliceDump))*(getmaxy(winUpdateSliceDump)-getbegy(winUpdateSliceDump)+2);

	//TODO : refesh only right parts of the representation
	// This need a representation that not depends on what is already drawn because of consistency and because it not possible to re-read printed ASCII representation in curse windows

	pthread_mutex_lock(&ncursesWriteMutex);


	toPrint=slicesDump(slicesEvt->data, &blockSize, charCount, sliceDumpBegin, sliceDumpEnd);
	if (toPrint != NULL) {
		attron(COLOR_PAIR(4));
		mvwprintw(winUpdateSliceDump, 1, 0, toPrint);
//		attroff(COLOR_PAIR(4));

		update_panels();
		doupdate();

		free(toPrint);
	}

/*	sprintf(toPrint, "%c - %p %p", strProgress[progress], slicesEvt, modifiedSlice);
	progress=(progress+1)%strlen(strProgress);
*/
	pthread_mutex_unlock(&ncursesWriteMutex);
}

/*
void printInMiddle(WINDOW *win, int starty, int startx, int width, char *string, chtype color)
{	int length, x, y;
	float temp;

	if(win == NULL)
		win = stdscr;
	getyx(win, y, x);
	if(startx != 0)
		x = startx;
	if(starty != 0)
		y = starty;
	if(width == 0)
		width = 80;

	length = strlen(string);
	temp = (width - length)/ 2;
	x = startx + (int)temp;
	wattron(win, color);
	mvwprintw(win, y, x, "%s", string);
	wattroff(win, color);
	refresh();
}
*/
void makeWin(WINDOW **win, PANEL **panel, int h, int w, int y, int x, char title[]) {
	int i;
	*win = newwin(h, w, y, x);
	mvwprintw(*win, 0, 0, "%s", title);
	mvwchgat(*win, 0, 0, -1, A_BOLD, 2, NULL);
	for(i=1;i<h;i++) mvwchgat(*win, i, 0, -1, A_STANDOUT, 1, NULL);
	*panel = new_panel(*win);
}