#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "global.h"
#ifdef SFX
#include "special_effects.h"
#endif
#ifdef EYE_CANDY
#include "eye_candy_wrapper.h"
#endif

int console_root_win = -1;

int console_out_id = 40;
int console_in_id = 41;

int nr_console_lines;
int scroll_up_lines = 0;
int console_text_changed = 0;
int console_text_width = -1;

int locked_to_console = 0;

void clear_console(){
	console_text_changed = 1;
	lines_to_show = 0;
	not_from_the_end_console= 0;
	scroll_up_lines = 0;
}

void update_console_win (text_message * msg)
{
	int nlines = rewrap_message(msg, chat_zoom, console_text_width, NULL);
	if (msg->deleted) {
		if (scroll_up_lines > nlines) {
			scroll_up_lines -= nlines;
		} else {
			scroll_up_lines = 0;
			console_text_changed = 1;
		}
	} else {
		if (scroll_up_lines == 0) {
			console_text_changed = 1;
		} else {
			scroll_up_lines += nlines;
		}
	}
}

int display_console_handler (window_info *win)
{
	static int msg = 0, offset = 0;
	const unsigned char *sep_string = (unsigned char*)"^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^";
	
	// are we actively drawing things?
	if (SDL_GetAppState () & SDL_APPACTIVE)
	{
		set_font(chat_font);	// switch to the chat font
		if (console_text_changed)
		{
			find_line_nr (total_nr_lines, total_nr_lines - nr_console_lines - scroll_up_lines, FILTER_ALL, &msg, &offset, chat_zoom, console_text_width);		
			text_field_set_buf_pos (console_root_win, console_out_id, msg, offset);
			console_text_changed = 0;
		}

		draw_console_pic (cons_text);
		if (scroll_up_lines != 0)
		{
			glColor3f (1.0, 1.0, 1.0);
			draw_string_zoomed_clipped (10, 10 + win->len_y - input_widget->len_y - CONSOLE_SEP_HEIGHT - hud_y, sep_string, -1, win->len_x - hud_x - 20, CONSOLE_SEP_HEIGHT, chat_zoom);
		}
		//ttlanhil: disabled, until the scrolling in console is adusted to work with filtering properly
		//if the users prefer that console not be filtered, the following line can be removed.
		//if they want it filtered, then more work can be done until it works properly
		//((text_field*)((widget_find(console_root_win, console_out_id))->widget_info))->chan_nr = current_filter;

		draw_hud_interface ();
		set_font (0);	// switch to fixed
	}

#ifdef SFX
	if(special_effects){
		display_special_effects(0);
	}
#endif //SFX

	// remember the time stamp to improve FPS quality when switching modes
	next_fps_time=cur_time+1000;
	last_count=0;

#ifdef	EYE_CANDY
	ec_idle();
#endif	//EYE_CANDY

#ifdef NEW_LIGHTING
	light_idle();
#endif // NEW_LIGHTING

	draw_delay = 20;
	return 1;
}

int keypress_console_handler (window_info *win, int mx, int my, Uint32 key, Uint32 unikey)
{
	Uint16 keysym = key & 0xffff;
	
	// first try the keypress handler for all root windows
	if ( keypress_root_common (key, unikey) )
	{
		return 1;
	}
	else if(keysym == SDLK_UP)
 	{
		if (total_nr_lines > nr_console_lines + scroll_up_lines)
		{
			scroll_up_lines++;
			console_text_changed = 1;
		}
 	}
	else if (keysym == SDLK_DOWN)
 	{
		if(scroll_up_lines > 0)
		{
			scroll_up_lines--;
			console_text_changed = 1;
		}
	}
	else if (key == K_TABCOMPLETE && input_text_line.len > 0)
	{
		do_tab_complete(&input_text_line);
	}
	else if (key&ELW_ALT && keysym == SDLK_PAGEUP && total_nr_lines > nr_console_lines + scroll_up_lines)
	{
		scroll_up_lines = total_nr_lines - nr_console_lines;
		console_text_changed = 1;
	}
	else if (key&ELW_ALT && keysym == SDLK_PAGEDOWN && scroll_up_lines > 0)
	{
		scroll_up_lines = 0;
		console_text_changed = 1;
	}
	else if (keysym == SDLK_PAGEUP && total_nr_lines > nr_console_lines + scroll_up_lines)
	{
		scroll_up_lines += nr_console_lines - 1;
		if (nr_console_lines + scroll_up_lines > total_nr_lines)
			scroll_up_lines = total_nr_lines - nr_console_lines;
		console_text_changed = 1;
	}
	else if (keysym == SDLK_PAGEDOWN && scroll_up_lines > 0)
	{
		scroll_up_lines -= nr_console_lines - 1;
		if (scroll_up_lines < 0)
			scroll_up_lines = 0;
		console_text_changed = 1;
	}
	else if (key == K_MAP)
	{
		if (!locked_to_console && switch_to_game_map())
		{
			hide_window (console_root_win);
			show_window (map_root_win);
		}
	}
	else
	{
		Uint8 ch = key_to_char (unikey);

		reset_tab_completer();
		if ((ch == '`' || key == K_CONSOLE) && !locked_to_console)
		{
			hide_window (console_root_win);
			show_window (game_root_win);
			// Undo stupid quickbar hack
			if ( !get_show_window (quickbar_win) )
				show_window (quickbar_win);
			if ( !get_show_window (quickspell_win) )
				show_window (quickspell_win);
		}
		else if ( !text_input_handler (key, unikey) )
		{
			// nothing we can handle
			return 0;
		}
	}

	// we handled it, return 1 to let the window manager know
	return 1;	
}

int resize_console_handler (window_info *win, int width, int height)
{
	widget_resize (console_root_win, console_out_id, width - hud_x - 20, height - HUD_MARGIN_Y - input_widget->len_y - CONSOLE_SEP_HEIGHT - 10);
	widget_resize (console_root_win, input_widget->id, width - hud_x, input_widget->len_y);
	widget_move (console_root_win, input_widget->id, 0, height-input_widget->len_y-hud_y);

	nr_console_lines = (int) (height - input_widget->len_y - CONSOLE_SEP_HEIGHT - hud_y - 10) / (DEFAULT_FONT_Y_LEN * chat_zoom);
	console_text_width = (int) (width - hud_x - 20);
	
	return 1;
}

int click_console_handler (window_info *win, int mx, int my, Uint32 flags)
{
	if ( (flags & ELW_WHEEL_UP) && total_nr_lines > nr_console_lines + scroll_up_lines )
	{
		scroll_up_lines++;
		console_text_changed = 1;
	}
	else if ( (flags & ELW_WHEEL_DOWN) && scroll_up_lines > 0 )
	{
		scroll_up_lines--;
		console_text_changed = 1;
	}
	else
	{
		return 0; // we didn't handle it
	}
	
	return 1;	
}

int show_console_handler (window_info *win) {
	int i;

	for (i=0; i < MAX_CHAT_TABS; i++) {
		if (channels[i].open) {
			tab_set_label_color_by_id (chat_win, chat_tabcollection_id, channels[i].tab_id, -1.0f, -1.0f, -1.0f);
		}
	}
			
	hide_window(book_win);
	hide_window(paper_win);
	hide_window(color_race_win);

	if (use_windowed_chat == 1) {
		display_tab_bar ();
	}
	widget_move_win(input_widget->window_id, input_widget->id, console_root_win);
	input_widget->OnResize = input_field_resize;
	widget_resize (input_widget->window_id, input_widget->id, win->len_x-HUD_MARGIN_X, input_widget->len_y);
	widget_move (input_widget->window_id, input_widget->id, 0, win->len_y-input_widget->len_y-HUD_MARGIN_Y);
	widget_set_flags(input_widget->window_id, input_widget->id, (TEXT_FIELD_BORDER|INPUT_DEFAULT_FLAGS)^WIDGET_CLICK_TRANSPARENT);
	return 1;
}

void create_console_root_window (int width, int height)
{
	if (console_root_win < 0)
	{
		console_root_win = create_window ("Console", -1, -1, 0, 0, width, height, ELW_TITLE_NONE|ELW_SHOW_LAST);
		
		set_window_handler (console_root_win, ELW_HANDLER_DISPLAY, &display_console_handler);
		set_window_handler (console_root_win, ELW_HANDLER_KEYPRESS, &keypress_console_handler);
		set_window_handler (console_root_win, ELW_HANDLER_RESIZE, &resize_console_handler);
		set_window_handler (console_root_win, ELW_HANDLER_CLICK, &click_console_handler);
		set_window_handler (console_root_win, ELW_HANDLER_SHOW, &show_console_handler);

		console_out_id = text_field_add_extended (console_root_win, console_out_id, NULL, 10, 25, width - hud_x - 20, height - INPUT_HEIGHT - CONSOLE_SEP_HEIGHT - hud_y - 10, 0, chat_zoom, -1.0f, -1.0f, -1.0f, display_text_buffer, DISPLAY_TEXT_BUFFER_SIZE, CHAT_ALL, 0, 0, -1.0f, -1.0f, -1.0f);
		if(input_widget == NULL) {
			Uint32 id;
			id = text_field_add_extended(console_root_win, 0, NULL, 0, height-INPUT_HEIGHT-hud_y, width-hud_x, INPUT_HEIGHT, (INPUT_DEFAULT_FLAGS|TEXT_FIELD_BORDER)^WIDGET_CLICK_TRANSPARENT, chat_zoom, 0.77f, 0.57f, 0.39f, &input_text_line, 1, FILTER_ALL, INPUT_MARGIN, INPUT_MARGIN, 1.0, 1.0, 1.0);
			input_widget = widget_find(console_root_win, id);
			input_widget->OnResize = input_field_resize;
		} else {
			widget_move_win(input_widget->window_id, input_widget->id, console_root_win);
			widget_resize (input_widget->window_id, input_widget->id, width-HUD_MARGIN_X, input_widget->len_y);
			widget_move (input_widget->window_id, input_widget->id, 0, height-input_widget->len_y-HUD_MARGIN_Y);
		}
		widget_set_OnKey(input_widget->window_id, input_widget->id, chat_input_key);
		widget_set_flags(input_widget->window_id, input_widget->id, (TEXT_FIELD_BORDER|INPUT_DEFAULT_FLAGS)^WIDGET_CLICK_TRANSPARENT);

		nr_console_lines = (int) (height - input_widget->len_y -  CONSOLE_SEP_HEIGHT - hud_y - 10) / (18 * chat_zoom);
		console_text_width = (int) (width - hud_x - 20);
	}
}

int input_field_resize(widget_list *w, Uint32 x, Uint32 y)
{
	window_info *console_win = &windows_list.window[console_root_win];
	widget_list *console_out_w = widget_find(console_root_win, console_out_id);
	text_field *tf = w->widget_info;
	text_message *msg = &(tf->buffer[tf->msg]);
	int tmp_chan = msg->chan_idx;

	// set invalid width to force rewrap
	msg->wrap_width = 0;
	//Set to CHAT_NONE so rewrap_message doesn't mess with total_nr_lines.
	msg->chan_idx = CHAT_NONE;
	tf->nr_lines = rewrap_message(msg, w->size, w->len_x - 2 * tf->x_space, &tf->cursor);
	msg->chan_idx = tmp_chan;
	if(use_windowed_chat != 2) {
		window_info *win = &windows_list.window[w->window_id];
		widget_move(input_widget->window_id, input_widget->id, 0, win->len_y-input_widget->len_y-HUD_MARGIN_Y);
	}
	widget_resize(console_root_win, console_out_id, console_out_w->len_x, console_win->len_y-HUD_MARGIN_Y-input_widget->len_y-CONSOLE_SEP_HEIGHT-10);
	nr_console_lines = (int) console_out_w->len_y / (DEFAULT_FONT_Y_LEN * chat_zoom);
	console_text_changed = 1;
	return 1;
}

int history_grep(char * text, int len)
{
	unsigned int i = 0, wraps = 1;
	int idx = last_message;
	while(*text == ' '){
		text++;
	}
	if(strlen(text)<2){return 1;}

	for (i = 0; i <= total_nr_lines; ++i){
		if (++wraps >= display_text_buffer[idx].wrap_lines){
			wraps = 1;
			--idx;
			if(idx < 0){
				if(buffer_full){
					idx %= DISPLAY_TEXT_BUFFER_SIZE;
				} else {
					break;
				}
			}
		}
		if (i <= scroll_up_lines){
			continue;
		}
		if(get_string_occurance(text, display_text_buffer[idx].data, strlen(display_text_buffer[idx].data)-1, 1)>=0){
			if(i > total_nr_lines - nr_console_lines){
				scroll_up_lines = total_nr_lines - nr_console_lines;
			} else {
				scroll_up_lines = i+1;
			}
			console_text_changed = 1;
			break;
		}
	}
	return 1;
}