/* vim: tabstop=4 shiftwidth=4 noexpandtab
 *
 * Client-side Window Decoration library
 */

#include <stdint.h>
#include "graphics.h"
#include "yutani.h"
#include "decorations.h"
#include "shmemfonts.h"

uint32_t decor_top_height     = 33;
uint32_t decor_bottom_height  = 6;
uint32_t decor_left_width     = 6;
uint32_t decor_right_width    = 6;

#define TEXT_OFFSET_X 10
#define TEXT_OFFSET_Y 16

#define INACTIVE 8

#define BORDERCOLOR rgb(60,60,60)
#define BACKCOLOR rgb(20,20,20)
#define TEXTCOLOR rgb(255,255,255)

static int u_height = 33;
static int ul_width = 10;
static int ur_width = 10;
static int ml_width = 6;
static int mr_width = 6;
static int l_height = 9;
static int ll_width = 9;
static int lr_width = 9;
static int llx_offset = 3;
static int lly_offset = 3;
static int lrx_offset = 3;
static int lry_offset = 3;

static sprite_t * sprites[16];

#define TEXT_OFFSET 24

static void init_sprite_png(int id, char * path) {
	sprites[id] = malloc(sizeof(sprite_t));
	load_sprite_png(sprites[id], path);
}

static void (*render_decorations_)(yutani_window_t *, gfx_context_t *, char *, int) = NULL;

static void render_decorations_simple(yutani_window_t * window, gfx_context_t * ctx, char * title, int decors_active) {

	for (uint32_t i = 0; i < window->height; ++i) {
		GFX(ctx, 0, i) = BORDERCOLOR;
		GFX(ctx, window->width - 1, i) = BORDERCOLOR;
	}

	for (uint32_t i = 1; i < decor_top_height; ++i) {
		for (uint32_t j = 1; j < window->width - 1; ++j) {
			GFX(ctx, j, i) = BACKCOLOR;
		}
	}

	draw_string(ctx, TEXT_OFFSET_X, TEXT_OFFSET_Y, TEXTCOLOR, title);

	for (uint32_t i = 0; i < window->width; ++i) {
		GFX(ctx, i, 0) = BORDERCOLOR;
		GFX(ctx, i, decor_top_height - 1) = BORDERCOLOR;
		GFX(ctx, i, window->height - 1) = BORDERCOLOR;
	}


}

static void initialize_simple() {
	decor_top_height     = 24;
	decor_bottom_height  = 1;
	decor_left_width     = 1;
	decor_right_width    = 1;

	render_decorations_ = render_decorations_simple;
}

static void render_decorations_fancy(yutani_window_t * window, gfx_context_t * ctx, char * title, int decors_active) {
	int width = window->width;
	int height = window->height;

	for (int j = 0; j < decor_top_height; ++j) {
		for (int i = 0; i < width; ++i) {
			GFX(ctx,i,j) = 0;
		}
	}

	for (int j = decor_top_height; j < height - decor_bottom_height; ++j) {
		for (int i = 0; i < decor_left_width; ++i) {
			GFX(ctx,i,j) = 0;
		}
		for (int i = width - decor_right_width; i < width; ++i) {
			GFX(ctx,i,j) = 0;
		}
	}

	for (int j = height - decor_bottom_height; j < height; ++j) {
		for (int i = 0; i < width; ++i) {
			GFX(ctx,i,j) = 0;
		}
	}

	draw_sprite(ctx, sprites[decors_active + 0], 0, 0);
	for (int i = 0; i < width - (ul_width + ur_width); ++i) {
		draw_sprite(ctx, sprites[decors_active + 1], i + ul_width, 0);
	}
	draw_sprite(ctx, sprites[decors_active + 2], width - ur_width, 0);
	for (int i = 0; i < height - (u_height + l_height); ++i) {
		draw_sprite(ctx, sprites[decors_active + 3], 0, i + u_height);
		draw_sprite(ctx, sprites[decors_active + 4], width - mr_width, i + u_height);
	}
	draw_sprite(ctx, sprites[decors_active + 5], 0, height - l_height);
	for (int i = 0; i < width - (ll_width + lr_width); ++i) {
		draw_sprite(ctx, sprites[decors_active + 6], i + ll_width, height - l_height);
	}
	draw_sprite(ctx, sprites[decors_active + 7], width - lr_width, height - l_height);

	set_font_face(FONT_SANS_SERIF_BOLD);
	set_font_size(12);

	int title_offset = (width / 2) - (draw_string_width(title) / 2);
	if (decors_active == 0) {
		draw_string(ctx, title_offset, TEXT_OFFSET, rgb(226,226,226), title);
	} else {
		draw_string(ctx, title_offset, TEXT_OFFSET, rgb(147,147,147), title);
	}
}

static void initialize_fancy() {
	init_sprite_png(0, "/usr/share/ttk/active/ul.png");
	init_sprite_png(1, "/usr/share/ttk/active/um.png");
	init_sprite_png(2, "/usr/share/ttk/active/ur.png");
	init_sprite_png(3, "/usr/share/ttk/active/ml.png");
	init_sprite_png(4, "/usr/share/ttk/active/mr.png");
	init_sprite_png(5, "/usr/share/ttk/active/ll.png");
	init_sprite_png(6, "/usr/share/ttk/active/lm.png");
	init_sprite_png(7, "/usr/share/ttk/active/lr.png");

	init_sprite_png(INACTIVE + 0, "/usr/share/ttk/inactive/ul.png");
	init_sprite_png(INACTIVE + 1, "/usr/share/ttk/inactive/um.png");
	init_sprite_png(INACTIVE + 2, "/usr/share/ttk/inactive/ur.png");
	init_sprite_png(INACTIVE + 3, "/usr/share/ttk/inactive/ml.png");
	init_sprite_png(INACTIVE + 4, "/usr/share/ttk/inactive/mr.png");
	init_sprite_png(INACTIVE + 5, "/usr/share/ttk/inactive/ll.png");
	init_sprite_png(INACTIVE + 6, "/usr/share/ttk/inactive/lm.png");
	init_sprite_png(INACTIVE + 7, "/usr/share/ttk/inactive/lr.png");

	decor_top_height     = 33;
	decor_bottom_height  = 6;
	decor_left_width     = 6;
	decor_right_width    = 6;

	render_decorations_ = render_decorations_fancy;
}

void render_decorations(yutani_window_t * window, gfx_context_t * ctx, char * title) {
	if (!window) return;
	if (!window->focused) {
		render_decorations_(window, ctx, title, INACTIVE);
	} else {
		render_decorations_(window, ctx, title, 0);
	}
}

void render_decorations_inactive(yutani_window_t * window, gfx_context_t * ctx, char * title) {
	if (!window) return;
	render_decorations_(window, ctx, title, INACTIVE);
}

void init_decorations() {
	init_shmemfonts();

	char * theme = getenv("WM_THEME");
	if (theme && !strcmp(theme, "simple")) {
		initialize_simple();
	} else {
		initialize_fancy();
	}
}

uint32_t decor_width() {
	return decor_left_width + decor_right_width;
}

uint32_t decor_height() {
	return decor_top_height + decor_bottom_height;
}