2 files changed, 77 insertions, 13 deletions

diff --git a/src/GameLoop/shop.c b/src/GameLoop/shop.c
index eb6bed5..fb7ef4c 100644
--- a/src/GameLoop/shop.c
+++ b/src/GameLoop/shop.c
@@ -1,30 +1,78 @@
 #include "shop.h"
-
+#include "engine/maths.h"
+#include "ppu/ppu.h"
 
 bool hh_show_Shop(){
-	static hh_e_ShopStates hh_e_Shop = hh_e_STATE_SHOW;
+	static hh_e_ShopStates hh_e_Shop = hh_e_shop_init;
+	static hh_e_upgrades upgrades[HH_SHOP_UPG_DISPLAY] = {0};
+	static uint8_t selected = 0;
 	
 	switch (hh_e_Shop)
 	{
-	case hh_e_STATE_SHOW:
-		//hh_clear_screen();
+	case hh_e_shop_init:
+		hh_clear_screen();
+		hh_clear_sprite();
 
+		//TODO: render shop bg from level file here
 		//hh_setup_shop();
-		hh_e_Shop = hh_e_STATE_Input;
+		hh_shop_init(&upgrades);
+		selected = HH_SHOP_UPG_DISPLAY/2;
+		hh_shop_display(selected, &upgrades);
+		hh_e_Shop = hh_e_shop_main;
 		return false;
 		break;
-	case hh_e_STATE_Input:
+	case hh_e_shop_main:
+		if(g_hh_controller_p1.dpad_left || g_hh_controller_p1.dpad_right){
+			hh_shift_selected(&selected,(g_hh_controller_p1.dpad_right?1:0),0,HH_SHOP_UPG_DISPLAY);
+			hh_shop_display(selected, &upgrades);
+		}
 		if(g_hh_controller_p1.button_primary){
-			hh_e_Shop = hh_e_STATE_END;
+			//apply selected upgrade
+			hh_e_Shop = hh_e_shop_end;
+		}
+		if(g_hh_controller_p1.button_secondary){
+			hh_e_Shop = hh_e_shop_end;
 		}
 		break;
-	case hh_e_STATE_END:
-		hh_e_Shop = hh_e_STATE_SHOW;
+	case hh_e_shop_end:
+		hh_e_Shop = hh_e_shop_init;
 		return true;
 		break;
 	default:
-		hh_e_Shop = hh_e_STATE_SHOW;
+		hh_e_Shop = hh_e_shop_init;
 		break;
 	}
 	return false;
 }
+
+void hh_shop_init(hh_e_upgrades* in) {
+	for (int i = 0; i < HH_SHOP_UPG_DISPLAY; i++) {
+		in[i] = i%HH_SHOP_UPG_COUNT;
+	}
+}
+
+void hh_shop_display(uint8_t selected, hh_e_upgrades* upgrades) {
+	const vec_cor start = {48,16};
+	const uint8_t up = 8,
+					space = 24+8;
+
+	for (int i = 0; i < HH_SHOP_UPG_DISPLAY; i++) {
+		hh_ppu_update_foreground(i+16,
+		(hh_s_ppu_loc_fam_entry){
+			.horizontal_flip = false, .vertical_flip = false,
+			.position_x = i*space+start.x, .position_y = start.y + (i==selected?up:0),
+			.palette_index = 7,
+			.tilemap_index = i
+		});
+	}
+}
+
+void hh_shift_selected(uint8_t* pos, bool dir, uint8_t min, uint8_t max) {
+	if (dir) {
+		pos = CLAMP(++pos,min,max);
+	} else {
+		if (pos > 0) {
+			pos--;
+		}
+	}
+}
diff --git a/src/GameLoop/shop.h b/src/GameLoop/shop.h
index 4014f58..5cd6b53 100644
--- a/src/GameLoop/shop.h
+++ b/src/GameLoop/shop.h
@@ -7,10 +7,26 @@
 #include <stdbool.h>
 
 typedef enum {
-	hh_e_STATE_SHOW,
-	hh_e_STATE_Input,
-	hh_e_STATE_END
+	hh_e_shop_init,
+	hh_e_shop_main,
+	hh_e_shop_end
 } hh_e_ShopStates;
 
+/** @brief amount of upgrade types */
+#define HH_SHOP_UPG_COUNT 2
+/** @brief count of visible upgrades in shop */
+#define HH_SHOP_UPG_DISPLAY 4
+/** @brief all possible upgrades */
+typedef enum {
+	hh_e_UPG_JUMP,
+	hh_e_UPG_HEALTH
+} hh_e_upgrades;
+
+/** @brief init */
+void hh_shop_init(hh_e_upgrades* in);
+/** @brief deals with displayed entity rendering */
+void hh_shop_display(uint8_t selected, hh_e_upgrades* upgrades);
+/** @brief moves 'cursor' through selection field */
+void hh_shift_selected(uint8_t* pos, bool dir, uint8_t min, uint8_t max);
 
 bool hh_show_Shop();