/**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#include "uigamemenu.h"
#include "ui/frame/uiframe.h"
#include "ui/frame/settings/uisettings.h"
#include "ui/frame/backpack/uibackpack.h"
#include "ui/rpg/textbox/uitextboxmain.h"
#include "util/memory.h"
#include "display/spritebatch/spritebatch.h"
#include "display/screen/screen.h"
#include "assert/assert.h"
#include "locale/localemanager.h"
#include "asset/loader/locale/assetlocaleloader.h"
#include "save/save.h"
#include "error/error.h"
#include "util/string.h"

#define UI_GAME_MENU_INDEX_CHARACTERS 0
#define UI_GAME_MENU_INDEX_ITEMS 1
#define UI_GAME_MENU_INDEX_SETTINGS 2
#define UI_GAME_MENU_INDEX_SAVE 3

// Only one save slot is exposed through this menu for now - there is no
// slot-select UI yet, and SAVE_FILE_COUNT_MAX > 1 exists for later.
#define UI_GAME_MENU_SAVE_SLOT 0

static void uiGameMenuSaveComplete(errorret_t result, void *user) {
  if(errorIsNotOk(result)) {
    // Generously sized - stringFormat asserts (crashes) rather than
    // truncating if the message doesn't fit, so this must comfortably fit
    // the longest platform save-error message plus this prefix.
    char_t msg[256];
    stringFormat(
      msg, sizeof(msg), "Save failed: %s", result.state->message
    );
    errorCatch(result);
    uiTextboxMainSetText(msg);
    return;
  }

  uiTextboxMainSetText("Game saved.");
}

static void uiGameMenuSave(void) {
  if(!saveIsAvailable()) {
    uiTextboxMainSetText("Can't save - no save device found.");
    return;
  }
  if(saveIsBusy()) return;// A save/load dialog (e.g. on PSP) is already up.

  saveWrite(UI_GAME_MENU_SAVE_SLOT, uiGameMenuSaveComplete, NULL);
}

uigamemenu_t UI_GAME_MENU;

void uiGameMenuSelected(
  const uimenu_t *menu,
  const uint8_t index,
  const uimenuitem_t *item
) {
  if(index == UI_GAME_MENU_INDEX_ITEMS) uiBackpackOpen();
  if(index == UI_GAME_MENU_INDEX_SETTINGS) uiSettingsOpen();
  if(index == UI_GAME_MENU_INDEX_SAVE) uiGameMenuSave();
}

errorret_t uiGameMenuInit(void) {
  memoryZero(&UI_GAME_MENU, sizeof(uigamemenu_t));

  errorChain(assetLocaleGetString(
    &LOCALE.entry->data.locale,
    "ui.game_menu.characters",
    0,
    UI_GAME_MENU.charactersLabel,
    UI_GAME_MENU_LABEL_MAX
  ));
  errorChain(assetLocaleGetString(
    &LOCALE.entry->data.locale,
    "ui.game_menu.items",
    0,
    UI_GAME_MENU.itemsLabel,
    UI_GAME_MENU_LABEL_MAX
  ));
  errorChain(assetLocaleGetString(
    &LOCALE.entry->data.locale,
    "ui.game_menu.settings",
    0,
    UI_GAME_MENU.settingsLabel,
    UI_GAME_MENU_LABEL_MAX
  ));
  errorChain(assetLocaleGetString(
    &LOCALE.entry->data.locale,
    "ui.game_menu.save",
    0,
    UI_GAME_MENU.saveLabel,
    UI_GAME_MENU_LABEL_MAX
  ));

  MENU_BEGIN(
    &UI_GAME_MENU.menu, UI_GAME_MENU.items, uiGameMenuSelected, NULL, NULL
  );
  MENU_BUTTON(UI_GAME_MENU.charactersLabel);
  MENU_BUTTON(UI_GAME_MENU.itemsLabel);
  MENU_BUTTON(UI_GAME_MENU.settingsLabel);
  MENU_BUTTON(UI_GAME_MENU.saveLabel);

  MENU_END(UI_GAME_MENU.items, 1);

  errorOk();
}

errorret_t uiGameMenuDraw(void) {
  if(!uiMenuIsActive(&UI_GAME_MENU.menu)) errorOk();

  const float_t width = UI_GAME_MENU_WIDTH;
  const float_t height = (float_t)SCREEN.scanHeight;
  const float_t x = (float_t)(SCREEN.scanX + SCREEN.scanWidth) - width;
  const float_t y = (float_t)SCREEN.scanY;

  errorChain(uiFrameDraw(x, y, width, height));
  errorChain(uiMenuDraw(
    &UI_GAME_MENU.menu,
    x + UI_FRAME_START_X,
    y + UI_FRAME_START_Y,
    width - (UI_FRAME_START_X * 2),
    height - (UI_FRAME_START_Y * 2)
  ));

  errorChain(spriteBatchFlush());
  errorOk();
}

bool_t uiGameMenuIsOpen(void) {
  return uiMenuIsActive(&UI_GAME_MENU.menu);
}

void uiGameMenuOpen() {
  uiMenuOpen(&UI_GAME_MENU.menu);
}

void uiGameMenuClose() {
  uiMenuClose(&UI_GAME_MENU.menu);
}

errorret_t uiGameMenuDispose(void) {
  errorOk();
}