import { observer } from "mobx-react";
import { useTheme } from "next-themes";
import { useCallback, useMemo } from "react";
// buzzwareTech imports
import type { I_THEME_OPTION } from "@buzzwaretech/constants";
import { THEME_OPTIONS } from "@buzzwaretech/constants";
import { useTranslation } from "@buzzwaretech/i18n";
import { setPromiseToast } from "@buzzwaretech/propel/toast";
import { applyCustomTheme } from "@buzzwaretech/utils";
// components
import { CustomThemeSelector } from "@/components/core/theme/custom-theme-selector";
import { ThemeSwitch } from "@/components/core/theme/theme-switch";
import { SettingsControlItem } from "@/components/settings/control-item";
// hooks
import { useUserProfile } from "@/hooks/store/user";

export const ThemeSwitcher = observer(function ThemeSwitcher(props: {
  option: {
    id: string;
    title: string;
    description: string;
  };
}) {
  // store hooks
  const { data: userProfile, updateUserTheme } = useUserProfile();
  // theme
  const { setTheme } = useTheme();
  // translation
  const { t } = useTranslation();
  // derived values
  const currentTheme = useMemo(() => {
    const userThemeOption = THEME_OPTIONS.find(
      (t) => t.value === userProfile?.theme?.theme,
    );
    return userThemeOption || null;
  }, [userProfile?.theme?.theme]);

  const handleThemeChange = useCallback(
    async (themeOption: I_THEME_OPTION) => {
      try {
        setTheme(themeOption.value);

        // If switching to custom theme and user has saved custom colors, apply them immediately
        if (
          themeOption.value === "custom" &&
          userProfile?.theme?.primary &&
          userProfile?.theme?.background &&
          userProfile?.theme?.darkPalette !== undefined
        ) {
          applyCustomTheme(
            userProfile.theme.primary,
            userProfile.theme.background,
            userProfile.theme.darkPalette ? "dark" : "light",
          );
        }

        const updatePromise = updateUserTheme({ theme: themeOption.value });
        setPromiseToast(updatePromise, {
          loading: "Updating theme...",
          success: {
            title: "Theme updated",
            message: () => "Reloading to apply changes...",
          },
          error: {
            title: "Error!",
            message: () => "Failed to update theme. Please try again.",
          },
        });
        // Wait for the promise to resolve, then reload after showing toast
        await updatePromise;
        window.location.reload();
      } catch (error) {
        console.error("Error updating theme:", error);
      }
    },
    [setTheme, updateUserTheme, userProfile],
  );

  if (!userProfile) return null;

  return (
    <>
      <SettingsControlItem
        title={t(props.option.title)}
        description={t(props.option.description)}
        control={
          <ThemeSwitch
            value={currentTheme}
            onChange={(themeOption) => {
              void handleThemeChange(themeOption);
            }}
          />
        }
      />
      {userProfile.theme?.theme === "custom" && <CustomThemeSelector />}
    </>
  );
});