import type { TypographyProps } from "@/components/ui/Typography/Typography";
import type { MainButtonProps } from "@/components/ui/MainButton/MainButton";

import type {
  HeaderDefinition,
  HeaderProgressDefinition,
  ListOptionDefinition,
  SelectionType,
  TypographyVariant,
  BottomActionButtonDefinition,
  ScreenDefinition,
} from "./types";
import type { LayoutQuestionProps } from "@/components/layout/LayoutQuestion/LayoutQuestion";
import type { ActionButtonProps } from "@/components/ui/ActionButton/ActionButton";
import type { BottomActionButtonProps } from "@/components/widgets/BottomActionButton/BottomActionButton";

type TypographyAs = "span" | "p" | "h1" | "h2" | "h3" | "h4" | "h5" | "h6" | "div";

interface TypographyDefaults {
  font?: TypographyVariant["font"];
  weight?: TypographyVariant["weight"];
  size?: TypographyVariant["size"];
  align?: TypographyVariant["align"];
  color?: TypographyVariant["color"];
}

interface BuildTypographyOptions<T extends TypographyAs> {
  as: T;
  defaults?: TypographyDefaults;
}

export function buildTypographyProps<T extends TypographyAs>(
  variant: TypographyVariant | undefined,
  options: BuildTypographyOptions<T>
): TypographyProps<T> | undefined {
  if (!variant) {
    return undefined;
  }

  const { as, defaults } = options;

  return {
    as,
    children: variant.text,
    font: variant.font ?? defaults?.font,
    weight: variant.weight ?? defaults?.weight,
    size: variant.size ?? defaults?.size,
    align: variant.align ?? defaults?.align,
    color: variant.color ?? defaults?.color,
    className: variant.className,
  } as TypographyProps<T>;
}

export function buildHeaderProgress(progress?: HeaderProgressDefinition) {
  if (!progress) {
    return undefined;
  }

  const { current, total, value, label, className } = progress;

  const computedValue =
    value ?? (current !== undefined && total ? (current / total) * 100 : undefined);

  return {
    value: computedValue,
    label,
    className,
  };
}

export function buildAutoHeaderProgress(
  currentScreenId: string,
  totalScreens: number,
  currentPosition: number,
  explicitProgress?: HeaderProgressDefinition
) {
  // If explicit progress is provided, use it
  if (explicitProgress) {
    return buildHeaderProgress(explicitProgress);
  }
  
  // Otherwise, auto-calculate
  const autoProgress: HeaderProgressDefinition = {
    current: currentPosition,
    total: totalScreens,
    label: `${currentPosition} of ${totalScreens}`,
  };
  
  return buildHeaderProgress(autoProgress);
}

export function mapListOptionsToButtons(
  options: ListOptionDefinition[],
  selectionType: SelectionType
): MainButtonProps[] {
  return options.map((option) => ({
    id: option.id,
    children: option.label,
    emoji: option.emoji,
    isCheckbox: selectionType === "multi",
    disabled: option.disabled,
  }));
}
export function shouldShowBackButton(header?: HeaderDefinition, canGoBack?: boolean) {
  if (header?.showBackButton === false) {
    return false;
  }
  return Boolean(canGoBack);
}

export function shouldShowHeader(header?: HeaderDefinition) {
  return header?.show !== false;
}

interface BuildActionButtonOptions {
  defaultText?: string;
  disabled?: boolean;
  onClick: () => void;
}

export function buildActionButtonProps(
  options: BuildActionButtonOptions,
  buttonDef?: BottomActionButtonDefinition
): ActionButtonProps {
  const { defaultText = "Continue", disabled = false, onClick } = options;
  
  return {
    children: buttonDef?.text ?? defaultText,
    cornerRadius: buttonDef?.cornerRadius,
    disabled: disabled, // disabled управляется только логикой экрана, не админкой
    onClick: disabled ? undefined : onClick,
  };
}

export function buildBottomActionButtonProps(
  options: BuildActionButtonOptions,
  buttonDef?: BottomActionButtonDefinition
): BottomActionButtonProps | undefined {
  // Если кнопка отключена (show: false) - не показывать ничего
  if (buttonDef?.show === false) {
    return undefined;
  }
  
  // В остальных случаях показать кнопку с градиентом
  const actionButtonProps = buildActionButtonProps(options, buttonDef);
  
  return {
    actionButtonProps,
    showGradientBlur: true, // Градиент всегда включен (как требовалось)
  };
}

interface BuildLayoutQuestionOptions {
  screen: ScreenDefinition;
  titleDefaults?: TypographyDefaults;
  subtitleDefaults?: TypographyDefaults;
  canGoBack: boolean;
  onBack: () => void;
  actionButtonOptions?: BuildActionButtonOptions;
  screenProgress?: { current: number; total: number };
}

export function buildLayoutQuestionProps(
  options: BuildLayoutQuestionOptions
): Omit<LayoutQuestionProps, "children"> {
  const { 
    screen, 
    titleDefaults = { font: "manrope", weight: "bold", align: "left" },
    subtitleDefaults = { font: "inter", weight: "medium", color: "muted", align: "left" },
    canGoBack, 
    onBack, 
    actionButtonOptions,
    screenProgress
  } = options;

  const showBackButton = shouldShowBackButton(screen.header, canGoBack);
  const showHeader = shouldShowHeader(screen.header);

  const bottomActionButtonProps = actionButtonOptions ? buildBottomActionButtonProps(
    actionButtonOptions,
    // Если передаются actionButtonOptions, это означает что кнопка должна показываться
    // Если кнопка отключена (show: false), принудительно включаем её
    'bottomActionButton' in screen ? 
      (screen.bottomActionButton?.show === false ? { ...screen.bottomActionButton, show: true } : screen.bottomActionButton) 
      : undefined
  ) : undefined;


  return {
    headerProps: showHeader ? {
      progressProps: screenProgress ? buildHeaderProgress({
        current: screenProgress.current,
        total: screenProgress.total,
        label: `${screenProgress.current} of ${screenProgress.total}`
      }) : buildHeaderProgress(screen.header?.progress),
      onBack: showBackButton ? onBack : undefined,
      showBackButton,
    } : undefined,
    title: buildTypographyProps(screen.title, {
      as: "h2",
      defaults: titleDefaults,
    }) ?? {
      as: "h2",
      children: screen.title.text,
    },
    subtitle: 'subtitle' in screen ? buildTypographyProps(screen.subtitle, {
      as: "p", 
      defaults: subtitleDefaults,
    }) : undefined,
    bottomActionButtonProps,
  };
}