import type {
  InputHTMLAttributes,
  SelectHTMLAttributes,
  TextareaHTMLAttributes,
} from 'react';

export type PlatformTextFieldSize = 'xs' | 'sm' | 'md' | 'lg';
export type PlatformTextFieldDensity = 'default' | 'compact' | 'roomy';
export type PlatformTextFieldTone = 'warm' | 'rose' | 'emerald' | 'sky';
export type PlatformTextFieldSurface = 'platform' | 'editorDark';

type PlatformTextFieldBaseProps = {
  size?: PlatformTextFieldSize;
  density?: PlatformTextFieldDensity;
  tone?: PlatformTextFieldTone;
  surface?: PlatformTextFieldSurface;
};

type PlatformTextFieldInputProps = Omit<
  InputHTMLAttributes<HTMLInputElement>,
  'size'
> &
  PlatformTextFieldBaseProps & {
    variant?: 'input';
  };

type PlatformTextFieldTextareaProps =
  TextareaHTMLAttributes<HTMLTextAreaElement> &
    PlatformTextFieldBaseProps & {
      variant: 'textarea';
    };

export type PlatformTextFieldProps =
  | PlatformTextFieldInputProps
  | PlatformTextFieldTextareaProps;

export type PlatformSelectFieldProps = Omit<
  SelectHTMLAttributes<HTMLSelectElement>,
  'size'
> &
  PlatformTextFieldBaseProps;

const PLATFORM_TEXT_FIELD_SIZE_CLASS: Record<PlatformTextFieldSize, string> = {
  xs: 'text-sm leading-5',
  sm: 'text-sm font-semibold',
  md: 'text-sm leading-6',
  lg: 'text-base font-semibold',
};

const PLATFORM_TEXT_FIELD_PLATFORM_DENSITY_CLASS: Record<
  PlatformTextFieldDensity,
  string
> = {
  default: 'rounded-[1rem] bg-white/86 px-3 py-3',
  compact: 'rounded-[0.85rem] bg-white/90 px-3 py-2',
  roomy: 'rounded-[1rem] bg-white/90 px-4 py-3',
};

const PLATFORM_TEXT_FIELD_EDITOR_DARK_DENSITY_CLASS: Record<
  PlatformTextFieldDensity,
  string
> = {
  default: 'rounded-[1rem] bg-black/30 px-3 py-3',
  compact: 'rounded-[0.85rem] bg-black/30 px-3 py-2',
  roomy: 'rounded-[1rem] bg-black/30 px-4 py-3',
};

const PLATFORM_TEXT_FIELD_PLATFORM_TONE_CLASS: Record<
  PlatformTextFieldTone,
  string
> = {
  warm: 'focus:border-[var(--platform-surface-hover-border)] focus:ring-[var(--platform-warm-border)]',
  rose: 'focus:border-rose-200 focus:ring-rose-100',
  emerald: 'focus:border-emerald-200 focus:ring-emerald-100',
  sky: 'focus:border-sky-200 focus:ring-sky-100',
};

const PLATFORM_TEXT_FIELD_EDITOR_DARK_TONE_CLASS: Record<
  PlatformTextFieldTone,
  string
> = {
  warm: 'focus:border-amber-300/40',
  rose: 'focus:border-rose-300/40',
  emerald: 'focus:border-emerald-400/40',
  sky: 'focus:border-sky-400/40',
};

function buildPlatformTextFieldClassName({
  surface,
  size,
  density,
  tone,
  multiline,
  className,
}: {
  surface: PlatformTextFieldSurface;
  size: PlatformTextFieldSize;
  density: PlatformTextFieldDensity;
  tone: PlatformTextFieldTone;
  multiline?: boolean;
  className?: string;
}) {
  const isEditorDark = surface === 'editorDark';

  return [
    'w-full platform-text-field outline-none transition disabled:cursor-not-allowed disabled:opacity-60',
    isEditorDark
      ? 'platform-text-field--editor-dark border border-white/10 text-white'
      : 'border border-[var(--platform-subpanel-border)] text-[var(--platform-text-strong)] focus:bg-white focus:ring-2',
    isEditorDark
      ? PLATFORM_TEXT_FIELD_EDITOR_DARK_DENSITY_CLASS[density]
      : PLATFORM_TEXT_FIELD_PLATFORM_DENSITY_CLASS[density],
    PLATFORM_TEXT_FIELD_SIZE_CLASS[size],
    isEditorDark
      ? PLATFORM_TEXT_FIELD_EDITOR_DARK_TONE_CLASS[tone]
      : PLATFORM_TEXT_FIELD_PLATFORM_TONE_CLASS[tone],
    multiline ? 'resize-none' : null,
    className,
  ]
    .filter(Boolean)
    .join(' ');
}

/**
 * 平台白底表单输入框。
 * 统一承接结果页 / 工作台白底圆角输入框和文本域的基础 chrome。
 */
export function PlatformTextField({
  variant = 'input',
  size = 'sm',
  density = 'default',
  tone = 'warm',
  surface = 'platform',
  className,
  ...fieldProps
}: PlatformTextFieldProps) {
  const fieldClassName = buildPlatformTextFieldClassName({
    surface,
    size,
    density,
    tone,
    multiline: variant === 'textarea',
    className,
  });

  if (variant === 'textarea') {
    return (
      <textarea
        {...(fieldProps as TextareaHTMLAttributes<HTMLTextAreaElement>)}
        className={fieldClassName}
      />
    );
  }

  return (
    <input
      {...(fieldProps as InputHTMLAttributes<HTMLInputElement>)}
      className={fieldClassName}
    />
  );
}

/**
 * 平台白底下拉框。
 * 与 PlatformTextField 共享输入 chrome，避免业务页为同一组表单控件重复拼样式。
 */
export function PlatformSelectField({
  size = 'sm',
  density = 'default',
  tone = 'warm',
  surface = 'platform',
  className,
  ...selectProps
}: PlatformSelectFieldProps) {
  const fieldClassName = buildPlatformTextFieldClassName({
    surface,
    size,
    density,
    tone,
    className,
  });

  return <select {...selectProps} className={fieldClassName} />;
}