import React from 'react';
import { StyleSheet, View } from 'react-native';
import { useTheme, Text, IconButton, Button, Surface } from 'react-native-paper';

export interface EmptyStateProps {
  /** MaterialCommunityIcons icon name */
  icon: string;
  /** Title displayed prominently */
  title: string;
  /** Optional description below the title */
  description?: string;
  /** Label for the optional action button */
  actionLabel?: string;
  /** Callback when the action button is pressed */
  onAction?: () => void;
}

/**
 * Reusable empty-state placeholder with an icon, title, description,
 * and an optional call-to-action button.
 */
export function EmptyState({
  icon,
  title,
  description,
  actionLabel,
  onAction,
}: EmptyStateProps) {
  const theme = useTheme();

  return (
    <Surface
      style={[styles.container, { backgroundColor: theme.colors.surface }]}
      elevation={0}
    >
      <View style={styles.content}>
        <IconButton
          icon={icon}
          size={64}
          iconColor={theme.colors.onSurfaceVariant}
          style={styles.icon}
          disabled
        />
        <Text
          variant="titleMedium"
          style={[styles.title, { color: theme.colors.onSurface }]}
        >
          {title}
        </Text>
        {description ? (
          <Text
            variant="bodyMedium"
            style={[styles.description, { color: theme.colors.onSurfaceVariant }]}
          >
            {description}
          </Text>
        ) : null}
        {actionLabel && onAction ? (
          <Button
            mode="contained"
            onPress={onAction}
            style={styles.actionButton}
          >
            {actionLabel}
          </Button>
        ) : null}
      </View>
    </Surface>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    borderRadius: 12,
  },
  content: {
    alignItems: 'center',
    justifyContent: 'center',
    padding: 24,
    gap: 8,
  },
  icon: {
    margin: 0,
  },
  title: {
    textAlign: 'center',
  },
  description: {
    textAlign: 'center',
    maxWidth: 280,
  },
  actionButton: {
    marginTop: 8,
  },
});