import 'package:flutter/material.dart';
import '../../theme/app_theme.dart';
import '../sojorn_rich_text.dart';
import 'markdown_post_body.dart';
import 'post_view_mode.dart';

/// Post body text with reading-optimized typography.
///
/// Design Intent:
/// - Post body is the hero - clear visual hierarchy
/// - Line height adjusts based on content length
/// - Typography communicates emotional tone, not just content
/// - Supports both plain text and Markdown formatting
/// - ViewMode controls truncation behavior
class PostBody extends StatelessWidget {
  final String text;
  final String? bodyFormat; // 'plain' or 'markdown'
  final String? backgroundId; // theme id
  final bool isReflective;
  final PostViewMode mode;

  const PostBody({
    super.key,
    required this.text,
    this.bodyFormat,
    this.backgroundId,
    this.isReflective = false,
    this.mode = PostViewMode.feed,
  });

  /// Check if text contains Markdown syntax
  bool _hasMarkdownSyntax(String text) {
    // Check for common Markdown patterns
    return text.contains('**') || // Bold
        text.contains('_') || // Italic
        text.startsWith('#') || // Headers
        text.contains('[') && text.contains('](') || // Links
        text.contains('```') || // Code blocks
        text.contains('- ') || // Lists
        text.contains('> '); // Blockquotes
  }

  /// Determine max lines based on view mode
  int? get _maxLines {
    switch (mode) {
      case PostViewMode.feed:
        return 12; // Truncate in feed
      case PostViewMode.detail:
        return null; // Show all in detail
      case PostViewMode.compact:
        return 6; // More compact in profile lists
    }
  }

  @override
  Widget build(BuildContext context) {
    final cleanedText = text.replaceAll(RegExp(r'\s+$'), '');
    // Detect if this is Markdown content
    final isMarkdown =
        bodyFormat == 'markdown' || _hasMarkdownSyntax(cleanedText);

    // Choose typography based on content length
    final TextStyle style;
    if (isReflective) {
      style = AppTheme.postBodyReflective;
    } else {
      final estimatedLines = (cleanedText.length / 45).ceil();
      if (estimatedLines <= 3) {
        style = AppTheme.postBodyShort;
      } else if (estimatedLines >= 10) {
        style = AppTheme.postBodyLong;
      } else {
        style = AppTheme.postBody;
      }
    }

    if (isMarkdown) {
      return MarkdownPostBody(
        markdown: text,
        baseStyle: style,
        maxLines: _maxLines,
      );
    }

    return sojornRichText(
      text: cleanedText,
      style: style,
      maxLines: _maxLines,
    );
  }
}