import 'dart:io';

import 'package:device_info_plus/device_info_plus.dart';
import 'package:flutter/material.dart';
import 'package:package_info_plus/package_info_plus.dart';

const _gitHash = String.fromEnvironment('GIT_HASH');

/// Returns Android device info (manufacturer, model, OS release).
/// Returns an empty map on non-Android platforms or if the plugin fails.
Future<Map<String, String>> fetchAndroidDeviceInfo() async {
  if (!Platform.isAndroid) return {};
  try {
    final info = await DeviceInfoPlugin().androidInfo;
    return {
      'Manufacturer': info.manufacturer,
      'Model': info.model,
      'Android Version': info.version.release,
    };
  } catch (_) {
    return {};
  }
}

String _capitalize(String s) =>
    s.isEmpty ? s : '${s[0].toUpperCase()}${s.substring(1)}';

/// Builds the standard "about" markdown table for sharing / bug reports.
///
/// Pass [deviceInfo] from [fetchAndroidDeviceInfo].
/// Pass [imapCount] and [jmapCount] when available; both default to 0.
String buildAboutMarkdown(
  BuildContext context,
  PackageInfo? pkg,
  int imapCount,
  int jmapCount,
  Map<String, String> deviceInfo,
) {
  final size = MediaQuery.of(context).size;
  final pixelRatio = MediaQuery.of(context).devicePixelRatio;
  final physW = (size.width * pixelRatio).toInt();
  final physH = (size.height * pixelRatio).toInt();
  final version = pkg != null ? '${pkg.version}+${pkg.buildNumber}' : 'unknown';
  final versionDisplay = _gitHash.isNotEmpty
      ? '[$version](https://codeberg.org/guettli/sharedinbox/commit/$_gitHash)'
      : version;
  final osName = _capitalize(Platform.operatingSystem);
  final isDark = MediaQuery.of(context).platformBrightness == Brightness.dark;

  final gitCommitLine = _gitHash.isNotEmpty
      ? '| Git Commit | [$_gitHash](https://codeberg.org/guettli/sharedinbox/commit/$_gitHash) |\n'
      : '';

  final deviceLines =
      deviceInfo.entries.map((e) => '| ${e.key} | ${e.value} |\n').join();

  return '## [sharedinbox.de](https://sharedinbox.de)\n\n'
      '| Property | Value |\n'
      '|----------|-------|\n'
      '| App Version | $versionDisplay |\n'
      '$gitCommitLine'
      '| Platform | ${Platform.operatingSystem} |\n'
      '| $osName Version | ${Platform.operatingSystemVersion} |\n'
      '$deviceLines'
      '| Resolution | ${physW}x$physH px'
      ' (logical: ${size.width.toInt()}x${size.height.toInt()} pt,'
      ' ratio: ${pixelRatio.toStringAsFixed(1)}x) |\n'
      '| Dart Version | ${Platform.version.split(' ').first} |\n'
      '| Processors | ${Platform.numberOfProcessors} |\n'
      '| Dark Mode | ${isDark ? 'yes' : 'no'} |\n'
      '| IMAP Accounts | $imapCount |\n'
      '| JMAP Accounts | $jmapCount |\n';
}