import 'package:flutter/material.dart';

import '../../theme/app_theme.dart';
import '../models/sync_run_event.dart';

String formatRelativeTime(DateTime startedAt, {DateTime? now}) {
  final DateTime reference = (now ?? DateTime.now()).toUtc();
  final Duration delta = reference.difference(startedAt.toUtc());
  if (delta.inMinutes < 1) {
    return 'just now';
  }
  if (delta.inHours < 1) {
    return '${delta.inMinutes}m ago';
  }
  if (delta.inDays < 1) {
    return '${delta.inHours}h ago';
  }
  return '${delta.inDays}d ago';
}

String formatMarketHistorySlotWire(DateTime value) {
  final DateTime utc = value.toUtc();
  final int slotHour = (utc.hour ~/ 4) * 4;
  final DateTime slotStart = DateTime.utc(
    utc.year,
    utc.month,
    utc.day,
    slotHour,
  );
  String two(int n) => n.toString().padLeft(2, '0');
  return '${slotStart.year.toString().padLeft(4, '0')}-'
      '${two(slotStart.month)}-${two(slotStart.day)}T'
      '${two(slotStart.hour)}:${two(slotStart.minute)}:${two(slotStart.second)}Z';
}

String formatUtcTimestamp(DateTime? value) {
  if (value == null) {
    return '—';
  }
  final DateTime utc = value.toUtc();
  final String hour = utc.hour.toString().padLeft(2, '0');
  final String minute = utc.minute.toString().padLeft(2, '0');
  return '${utc.year}-${utc.month.toString().padLeft(2, '0')}-'
      '${utc.day.toString().padLeft(2, '0')} $hour:$minute UTC';
}

String formatLocalTimestamp(DateTime? value) {
  if (value == null) {
    return '—';
  }
  final DateTime local = value.toLocal();
  final String hour = local.hour.toString().padLeft(2, '0');
  final String minute = local.minute.toString().padLeft(2, '0');
  return '${local.year}-${local.month.toString().padLeft(2, '0')}-'
      '${local.day.toString().padLeft(2, '0')} $hour:$minute';
}

String formatDurationMs(int? durationMs) {
  if (durationMs == null) {
    return '—';
  }
  if (durationMs < 1000) {
    return '${durationMs}ms';
  }
  return '${(durationMs / 1000).toStringAsFixed(1)}s';
}

String shortStatusLabel(SyncRunEvent event) {
  return switch (event.status) {
    SyncRunStatus.success => 'Success',
    SyncRunStatus.failed => 'Failed',
    SyncRunStatus.partial => 'Partial success',
    SyncRunStatus.inProgress => 'In progress',
  };
}

IconData severityIcon(SyncRunSeverity severity) {
  return switch (severity) {
    SyncRunSeverity.ok => Icons.check_circle_outline,
    SyncRunSeverity.warning => Icons.schedule,
    SyncRunSeverity.error => Icons.error_outline,
    SyncRunSeverity.rateLimit => Icons.speed,
  };
}

Color severityColor(SyncRunSeverity severity) {
  return switch (severity) {
    SyncRunSeverity.ok => AppColors.success,
    SyncRunSeverity.warning => Colors.orange,
    SyncRunSeverity.error => const Color(0xFFF87171),
    SyncRunSeverity.rateLimit => Colors.amber,
  };
}

String? parseHttpStatus(String? error) {
  if (error == null || error.trim().isEmpty) {
    return null;
  }
  final RegExpMatch? match = RegExp(r'\b(\d{3})\b').firstMatch(error);
  return match?.group(1);
}